CmdID / Rules / Windows

Potential Defense Evasion Via Right-to-Left Override

A Sigma rule for process creation on Windows, by Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux.

high 1 ATT&CK technique

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection:
    CommandLine|contains:
      - '\u202e'
      - '[U+202E]'
      - '‮'
  condition: selection

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux, under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

None of the everyday examples and documented commands on CmdID’s program pages trips it. To see whether a command line does, paste it into CmdID.

ATT&CK

the techniques it is tagged with

T1036.002Masquerading: Right-to-Left Override

Potential Defense Evasion Via Right-to-Left Override

What it looks for

ATT&CK

Other rules for T1036.002 Masquerading: Right-to-Left Override