""ET TROJAN Matanbuchus Loader CnC M3""

SID: 2034468

Revision: 3

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_11_16, deployment Perimeter, signature_severity Major, updated_at 2021_11_18, 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,44413]

Flow: established,to_server

Contents:

  • Value: "POST " Depth: 5

  • Value: ".php HTTP/1"

  • Value: !"Referer|3a 20|"

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: "|0d 0a 0d 0a|"

  • Value: !"&"

  • Value: "=ey"

Within: 40

PCRE: "/^[IJKL].*(?:PT0iLC|09Iiwi|9PSIsI)[a-zA-Z0-9+\/]+(?:PT0iLC|09Iiwi|9PSIsI)/R"

Special Options:

  • fast_pattern

source