Sigma rule: Tasks Folder Evasion

Rule

Title

Tasks Folder Evasion

Status

test

Level

high

Author

Sreeman

Date

2020-01-13

Modified

2022-12-25

File

rules/windows/process_creation/proc_creation_win_susp_task_folder_evasion.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

The Tasks folder in system32 and syswow64 are globally writable paths.
Adversaries can take advantage of this and load or influence any script hosts or ANY .NET Application
in Tasks to load and execute a custom assembly into cscript, wscript, regsvr32, mshta, eventvwr

Log source

product

windows

category

process_creation

Detection

selection1:
    CommandLine|contains:
        - 'echo '
        - 'copy '
        - 'type '
        - 'file createnew'
selection2:
    CommandLine|contains:
        - ' C:\Windows\System32\Tasks\'
        - ' C:\Windows\SysWow64\Tasks\'
condition: all of selection*

False positives (as the rule lists them)

• Unknown

Tags

• attack.privilege-escalation
• attack.persistence
• attack.execution
• attack.stealth
• attack.t1574.001

MITRE ATT&CK ids this rule names

• T1574.001

References

• https://twitter.com/subTee/status/1216465628946563073
• https://gist.github.com/am0nsec/8378da08f848424e4ab0cc5b317fdd26

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/process_creation/proc_creation_win_susp_task_folder_evasion.yml