Rule History

SID: 2032318 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 3 • Mar 24, 2021, 12:00 PM

Message:

ET MALWARE Suspected Jobcrypter Ransomware Exfil (SMTP)

Rule:

alert smtp any any -> any any (msg:"ET MALWARE Suspected Jobcrypter Ransomware Exfil (SMTP)"; flow:established,to_server; content:"|0d 0a|RTEE="; fast_pattern; content:"RRRTC|3a 20|"; distance:0; pcre:"/^[0-9]{90,180}\r\n/R"; reference:md5,4de76198ea4488eae192d0ca4e4bd66b; reference:url,twitter.com/guelfoweb/status/1374042649322209283; classtype:trojan-activity; sid:2032318; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_03_24, deployment Perimeter, confidence Medium, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_07, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)

Created:

Mar 24, 2021, 12:00 PM

Updated:

Aug 7, 2023, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 12, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules