Detection rules › Sigma
Suspicious Screensaver Binary File Creation
Adversaries may establish persistence by executing malicious content triggered by user inactivity. Screensavers are programs that execute after a configurable time of user inactivity and consist of Portable Executable (PE) files with a .scr file extension
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | T1546.002 Event Triggered Execution: Screensaver |
| Privilege Escalation | T1546.002 Event Triggered Execution: Screensaver |
Event coverage
| Provider | Event ID | Title |
|---|---|---|
| Sysmon | 11 | FileCreate |
Stages and Predicates
Stage 1: selection
TargetFilename|endswith: .scr
Stage 2: not 1 of filter_*
or:
Image|endswith: '\TiWorker.exe'
TargetFilename|endswith: '\uwfservicingscr.scr'
Image|endswith: '\Bin\ccSvcHst.exe'
Image|endswith: '\Kindle.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 |
|
TargetFilename | ends_with |
|