""ET TROJAN Win32/Cryptbotv2 CnC Activity (POST) M4""

SID: 2054350

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_07_05, deployment Perimeter, malware_family Cryptbot, performance_impact Moderate, confidence High, signature_severity Critical, updated_at 2024_07_05

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: "/upload.php"

  • Value: "filename=|22|"

  • Value: "|2e|bin|22 0d 0a|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/\x2fupload\x2ephp$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source