""ET TROJAN MSIL/Karmen Ransomware CnC Activity""

SID: 2024239

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_03_15, deployment Perimeter, malware_family Karmen_Ransomware, signature_severity Major, tag Ransomware, updated_at 2018_05_17, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 05427ed1c477cc01910eb9adbf35068d

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: "data.php?id="

• Value: !"User-Agent|3a|"

• Value: !"Accept"

• Value: !"Referer|3a|"

Within:

PCRE: "/^Host\x3a\x20[^\r\n]+\r\n(?:Connection\x3a\x20Keep-Alive\r\n)?\r\n$/Hmi"

Special Options:

• http_method

• http_uri

• fast_pattern

• http_header

• http_header

• http_header

source