""ET TROJAN Win32/TrickBot maserv Module Command""

SID: 2031600

Revision: 2

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_02_02, deployment Perimeter, malware_family TrickBot, signature_severity Major, updated_at 2021_02_02

Reference:

  • md5

  • ff57c02b09cd9df4d1cac5090e01a5d2

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: to_server,established

Contents:

  • Value: "GET"

  • Value: "/mass/" Depth: 30

  • Value: "Content-Type|3a 20|application/x-www-form-urlencoded|0d 0a|"

  • Value: !"Referer|3a 20|"

Within:

PCRE: "/\/mass\/(?:81|freq|domains|over|rate|npcap.exe)\/?\s[^\/]$/Usi"

Special Options:

  • http_method

  • fast_pattern

  • http_uri

  • http_header

  • http_header

source