Sigma detection rules, expert-reviewed
Each one is checked against the reporting it came from before it is published, and shows the ATT&CK technique it covers, the telemetry it needs and where it falls short.
4,449 rules
Suspicious Malformed User-Agent Strings in Proxy Logs
Flags proxy requests whose User-Agent headers are malformed or match suspicious automation/tooling patterns, excluding known Adobe/Acrobat traffic.
Florian Roth (Nextron Systems), Huntrule TeamWebproxyHigh225Free2017-07-08Suspicious Malware User-Agent Strings in Proxy Logs
Alerts on proxy traffic with user-agent values and substrings commonly seen in malware communications.
Florian Roth (Nextron Systems), X__Junior (Nextron Systems), Nasreddine Bencherchali (Nextron Systems), Huntrule TeamWebproxyHigh171Free2017-07-08Proxy logs: Detect suspicious hack tool user agents from known scanning and SQLi tools
Alerts on proxy requests with User-Agent values commonly used by scanners and hack tools, indicating automated probing or exploitation attempts.
Florian Roth (Nextron Systems), Huntrule TeamWebproxyHigh163Free2017-07-08Proxy logs: suspicious exploit framework User-Agent strings
High-severity match on proxy User-Agent strings commonly seen in exploit/pentest frameworks.
Florian Roth (Nextron Systems), Huntrule TeamWebproxyHigh202Free2017-07-08Windows Process Creation: Suspicious Execution of PlugX DLL Side-Loading Utilities from Uncommon Paths
Alerts on execution of PlugX-related helper binaries from atypical paths, excluding common legitimate directories.
Florian Roth (Nextron Systems), Huntrule TeamWindowsprocess_creationHigh241Free2017-06-12Windows Process Creation: Fireball Archer installs via rundll32.exe and InstallArcherSvc
Flags rundll32.exe executions referencing InstallArcherSvc in the process command line on Windows.
Florian Roth (Nextron Systems), Huntrule TeamWindowsprocess_creationHigh152Free2017-06-03Windows Security: Detects RULER workstation using NTLM and login events (Event IDs 4776, 4624/4625)
Alerts when RULER-labeled Windows Security events show NTLM auth (4776) plus 4624/4625 logons.
Florian Roth (Nextron Systems), Huntrule TeamWindowssecurityHigh347Free2017-05-31Windows Registry: DHCP Server Callout DLL and Enable Parameters Installation
Alerts on registry changes enabling and configuring DHCP Server callout DLLs via CalloutDlls and CalloutEnabled.
Dimitrios Slamaris, Huntrule TeamWindowsregistry_setHigh133Free2017-05-15Windows ETW: Kernel-General resets registry hive access bits in temp hive paths
Detects ETW EventID 16 when access bits are reset for Temp \SAM or \SECURITY hives.
Florian Roth (Nextron Systems), Huntrule TeamWindowssystemHigh412Free2017-05-15Windows DHCP Server Error: Callout DLL Failed to Load
Flags DHCP Server events showing failure to load a configured Callout DLL (Event IDs 1031/1032/1034).
Dimitrios Slamaris, @atc_project (fix), Huntrule TeamWindowssystemHigh544Free2017-05-15Windows DHCP Server Loaded Callout DLL via Registry
Flags DHCP Server events where a registry-specified callout DLL is loaded (Event ID 1033), indicating potential persistence or execution.
Dimitrios Slamaris, Huntrule TeamWindowssystemHigh141Free2017-05-15Windows Error Reporting: MsMpEng.exe Crash with mpengine.dll
Alerts on WER EventID 1001 crashes where MsMpEng.exe and mpengine.dll appear in the event data.
Florian Roth (Nextron Systems), Huntrule TeamWindowsapplicationHigh141Free2017-05-09Windows Application Error: MsMpEng.exe Crash Involving mpengine.dll
Alerts on Windows Application Error EventID 1000 indicating a crash involving MsMpEng.exe and mpengine.dll.
Florian Roth (Nextron Systems), Huntrule TeamWindowsapplicationHigh213Free2017-05-09Windows DNS ServerLevelPluginDll Registry Installation
Detects registry changes setting DNS ServerLevelPluginDll, which can enable malicious DNS plugin DLL loading after restart.
Florian Roth (Nextron Systems), Huntrule TeamWindowsregistry_setHigh465Free2017-05-08Windows: Detect dnscmd.exe setting ServerLevelPluginDll to install DNS plugin DLL
Flags dnscmd.exe DNS configuration that sets ServerLevelPluginDll, indicating potential malicious DNS server code injection.
Florian Roth (Nextron Systems), Huntrule TeamWindowsprocess_creationHigh163Free2017-05-08