""ET TROJAN Win32/Cryptbot CnC Activity (POST)""

SID: 2046886

Revision: 1

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2023_07_24, deployment Perimeter, malware_family Cryptbot, signature_severity Major, tag Stealer, updated_at 2023_07_24

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: "/zip.php"

  • Value: "Content|2d|Disposition|3a 20|form|2d|data|3b 20|name|3d 22|file|22 3b 20|filename|3d 22|"

  • Value: "|2e|zip|22|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/^Content-Type\x3a\x20[^\r\n]+\r\nUser-Agent\x3a\x20[^\r\n]+\r\nHost\x3a\x20[^\r\n]+\r\n/H"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_client_body

  • http_client_body

  • http_header

source