Rule History

SID: 2035508 • Source: et/open

Versions (5)

Version DetailsCurrent

Rev: 2 • Mar 17, 2022, 12:00 PM

Message:

ET MALWARE Cobalt Strike Activity (GET)

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Activity (GET)"; flow:established,to_server; http.request_line; content:"GET /s/2MYmbwpSJLZRAtXRgNTAUjJSH6SSoicLPIrQl/field-keywords/"; startswith; fast_pattern; http.cookie; content:"PREF=ID="; startswith; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,aa5e8268e741346c76ebfd1f27941a14; reference:url,cert.gov.ua/article/37704; classtype:trojan-activity; sid:2035508; rev:2; metadata:created_at 2022_03_17, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_17;)

Created:

Mar 17, 2022, 12:00 PM

Updated:

Mar 17, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 4, 2025, 9:34 PM

Filename:

rules/emerging-malware.rules