Sigma detection rules, expert-reviewed

Sysmon FileBlockShredding Policy Violations (Event ID 28) on Windows

Alerts on Sysmon Event ID 28 when file shredding is blocked by the configured shredding policy on Windows.

Windows: Detect Cmd.exe Redirection of Discovery Commands by Ursnif

Flags explorer-launched cmd.exe commands that use /C and redirect output to AppData local temp .bin files.

Windows PowerShell WMI Win32_NTEventlogFile Calls with Event Log Tampering Methods

Flags PowerShell calling Win32_NTEventlogFile WMI methods commonly used to clear, delete, backup, or alter Windows event logs.

Windows Security 5140 File Share Access to MSHTML_C7 IP-Named Paths

Alerts on Windows file share access events targeting \MSHTML_C7\ shares with an IP-like naming pattern (EventID 5140).

Windows Process Creation From Fake Recycle.Bin Directories

Alerts on Windows processes launched from fake RECYCLER.BIN / RECYCLERS.BIN folder paths often used for stealth.

Windows: Suspicious File Creation in Fake RECYCLER.BIN Staging Folders

Alerts on Windows file writes involving RECYCLERS.BIN\ or RECYCLER.BIN\ paths often used for staging.

HTTP GET Requests Containing /MSHTML_C7/ URL Marker (Proxy Logs)

Alerts on proxy HTTP GET requests whose URI contains /MSHTML_C7/.

Proxy GET Requests with IP-Embedded CVE-Related URL Parameters

Finds proxy GET URIs with risky extensions and a d=IPv4 parameter value in the query string.

Windows DLL Sideloading via Abusable DLLs Loaded from Suspicious Locations

Flags Windows module loads of specific abusable DLL names from public, temp, or user folders consistent with potential DLL sideloading.

Windows PowerShell Decryption-Like Activity Involving .LNK File Processing

Identifies PowerShell runs that enumerate and process *.lnk content using byte-level reads/writes consistent with decryption staging.

Windows Registry: Uncommon Microsoft Office Trusted Location Path Added

Alerts on registry changes adding non-standard Microsoft Office Trusted Location paths that could undermine macro security.

Windows Registry TrustRecords Change for Macro-Enabled Documents in Suspicious Paths

Alert on Windows registry changes to Office TrustRecords where trusted-document paths fall in suspicious directories.

Windows: Office Executable Running a Document from Trusted Template/Startup Paths

Alerts when Office apps are launched with command lines pointing to documents under Office template/Startup paths.

Windows DLL side-loading via appverifUI.dll image loads

Alerts when appverifUI.dll is loaded on Windows from unexpected paths, a common DLL sideloading technique.

Windows Security 4719: Important Audit Policy Categories Disabled

Alerts on Windows Security 4719 indicating auditing was disabled for important security event subcategories.