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

SID: 2024320

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_05_18, deployment Perimeter, malware_family Ransomware, malware_family EasyLocker, signature_severity Major, tag Ransomware, updated_at 2017_05_18, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact

Reference:

• md5

• 980342a5a783d7f6ce188c575d9ca97a

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: "Host|3a 20|noobcrypt"

• Value: !"Referer|3a|"

Within:

PCRE: "/\/(?:countdown|check)\/[a-f0-9]{30,45}\/(?:[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3})?$/Ui"

Special Options:

• http_method

• fast_pattern

• http_header

• http_header

source