""ET TROJAN W32/Symmi.46846 CnC Beacon""

SID: 2019948

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2014_12_16, deployment Perimeter, signature_severity Major, tag c2, updated_at 2014_12_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • fe5dc2a4ee8aa084c9da42cd2d1ded2e

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "POST"

  • Value: "/notify.php"

  • Value: "User-Agent|3A| Mozilla/4.0 (compatible|3B| MyApp)"

  • Value: !"Referer|3A|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

source