Detection rules › Sigma
Cscript/Wscript Uncommon Script Extension Execution
Detects Wscript/Cscript executing a file with an uncommon (i.e. non-script) extension
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1059.005 Command and Scripting Interpreter: Visual Basic, T1059.007 Command and Scripting Interpreter: JavaScript |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 1 | Process creation |
Stages and Predicates
Stage 1: all of selection_img
or:
Image|endswith: '\cscript.exe'
Image|endswith: '\wscript.exe'
OriginalFileName: cscript.exe
OriginalFileName: wscript.exe
Stage 2: all of selection_extension
or:
CommandLine|contains: .csv
CommandLine|contains: .dat
CommandLine|contains: .doc
CommandLine|contains: .gif
CommandLine|contains: .jpeg
CommandLine|contains: .jpg
CommandLine|contains: .png
CommandLine|contains: .ppt
CommandLine|contains: .txt
CommandLine|contains: .xls
CommandLine|contains: .xml
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 |
|