""ET TROJAN Win32/Unknown Stealer CnC Exfil via Telegram M2""

SID: 2044599

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_14, deployment Perimeter, deployment SSLDecrypt, signature_severity Major, updated_at 2023_03_15

Reference:

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: "caption|3d 0a 2a 2a 2a 20|"

  • Value: "host|3a 20|api.telegram.org|0d 0a|"

  • Value: "|50 4b|" Depth: 2

  • Value: "files.zip|50 4b|"

  • Value: "CompleteClose.jpg"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • nocase

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source