Known false positives
- UAC bypass method used by other malware
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: DarkSide Ransomware Pattern
id: 965fff6c-1d7e-4e25-91fd-cdccd75f7d2c
status: test
description: Detects DarkSide Ransomware and helpers
references:
- https://www.fireeye.com/blog/threat-research/2021/05/shining-a-light-on-darkside-ransomware-operations.html
- https://app.any.run/tasks/8b9a571b-bcc1-4783-ba32-df4ba623b9c0/
- https://www.joesandbox.com/analysis/411752/0/html#7048BB9A06B8F2DD9D24C77F389D7B2B58D2
author: Florian Roth (Nextron Systems)
date: 2021-05-14
tags:
- attack.execution
- attack.t1204
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection1:
CommandLine|contains:
- '=[char][byte](''0x''+'
- ' -work worker0 -path '
selection2:
ParentCommandLine|contains: 'DllHost.exe /Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}'
Image|contains: '\AppData\Local\Temp\'
condition: 1 of selection*
falsepositives:
- Unknown
- UAC bypass method used by other malware
level: critical
Stages and Predicates
Stage 0: condition
1 of selection*Stage 1: selection1
selection1:
CommandLine|contains:
- '=[char][byte](''0x''+'
- ' -work worker0 -path '
Stage 2: selection2
selection2:
ParentCommandLine|contains: 'DllHost.exe /Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}'
Image|contains: '\AppData\Local\Temp\'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | match |
| field:"Image" kind:match value:"\AppData\Local\Temp\" |
ParentCommandLine | match |
| field:"ParentCommandLine" kind:match value:"DllHost.exe /Processid:{3E5FC7F9-9A51-4367-9063-A120244FBEC7}" |