""ET TROJAN Downloader.Win32.Small CnC Beacon""
SID: 2011269
Revision: 7
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2011_02_08, 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: 81:65535
Flow: established,to_server
Contents:
-
Value: "GET " Depth: 4
-
Value: "User-Agent|3a| MSDN SurfBear|0d 0a|"
Within:
PCRE:
Special Options:
- nocase