Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects changes to the registry values related to outlook that indicates that a reminder was triggered for a Note or Task item. This could be a sign of exploitation of CVE-2023-23397. Further investigation is required to determine the success of an exploitation.
Detects the installation of a DNS plugin DLL via ServerLevelPluginDll parameter in registry, which can be used to execute code in context of the DNS server (restart required)
UAC Bypass via Sdclt
Sigma
Detects the pattern of UAC Bypass using registry key manipulation of sdclt.exe (e.g. UACMe 53)
Detects disabling the CrashDump per registry (as used by HermeticWiper)
Detects potential persistence activity via outlook home page.
An attacker can set a home page to achieve code execution and persistence by editing the WebView registry keys.
An attacker can set a home page to achieve code execution and persistence by editing the WebView registry keys.
Detect use of scrobj.dll as this DLL looks for the ScriptletURL key to get the location of the script to execute
Attempts to detect system changes made by Blue Mockingbird
Detects when an attacker tries to add a new network provider in order to dump clear text credentials, similar to how the NPPSpy tool does it
Detects setting a custom URL for OneDriveStandaloneUpdater.exe to download a file from the Internet without executing any
anomalous executables with suspicious arguments. The downloaded file will be in C:\Users\redacted\AppData\Local\Microsoft\OneDrive\StandaloneUpdaterreSignInSettingsConfig.json
anomalous executables with suspicious arguments. The downloaded file will be in C:\Users\redacted\AppData\Local\Microsoft\OneDrive\StandaloneUpdaterreSignInSettingsConfig.json
Detects changes to the "NoLMHash" registry value in order to allow Windows to store LM Hashes.
By setting this registry value to "0" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.
By setting this registry value to "0" (DWORD), Windows will be allowed to store a LAN manager hash of your password in Active Directory and local SAM databases.
Detects registry key established after masqueraded .scr file execution using Rundll32 through desk.cpl
Detects tampering with the "Enabled" registry key in order to disable Windows logging of a Windows event channel
Detects registry changes to Microsoft Office "AccessVBOM" to a value of "1" which disables trust access for VBA on the victim machine and lets attackers execute malicious macros without any Microsoft Office warnings.
Detects modification of autostart extensibility point (ASEP) in registry.
Detects when attackers or tools disable Windows Defender functionalities via the Windows registry
Detects the enabling of the "EnablePeriodicBackup" registry value. Once enabled, The OS will backup System registry hives on restarts to the "C:\Windows\System32\config\RegBack" folder. Windows creates a "RegIdleBackup" task to manage subsequent backups.
Registry backup was a default behavior on Windows and was disabled as of "Windows 10, version 1803".
Registry backup was a default behavior on Windows and was disabled as of "Windows 10, version 1803".
Detects changes to the PowerShell execution policy in order to bypass signing requirements for script execution
Detects the enabling of the Windows Recall feature via registry manipulation. Windows Recall can be enabled by setting the value of "DisableAIDataAnalysis" to "0".
Adversaries may enable Windows Recall as part of post-exploitation discovery and collection activities.
This rule assumes that Recall is already explicitly disabled on the host, and subsequently enabled by the adversary.
Adversaries may enable Windows Recall as part of post-exploitation discovery and collection activities.
This rule assumes that Recall is already explicitly disabled on the host, and subsequently enabled by the adversary.
UAC Disabled
Sigma
Detects when an attacker tries to disable User Account Control (UAC) by setting the registry value "EnableLUA" to 0.
Detects changes to the Netsh registry key to add a new DLL value that is located on a suspicious location. This change might be an indication of a potential persistence attempt by adding a malicious Netsh helper
Detects UAC bypass method using Windows event viewer
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