""ET TROJAN W32/Asprox php.dll.crp POST CnC Beacon""
SID: 2016527
Revision: 4
Class Type: trojan-activity
Metadata: attack_target Client_Endpoint, created_at 2013_03_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_02_02, 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: "POST " Depth: 5
-
Value: "|0d 0a 0d 0a|id="
-
Value: "&code="
-
Value: "&data="
Within:
PCRE: "/^POST \x2F[a-f0-9]{40,60}\x20/i"
Special Options:
- fast_pattern