""ET TROJAN Win32/NewsRat CnC Exfil via Telegram (POST)""

SID: 2047716

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_08_23, deployment Perimeter, deployment SSLDecrypt, signature_severity Critical, updated_at 2023_08_23, reviewed_at 2023_08_23

Reference:

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: "/bot" Depth: 4

  • Value: "|2f|sendDocument|3f|chat|5f|id|3d|"

  • Value: "api.telegram.org"

  • Value: "filename|3d 22|C|3a 5c|ProgramData|5c|Time"

  • Value: "|50 4b 03 04|"

  • Value: "chomeDefault.txt"

  • Value: "cookies_fb.txt"

  • Value: "edgeDefault.txt"

Within:

PCRE: "/Host\x3a\x20[^\r\n]+api.telegram.org/H"

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

  • http_client_body

source