Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects execution of rundll32.exe with command-line arguments involving 'DavWWWRoot' and external domains ('pf.ch' or 'verification.google'), which is characteristic of attempts to force remote WebDAV authentication or execute malicious code via network-hosted resources.
This rule detects potentially malicious behavior associated with Microsoft Office applications, such as Word, initiating suspicious WebDAV network connections, dropping executable or sensitive files, or spawning known LOLBAS processes (rundll32, explorer, regsvr32) from suspicious directories like Temp or WebDAV paths. It also includes a blocklist for known malicious file hashes associated with these patterns.
This rule detects potentially malicious behavior associated with Microsoft Office applications, such as Word, initiating suspicious WebDAV network connections, dropping executable or sensitive files, or spawning known LOLBAS processes (rundll32, explorer, regsvr32) from suspicious directories like Temp or WebDAV paths. It also includes a blocklist for known malicious file hashes associated with these patterns.
AD CS ESC8 Certificate Request via NTLM
Cortex XDR
Detects Active Directory Certificate Services (AD CS) certificate requests that utilize NTLM authentication rather than Kerberos. This behavior is indicative of potential NTLM relay attacks (ESC8), where an attacker forces a machine account to authenticate to the AD CS web enrollment endpoint via NTLM to obtain a certificate on behalf of that machine.
Detects an Exchange server initiating outbound SMB (port 445) connections to non-private (external) IP addresses. This behavior is highly characteristic of PetitPotam (MS-EFSR) coercion, where an attacker forces the server to authenticate to an external, attacker-controlled UNC path to capture NTLM authentication credentials or relay them to other network resources.
Detects rundll32.exe loading davclnt.dll, which triggers the WebClient service to auto-start and perform a network callout to retrieve WebDAV-hosted content.
Detects the access or execution of Windows Library files (.library-ms) which can be leveraged as a vector for forced NTLM authentication (CVE-2025-24054). By placing a maliciously crafted library file on a system or network share, an attacker can cause the victim's machine to automatically authenticate to an external resource, potentially exposing user credentials for NTLM relay or cracking.
Detects the access or execution of Windows Library files (.library-ms) which can be leveraged as a vector for forced NTLM authentication (CVE-2025-24054). By placing a maliciously crafted library file on a system or network share, an attacker can cause the victim's machine to automatically authenticate to an external resource, potentially exposing user credentials for NTLM relay or cracking.
Detects the use of the 'pushd' command in combination with a WebDAV share path utilizing the '@SSL' notation. This technique can be used by attackers to force the connection to a remote WebDAV share, potentially triggering NTLM credential relay or accessing malicious remote resources. The inclusion of 'rundll32' in the condition suggests monitoring for process proxying or exploitation chains often associated with such connections.
Detects rundll32.exe loading davclnt.dll, which triggers the WebClient service to auto-start and perform a network callout to retrieve WebDAV-hosted content.
Detects the use of the 'pushd' command in combination with a WebDAV share path utilizing the '@SSL' notation. This technique can be used by attackers to force the connection to a remote WebDAV share, potentially triggering NTLM credential relay or accessing malicious remote resources. The inclusion of 'rundll32' in the condition suggests monitoring for process proxying or exploitation chains often associated with such connections.
Detects the use of the 'pushd' command in combination with a WebDAV share path utilizing the '@SSL' notation. This technique can be used by attackers to force the connection to a remote WebDAV share, potentially triggering NTLM credential relay or accessing malicious remote resources. The inclusion of 'rundll32' in the condition suggests monitoring for process proxying or exploitation chains often associated with such connections.
Detects rundll32.exe loading davclnt.dll, which triggers the WebClient service to auto-start and perform a network callout to retrieve WebDAV-hosted content.
Detects the access or execution of Windows Library files (.library-ms) which can be leveraged as a vector for forced NTLM authentication (CVE-2025-24054). By placing a maliciously crafted library file on a system or network share, an attacker can cause the victim's machine to automatically authenticate to an external resource, potentially exposing user credentials for NTLM relay or cracking.
Detects the execution of known PetitPotam exploitation tools or the use of command line arguments related to EFS RPC functions (e.g., EfsRpcOpenFileRaw) used to coerce authentication via NTLM reflection.
Detects the execution of known PetitPotam exploitation tools or the use of command line arguments related to EFS RPC functions (e.g., EfsRpcOpenFileRaw) used to coerce authentication via NTLM reflection.
Detects the execution of known NTLM relay and coercion tools (such as PetitPotam, EfsPotato, PrinterBug, DFSCoerce, or Coercer) when attempting to coerce a local authentication or credential relay using the local loopback address. These tools leverage various RPC-based techniques to force the local machine to authenticate to an attacker-controlled source, facilitating NTLM relay attacks.
Detects anomalous SMB NTLM authentication traffic indicative of relay attacks, where an attacker intercepts an authentication request and relays it to another SMB service.
Detects instances where privileged system processes such as lsass.exe or svchost.exe attempt a network connection to the local loopback address on ports other than standard SMB ports (445, 139). This pattern is indicative of potential coercion or relay attacks, specifically targeting the authentication mechanisms of these services to an attacker-controlled SMB server.
Detects NTLM-authenticated network logons (Logon Type 3) originating from loopback IP addresses (127.0.0.1, ::1, or 0.0.0.0). This behavior is often associated with NTLM relay attacks or credential reflection bypass techniques where an adversary forces a local service to authenticate to itself to gain unauthorized access.
Detects the execution of known NTLM relay and credential harvesting tools such as Responder, Inveigh, and PetitPotam, or suspicious command-line patterns involving the use of 'net use' or common Windows binaries (e.g., powershell.exe, rundll32.exe) to access or force SMB authentication with remote IP addresses.
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