Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Domain Prevalence
YARA-L
Detects DNS events querying domains that have a low rolling max prevalence.
This rule detects the execution of PingCastle, a legitimate tool used for auditing Active Directory security. Adversaries often leverage such tools during the reconnaissance phase to gather information about the target environment, specifically Active Directory configurations, user accounts, and potential vulnerabilities. The rule identifies PingCastle execution by matching specific MD5, SHA1, and SHA256 hashes of the executable, its original filename, product name, and various command-line arguments associated with its scanning functionalities.
Detects the execution of PingCastle, a tool designed to quickly assess the Active Directory security level, when launched from a potentially suspicious or uncommon parent process or location. This often indicates an adversary performing reconnaissance within an Active Directory environment.
This rule detects the GomorrahStealer infostealer by identifying specific bytecode patterns associated with its capabilities. These capabilities include extracting browser autofill data, browser cookies, taking screenshots, gathering antivirus information, and collecting browser history. The rule looks for the presence of all these distinct bytecode signatures within a file to confirm the presence of GomorrahStealer.
Detects the execution of PingCastle, a tool designed to quickly assess the Active Directory security level.
Detects the execution of PingCastle, a tool designed to quickly assess the Active Directory security level via a script located in a potentially suspicious or uncommon location.
This rule detects the execution of various known hacktools on Linux systems by monitoring process creation events and matching against a predefined list of tool names in the 'Image' field. The tools covered include C2 frameworks (e.g., Cobalt Strike, Metasploit, Havoc, Merlin, Sliver), network scanners (e.g., Nmap derivatives, Nuclei, Recon-ng), web enumeration tools (e.g., Dirb, Ffuf, Gobuster), web vulnerability scanners (e.g., Nikto, WPSCan), and other exploit/post-exploitation tools (e.g., Aircrack-ng, Bloodhound-Python, Hashcat, Hydra, John, SQLMap, PEASS-ng).
This rule detects suspicious user agent strings commonly used by various hacking tools, including vulnerability scanners, brute-force tools, and SQL injection tools, within proxy logs. The rule identifies specific strings indicative of tools like Arachni, Hydra, DirBuster, SQLMap, and others, which are often employed during reconnaissance, initial access, and credential access phases of an attack.
This rule detects when an Azure AD user's credentials have been identified as leaked. This detection is based on the 'leakedCredentials' risk event type reported by Azure AD Identity Protection, indicating that the user's valid credentials (e.g., username and password) have been found on the dark web or other publicly available sources.
Detects attempts to print the contents of common history files (like .bash_history or .zsh_history) using command-line utilities such as `cat`, `head`, `tail`, or `more`. This activity is often performed by adversaries for reconnaissance purposes to gather information about previously executed commands, which may contain sensitive data or reveal system configurations.
Detects the execution of Advanced IP Scanner, a tool often used by ransomware groups for network discovery. The rule identifies the tool by its image name, original file name, description, or specific command-line arguments indicating portable execution.
This rule detects HTTP requests containing user-agent strings commonly associated with known scanning and reconnaissance tools such as Wfuzz, WPScan, and Recon-ng. These tools are often used by attackers to gather information about web applications and infrastructure before launching an attack.
This rule detects the execution of the 'git clone' command on Linux systems when the command line arguments contain suspicious keywords. These keywords are indicative of activities related to exploits, vulnerabilities, remote code execution (RCE), or proof-of-concept (PoC) code for known vulnerabilities like ProxyShell, Log4Shell, and EternalBlue. The rule aims to identify attempts by adversaries to download malicious or exploit-related code from remote repositories.
This rule detects command-line patterns indicative of reconnaissance activities on Linux systems, specifically searching for '.htpasswd' files which often contain credentials, and files with SUID/SGID permissions ('-perm -4000') which can be exploited for privilege escalation. These commands are commonly used by attackers to gather information about the system's configuration and potential credential storage locations.
Detects suspicious DNS queries to external service interaction domains often used for out-of-band interactions after successful RCE
Detects DNS queries for IP lookup services such as "api.ipify.org" originating from a non-browser process. This behavior can indicate reconnaissance activity by malware or an attacker attempting to determine the external IP address of a compromised system.
Detects exploitation attempts targeting CVE-2018-15473 in OpenSSH, specifically looking for a characteristic error message generated during the pre-authentication phase when an attacker attempts to enumerate valid usernames.
This rule detects when a DNS server receives a zone transfer request for a non-existent or non-authoritative zone, indicated by EventID 6004 from the Microsoft-Windows-DNS-Server-Service. This event signifies an attempt to perform a DNS zone transfer that was rejected by the DNS server. Such attempts can be part of reconnaissance activities by adversaries trying to map out a network's DNS infrastructure.
This rule detects the execution of 'git.exe' or 'git-remote-https.exe' when attempting to clone a remote repository. The detection is specifically triggered if the command line arguments contain keywords commonly associated with exploits, vulnerabilities, or proof-of-concept code, such as 'exploit', 'Vulns', 'vulnerability', 'RemoteCodeExecution', 'Invoke-', 'CVE-', 'poc-', 'ProofOfConcept', 'proxyshell', 'log4shell', 'eternalblue', 'eternal-blue', or 'MS17-'. This aims to identify reconnaissance activities where adversaries might be searching for or downloading publicly available exploit code.
Detects reconnaissance activities targeting privileged Active Directory users or groups by monitoring Windows Security Event ID 4661. The rule specifically looks for access attempts to objects identified as privileged users or groups based on their Security Identifier (SID) suffixes or names containing 'admin'. It filters out activity from machine accounts to reduce false positives.
Detects suspicious DNS error messages that indicate a fatal or suspicious error that could be caused by exploiting attempts. Specifically looks for messages related to dropping source port zero packets, denied AXFR requests, and fatal errors causing an exit.
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