Read Contents From Stdin Via Cmd.EXE

A Sigma rule for process creation on Windows, by frack113, Nasreddine Bencherchali (Nextron Systems).

medium 1 ATT&CK technique 1 program it names 2 everyday examples trip it

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_cli:
    CommandLine|contains: '<'
  selection_cmd:
    - OriginalFileName: 'Cmd.Exe'
    - Image|endswith: '\cmd.exe'
  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 frack113, Nasreddine Bencherchali (Nextron Systems), 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.

Command lines that trip it

everyday examples from tldr-pages, CC BY 4.0, each read by CmdID

To change the default directory on a drive that is different from the one you are on on the page for cd

cd [<drive>:[<directory>]]Identify

To verify the change to the directory, type on the page for cd

cd [<drive>:]Identify

The commands LOLBAS or GTFOBins documents for cmd.exe trip it too: each is on its program’s page, read by CmdID.

Programs and files it names

their pages here

cmd.exe

ATT&CK

the techniques it is tagged with

T1059.003Command and Scripting Interpreter: Windows Command Shell

Read Contents From Stdin Via Cmd.EXE

What it looks for

Command lines that trip it

Programs and files it names

ATT&CK

Other rules for T1059.003 Command and Scripting Interpreter: Windows Command Shell