WINEKEY Registry Modification

Hunt Hypothesis

Detects potential malicious modification of run keys by winekey or team9 backdoor

Detection Rule

Sigma (Original)

title: WINEKEY Registry Modification
id: b98968aa-dbc0-4a9c-ac35-108363cbf8d5
status: test
description: Detects potential malicious modification of run keys by winekey or team9 backdoor
references:
    - https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
author: omkar72
date: 2020-10-30
modified: 2021-11-27
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547
logsource:
    category: registry_event
    product: windows
detection:
    selection:
        TargetObject|endswith: 'Software\Microsoft\Windows\CurrentVersion\Run\Backup Mgr'
    condition: selection
falsepositives:
    - Unknown
level: high

KQL (Azure Sentinel)

imRegistry
| where RegistryKey endswith "Software\\Microsoft\\Windows\\CurrentVersion\\Run\\Backup Mgr"

KQL (Microsoft 365 Defender)

DeviceRegistryEvents
| where RegistryKey endswith "Software\\Microsoft\\Windows\\CurrentVersion\\Run\\Backup Mgr"

Required Data Sources

False Positive Guidance

• Unknown

MITRE ATT&CK Context

• Tactic: Privilege Escalation
• Tactic: Persistence
• Technique: T1547 — T1547

References

• https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
• SigmaHQ Rule