""ET TROJAN Possible Bitter APT Activity (GET)""

SID: 2044781

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_03_27, deployment Perimeter, malware_family Bitter, signature_severity Major, updated_at 2023_04_04

Reference:

  • md5

  • cce89f4956a5c8b1bec82b21e371645b

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: any

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "id|3d 25|computername|25 3b|timeout"

Within:

PCRE: "/id\x3d\x25computername\x25\x3btimeout$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

source