""ET CURRENT_EVENTS Nemucod JS Downloader June 12 2017""

SID: 2024380

Revision: 1

Class Type: trojan-activity

Metadata: affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_06_13, deployment Perimeter, malware_family Nemucod, performance_impact Low, signature_severity Major, tag WS_JS_Downloader, updated_at 2017_06_13

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: "Accept|3a 20 2a 2f 2a 0d 0a|Accept-Language|3a|" Depth: 29

  • Value: "Firefox/51.0"

  • Value: !"Referer|3a|"

  • Value: !"Cookie|3a|"

Within:

PCRE: "/\/[A-Za-z0-9]{5,7}\?+[A-Za-z0-9]{6,12}=[A-Za-z0-9]{6,12}$/U"

Special Options:

  • http_header

  • http_header

  • fast_pattern

  • http_header

source