Sigma rule: Small Sieve Malware Registry Persistence

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-b98d2d9b595f, updated 2023-08-17T00:00:00.000Z.

Rule

Title
Small Sieve Malware Registry Persistence
Status
test
Level
high
Author
Nasreddine Bencherchali (Nextron Systems)
Date
2023-05-19
Modified
2023-08-17
File
rules-emerging-threats/2021/Malware/Small-Sieve/registry_set_malware_small_sieve_evasion_typo.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects registry value with specific intentional typo and strings seen used by the Small Sieve malware

Log source

product
windows
category
registry_set

Detection

selection_path:
    TargetObject|contains: '\Microsoft\Windows\CurrentVersion\Run\'
selection_value:
    - TargetObject|contains: 'Microsift'
    - Details|contains: '.exe Platypus'
condition: all of selection_*

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.persistence
  • detection.emerging-threats

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-emerging-threats/2021/Malware/Small-Sieve/registry_set_malware_small_sieve_evasion_typo.yml

Sources and licences

  • SigmaHQ

    "Small Sieve Malware Registry Persistence" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Malware/Small-Sieve/registry_set_malware_small_sieve_evasion_typo.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: Small Sieve Malware Registry Persistence",
entity page, dataset version ref-b98d2d9b595f, updated 2023-08-17T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/65c6e3c1-fb28-4c03-a51e-84919d8185f1 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 65c6e3c1-fb28-4c03-a51e-84919d8185f1, 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.