""ET TROJAN DCRAT Checkin via Telegram""

SID: 2043288

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_01_12, deployment Perimeter, deployment SSLDecrypt, malware_family DCRat, performance_impact Low, signature_severity Major, updated_at 2023_01_12

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "/bot" Depth: 4

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

  • Value: "caption|3d e2 9d 95 20|User|20|connected|20 e2 9d 95|"

  • Value: "|e2 80 a2 20|ID|3a 20|"

  • Value: "|0a e2 80 a2 20|Comment|3a 20|"

  • Value: "|0a 0a e2 80 a2 20|User|20|Name|3a 20|"

  • Value: "|0a e2 80 a2 20|PC|20|Name|3a 20|"

  • Value: "|0a e2 80 a2 20|OS|20|Info|3a 20|"

  • Value: "|0a e2 80 a2 20|IP|3a 20|"

  • Value: "|0a e2 80 a2 20|GEO|3a 20|"

  • Value: "|e2 80 a2 20|Working|20|Directory|3a 20|"

  • Value: "api.telegram.org"

Within: 100

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

Special Options:

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

source