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Newest: 2.0.2
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Active Rule
Potential Privilege Escalation Using Symlink Between Osk and Cmd
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential Privilege Escalation Using Symlink Between Osk and Cmd
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Potential Privilege Escalation Using Symlink Between Osk and Cmd
id: e9b61244-893f-427c-b287-3e708f321c6b
status: test
description: Detects the creation of a symbolic link between "cmd.exe" and the accessibility on-screen keyboard binary (osk.exe) using "mklink". This technique provides an elevated command prompt to the user from the login screen without the need to log in.
references:
- https://github.com/redcanaryco/atomic-red-team/blob/5c1e6f1b4fafd01c8d1ece85f510160fc1275fbf/atomics/T1546.008/T1546.008.md
- https://ss64.com/nt/mklink.html
author: frack113
date: 2022-12-11
modified: 2022-12-20
tags:
- attack.privilege-escalation
- attack.persistence
- attack.t1546.008
logsource:
product: windows
category: process_creation
detection:
selection_img:
- Image|endswith: '\cmd.exe'
- OriginalFileName: 'Cmd.Exe'
selection_cli:
CommandLine|contains|all:
- 'mklink'
- '\osk.exe'
- '\cmd.exe'
condition: all of selection_*
falsepositives:
- Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_cmd_mklink_osk_cmd/info.yml
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/process_creation/proc_creation_win_cmd_mklink_osk_cmd.yml