Versions (4)
Version DetailsCurrent
Rev: 1 • May 18, 2021, 12:00 PMET MALWARE Observed DecryptmyFiles Ransomware User-Agent (uniquesession)
alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DecryptmyFiles Ransomware User-Agent (uniquesession)"; flow:established,to_server; http.user_agent; content:"uniquesession"; bsize:13; fast_pattern; reference:md5,0e61e496fc218c1c6dc1f5640a3ac7e5; classtype:trojan-activity; sid:2032995; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_05_18, deployment Perimeter, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_05_18, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)
May 18, 2021, 12:00 PM
May 18, 2021, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 11, 2025, 9:34 PM
rules/emerging-malware.rules