Sigma rule: Suspicious Extrac32 Execution

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-468594da750b, updated 2022-08-13T00:00:00.000Z.

Rule

Title
Suspicious Extrac32 Execution
Status
test
Level
medium
Author
frack113
Date
2021-11-26
Modified
2022-08-13
File
rules/windows/process_creation/proc_creation_win_lolbin_extrac32.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Download or Copy file with Extrac32

Log source

product
windows
category
process_creation

Detection

selection_lolbas:
    - CommandLine|contains: extrac32.exe
    - Image|endswith: '\extrac32.exe'
    - OriginalFileName: 'extrac32.exe'
selection_archive:
    CommandLine|contains: '.cab'
selection_options:
    CommandLine|contains:
        - /C
        - /Y
        - ' \\\\'
condition: all of selection_*

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.command-and-control
  • attack.t1105

MITRE ATT&CK ids this rule names

References

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_lolbin_extrac32.yml

Sources and licences

  • SigmaHQ

    "Suspicious Extrac32 Execution" by frack113 (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_lolbin_extrac32.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Suspicious Extrac32 Execution",
entity page, dataset version ref-468594da750b, updated 2022-08-13T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/aa8e035d-7be4-48d3-a944-102aec04400d (accessed 2026-11-03).
Underlying source: SigmaHQ rule aa8e035d-7be4-48d3-a944-102aec04400d, 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.