""ET TROJAN Win32/Valak - Plugin Data Exfil""

SID: 2029197

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 2019_12_23, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2019_12_23

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: "bm9uY2UyP"

  • Value: "cGx1Z2luP"

  • Value: ".html"

  • Value: !"Referer"

Within:

PCRE: "/bm9uY2UyP[a-zA-Z0-9\/]{55,}cGx1Z2luP[a-zA-Z0-9\/]+.html$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_uri

  • http_uri

  • http_header

source