""ET TROJAN Win32/Limbozar Ransomware Activity (POST)""

SID: 2034195

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2021_10_15, deployment Perimeter, signature_severity Major, tag Ransomware, updated_at 2021_10_15, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

  • md5

  • 91332f289d3e577b57d878b55c5cf18a

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: "/postme"

  • Value: "|0d 0a|from|3a 20|me|0d 0a|"

  • Value: "|0d 0a|user-agent|3a 20|libsfml-network/"

  • Value: "&ip=" Depth: 4

  • Value: "&disk="

  • Value: "&id="

  • Value: "&mail="

  • Value: !"Referer|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • fast_pattern

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_header

source