""ET TROJAN Waledac Beacon Traffic Detected""

SID: 2008958

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2010_07_30, deployment Perimeter, signature_severity Major, tag c2, updated_at 2010_09_16, 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: to_server,established

Contents:

  • Value: "POST" Depth: 4

  • Value: "Referer|3a| Mozilla|0d 0a|"

  • Value: "User-Agent|3a| Mozilla|0d 0a|"

  • Value: "a="

Within:

PCRE:

Special Options:

  • http_method

  • nocase

  • http_header

  • http_header

  • nocase

  • http_client_body

source