Detection rules › Sigma
Use NTFS Short Name in Image
Detect use of the Windows 8.3 short name. Which could be used as a method to avoid Image based detection
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Evasion | T1564.004 Hide Artifacts: NTFS File Attributes |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
| Security-Auditing | 4688 | A new process has been created. |
Stages and Predicates
Stage 1: selection
or:
Image|contains: '~1.bat'
Image|contains: '~1.dll'
Image|contains: '~1.exe'
Image|contains: '~1.hta'
Image|contains: '~1.js'
Image|contains: '~1.msi'
Image|contains: '~1.ps1'
Image|contains: '~1.tmp'
Image|contains: '~1.vbe'
Image|contains: '~1.vbs'
Image|contains: '~2.bat'
Image|contains: '~2.dll'
Image|contains: '~2.exe'
Image|contains: '~2.hta'
Image|contains: '~2.js'
Image|contains: '~2.msi'
Image|contains: '~2.ps1'
Image|contains: '~2.tmp'
Image|contains: '~2.vbe'
Image|contains: '~2.vbs'
Stage 2: not 1 of filter_main_generic_parent
ParentImage: 'C:\Windows\explorer.exe'
Stage 3: not 1 of filter_optional_*
or:
Image|endswith: '\VCREDI~1.EXE'
Image: 'C:\PROGRA~1\WinZip\WZPREL~1.EXE'
ParentImage|endswith: '\WebEx\WebexHost.exe'
ParentImage|endswith: '\thor\thor64.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 |
|---|---|---|
Image | ends_with |
|
Image | eq |
|
Image | match |
|
ParentImage | ends_with |
|
ParentImage | eq |
|