Detection rules › Sigma
Sysprep on AppData Folder
Detects suspicious sysprep process start with AppData folder as target (as used by Trojan Syndicasec in Thrip report by Symantec)
Known false positives
- False positives depend on scripts and administrative tools used in the monitored environment
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution |
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: Sysprep on AppData Folder
id: d5b9ae7a-e6fc-405e-80ff-2ff9dcc64e7e
status: test
description: Detects suspicious sysprep process start with AppData folder as target (as used by Trojan Syndicasec in Thrip report by Symantec)
references:
- https://www.symantec.com/blogs/threat-intelligence/thrip-hits-satellite-telecoms-defense-targets
- https://app.any.run/tasks/61a296bb-81ad-4fee-955f-3b399f4aaf4b
author: Florian Roth (Nextron Systems)
date: 2018-06-22
modified: 2021-11-27
tags:
- attack.execution
- attack.t1059
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith: '\sysprep.exe'
CommandLine|contains: '\AppData\'
condition: selection
falsepositives:
- False positives depend on scripts and administrative tools used in the monitored environment
level: medium
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Image|endswith: '\sysprep.exe'
CommandLine|contains: '\AppData\'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"\AppData\" |
Image | ends_with |
| field:"Image" kind:ends_with value:"\sysprep.exe" |