CmdID

CmdID / Rules / Windows

CodePage Modification Via MODE.COM To Russian Language

A Sigma rule for process creation on Windows, by Joseliyo Sanchez, @Joseliyo_Jstnk.

medium 1 ATT&CK technique

What it looks for

its detection, as SigmaHQ writes it
detection:
  selection_cli:
    CommandLine|contains|all:
      - ' con '
      - ' cp '
      - ' select='
    CommandLine|endswith:
      - '=1251'
      - '=866'
  selection_img:
    - Image|endswith: '\mode.com'
    - OriginalFileName: 'MODE.COM'
  condition: all of 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 Joseliyo Sanchez, @Joseliyo_Jstnk, 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
T1036Masquerading

Other rules for T1036 Masquerading

Potentially Suspicious Execution From Tmp Folder · Interactive Bash Suspicious Children · Suspicious Calculator Usage · Suspicious CodePage Switch Via CHCP · Explorer Process Tree Break · Forfiles.EXE Child Process Masquerading · Potential Fake Instance Of Hxtsr.EXE Executed · CodePage Modification Via MODE.COM · Suspicious MSDT Parent Process · Renamed ZOHO Dctask64 Execution · Renamed Plink Execution · Suspicious Process Start Locations