Sigma rule: Cab File Extraction Via Wusa.EXE From Potentially Suspicious Paths
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-95a39eb178c3, updated 2023-11-28T00:00:00.000Z.
Rule
- Title
- Cab File Extraction Via Wusa.EXE From Potentially Suspicious Paths
- Status
- test
- Level
- high
- Author
- Nasreddine Bencherchali (Nextron Systems)
- Date
- 2022-08-05
- Modified
- 2023-11-28
- File
- rules/windows/process_creation/proc_creation_win_wusa_cab_files_extraction_from_susp_paths.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects the execution of the "wusa.exe" (Windows Update Standalone Installer) utility to extract ".cab" files using the "/extract" argument from potentially suspicious paths.
Log source
- product
- windows
- category
- process_creation
Detection
selection_root:
Image|endswith: '\wusa.exe'
CommandLine|contains: '/extract:'
selection_paths:
CommandLine|contains:
- ':\PerfLogs\'
- ':\Users\Public\'
- ':\Windows\Temp\'
- '\Appdata\Local\Temp\'
# - '\Desktop\'
# - '\Downloads\'
condition: all of selection_*False positives (as the rule lists them)
- Unknown
Tags
- attack.execution
Related rules
References
- https://web.archive.org/web/20180331144337/https://www.fireeye.com/blog/threat-research/2018/03/sanny-malware-delivery-method-updated-in-recently-observed-attacks.html
- https://www.echotrail.io/insights/search/wusa.exe/
Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_wusa_cab_files_extraction_from_susp_paths.yml
Sources and licences
SigmaHQ
"Cab File Extraction Via Wusa.EXE From Potentially Suspicious Paths" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_wusa_cab_files_extraction_from_susp_paths.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: Cab File Extraction Via Wusa.EXE From Potentially Suspicious Paths",
entity page, dataset version ref-95a39eb178c3, updated 2023-11-28T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/c74c0390-3e20-41fd-a69a-128f0275a5ea (accessed 2026-11-03).
Underlying source: SigmaHQ rule c74c0390-3e20-41fd-a69a-128f0275a5ea, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.