Detection rules › Sigma
Rorschach Ransomware Execution Activity
Detects Rorschach ransomware execution activity
Known false positives
- Unlikely
MITRE ATT&CK coverage
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Rorschach Ransomware Execution Activity
id: 0e9e6c63-1350-48c4-9fa1-7ccb235edc68
status: test
description: Detects Rorschach ransomware execution activity
references:
- https://research.checkpoint.com/2023/rorschach-a-new-sophisticated-and-fast-ransomware/
author: X__Junior (Nextron Systems)
date: 2023-04-04
modified: 2023-04-22
tags:
- attack.execution
- attack.t1059.003
- attack.t1059.001
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\bcdedit.exe'
- '\net.exe'
- '\net1.exe'
- '\netsh.exe'
- '\wevtutil.exe'
- '\vssadmin.exe'
CommandLine|contains: '11111111'
condition: selection
falsepositives:
- Unlikely
level: critical
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith:
- '\bcdedit.exe'
- '\net.exe'
- '\net1.exe'
- '\netsh.exe'
- '\wevtutil.exe'
- '\vssadmin.exe'
CommandLine|contains: '11111111'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"11111111" |
Image | ends_with |
| field:"Image" kind:ends_with |