
title: Ursnif
author: megan201296
date: 2019/02/13
description: Detects new registry key created by Ursnif malware.
detection:
  SELECTION_1:
    EventID: 12
  SELECTION_2:
    EventID: 13
  SELECTION_3:
    EventID: 14
  SELECTION_4:
    TargetObject: '*\Software\AppDataLow\Software\Microsoft\\*'
  SELECTION_5:
    TargetObject:
    - '*\SOFTWARE\AppDataLow\Software\Microsoft\Internet Explorer\\*'
    - '*\SOFTWARE\AppDataLow\Software\Microsoft\RepService\\*'
    - '*\SOFTWARE\AppDataLow\Software\Microsoft\IME\\*'
    - '*\SOFTWARE\AppDataLow\Software\Microsoft\Edge\\*'
  condition: ((SELECTION_1 or SELECTION_2 or SELECTION_3) and SELECTION_4 and  not
    (SELECTION_5))
falsepositives:
- Unknown
id: 21f17060-b282-4249-ade0-589ea3591558
level: critical
logsource:
  category: registry_event
  product: windows
modified: 2021/11/15
references:
- https://blog.yoroi.company/research/ursnif-long-live-the-steganography/
- https://blog.trendmicro.com/trendlabs-security-intelligence/phishing-campaign-uses-hijacked-emails-to-deliver-ursnif-by-replying-to-ongoing-threads/
status: experimental
tags:
- attack.execution
- attack.t1112
ruletype: SIGMA
