HackTool - Jlaive In-Memory Assembly Execution
A Sigma rule for process creation on Windows, by Jose Luis Sanchez Martinez (@Joseliyo_Jstnk).
medium 1 ATT&CK technique 5 programs it names
What it looks for
detection:
parent_selection:
ParentCommandLine|endswith: '.bat'
ParentImage|endswith: '\cmd.exe'
selection1:
CommandLine|contains|all:
- 'powershell.exe'
- '.bat.exe'
Image|endswith: '\xcopy.exe'
selection2:
CommandLine|contains|all:
- 'pwsh.exe'
- '.bat.exe'
Image|endswith: '\xcopy.exe'
selection3:
CommandLine|contains|all:
- '+s'
- '+h'
- '.bat.exe'
Image|endswith: '\attrib.exe'
condition: parent_selection and (1 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 Jose Luis Sanchez Martinez (@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.
Programs and files it names
ATT&CK
T1059.003Command and Scripting Interpreter: Windows Command Shell