""ET TROJAN AlphaCrypt CnC Beacon 6""

SID: 2022300

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2015_12_22, deployment Perimeter, signature_severity Major, tag c2, updated_at 2015_12_22, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel

Reference:

  • md5

  • 66bbfc1e5b027eb48c76078129194015

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: ".php?"

  • Value: "User-Agent|3a 20|Mozilla/5.0 (Windows NT 6.3|3b 20|WOW64|3b 20|Trident/7.0|3b 20|Touch|3b 20|rv|3a|11.0) like Gecko|0d 0a|" Depth: 89

  • Value: !"Accept"

  • Value: !"Referer|3a|"

Within:

PCRE: "/\/[a-z]+.php\?[A-F0-9]{250,}$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

  • http_header

source