Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
20,499 detections
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IDS Classtypes
1
Detects the use of regsvr32.exe to execute remote scriptlets, often via HTTP/S or FTP, which is a common technique used to bypass application control and execute malicious code without touching the disk or properly registering a COM object (Squiblydoo).
Detects the execution of the Snowlight dropper (wusvc.exe) masquerading as a Windows Update service. The rule identifies instances where wusvc.exe is spawned by services.exe from an unconventional path, signaling a potential malicious service installation associated with the UNC5221 VSHELL RAT campaign. The payload is known to utilize Hell's Gate/Halo's Gate direct syscall techniques to evade security API hooks.
Hunting rule for nmap used for internal network discovery.
Legitimate vulnerability management and pentests also run nmap; prioritize hits when the source is a server or workload not in your scanner inventory, the parent is an interactive shell or script dropped, or the event chains with
tunneling (chisel, proxychains), or lateral movement.
Strongest signals: RFC1918 subnet sweeps, proxychains-wrapped
-sT/-Pn scans, and full-port sweeps across private ranges.
Legitimate vulnerability management and pentests also run nmap; prioritize hits when the source is a server or workload not in your scanner inventory, the parent is an interactive shell or script dropped, or the event chains with
tunneling (chisel, proxychains), or lateral movement.
Strongest signals: RFC1918 subnet sweeps, proxychains-wrapped
-sT/-Pn scans, and full-port sweeps across private ranges.
Detects attempts to clear Windows event logs using built-in utilities like wevtutil.exe, PowerShell Cmdlets, or WMI providers. These actions are common techniques for attackers to impair system defenses and remove evidence of their activities from a compromised host.
Detects reconnaissance activities targeting Active Directory, specifically focusing on the use of common enumeration tools like net.exe, net1.exe, and BloodHound/SharpHound binaries. The rule triggers when multiple enumeration commands or tool-specific execution artifacts are observed, suggesting preparation for lateral movement or privilege escalation.
This rule detects when the Microsoft Teams process (Teams.exe) creates an executable or installer file (.exe or .msi) in common user-writable directories such as AppData, Temp, or Users/Public. This behavior is indicative of potential malicious activity, as legitimate Teams application updates and add-ins typically reside in specific, protected subdirectories within the Teams folder structure.
Detects instances of common web browser processes (Chrome, Firefox, Edge, etc.) spawning command-line interpreters or scripting hosts (PowerShell, cmd.exe, mshta.exe, wscript.exe, cscript.exe). This pattern is consistent with ClickFix social engineering attacks, where users are manipulated into copying and executing malicious commands from a fake CAPTCHA or error prompt.
Detects the execution of commands to disable Microsoft Defender (specifically Set-MpPreference or stopping the WinDefend service) within 10 minutes of the first interactive user login on a host. This behavior is indicative of threat actors, such as Akira ransomware affiliates, performing anti-forensics and disabling security controls on newly provisioned or compromised systems.
Detects frequent execution of common Active Directory enumeration tools (such as BloodHound/SharpHound, AdFind) and suspicious LDAP attribute queries targeting sensitive AD information (e.g., group membership, service principal names). The rule triggers when an individual user performs more than three such operations within the aggregation window.
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 detects attempts to enumerate Active Directory domain trust relationships using common administrative tools. It identifies the execution of 'nltest.exe' with trust-related arguments ('/domain_trusts', '/trusted_domains', '/all_trusts', '/dclist:') and the usage of PowerShell cmdlets or commands ('Get-ADTrust', 'netdom query trust', or Active Directory domain queries) known for querying domain trust configurations. Adversaries often perform this discovery to map out Windows multi-domain or forest environments to identify lateral movement opportunities.
Detects Node.js executing the malicious setup.cjs script or easy-day-js with the --no-warnings flag, associated with the Mastra npm supply chain compromise.
Detects the hallmark of a ClickFix attack: a user tricked by a fake error message into pasting a PowerShell command into the Run dialog (explorer.exe), which accesses the clipboard.
Detects the use of PowerShell to perform automated reconnaissance against Microsoft Graph API endpoints, specifically targeting HR, payroll, and personal user data. This activity is associated with post-compromise behaviors seen in campaigns like Payroll Pirate, where attackers utilize compromised credentials to harvest sensitive organizational information.
Detects a suspicious sequence where 7-Zip is used to extract a RAR archive, immediately followed by the creation of executable files (.exe, .bat, .cmd, etc.) in common user-writable directories. This chain often indicates an attempt to bypass Mark-of-the-Web (MotW) protections, as files extracted by archive tools may not inherit the MotW zone information, allowing potentially malicious files to execute without security prompts.
This rule detects potential container escape attempts by monitoring for malicious use of the 'docker cp' command with path traversal sequences (../) or the creation of suspicious files by the docker daemon outside of expected docker storage directories, which may indicate symlink injection attacks to modify files on the host filesystem.
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.
This rule detects indicators of exploitation for CVE-2026-20245 in Cisco Catalyst SD-WAN Manager. It monitors for the upload of malicious tenant configuration files, the creation of unauthorized 'troot' administrative accounts, subsequent lateral movement via 'su', modifications to critical system authentication files like /etc/passwd or /etc/shadow, and post-exploitation configuration exfiltration via REST API endpoints.
Detects suspicious activity associated with the AdaptixC2 framework, specifically process hollowing or shellcode injection where WmiPrvSE.exe spawns or creates remote threads in WAB.exe (Windows Address Book). This pattern has been observed in Akira ransomware intrusions.
Detects instances where the RustDesk remote support process (rustdesk.exe) spawns suspicious child processes such as command shells, scripting engines, or administrative utilities. This behavior is indicative of a potential session permission bypass or post-exploitation activity where an attacker leverages the context of the remote support application to execute arbitrary commands.
Detects network connections to the Telegram Bot API (api.telegram.org) originating from processes executing from potentially suspicious or non-standard locations (Temp, AppData, ProgramData), excluding the legitimate Telegram Desktop client. This pattern is commonly observed in Remote Access Trojans (RATs) such as the Millenium RAT and other malware families utilizing Telegram as a C2 channel.
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