Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects the installation, service configuration, and key management activities associated with the OpenSSH server on both Windows and Linux environments. It monitors for commands related to installing OpenSSH capabilities or packages, starting the sshd service, modifying SSH registry keys on Windows, creating or modifying configuration files (sshd_config), and updating authorized_keys files. It also flags inbound network connections to non-standard or default SSH ports originating from external IP ranges.
This rule detects suspicious access patterns to Windows administrative shares (C$, D$, E$, IPC$, ADMIN$). It specifically looks for multiple access attempts (10 or more within an hour) involving read or write operations (AccessMask contains '0x0001' or '0x0002') from a single source IP address and account. This behavior can indicate lateral movement, data exfiltration, or other malicious activity.
This rule detects potential lateral movement activity by identifying a single user account attempting to log on to five or more distinct computers with at least ten logon attempts within a five-minute window. It specifically looks for successful logons (EventID 4624) with network, remote interactive, or remote desktop logon types (LogonType 3, 9, 10) and excludes machine accounts (TargetUserName not ending with '$'). This pattern can indicate an adversary attempting to spread across the network using compromised credentials.
Detects the presence of known exploit harness files or the execution of Python scripts and binaries associated with libssh2 publickey subsystem heap overflow and arbitrary free exploits (including proof-of-concept code and reproduction harnesses).
Detects evidence of CVE-2026-48558 exploitation, where SimpleHelp servers fail to cryptographically verify OIDC tokens. This vulnerability allows unauthenticated attackers to create privileged technician accounts and bypass Multi-Factor Authentication (MFA). The rule monitors for 'New Anon' log tags in OIDC authentication flows or unauthorized HTTP POST requests to SimpleHelp technician management endpoints.
Detects unusual network connections or process creation events originating from the 'sharingd' daemon on macOS. 'sharingd' handles various Apple sharing features (AirDrop, Handoff, Shared Clipboard). Unusual child processes or network activity involving this daemon may indicate abuse for unauthorized data transfer, lateral movement, or remote service interaction.
Detects the execution of PsExec (psexec.exe or psexesvc.exe) where the binary is not digitally signed by Microsoft Corporation. This is often an indicator of renamed or tampered versions of the tool used for lateral movement or remote command execution.
Detects suspicious WinRM SOAPAction headers indicating potential lateral movement or remote command execution (e.g., shell command, process creation, or WMI operations) over WinRM HTTP ports 5985 and 5986.
Detects post-exploitation activity related to CVE-2026-55200 (libssh2 heap OOB write), specifically identifying when curl, git, or php processes spawn interactive shells or attempt to access sensitive processes like lsass.exe, indicating a successful exploit chain.
Detects the execution of scripting interpreters and remote management tools originating from the SimpleHelp RMM process tree. This activity is indicative of post-exploitation abuse where an attacker, having hijacked a technician session (e.g., via CVE-2026-48558 OIDC bypass), uses the RMM console to execute commands on remote endpoints.
Detects multiple failed SSH authentication attempts against a server from a single source within a short timeframe, which is indicative of a brute force password attack.
Detects the use of 'pushd' via cmd.exe, powershell.exe, or pwsh.exe to mount remote UNC or WebDAV paths. This command allows users to map a network share to a temporary drive letter and change the current working directory, which is frequently used by adversaries to access remote shares or stage tools.
This rule detects potentially malicious use of libcurl or curl.exe involving mTLS-related flags (e.g., --cert, --key, --cacert) in non-browser processes. It specifically flags instances where such processes perform repeated HTTPS connections to remote hosts, which may indicate exploitation of CVE-2026-8932 related to mTLS connection reuse and authentication bypass.
This rule monitors Microsoft Entra ID (Azure AD) sign-ins for indicators associated with the 'Payroll Pirate' campaign. It identifies non-interactive OAuth/token-based authentication requests originating from residential Internet Service Provider (ISP) ASNs using devices marked as unmanaged. It further elevates risk by detecting impossible travel (same user accessing from multiple IPs in a short window) and the use of specific browser User-Agent strings (Firefox or Axios) characteristic of the threat actor's tooling.
This rule monitors Cisco SD-WAN environments for indicators of post-exploitation, including unauthorized SSH lateral movement, abuse of administrative tools (vshell, confd_cli), suspicious tenant list modifications related to CVE-2026-20245, privilege escalation to backdoor accounts, system file tampering (/etc/passwd, /etc/shadow), and anti-forensic activities such as log and history deletion.
Detects successful SSH authentication to administrative accounts ('vmanage-admin' or 'admin') on Cisco Catalyst SD-WAN Manager (vManage) devices originating from IP addresses associated with the threat actor UAT-8616. This activity relates to exploits targeting CVE-2026-20127 and CVE-2026-20182 for unauthorized access via authentication bypass or certificate abuse.
This rule detects interactive RDP logons (Logon Type 10) on Windows systems. While RDP is a legitimate remote administration tool, it is frequently abused by adversaries following credential theft to move laterally within a network.
This rule detects the presence of KVM-over-IP devices and spoofed USB peripherals, which are commonly associated with illicit remote access, particularly by DPRK IT workers.
This rule detects potential lateral movement or account compromise by identifying instances where a single user account successfully logs into four or more unique computer systems via Remote Desktop (Logon Type 10) within a 30-minute window.
This rule detects two potentially malicious activities related to SSH: first, specific utilities (e.g., luserput, blacklist, ssh) initiating outbound connections to internal network CIDR ranges over port 22, which may indicate lateral movement; second, the creation or modification of the .ssh/authorized_keys file, which is a common technique for establishing persistence or unauthorized access.
Detects the execution of wmic.exe with arguments typical for remote process creation, such as using the /node switch to execute commands on remote systems. This behavior is commonly associated with lateral movement or remote administration.
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