""ET TROJAN YAHOOYLO Stealer CnC Exfil""

SID: 2030648

Revision: 2

Class Type: trojan-activity

Metadata: attack_target Client_Endpoint, created_at 2020_08_05, deployment Perimeter, deployment SSLDecrypt, malware_family YAHOOYLO, performance_impact Low, signature_severity Major, tag Stealer, updated_at 2020_08_05

Reference:

  • md5

  • 437e3fb3c14f32644df9c6168ca4fa2c

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: ".php"

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

  • Value: "|50 4b 03 04|" Depth: 4

  • Value: "Information.txt"

  • Value: "=Hardware Info==========================|0d 0a|Username|3a 20|"

Within:

PCRE:

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_client_body

  • http_client_body

  • http_client_body

  • fast_pattern

source