Rule History

SID: 2037020 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 1 • Jun 15, 2022, 12:00 PM

Message:

ET MALWARE Suspected Cobalt Strike Beacon User-Agent String

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Cobalt Strike Beacon User-Agent String"; flow:established,to_server; http.user_agent; content:"Mozilla/5.0 |28|compatible|3b 20|MSIE 9.0|3b 20|Windows NT 6.1|3b 20|Trident/5.0|3b 20|NP07|3b 20|NP07|29|"; reference:url,github.com/sophoslabs/IoCs/blob/master/Troj-Miner-AED.csv; classtype:trojan-activity; sid:2037020; rev:1; metadata:attack_target Client_and_Server, created_at 2022_06_15, deployment Perimeter, malware_family CobaltStrike, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_15;)

Created:

Jun 15, 2022, 12:00 PM

Updated:

Jun 15, 2022, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

Sep 2, 2025, 9:35 PM

Filename:

rules/emerging-malware.rules