""ET TROJAN Troj_Yahoya Variant CnC Checkin""

SID: 2037233

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_06_30, deployment Perimeter, deployment SSLDecrypt, malware_family Troj_Yahoya, performance_impact Low, signature_severity Major, updated_at 2022_06_30

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "GET"

  • Value: "/id|3f 3d|NT|28|Win"

  • Value: "x64|29 5f|AV|28|"

  • Value: "|29 7c 7c|QN|28|"

  • Value: "|29 7c 7c|WN|28|"

  • Value: "|29 7c 7c|HN|28|"

  • Value: "|29 7c 7c|MA|28|"

  • Value: "|29 7c 7c|WF|28|"

  • Value: "|29 7c 7c|VE|28|"

  • Value: !"User-Agent|3a 20|"

  • Value: !"Referer|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_uri

  • http_header

  • http_header

source