""ET TROJAN Likely Geodo/Emotet CnC Beacon""

SID: 2035045

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_03_17, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_04_28, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 6c4d198794d1afd2b8bbae6f16bdfaa7

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: "/" Depth: 3 Offset: 9

  • Value: !"Accept-"

  • Value: !"Referer|3a|"

  • Value: !"Content-Type"

  • Value: "User-Agent|3a 20|Mozilla/5.0 (compatible|3b| MSIE 9.0|3b| Windows NT 7.1|3b| Trident/5.0|29 0d 0a|"

Within:

PCRE: "/^\/-?[a-f0-9]{8,9}\/-?\d+(?:.php|\/)$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

  • http_header

source