Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the execution of the "driverquery" utility, which can be used by adversaries to perform reconnaissance on installed drivers. This rule specifically looks for 'driverquery.exe' or 'drvqry.exe' as the image or original filename.
Detects the execution of the 'crontab -l' command, which is used to list scheduled cron jobs for the current user. This activity can be part of discovery tactics by adversaries to understand the system's scheduled tasks.
This rule detects the use of the 'find' command on Linux systems with specific permission-related arguments. These arguments are often used by attackers during the discovery phase to locate files with unusual permissions, such as SUID/SGID binaries (-perm -4000, -perm -2000, -perm -u=s, -perm -g=s) which can be exploited for privilege escalation, or world-writable files (-perm 0777, -perm -222, -perm -o w) which could be used for persistence or data modification. It also looks for world-executable files (-perm -o x).
This rule detects the execution of the 'tasklist' command, which adversaries may use to gather information about running processes on a system. This information can help them understand the system's environment and identify potential targets or further actions.
This rule identifies activities related to Google Cloud Platform (GCP) Packet Mirroring. Packet Mirroring allows capturing full network traffic, which can be abused by adversaries to intercept and collect sensitive data from unencrypted internal network communications. The rule specifically looks for various API calls related to the creation, modification, deletion, or listing of Packet Mirroring configurations.
This rule detects when a monitor, SPAN (Switched Port Analyzer), or RSPAN (Remote Switched Port Analyzer) is configured or modified on a Cisco network device. These configurations are often used for network sniffing or traffic analysis, which can be legitimate for troubleshooting but also abused by adversaries for data exfiltration or reconnaissance.
Detects the execution of "DirLister.exe", a utility used by the BlackCat ransomware group to enumerate files and directories on a compromised system. This tool helps adversaries quickly map out the file system for further malicious activities like data exfiltration or encryption.
Detects potential network sniffing via use of network tools such as "tshark", "windump". Network sniffing refers to using the network interface on a system to monitor or capture information sent over a wired or wireless connection. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
Detects PowerShell scripts attempting to access the default Windows Mail App mailbox data. This activity could indicate an adversary trying to manipulate, exfiltrate, or delete stored emails. The detection specifically looks for the string '\Comms\Unistore\data' within PowerShell script blocks, which points to the location where the Windows Mail App stores its data.
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 attempts to request a handle to the Security Account Manager (SAM) registry hive. Accessing the SAM hive can indicate an adversary attempting to dump credentials.
Detects the execution of ADRecon.ps1, a PowerShell script used for Active Directory reconnaissance. The rule identifies specific function names and a default report filename commonly found within the ADRecon script. This tool has been reported to be actively used by the FIN7 threat group.
Detects suspicious child processes spawned by the "Manage Engine ServiceDesk Plus" Java web service. This often indicates successful exploitation of the application, potentially related to vulnerabilities like CVE-2022-47966. The rule looks for the execution of various system utilities and scripting interpreters commonly used by attackers for reconnaissance, privilege escalation, defense evasion, or establishing command and control.
This rule detects PowerShell scripts that perform potential registry reconnaissance. Specifically, it looks for the use of PowerShell cmdlets like 'Get-Item', 'gci', or 'Get-ChildItem' in conjunction with specific registry paths known to contain system configuration, service information, or autostart entries. Adversaries often query these registry keys to gather information about the system's credentials, configuration, and installed software, which can aid in further compromise or privilege escalation.
Detects the use of the redirection character ">" in command-line arguments of `cmd.exe`. This technique is often used by malicious actors to redirect the output of reconnaissance commands (e.g., `hostname`, `dir`) to files for later exfiltration.
This rule detects the execution of the 'grep' command on Linux systems when it is used to search for specific filenames associated with the GobRAT malware. The filenames include 'apached', 'frpc', 'sshd.sh', and 'zone.arm'. This activity indicates that an attacker, potentially using GobRAT, is attempting to discover files related to their malware deployment or persistence mechanisms.
Detects the use of 'arp -a' or 'ping' commands targeting common private and loopback IP address ranges on Linux systems, which can indicate an adversary performing remote system discovery.
Detects the use of `grep` or `egrep` commands on Linux systems to search for common security software process names. This activity can indicate an adversary attempting to discover installed security solutions on a compromised host.
This rule detects attempts to access specific registry keys associated with the Windows Local Security Authority (LSA) to calculate the SysKey. SysKey is a critical encryption key used to protect sensitive system information, including password hashes. Adversaries may attempt to extract the SysKey to decrypt credentials or other sensitive data stored in the LSA, often as part of credential dumping activities. The rule specifically looks for Security Event IDs 4656 (A handle to an object was requested) or 4663 (An attempt was made to access an object) where the ObjectType is 'key' and the ObjectName ends with 'lsa\JD', 'lsa\GBG', 'lsa\Skew1', or 'lsa\Data'. These registry paths are known locations where SysKey components are stored.
Detects PowerShell execution that enumerates Active Directory users with the 'DONT_REQ_PREAUTH' flag set (UserAccountControl flag 4194304). This flag indicates that the account does not require Kerberos pre-authentication, making it vulnerable to AS-REP Roasting attacks where an attacker can request a Ticket Granting Ticket (TGT) without providing credentials and then attempt to crack the hash offline.
This rule detects PowerShell scripts that enumerate directories using `Get-ChildItem` and output the results to a file using `Out-File -append`. The detection logic specifically looks for the combination of `foreach`, `Get-ChildItem`, `-Path`, `-ErrorAction SilentlyContinue`, `Out-File`, and `-append` within the PowerShell script block text. This behavior has been associated with MAZE ransomware for directory discovery.
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