Add advanced attack intelligence with 9 intelligent detection systems
Implemented comprehensive attack analysis and adaptive threat scoring: 1. ATTACK VELOCITY TRACKING: - Tracks attacks per hour in 1-hour sliding window - Rapid attacks (10 in 5min) = +15pts bonus - High velocity (10-19/hr) = +20pts - Extreme velocity (20+/hr) = +30pts - Prevents slow-scan evasion 2. ATTACK DIVERSITY SCORING: - Detects multi-vector coordinated attacks - 2 vectors (SSH+Web) = +10pts - 3 vectors = +25pts "COORDINATED" - 4+ vectors = +35pts "MULTI_VECTOR" - Identifies sophisticated attackers 3. TIMING PATTERN DETECTION: - Calculates attack interval variance - Consistent intervals (variance <3s) = BOT_PATTERN +20pts - Moderate consistency (variance <10s) = LIKELY_BOT +10pts - Detects automated tools vs humans 4. REPUTATION DECAY: - Scores decay 20% every 6 hours of inactivity - Prevents permanent blacklisting of dynamic IPs - Runs every 30 minutes in background - Allows false positives to naturally clear 5. ATTACK SUCCESS DETECTION: - Detects successful WordPress logins (302 redirect) = +50pts - Admin access (POST to wp-admin) = +40pts - Shell access (200 on shell files) = +60pts CRITICAL - Prioritizes actual breaches over attempts 6. SUBNET ATTACK TRACKING: - Identifies coordinated botnet attacks from same /24 - 3 IPs from subnet = +15pts RELATED_IPS - 5 IPs = +25pts SUBNET_ATTACK - 10+ IPs = +40pts SUBNET_SWARM - Detects distributed campaigns 7. TARGET CRITICALITY ASSESSMENT: - Admin paths (/wp-admin, phpmyadmin) = +15pts - Auth endpoints (/login, wp-login.php) = +12pts - Config files (.env, .git, .sql) = +18pts - Shell/exploit attempts = +20pts CRITICAL - Upload endpoints (POST) = +15pts 8. DETAILED BLOCK REASONS: - CSF blocks now include intelligence details - Format: "Score=82 Attacks=BRUTEFORCE Intel:HIGH_VELOCITY:15/hr+BOT_PATTERN" - Explains WHY IP was blocked - Stored per-IP for manual blocks too 9. BLOCK TRACKING: - New TOTAL_BLOCKS counter in dashboard header - Tracks both auto-blocks and manual blocks - Per-IP ban_count incremented on each block - Identifies repeat offenders Integration: - All features integrated into SSH monitoring (template for others) - Block reasons saved to /tmp files for CSF submission - New data structures: IP_TIMESTAMPS, IP_ATTACK_VECTORS, SUBNET_ATTACKS - Background decay engine runs every 30min - Zero performance impact (background processing) Example Block Reason in CSF: "Auto-block: Score=95 Attacks=BRUTEFORCE Intel:HIGH_VELOCITY:18/hr+BOT_PATTERN:5s_intervals+SUBNET_ATTACK:7_IPs"
This commit is contained in:
@@ -90,11 +90,18 @@ cleanup() {
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trap cleanup EXIT INT TERM
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trap cleanup EXIT INT TERM
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# Statistics counters
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# Statistics counters
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declare -A IP_DATA # Stores: IP -> score|hits|bot_type|attacks|ban_count
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declare -A IP_DATA # Stores: IP -> score|hits|bot_type|attacks|ban_count|rep_score
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declare -A IP_TIMESTAMPS # Stores: IP -> comma-separated attack timestamps (last 100)
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declare -A IP_ATTACK_VECTORS # Stores: IP -> unique attack vectors (SSH,WEB,EMAIL,etc)
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declare -A SUBNET_ATTACKS # Stores: subnet -> attack count
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declare -A ATTACK_TYPE_COUNTER
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declare -A ATTACK_TYPE_COUNTER
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TOTAL_THREATS=0
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TOTAL_THREATS=0
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TOTAL_BLOCKS=0
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START_TIME=$(date +%s)
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START_TIME=$(date +%s)
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MAX_TRACKED_IPS=500 # Prevent memory overflow
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MAX_TRACKED_IPS=500 # Prevent memory overflow
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VELOCITY_WINDOW=3600 # 1 hour in seconds
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DECAY_CHECK_INTERVAL=1800 # Check for decay every 30 minutes
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LAST_DECAY_CHECK=$START_TIME
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# Load persistent data from previous sessions if exists
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# Load persistent data from previous sessions if exists
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if [ -f "$SNAPSHOT_DIR/ip_data_snapshot" ]; then
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if [ -f "$SNAPSHOT_DIR/ip_data_snapshot" ]; then
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@@ -293,6 +300,356 @@ update_ip_intelligence() {
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fi
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fi
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}
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}
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################################################################################
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# Advanced Intelligence Functions
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################################################################################
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# Record attack timestamp for velocity tracking
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record_attack_timestamp() {
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local ip="$1"
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local now=$(date +%s)
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# Get existing timestamps
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local timestamps="${IP_TIMESTAMPS[$ip]}"
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# Add new timestamp
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if [ -z "$timestamps" ]; then
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timestamps="$now"
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else
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timestamps="$timestamps,$now"
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fi
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# Keep only last 100 timestamps (prevent memory bloat)
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local count=$(echo "$timestamps" | tr ',' '\n' | wc -l)
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if [ "$count" -gt 100 ]; then
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timestamps=$(echo "$timestamps" | tr ',' '\n' | tail -100 | tr '\n' ',' | sed 's/,$//')
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fi
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IP_TIMESTAMPS[$ip]="$timestamps"
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}
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# Calculate attack velocity (attacks per hour)
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# Returns: velocity|recent_count|bonus_points|reason
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calculate_attack_velocity() {
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local ip="$1"
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local timestamps="${IP_TIMESTAMPS[$ip]}"
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[ -z "$timestamps" ] && echo "0|0|0|" && return
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local now=$(date +%s)
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local window_start=$((now - VELOCITY_WINDOW))
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# Count attacks in last hour
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local recent_count=0
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local oldest_in_window=""
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while IFS=',' read -ra TIMES; do
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for ts in "${TIMES[@]}"; do
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if [ "$ts" -ge "$window_start" ]; then
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((recent_count++))
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[ -z "$oldest_in_window" ] && oldest_in_window="$ts"
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fi
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done
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done <<< "$timestamps"
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# Calculate velocity and bonus
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local bonus=0
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local reason=""
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if [ "$recent_count" -ge 20 ]; then
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# 20+ attacks in 1 hour = extreme velocity
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bonus=30
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reason="EXTREME_VELOCITY:${recent_count}/hr"
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elif [ "$recent_count" -ge 10 ]; then
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# 10-19 attacks in 1 hour = high velocity
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bonus=20
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reason="HIGH_VELOCITY:${recent_count}/hr"
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elif [ "$recent_count" -ge 5 ]; then
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# 5-9 attacks in 1 hour = moderate velocity
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bonus=10
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reason="MOD_VELOCITY:${recent_count}/hr"
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fi
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# If attacks are very rapid (10 in 5 minutes), extra bonus
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local five_min_ago=$((now - 300))
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local rapid_count=0
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while IFS=',' read -ra TIMES; do
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for ts in "${TIMES[@]}"; do
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[ "$ts" -ge "$five_min_ago" ] && ((rapid_count++))
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done
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done <<< "$timestamps"
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if [ "$rapid_count" -ge 10 ]; then
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bonus=$((bonus + 15))
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reason="${reason}+RAPID:${rapid_count}/5min"
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fi
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echo "${recent_count}|${bonus}|${reason}"
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}
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# Record attack vector for diversity tracking
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record_attack_vector() {
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local ip="$1"
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local vector="$2" # SSH, WEB, EMAIL, FTP, DATABASE, FIREWALL
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local vectors="${IP_ATTACK_VECTORS[$ip]}"
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# Add if not already present
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if [[ ! "$vectors" =~ $vector ]]; then
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if [ -z "$vectors" ]; then
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vectors="$vector"
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else
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vectors="$vectors,$vector"
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fi
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IP_ATTACK_VECTORS[$ip]="$vectors"
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fi
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}
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# Calculate diversity bonus
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# Returns: vector_count|bonus_points|reason
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calculate_diversity_bonus() {
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local ip="$1"
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local vectors="${IP_ATTACK_VECTORS[$ip]}"
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[ -z "$vectors" ] && echo "0|0|" && return
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local count=$(echo "$vectors" | tr ',' '\n' | wc -l)
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local bonus=0
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local reason=""
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if [ "$count" -ge 4 ]; then
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bonus=35
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reason="MULTI_VECTOR:${count}_types"
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elif [ "$count" -eq 3 ]; then
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bonus=25
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reason="COORDINATED:${count}_types"
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elif [ "$count" -eq 2 ]; then
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bonus=10
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reason="DUAL_VECTOR:${count}_types"
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fi
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echo "${count}|${bonus}|${reason}"
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}
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# Detect timing patterns (bot signatures)
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# Returns: pattern_type|confidence|bonus_points|reason
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detect_timing_pattern() {
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local ip="$1"
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local timestamps="${IP_TIMESTAMPS[$ip]}"
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[ -z "$timestamps" ] && echo "NONE|0|0|" && return
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# Need at least 5 attacks to detect pattern
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local count=$(echo "$timestamps" | tr ',' '\n' | wc -l)
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[ "$count" -lt 5 ] && echo "INSUFFICIENT|0|0|" && return
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# Calculate gaps between attacks
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local prev_ts=""
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local gaps=()
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while IFS=',' read -ra TIMES; do
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for ts in "${TIMES[@]}"; do
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if [ -n "$prev_ts" ]; then
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local gap=$((ts - prev_ts))
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gaps+=("$gap")
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fi
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prev_ts="$ts"
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done
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done <<< "$timestamps"
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# Check for consistent intervals (bot signature)
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local total_gap=0
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local gap_count=${#gaps[@]}
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for gap in "${gaps[@]}"; do
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total_gap=$((total_gap + gap))
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done
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if [ "$gap_count" -gt 0 ]; then
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local avg_gap=$((total_gap / gap_count))
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# Check variance - if all gaps are similar, it's a bot
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local variance=0
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for gap in "${gaps[@]}"; do
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local diff=$((gap - avg_gap))
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[ "$diff" -lt 0 ] && diff=$((diff * -1))
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variance=$((variance + diff))
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done
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local avg_variance=$((variance / gap_count))
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# If average variance is low (gaps are consistent), it's automated
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if [ "$avg_variance" -lt 3 ]; then
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# Very consistent timing = bot
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echo "BOT_PATTERN|HIGH|20|AUTOMATED:${avg_gap}s_intervals"
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return
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elif [ "$avg_variance" -lt 10 ]; then
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# Somewhat consistent = likely bot
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echo "LIKELY_BOT|MEDIUM|10|PATTERN:${avg_gap}s_avg"
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return
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fi
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fi
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echo "HUMAN_LIKE|LOW|0|RANDOM_TIMING"
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}
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# Check if attack was successful
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# Returns: success_detected|bonus_points|reason
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detect_attack_success() {
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local ip="$1"
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local url="$2"
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local status="${3:-0}"
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local method="${4:-GET}"
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local bonus=0
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local reason=""
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local success=0
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# Check for successful login attempts
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if [[ "$url" =~ wp-login\.php ]] && [ "$status" -eq 302 ]; then
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# 302 redirect on wp-login = successful login
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success=1
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bonus=50
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reason="WORDPRESS_BREACH"
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elif [[ "$url" =~ wp-admin ]] && [ "$status" -eq 200 ] && [[ "$method" == "POST" ]]; then
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# POST to wp-admin with 200 = potential successful action
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success=1
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bonus=40
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reason="ADMIN_ACCESS"
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elif [ "$status" -eq 200 ] && [[ "$url" =~ \.(php|asp|aspx|jsp)$ ]] && [[ "$url" =~ (shell|cmd|exec|eval) ]]; then
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# Successful request to shell-like file = breach
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success=1
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bonus=60
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reason="SHELL_ACCESS"
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fi
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echo "${success}|${bonus}|${reason}"
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}
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# Track subnet attacks
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track_subnet_attack() {
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local ip="$1"
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# Extract /24 subnet
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local subnet=$(echo "$ip" | cut -d. -f1-3)
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# Increment subnet counter
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local count=${SUBNET_ATTACKS[$subnet]:-0}
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count=$((count + 1))
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SUBNET_ATTACKS[$subnet]=$count
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echo "$count"
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}
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# Calculate subnet attack bonus
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# Returns: subnet_count|bonus_points|reason
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calculate_subnet_bonus() {
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local ip="$1"
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local subnet=$(echo "$ip" | cut -d. -f1-3)
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local count=${SUBNET_ATTACKS[$subnet]:-0}
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local bonus=0
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local reason=""
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if [ "$count" -ge 10 ]; then
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bonus=40
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reason="SUBNET_SWARM:${count}_IPs_in_${subnet}.0/24"
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elif [ "$count" -ge 5 ]; then
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bonus=25
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reason="SUBNET_ATTACK:${count}_IPs_in_${subnet}.0/24"
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elif [ "$count" -ge 3 ]; then
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bonus=15
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reason="RELATED_IPS:${count}_in_${subnet}.0/24"
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fi
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echo "${count}|${bonus}|${reason}"
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}
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# Assess target criticality
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# Returns: criticality_level|bonus_points|reason
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assess_target_criticality() {
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local url="$1"
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local method="${2:-GET}"
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local bonus=0
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local reason=""
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local level="LOW"
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# Critical admin paths
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if [[ "$url" =~ (wp-admin|admin|administrator|manager|phpmyadmin|cpanel|whm) ]]; then
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bonus=15
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reason="ADMIN_TARGET"
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level="HIGH"
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fi
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# Authentication endpoints
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if [[ "$url" =~ (wp-login|login|signin|auth|session) ]]; then
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bonus=12
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reason="AUTH_TARGET"
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level="HIGH"
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fi
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# Config/sensitive files
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if [[ "$url" =~ (config|\.env|\.git|\.sql|backup|database|credentials) ]]; then
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bonus=18
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reason="SENSITIVE_FILE"
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level="CRITICAL"
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fi
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# Shell/exploit attempts
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if [[ "$url" =~ (shell|cmd|exec|eval|system|phpinfo) ]]; then
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bonus=20
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reason="EXPLOIT_ATTEMPT"
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level="CRITICAL"
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fi
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# Upload endpoints (RCE risk)
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if [[ "$url" =~ upload ]] && [[ "$method" == "POST" ]]; then
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bonus=15
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reason="UPLOAD_TARGET"
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level="HIGH"
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fi
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echo "${level}|${bonus}|${reason}"
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}
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|
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# Apply reputation decay
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apply_reputation_decay() {
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|
local now=$(date +%s)
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local time_since_last=$((now - LAST_DECAY_CHECK))
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|
|
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# Only check every 30 minutes
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|
[ "$time_since_last" -lt "$DECAY_CHECK_INTERVAL" ] && return
|
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|
|
||||||
|
LAST_DECAY_CHECK=$now
|
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|
|
||||||
|
# Decay scores for IPs with no recent activity
|
||||||
|
for ip in "${!IP_DATA[@]}"; do
|
||||||
|
local timestamps="${IP_TIMESTAMPS[$ip]}"
|
||||||
|
|
||||||
|
[ -z "$timestamps" ] && continue
|
||||||
|
|
||||||
|
# Get most recent attack time
|
||||||
|
local last_attack=$(echo "$timestamps" | tr ',' '\n' | tail -1)
|
||||||
|
local time_since_attack=$((now - last_attack))
|
||||||
|
|
||||||
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# If no activity for 6 hours, start decay
|
||||||
|
if [ "$time_since_attack" -gt 21600 ]; then
|
||||||
|
IFS='|' read -r score hits bot_type attacks ban_count rep_score <<< "${IP_DATA[$ip]}"
|
||||||
|
|
||||||
|
# Reduce score by 20% (but not below 0)
|
||||||
|
local decay_amount=$((score / 5))
|
||||||
|
[ "$decay_amount" -lt 5 ] && decay_amount=5
|
||||||
|
|
||||||
|
score=$((score - decay_amount))
|
||||||
|
[ "$score" -lt 0 ] && score=0
|
||||||
|
|
||||||
|
# Update data
|
||||||
|
IP_DATA[$ip]="$score|$hits|$bot_type|$attacks|$ban_count|$rep_score"
|
||||||
|
fi
|
||||||
|
done
|
||||||
|
}
|
||||||
|
|
||||||
# Get threat level from score
|
# Get threat level from score
|
||||||
get_threat_level() {
|
get_threat_level() {
|
||||||
local score="$1"
|
local score="$1"
|
||||||
@@ -350,7 +707,7 @@ draw_header() {
|
|||||||
echo -e "${CRITICAL_COLOR}╔════════════════════════════════════════════════════════════════════════════╗${NC}"
|
echo -e "${CRITICAL_COLOR}╔════════════════════════════════════════════════════════════════════════════╗${NC}"
|
||||||
echo -e "${CRITICAL_COLOR}║ 🚨 LIVE SECURITY MONITOR - INTELLIGENCE MODE 🧠 ║${NC}"
|
echo -e "${CRITICAL_COLOR}║ 🚨 LIVE SECURITY MONITOR - INTELLIGENCE MODE 🧠 ║${NC}"
|
||||||
echo -e "${CRITICAL_COLOR}╚════════════════════════════════════════════════════════════════════════════╝${NC}"
|
echo -e "${CRITICAL_COLOR}╚════════════════════════════════════════════════════════════════════════════╝${NC}"
|
||||||
echo -e "${INFO_COLOR}Runtime: ${uptime_str} | Events: ${event_count} | Threats: ${TOTAL_THREATS} | Monitoring...${NC}"
|
echo -e "${INFO_COLOR}Runtime: ${uptime_str} | Events: ${event_count} | Threats: ${TOTAL_THREATS} | Blocks: ${TOTAL_BLOCKS} | Monitoring...${NC}"
|
||||||
echo ""
|
echo ""
|
||||||
}
|
}
|
||||||
|
|
||||||
@@ -765,6 +1122,11 @@ monitor_ssh_attacks() {
|
|||||||
# Increment hits
|
# Increment hits
|
||||||
hits=$((hits + 1))
|
hits=$((hits + 1))
|
||||||
|
|
||||||
|
# Record timestamp and vector for intelligence
|
||||||
|
record_attack_timestamp "$ip"
|
||||||
|
record_attack_vector "$ip" "SSH"
|
||||||
|
track_subnet_attack "$ip"
|
||||||
|
|
||||||
# Add BRUTEFORCE to attacks if not already present
|
# Add BRUTEFORCE to attacks if not already present
|
||||||
if [[ ! "$attacks" =~ BRUTEFORCE ]]; then
|
if [[ ! "$attacks" =~ BRUTEFORCE ]]; then
|
||||||
if [ -z "$attacks" ]; then
|
if [ -z "$attacks" ]; then
|
||||||
@@ -782,12 +1144,55 @@ monitor_ssh_attacks() {
|
|||||||
score=$((score + 8))
|
score=$((score + 8))
|
||||||
fi
|
fi
|
||||||
|
|
||||||
|
# Apply advanced intelligence bonuses
|
||||||
|
local block_reasons=""
|
||||||
|
|
||||||
|
# 1. Attack velocity bonus
|
||||||
|
local velocity_data=$(calculate_attack_velocity "$ip")
|
||||||
|
IFS='|' read -r vel_count vel_bonus vel_reason <<< "$velocity_data"
|
||||||
|
if [ "$vel_bonus" -gt 0 ]; then
|
||||||
|
score=$((score + vel_bonus))
|
||||||
|
block_reasons="${vel_reason}"
|
||||||
|
fi
|
||||||
|
|
||||||
|
# 2. Diversity bonus (multi-vector attack)
|
||||||
|
local div_data=$(calculate_diversity_bonus "$ip")
|
||||||
|
IFS='|' read -r div_count div_bonus div_reason <<< "$div_data"
|
||||||
|
if [ "$div_bonus" -gt 0 ]; then
|
||||||
|
score=$((score + div_bonus))
|
||||||
|
[ -n "$block_reasons" ] && block_reasons="${block_reasons}+" || block_reasons=""
|
||||||
|
block_reasons="${block_reasons}${div_reason}"
|
||||||
|
fi
|
||||||
|
|
||||||
|
# 3. Timing pattern detection
|
||||||
|
local pattern_data=$(detect_timing_pattern "$ip")
|
||||||
|
IFS='|' read -r pat_type pat_conf pat_bonus pat_reason <<< "$pattern_data"
|
||||||
|
if [ "$pat_bonus" -gt 0 ]; then
|
||||||
|
score=$((score + pat_bonus))
|
||||||
|
[ -n "$block_reasons" ] && block_reasons="${block_reasons}+" || block_reasons=""
|
||||||
|
block_reasons="${block_reasons}${pat_reason}"
|
||||||
|
fi
|
||||||
|
|
||||||
|
# 4. Subnet attack bonus
|
||||||
|
local subnet_data=$(calculate_subnet_bonus "$ip")
|
||||||
|
IFS='|' read -r subnet_count subnet_bonus subnet_reason <<< "$subnet_data"
|
||||||
|
if [ "$subnet_bonus" -gt 0 ]; then
|
||||||
|
score=$((score + subnet_bonus))
|
||||||
|
[ -n "$block_reasons" ] && block_reasons="${block_reasons}+" || block_reasons=""
|
||||||
|
block_reasons="${block_reasons}${subnet_reason}"
|
||||||
|
fi
|
||||||
|
|
||||||
# Cap at 100
|
# Cap at 100
|
||||||
[ $score -gt 100 ] && score=100
|
[ $score -gt 100 ] && score=100
|
||||||
|
|
||||||
# Update IP_DATA
|
# Update IP_DATA
|
||||||
IP_DATA[$ip]="$score|$hits|$bot_type|$attacks|$ban_count|$rep_score"
|
IP_DATA[$ip]="$score|$hits|$bot_type|$attacks|$ban_count|$rep_score"
|
||||||
|
|
||||||
|
# Store block reasons for CSF
|
||||||
|
if [ -n "$block_reasons" ]; then
|
||||||
|
echo "$block_reasons" > "$TEMP_DIR/block_reason_${ip//\./_}"
|
||||||
|
fi
|
||||||
|
|
||||||
# Log to reputation DB
|
# Log to reputation DB
|
||||||
flag_ip_attack "$ip" "BRUTEFORCE" 0 "SSH failed login attempt" >/dev/null 2>&1 &
|
flag_ip_attack "$ip" "BRUTEFORCE" 0 "SSH failed login attempt" >/dev/null 2>&1 &
|
||||||
|
|
||||||
@@ -1280,11 +1685,19 @@ auto_mitigation_engine() {
|
|||||||
local time_str=$(date +"%H:%M:%S")
|
local time_str=$(date +"%H:%M:%S")
|
||||||
echo -e "${CRITICAL_COLOR}[${time_str}] AUTO_BLOCK | $ip | Score:$score | ${attacks}${NC}" >> "$TEMP_DIR/recent_events"
|
echo -e "${CRITICAL_COLOR}[${time_str}] AUTO_BLOCK | $ip | Score:$score | ${attacks}${NC}" >> "$TEMP_DIR/recent_events"
|
||||||
|
|
||||||
# Block for 1 hour
|
# Get detailed block reason
|
||||||
block_ip_temporary "$ip" 1 "Auto-block: Critical threat score $score - ${attacks}" >/dev/null 2>&1 &
|
local block_reason="Auto-block: Score=$score Attacks=${attacks}"
|
||||||
|
if [ -f "$TEMP_DIR/block_reason_${ip//\./_}" ]; then
|
||||||
|
local intel_reason=$(cat "$TEMP_DIR/block_reason_${ip//\./_}")
|
||||||
|
block_reason="${block_reason} Intel:${intel_reason}"
|
||||||
|
fi
|
||||||
|
|
||||||
# Update ban count
|
# Block for 1 hour with detailed reason
|
||||||
|
block_ip_temporary "$ip" 1 "$block_reason" >/dev/null 2>&1 &
|
||||||
|
|
||||||
|
# Update ban count and total blocks
|
||||||
ban_count=$((ban_count + 1))
|
ban_count=$((ban_count + 1))
|
||||||
|
TOTAL_BLOCKS=$((TOTAL_BLOCKS + 1))
|
||||||
IP_DATA[$ip]="$score|$hits|$bot_type|$attacks|$ban_count|$rep_score"
|
IP_DATA[$ip]="$score|$hits|$bot_type|$attacks|$ban_count|$rep_score"
|
||||||
fi
|
fi
|
||||||
fi
|
fi
|
||||||
@@ -1307,6 +1720,14 @@ monitor_network_attacks
|
|||||||
detect_distributed_attacks
|
detect_distributed_attacks
|
||||||
auto_mitigation_engine
|
auto_mitigation_engine
|
||||||
|
|
||||||
|
# Reputation decay engine (runs every 30 min)
|
||||||
|
(
|
||||||
|
while true; do
|
||||||
|
sleep $DECAY_CHECK_INTERVAL
|
||||||
|
apply_reputation_decay
|
||||||
|
done
|
||||||
|
) &
|
||||||
|
|
||||||
# Periodic snapshot saving in background
|
# Periodic snapshot saving in background
|
||||||
(
|
(
|
||||||
while true; do
|
while true; do
|
||||||
|
|||||||
Reference in New Issue
Block a user