Versions (4)
Version DetailsCurrent
Rev: 1 • Jan 24, 2020, 12:00 PMET MALWARE Mermaid Ransomware Variant CnC Activity M2
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Mermaid Ransomware Variant CnC Activity M2"; flow:established,to_server; urilen:>50; http.method; content:"GET"; http.uri; content:"data.php?info="; fast_pattern; pcre:"/^[A-Za-z0-9\?=]{25,}$/Rsi"; http.user_agent; content:"Mozilla/3.0 (compatible|3b 20|Indy Library)"; bsize:38; http.header_names; content:!"Referer"; reference:md5,b3bc3fe63fad42ae8bcd448b8aec3e3e; classtype:command-and-control; sid:2029320; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_01_24, deployment Perimeter, malware_family Ransomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_24, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)
Jan 24, 2020, 12:00 PM
Jan 24, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 22, 2025, 9:34 PM
rules/emerging-malware.rules