SigmaHQ Detections
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6,800 detections
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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 suspicious DNS queries that contain a base64 encoded string, indicated by the '==.' pattern. This pattern is often used in DNS exfiltration techniques where data is encoded in base64 and sent via DNS queries to bypass network defenses.
Detects the use of the 'spoolss' named pipe over SMB, which can be leveraged to trigger NTLM authentication from a target machine with the print spooler service enabled. This technique is often used in NTLM relay attacks or other forms of printer spooler abuse to gain unauthorized access or escalate privileges.
Detects updates to scheduled tasks (EventID 4702) where the new task content (`TaskContentNew`) contains suspicious keywords. These keywords include common temporary or user-writable directories often used by malware for staging or execution, combined with suspicious commands or scripting interpreters. This rule aims to identify adversaries establishing persistence or executing malicious code via scheduled tasks.
Detects attempts to decode a base64 encoded Gzip archive within a PowerShell script. This technique is often used by adversaries to load malicious content into memory, leveraging standard encoding for obfuscation and memory-resident execution.
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.
Detects specific command-line patterns and process image paths associated with the REvil ransomware group's attack on Kaseya VSA. The rule looks for execution of 'cert.exe' and 'MsMpEng.exe' from unusual paths, as well as specific file deletion commands and references to 'Kaseya VSA Agent Hot-fix' and 'agent.exe'/'agent.crt' in 'kworking' or 'kworking1' directories, which were observed during the Kaseya supply chain incident.
This rule identifies when an Azure Application Gateway is either modified or deleted. This activity is captured through Azure Activity Logs by monitoring specific operation names related to Application Gateway write (modification) and delete operations. Detection of these events can indicate administrative changes to the network infrastructure, which could be legitimate or potentially malicious if unauthorized.
This rule identifies 'impossible travel' events where a user's activities originate from geographically distant locations within a time period that is too short for physical travel between those locations. This often indicates a compromised account being accessed from multiple locations simultaneously or in rapid succession, potentially using different IP addresses or devices.
Detects the creation, modification, or deletion of Kubernetes RoleBindings and ClusterRoleBindings in Google Cloud. These actions can indicate an adversary attempting to escalate privileges or maintain persistence within a Kubernetes cluster by granting themselves or other accounts additional roles and permissions.
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