""ET TROJAN DarkCloud Stealer File Grabber Function Exfiltrating Data via Telegram""

SID: 2044741

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_22, deployment Perimeter, deployment SSLDecrypt, malware_family DarkCloud, performance_impact Low, confidence High, signature_severity Major, updated_at 2023_03_22

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: "/sendDocument?chat_id="

  • Value: "&caption="

  • Value: "DC-FG|3a 3a 3a|"

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

  • Value: "Content-Disposition|3a 20|form-data|3b 20|name|3d 22|document|22 3b 20|filename|3d 22|Files.zip|22|"

  • Value: "|0d 0a 0d 0a|PK"

  • Value: "Files/"

Within: 60

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

source