Sigma rule: Potential Defense Evasion Via Right-to-Left Override

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-0d1352326f29, updated 2026-03-20T00:00:00.000Z.

Rule

Title
Potential Defense Evasion Via Right-to-Left Override
Status
test
Level
high
Author
Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux
Date
2023-02-15
Modified
2026-03-20
File
rules/windows/process_creation/proc_creation_win_susp_right_to_left_override.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the presence of the "u202+E" character, which causes a terminal, browser, or operating system to render text in a right-to-left sequence.
This character is used as an obfuscation and masquerading techniques by adversaries to trick users into opening malicious files.

Log source

product
windows
category
process_creation

Detection

selection:
    CommandLine|contains:
        - '\u202e'  # Unicode RTLO character
        - '[U+202E]'
        # Real char U+202E copied/pasted below
        - '‮'
condition: selection

False positives (as the rule lists them)

  • Commandlines that contains scriptures such as arabic or hebrew might make use of this character

Tags

  • attack.stealth
  • attack.t1036.002

MITRE ATT&CK ids this rule names

Related rules

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_susp_right_to_left_override.yml

Sources and licences

  • SigmaHQ

    "Potential Defense Evasion Via Right-to-Left Override" by Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_susp_right_to_left_override.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: Potential Defense Evasion Via Right-to-Left Override",
entity page, dataset version ref-0d1352326f29, updated 2026-03-20T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/ad691d92-15f2-4181-9aa4-723c74f9ddc3 (accessed 2026-11-03).
Underlying source: SigmaHQ rule ad691d92-15f2-4181-9aa4-723c74f9ddc3, 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.