""ET TROJAN MSIL/Runsome Ransomware CnC Checkin""

SID: 2024223

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_04_19, deployment Perimeter, malware_family Ransomware, malware_family Runsome, signature_severity Major, tag Ransomware, updated_at 2017_04_19, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

Protocol: tcp

Source Network: $HOME_NET

Source Port: any

Destination Network: $EXTERNAL_NET

Destination Port: $HTTP_PORTS

Flow: established,to_server

Contents:

  • Value: ".php?name="

  • Value: "&key=ENC"

  • Value: "|20|HTTP/1.1|0d 0a|Host|3a|"

  • Value: !"User-Agent|3a|"

  • Value: !"Accept"

  • Value: !"Referer|3a|"

Within:

PCRE: "/.php\?name=[^\r\n]+?&key=ENC[^\r\n]+$/U"

Special Options:

  • http_uri

  • http_uri

  • fast_pattern

  • http_header

  • http_header

  • http_header

source