Detection rules › Sigma
HackTool - CrackMapExec PowerShell Obfuscation
The CrachMapExec pentesting framework implements a PowerShell obfuscation with some static strings detected by this rule.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.001 Command and Scripting Interpreter: PowerShell |
| Defense Evasion | T1027.005 Obfuscated Files or Information: Indicator Removal from Tools |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: all of selection_img
or:
Image|endswith: '\powershell.exe'
Image|endswith: '\pwsh.exe'
OriginalFileName: PowerShell.EXE
OriginalFileName: pwsh.dll
Stage 2: all of selection_cli
or:
CommandLine|contains: '( $PSHome[*]+$PSHOME[*]+'
CommandLine|contains: '( $ShellId[1]+$ShellId[13]+''x'')'
CommandLine|contains: '( $env:ComSpec[4,*,25]-Join'''')'
CommandLine|contains: '( $env:Public[13]+$env:Public[5]+''x'')'
CommandLine|contains: '[1,3]+''x''-Join'''')'
CommandLine|contains: 'join*split'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
CommandLine | match |
|
Image | ends_with |
|
OriginalFileName | eq |
|