Rule History

SID: 2016568 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 4 • Mar 14, 2013, 12:00 PM

Message:

ET MALWARE W32/LetsGo.APT Sleep CnC Beacon

Rule:

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/LetsGo.APT Sleep CnC Beacon"; flow:established,to_server; http.uri; pcre:"/\.html\?[0-9]{10}$/"; http.user_agent; content:"sleep|20|"; fast_pattern; startswith; pcre:"/^sleep \d+[\r\x2c]/"; reference:url,www.fireeye.com/blog/technical/targeted-attack/2013/03/the-dingo-and-the-baby.html; classtype:targeted-activity; sid:2016568; rev:4; metadata:attack_target Client_Endpoint, created_at 2013_03_14, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_18, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)

Created:

Mar 14, 2013, 12:00 PM

Updated:

Sep 18, 2020, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-malware.rules