Detection rules › Sigma
Potentially Suspicious Execution From Parent Process In Public Folder
Detects a potentially suspicious execution of a parent process located in the "\Users\Public" folder executing a child process containing references to shell or scripting binaries and commandlines.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059 Command and Scripting Interpreter |
| Defense Evasion | T1564 Hide Artifacts |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: all of selection_parent
ParentImage|contains: ':\Users\Public\'
Stage 2: all of selection_child
or:
CommandLine|contains: bitsadmin
CommandLine|contains: certutil
CommandLine|contains: cscript
CommandLine|contains: mshta
CommandLine|contains: powershell
CommandLine|contains: regsvr32
CommandLine|contains: rundll32
CommandLine|contains: wscript
Image|endswith: '\bitsadmin.exe'
Image|endswith: '\certutil.exe'
Image|endswith: '\cmd.exe'
Image|endswith: '\cscript.exe'
Image|endswith: '\mshta.exe'
Image|endswith: '\powershell.exe'
Image|endswith: '\pwsh.exe'
Image|endswith: '\regsvr32.exe'
Image|endswith: '\rundll32.exe'
Image|endswith: '\wscript.exe'
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 |
|
ParentImage | match |
|