Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
881 detections
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Detects anomalous remote interactive or network logons where the specific account and remote host/IP combination has not been observed in the previous 14 days. The rule correlates these new login events with subsequent process execution on the destination host within a short window (5 minutes) to identify potential lateral movement where an adversary uses valid credentials to log in and immediately execute commands.
This rule detects potential VNC remote access activity by identifying systems that exhibit both the presence of specific VNC configuration/history files (AccInfo.ini, History.txt) and concurrent network activity on port 10635, which is commonly associated with VNC-like remote access tools.
Detects suspicious file transfer and subsequent execution activity associated with the ScreenConnect (ConnectWise Control) remote access application, which may indicate exploitation of file-transfer vulnerabilities. The rule monitors for ScreenConnect processes dropping executable or script files to disk followed by the spawning of command interpreters to execute those files.
Detects anomalous network connection attempts using DCOM (port 135) or WinRM (ports 5985/5986) that originate from external networks or exceed established internal baseline frequencies. This pattern is often indicative of lateral movement or remote administration abuse via WMI or WinRM.
Detects anomalous network connection attempts using DCOM (port 135) or WinRM (ports 5985/5986) that originate from external networks or exceed established internal baseline frequencies. This pattern is often indicative of lateral movement or remote administration abuse via WMI or WinRM.
This rule detects potential lateral movement by identifying suspicious child processes (such as cmd, powershell, or rundll32) spawned by WmiPrvSE.exe shortly after a remote interactive or network logon on the same device.
Detects anomalous, non-interactive sign-in activity in Microsoft 365 that suggests session cookie replay (Pass-the-Cookie). The rule correlates successful, MFA-validated interactive sign-ins against subsequent, non-interactive sign-ins that lack MFA, occur from a different device and IP address within a short time window, and bypass standard interactive re-authentication.
Detects unauthorized remote access sessions within N-able N-central by monitoring the Windows Application log for events indicating usage of the default 'MSP Support' account or source IP addresses associated with active exploitation of CVE-2026-18577.
Detects anomalous, non-interactive sign-in activity in Microsoft 365 that suggests session cookie replay (Pass-the-Cookie). The rule correlates successful, MFA-validated interactive sign-ins against subsequent, non-interactive sign-ins that lack MFA, occur from a different device and IP address within a short time window, and bypass standard interactive re-authentication.
Detects successful VPN logins following a burst of failed attempts from multiple IP addresses, where the successful login originates from a known malicious IP or an IP associated with the preceding failed attempts. This rule specifically identifies potential credential stuffing or password spraying activity targeting VPN services, often associated with the BlackSuit ransomware group.
Detects anomalous SSH sessions originating from potentially suspicious IP addresses that utilize an 'SSH-2.0-Go' banner and immediately perform file creation operations associated with the RedTail botnet (e.g., shell scripts or architecture-specific binaries).
Detects instances where internal devices access the 3BB sales portal (agent.3bb.co.th) while demonstrating signs of compromise. The rule correlates the portal access with recent network activity involving identified MeshCentral attacker infrastructure (ayuthayatech.com or 92.63.180.133) and further filters for behavioral anomalies such as off-hours access, the use of non-standard browser processes, or the use of unexpected service accounts.
Detects instances where internal devices access the 3BB sales portal (agent.3bb.co.th) while demonstrating signs of compromise. The rule correlates the portal access with recent network activity involving identified MeshCentral attacker infrastructure (ayuthayatech.com or 92.63.180.133) and further filters for behavioral anomalies such as off-hours access, the use of non-standard browser processes, or the use of unexpected service accounts.
Detects anomalous certificate-based authentication attempts to Jasmine network services characterized by rapid, impossible-travel scenarios or geo-inconsistent session patterns. This behavior is indicative of a stolen certificate being reused from a different geographic location or network, bypassing standard authentication patterns.
Detects anomalous certificate-based authentication attempts to Jasmine network services characterized by rapid, impossible-travel scenarios or geo-inconsistent session patterns. This behavior is indicative of a stolen certificate being reused from a different geographic location or network, bypassing standard authentication patterns.
Detects anomalous certificate-based authentication attempts to Jasmine network services characterized by rapid, impossible-travel scenarios or geo-inconsistent session patterns. This behavior is indicative of a stolen certificate being reused from a different geographic location or network, bypassing standard authentication patterns.
Detects a pattern of multiple failed authentication attempts (brute force) from an external IP address followed by a successful authentication event on remote access services such as RDP, VPN, or NTLM. The rule filters for non-private IP addresses and flags successes occurring outside of standard business hours.
Detects suspicious file transfer and subsequent execution activity associated with the ScreenConnect (ConnectWise Control) remote access application, which may indicate exploitation of file-transfer vulnerabilities. The rule monitors for ScreenConnect processes dropping executable or script files to disk followed by the spawning of command interpreters to execute those files.
Detects suspicious file transfer and subsequent execution activity associated with the ScreenConnect (ConnectWise Control) remote access application, which may indicate exploitation of file-transfer vulnerabilities. The rule monitors for ScreenConnect processes dropping executable or script files to disk followed by the spawning of command interpreters to execute those files.
Detects potential remote service session hijacking by monitoring for RDP session ID reuse by a different user or unauthorized SSH session reattachment (e.g., tmux/screen hijacking). It correlates logon events with process execution to identify instances where an existing session is accessed by an account other than the original owner, while excluding legitimate service/support account activity.
Detects anomalous SSH sessions originating from potentially suspicious IP addresses that utilize an 'SSH-2.0-Go' banner and immediately perform file creation operations associated with the RedTail botnet (e.g., shell scripts or architecture-specific binaries).
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