SigmaHQ Detections
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6,797 detections
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Detects file creation events with filename patterns used by Impacket.
This rule detects potential DLL sideloading of 'libvlc.dll'. Adversaries may place a malicious 'libvlc.dll' in a directory that is searched before the legitimate VLC installation path, causing a legitimate application to load the malicious DLL instead of the intended one. This technique can be used for defense evasion, persistence, and privilege escalation. The rule specifically looks for 'libvlc.dll' being loaded from any location other than the default VLC installation directories.
This rule detects potential DLL sideloading activity involving the 'JSESPR.dll' library when it is loaded from a location other than the legitimate 'C:\Program Files\Common Files\Justsystem\JsSchHlp\' directory. This specific behavior is associated with the JUSTSYSTEMS Japanese word processor and has been observed in campaigns like 'Operation LiberalFace' targeting Japanese political entities.
Detects DLL sideloading of system DLLs that are not present on the system by default (at least not in system directories).
Usually this technique is used to achieve UAC bypass or privilege escalation.
Usually this technique is used to achieve UAC bypass or privilege escalation.
Detects processes loading the non-existent DLL "ShellChromeAPI.dll". This behavior is often associated with DLL sideloading attacks, where an adversary places a malicious DLL with a name that a legitimate application expects to load. A known example involves "DeviceEnroller.exe" attempting to load this DLL when used with the "PhoneDeepLink" flag. Adversaries can exploit this by dropping their own renamed malicious DLL to achieve defense evasion, persistence, or privilege escalation.
Detects DLL sideloading of 'vmGuestLib.dll' by the 'WmiApSrv.exe' service. This rule specifically looks for instances where 'WmiApSrv.exe' loads 'vmGuestLib.dll' from a path that includes '\VMware\VMware Tools\vmStatsProvider\win32', while the DLL itself is not legitimately signed. This behavior can indicate an attempt to execute malicious code by tricking a legitimate process into loading a rogue DLL.
Detects potential DLL sideloading of a signed dbghelp.dll by the Sysinternals VMMap utility. This rule specifically looks for VMMap (vmmap.exe or vmmap64.exe) loading a dbghelp.dll from a non-standard path ('C:\Debuggers\dbghelp.dll') where the loaded DLL is signed. This could indicate an adversary attempting to load a malicious, yet signed, DLL to evade detection or achieve persistence/privilege escalation.
Detects suspicious Windows Defender Application Control (WDAC) policy file creation from abnormal processes that could be abused by an attacker to block EDR/AV components while allowing their own malicious code to run on the system. The rule specifically looks for file creation events in the default WDAC policy directory and filters out known legitimate processes that manage these policies.
Detects file access to browser credential storage paths by non-browser processes, which may indicate credential access attempts.
Adversaries may attempt to access browser credential storage to extract sensitive information such as usernames and passwords or cookies.
This behavior is often commonly observed in credential stealing malware.
Adversaries may attempt to access browser credential storage to extract sensitive information such as usernames and passwords or cookies.
This behavior is often commonly observed in credential stealing malware.
Detects processes that query known 3rd party registry keys that holds credentials via commandline
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