Query: Sigma rule for Detects attempts to delete the RunMRU registry key, which stores the history of commands executed via the run dialog. In
Matching passage: Sigma rule: Detects attempts to delete the RunMRU registry key, which stores the history of commands executed via the run dialog. In. Logsource: windows / registry_delete. Rule: title: RunMRU Registry Key Deletion - Registry id: 3a9b8c1e-5b2e-4f7a-9d1c-2a7f3b6e1c55 related: - id: c11aecef-9c37-45a6-9c07-bc0782f963fd type: similar status: experimental description: 'Detects attempts to delete 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. ' references: - https://www.zscaler.com/blogs/security-research/coldriver-updates-arsenal-baitswitch-and-simplefix author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-09-25 tags: - attack.stealth - attack.t1070.003 logsource: category: registry_delete product: windows detection: selection: TargetObject|endswith: \Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU condition: selection falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/registry/registry_delete/registry_delete_runmru/info.yml
Near-miss passage: Sigma rule: Detects the creation of potentially malicious script and executable files in Windows startup folders, which is a common. Logsource: windows / file_event. Rule: title: Suspicious Startup Folder Persistence id: 28208707-fe31-437f-9a7f-4b1108b94d2e related: - id: 2aa0a6b4-a865-495b-ab51-c28249537b75 type: similar status: test description: 'Detects the creation of potentially malicious script and executable files in Windows startup folders, which is a common persistence technique used by threat actors. These files (.ps1, .vbs, .js, .bat, etc.) are automatically executed when a user logs in, making the Startup folder an attractive target for attackers. This technique is frequently observed in malvertising campaigns and malware distribution where attackers attempt to maintain long-term access to compromised systems. ' references: - https://github.com/last-byte/PersistenceSniper - https://www.microsoft.com/en-us/security/blog/2025/03/06/malvertising-campaign-leads-to-info-stealers-hosted-on-github/ - https://github.com/redcanaryco/atomic-red-team/blob/5ede8f21e42ebe37e0a6eff757dba60bcfa85859/atomics/T1547.001/T1547.001.md author: Nasreddine Bencherchali (Nextron Systems), Swachchhanda Shrawan Poudel (Nextron Systems) date: 2022-08-10 modified: 2025-10-12 tags: - attack.privilege-escalation - attack.execution - attack.t1204.002 - attack.persistence - attack.t1547.001 logsource: product: windows category: file_event detection: selection: TargetFilename|contains: \Windows\Start Menu\Programs\Startup\ TargetFilename|endswith: - .bat - .cmd - .dll - .hta - .jar - .js - .jse - .msi - .ps1 - .psd1 - .psm1 - .scr - .url - .vba - .vbe - .vbs - .wsf condition: selection falsepositives: - Rare legitimate usage of some of the extensions mentioned in the rule level: high