Detections

Explore public detection logic contributed by the community across SIEM and rule languages.

1,161 detections

Detects activity associated with the Hannibal Stealer, a .NET info-stealer known for targeting cryptocurrency wallets, VPN configurations, and browser data.
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Subhankar H@Shubho57
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Detections.ai Community
11 months ago
3075
Detects potential DLL sideloading activity associated with Cephalus ransomware, where a legitimate SentinelOne executable is launched from a non-standard path and loads a malicious DLL.
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Georg Lauenstein@gsec
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Detections.ai Community
1 year ago
3079
Detects the execution of XWORM malware delivered via the Ghost Crypt crypter service. The attack chain involves a legitimate but vulnerable PDF reader (HaiHaiSoft PDF Reader) side-loading a malicious 'oledlg.dll', which then uses process hypnosis to inject the final XWORM payload into 'csc.exe'. The rule also detects the persistence mechanism used.
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Kaung Khant Ko@kaungkhantko
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Detections.ai Community
1 year ago
11291
This rule detects attempts to abuse Azure Browser Single Sign-On (SSO) by monitoring for the loading of the 'MicrosoftAccountTokenProvider.dll' library. This DLL is involved in requesting OAuth 2.0 refresh tokens for Azure AD-authenticated Windows users on Azure AD-joined machines, enabling SSO in browsers. An attacker could leverage this to authenticate to Azure AD as the compromised user within a browser. The rule filters out legitimate loads by common processes like BackgroundTaskHost.exe, Visual Studio (devenv.exe), Internet Explorer (iexplore.exe), Microsoft Edge (msedge.exe, msedgewebview2.exe), and OneDrive (OneDrive.exe) to reduce false positives.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
1066
Detects potential exploitation of remote code execution vulnerability CVE-2025-33053 by monitoring suspicious image loads from WebDAV paths. The exploit involves malicious executables from attacker-controlled WebDAV servers loading Windows system DLLs like gdi32.dll, netapi32.dll, etc.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0051
Detects potential DLL sideloading activity via the Aruba Networks Virtual Intranet Access "arubanetsvc.exe" process. This rule specifically looks for the arubanetsvc.exe process loading specific DLLs (wtsapi32.dll, msvcr100.dll, msvcp100.dll, dbghelp.dll, dbgcore.dll, wininet.dll, iphlpapi.dll, version.dll, cryptsp.dll, cryptbase.dll, wldp.dll, profapi.dll, sspicli.dll, winsta.dll, dpapi.dll) from a location other than the standard Windows system directories (C:\Windows\System32\, C:\Windows\SysWOW64\, C:\Windows\WinSxS\). This behavior is indicative of DLL Search Order Hijacking, where an attacker places a malicious DLL in a directory that is searched before the legitimate system DLLs, causing the application to load the malicious version.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
6044
Detects the loading of the "taskschd.dll" module from a process that is located in a potentially suspicious or uncommon directory. The loading of this DLL might indicate that the application has the capability to create a scheduled task via the "Schedule.Service" COM object. Investigation of the loading application and its behavior is required to determine if it is malicious.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
2037
This rule detects when a ClickOnce application loads an unsigned or expired-signature module. ClickOnce applications are typically found in the `\AppData\Local\Apps\2.0\` directory. The detection specifically looks for image load events where the image path matches this ClickOnce application directory pattern and the loaded module's signature status is either 'false' (unsigned) or 'Expired'. This behavior can be indicative of an adversary abusing ClickOnce for trusted code execution, potentially for privilege escalation, defense evasion, or persistence, by injecting or replacing modules with malicious unsigned ones.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0036
This rule detects the loading of specific DLL names known to be used by the SVR-attributed GraphicalProton backdoor. The rule looks for an 'ImageLoaded' event where the DLL name ends with one of the predefined malicious DLL names.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0024
This rule detects specific DLL sideloading activity observed to be used by the Diamond Sleet APT group. It looks for the loading of 'Version.dll' by 'clip.exe' or 'DSROLE.dll' by 'wsmprovhost.exe' when these executables and DLLs are located in the 'ProgramData' directory. This behavior is indicative of an adversary attempting to execute malicious code by tricking legitimate applications into loading their crafted DLLs.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0024
Detects potential DLL sideloading of Python DLL files (python39.dll, python310.dll, python311.dll, python312.dll) by monitoring image load events. The rule filters out legitimate loads from common Python installation paths, Visual Studio, Anaconda, CPython build paths, and PyInstaller bundled applications, as well as legitimately signed Python DLLs, to reduce false positives.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
1024
Detects the loading of 'oci.dll' by 'msdtc.exe', which is indicative of the Pingback backdoor. This backdoor is known to establish an ICMP tunnel for command and control communication.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0021
Detects potential sideloading of malicious "aclui.dll" by OleView. This behavior was observed in Raspberry-Robin variants reported by Checkpoint Research in February 2024. The rule specifically looks for OleView.exe loading aclui.dll, while filtering out known legitimate paths and signed executables to reduce false positives.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0021
Detects the loading of .NET Common Language Runtime (CLR) DLLs by scripting applications such as wscript, cscript, or mshta. This behavior can indicate suspicious execution, potentially involving techniques like DotNetToJScript or Donut, which use scripting hosts to execute .NET assemblies in memory. The rule specifically looks for `clr.dll`, `mscoree.dll`, or `mscorlib.dll` being loaded by a predefined list of scripting or utility executables.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0021
Detects the sideloading of specific trojanized DLLs by legitimate Windows executables, a technique observed in Lazarus APT campaigns targeting a Spanish aerospace company. The rule identifies suspicious DLL loads by monitoring 'ImageLoaded' events for particular DLLs being loaded by specific executables from unusual paths, indicating potential DLL hijacking or sideloading for persistence, privilege escalation, or defense evasion.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0020
Detects attempts to load images or drivers that violate Windows Code Integrity policies, indicating a potential bypass attempt or the execution of unsigned/malicious code. This event signifies that the system blocked the load due to unmet authenticode signing level requirements or a policy violation.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0020
Detects potential DLL sideloading of 'AVKkid.dll' by monitoring image load events. The rule specifically looks for 'AVKkid.dll' being loaded by any process, and then filters out legitimate loads by G DATA antivirus software from its expected installation paths. This helps identify malicious instances where 'AVKkid.dll' might be used for persistence, defense evasion, or privilege escalation outside of its legitimate context.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0020
Detects potential DLL sideloading of "appverifUI.dll" when loaded by an 'appverif.exe' process from a non-standard or suspicious location. This rule aims to identify instances where an attacker might place a malicious 'appverifUI.dll' in a directory that 'appverif.exe' would load before its legitimate counterpart, leading to execution of the malicious DLL.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0017
Detects potential DLL sideloading of "waveedit.dll" when loaded by an executable outside of the legitimate Nero WaveEditor installation paths. This technique is often used by adversaries for persistence, privilege escalation, and defense evasion.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0017
This rule detects potential DLL sideloading attempts using the 'coregen.exe' (Microsoft CoreCLR Native Image Generator) binary. It specifically looks for instances where 'coregen.exe' loads DLLs from locations other than the legitimate Microsoft Silverlight or Windows system directories (System32, SysWOW64). This behavior can indicate an adversary attempting to execute malicious code by tricking a legitimate, signed Microsoft binary into loading their arbitrary DLL.
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0016
Detects potential DLL side loading of "KeyScramblerIE.dll" by "KeyScrambler.exe".
Various threat actors and malware have been found side loading a masqueraded "KeyScramblerIE.dll" through "KeyScrambler.exe".
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SigmaHQ Detections@sigmaHQ
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SigmaHQ
1 year ago
0016
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