Detectionhighexperimental
Potential SSH Tunnel Persistence Install Using A Scheduled Task
Detects the creation of new scheduled tasks via commandline, using Schtasks.exe. This rule detects tasks creating that call OpenSSH, which may indicate the creation of reverse SSH tunnel to the attacker's server.
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Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection_img:
- Image|endswith: '\schtasks.exe'
- OriginalFileName: 'schtasks.exe'
selection_cli_sshd:
CommandLine|contains|all:
- ' /create '
- 'sshd.exe'
- '-f'
selection_cli_ssh:
CommandLine|contains|all:
- ' /create '
- 'ssh.exe'
- '-i'
condition: selection_img and 1 of selection_cli_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Rule Metadata
Rule ID
2daa93a0-a5fb-41c5-8cd8-3c11294bfd1f
Status
experimental
Level
high
Type
Detection
Created
Mon Jul 14
Author
Path
rules/windows/process_creation/proc_creation_win_schtasks_openssh_tunnelling.yml
Raw Tags
attack.privilege-escalationattack.persistenceattack.executionattack.t1053.005attack.command-and-control