Sigma rule: Suspicious Screensaver Binary File Creation

Rule

Title

Suspicious Screensaver Binary File Creation

Status

test

Level

medium

Author

frack113

Date

2021-12-29

Modified

2022-11-08

File

rules/windows/file/file_event/file_event_win_creation_scr_binary_file.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

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

Log source

product

windows

category

file_event

Detection

selection:
    TargetFilename|endswith: '.scr'
filter_generic:
    Image|endswith:
        - '\Kindle.exe'
        - '\Bin\ccSvcHst.exe' # Symantec Endpoint Protection
filter_tiworker:
    # ParentCommandLine: C:\WINDOWS\system32\svchost.exe -k DcomLaunch -p
    Image|endswith: '\TiWorker.exe'
    TargetFilename|endswith: '\uwfservicingscr.scr'
condition: selection and not 1 of filter_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.privilege-escalation
• attack.persistence
• attack.t1546.002

MITRE ATT&CK ids this rule names

• T1546.002

References

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1546.002/T1546.002.md

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_creation_scr_binary_file.yml