""ET TROJAN Bitter APT CHM CnC Activity (GET) M1""

SID: 2038820

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2022_09_01, deployment Perimeter, malware_family Sidewinder, signature_severity Major, updated_at 2023_03_01

Reference:

  • md5

  • 16696b82884de21b3ef5a3b27872d53c

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?st=" Depth: 16 Offset: 10

  • Value: "|2a|"

  • Value: "User-Agent|3a 20|Windows|20|Installer|0d 0a|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_header

source