""ET TROJAN Win32/Backdoor.Randrew.A CnC Checkin""

SID: 2025145

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 2017_12_11, deployment Perimeter, malware_family Randrew_A, performance_impact Low, signature_severity Major, updated_at 2017_12_11

Reference:

  • md5

  • 344c04216840312cad17b6610b723825

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: ".aspx?A="

  • Value: "Accept-Language|3a 20|zh-TW"

  • Value: !"Referer|3a 20|"

  • Value: !"Cache"

Within:

PCRE: "/.aspx\?A=[A-Z0-9-]{30,42}$/U"

Special Options:

  • http_method

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

source