Suspicious Scheduled Task Launching rundll32 DLL via Ransomware

ATT&CK techniques

Execution → Priv Esc

Recon
Resource Dev
Initial Access
Execution
- T1053.005Scheduled Task
- T1059.001PowerShell
Persistence
- T1053.005Scheduled Task
Priv Esc
- T1053.005Scheduled Task
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects schtasks creating a task that periodically executes rundll32 against a DLL as observed in ransomware persistence and re execution routines. Attackers schedule loader DLLs to survive reboots and re trigger their payload on a recurring interval.

Reporting behind it

Related detections9 linkedT1053.005 — drag to rearrange

Suspicious Scheduled Task Creation in Public Writable Directory via schtasks (via process_creation)

Suspicious Scheduled Task Executing Payload from AppData

Suspicious Scheduled Task Running PowerShell Every Minute (via process_creation)

Scheduled Task Creating Per-Minute Hidden PowerShell Execution

Windows Process Creation: schtasks.exe Creating Scheduled Task Launching Registry-Stored PowerShell Payload

Windows Task Scheduler persistence using svchost-launched PowerShell with hidden/Bypass flags

Windows schtasks.exe Create Executes File from AppData\Local

Windows schtasks Creates Registry-Backed Base64 PowerShell Payload via Encoded Command

Windows ChromeLoader Execution via Scheduled Task and Hidden PowerShell Launch

Suspicious Scheduled Task Launching rundll32 DLL via Ransomware

Pivot detection · T1053.005 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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