""ET TROJAN W32/LetsGo.APT Sleep CnC Beacon""
SID: 2016568
Revision: 1
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2013_03_14, deployment Perimeter, signature_severity Major, tag c2, updated_at 2013_03_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel
Reference:
Protocol: tcp
Source Network: $HOME_NET
Source Port: any
Destination Network: $EXTERNAL_NET
Destination Port: $HTTP_PORTS
Flow: established,to_server
Contents:
- Value: "User-Agent|3a| sleep "
Within:
PCRE: "/User-Agent\x3a\x20sleep \d+[\r\x2c]/H"
Special Options:
- http_header