Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects instances where an MSSQL service on an OpenCanary honeypot has had a login attempt using SQL Authentication. This indicates an adversary is attempting to brute-force or test credentials against the honeypot's emulated MSSQL service.
Detects remote thread creation in the 'mstsc.exe' process by a process originating from a suspicious temporary or public user directory. This technique is often used by attackers to inject code into 'mstsc.exe' to hook APIs and steal credentials during RDP authentications.
Detects the creation of files that resemble exports of the local Security Account Manager (SAM) database. This activity is often associated with credential dumping techniques used by adversaries to obtain local user hashes. The rule specifically looks for common filenames and paths used when dumping the SAM hive, including those related to known exploits like CVE-2021-36934 and tools like ShadowSteal and hivenightmare.
Detects suspicious rejected SMB guest logon attempts from an IP address, which can be an indicator of an attempted PrintNightmare (CVE-2021-1675) remote code execution exploit or other brute-force/password guessing attacks against SMB. The rule specifically looks for EventID 31017 (SMB client security event for rejected guest logon) where the UserName is empty and the ServerName starts with '\1', which is often seen in exploit attempts.
This rule detects potential exploitation attempts of CVE-2021-42278, also known as "noPac" or "sAMAccountName spoofing". The exploit involves an attacker creating a computer object with known credentials, then clearing its ServicePrincipalName (SPN) attribute. This manipulation grants the attacker additional permissions on the object, allowing them to make further changes. The detection logic specifically looks for Kerberos Key Distribution Center (KDC) events (EventIDs 35, 36, 37, 38) which indicate anomalies in PAC (Privilege Attribute Certificate) or ticket requests, consistent with the post-exploitation phase of CVE-2021-42278 where forged tickets are used.
Detects the execution of a PowerShell script designed to dump stored credentials from Veeam Backup servers. The script specifically targets the "Veeam.Backup" class and uses `Invoke-Sqlcmd` to extract sensitive information, likely from the Veeam configuration database.
Detects the use of the 'spoolss' named pipe over SMB, which can be leveraged to trigger NTLM authentication from a target machine with the print spooler service enabled. This technique is often used in NTLM relay attacks or other forms of printer spooler abuse to gain unauthorized access or escalate privileges.
Detects failed Kerberos TGT issue operations. This can be a sign of manipulations of TGT messages by an attacker, potentially indicating attempts to exploit Kerberos for credential access or to bypass authentication mechanisms.
Detects events generated by user-mode applications when they call the CveEventWrite API, indicating that a known vulnerability is potentially being exploited. Microsoft started using this log in January 2020, notably with CVE-2020-0601 (a Windows CryptoAPI vulnerability). However, the rule's description notes that this log has historically seen limited use for reporting CVEs.
This rule detects an anomaly in Apache Guacamole sessions where two users are simultaneously present in the same session. This could indicate unauthorized access, session hijacking, or a shared credential scenario that deviates from normal behavior.
This rule detects a potential Kerberos Replay Attack on domain controllers. It specifically looks for Event ID 4649, which indicates that a "KRB_AP_ERR_REPEAT" Kerberos response was sent to the client. This error signifies that the KDC detected a replay of a Kerberos Application Server (AP) request, suggesting an adversary might be attempting to reuse stolen Kerberos tickets to gain unauthorized access.
This rule detects attempts to coerce NTLM authentication on the Printer Spooler service, which can be used for privilege escalation. Specifically, it looks for `rundll32.exe` executing with command-line arguments related to `davclnt.dll,DavSetCookie` and keywords like `spoolss`, `srvsvc`, or `/print/pipe/`, indicating an NTLM relay attack against the print spooler service.
Detects the execution of Inveigh, a cross-platform .NET IPv4/IPv6 machine-in-the-middle tool, by looking for its executable name, original file name, description, or specific command-line arguments indicative of its spoofing/sniffing functionality.
Detects suspicious session with two users present
Detects failed Kerberos TGT issue operation. This can be a sign of manipulations of TGT messages by an attacker.
Detects a privilege elevation attempt by coercing NTLM authentication on the Printer Spooler service
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