Detectionhighexperimental
RunMRU Registry Key Deletion
Detects deletion of the RunMRU registry key, which stores the history of commands executed via the Run dialog. In the clickfix techniques, the phishing lures instruct users to open a run dialog through (Win + R) and execute malicious commands. Adversaries may delete this key to cover their tracks after executing commands.
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Launch
Swachchhanda Shrawan Poudel (Nextron Systems)Created Thu Sep 25c11aecef-9c37-45a6-9c07-bc0782f963fdwindows
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 Logic2 selectors
detection:
selection_img:
- Image|endswith: '\reg.exe'
- OriginalFileName: 'reg.exe'
selection_cli:
CommandLine|contains|all:
- ' del'
- '\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
References
MITRE ATT&CK
Tactics
Sub-techniques
Rule Metadata
Rule ID
c11aecef-9c37-45a6-9c07-bc0782f963fd
Status
experimental
Level
high
Type
Detection
Created
Thu Sep 25
Path
rules/windows/process_creation/proc_creation_win_reg_delete_runmru.yml
Raw Tags
attack.defense-evasionattack.t1070.003