""ET CURRENT_EVENTS Malicious JS.Nemucod to PS Dropping PE Nov 14 M2""

SID: 2023754

Revision: 5

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2016_11_28, deployment Perimeter, performance_impact Low, signature_severity Major, updated_at 2017_02_06

Reference:

  • md5

  • 551c440d76be5ab9932d8f3e8f65726e

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: ".php?f="

  • Value: !"Referer"

  • Value: "User-Agent|3a 20|Mozilla/4.0 (compatible|3b 20|MSIE 7.0|3b|"

Within:

PCRE: "/^\/\w+.php\?f=[a-z]?\d{1,3}(?:.(?:dat|gif))?$/U"

Special Options:

  • http_method

  • http_uri

  • http_header

  • http_header

source