SigmaHQ Detections
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6,797 detections
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Detects when a firewall rule is modified or deleted in Google Cloud Platform (GCP).
Detects when an Okta user session starts where the user is behind an anonymising proxy service.
Detects files with specially crafted filenames that embed Base64-encoded bash payloads designed to execute when processed by shell scripts.
These filenames exploit shell interpretation quirks to trigger hidden commands, a technique observed in VShell malware campaigns.
These filenames exploit shell interpretation quirks to trigger hidden commands, a technique observed in VShell malware campaigns.
Detects execution of the Kaspersky init.d stop script on Linux systems either directly or via systemctl.
This activity may indicate a manual interruption of the antivirus service by an administrator, or it could be a sign of potential tampering or evasion attempts by malicious actors.
This activity may indicate a manual interruption of the antivirus service by an administrator, or it could be a sign of potential tampering or evasion attempts by malicious actors.
Detects disabling security tools
Detects the execution of a renamed instance of the Remote Monitoring and Management (RMM) tool, MeshAgent.
RMM tools such as MeshAgent are commonly utilized by IT administrators for legitimate remote support and system management.
However, malicious actors may exploit these tools by renaming them to bypass detection mechanisms, enabling unauthorized access and control over compromised systems.
RMM tools such as MeshAgent are commonly utilized by IT administrators for legitimate remote support and system management.
However, malicious actors may exploit these tools by renaming them to bypass detection mechanisms, enabling unauthorized access and control over compromised systems.
Detects macOS Gatekeeper bypass via xattr utility
Cisco Dot1x Disabled
Sigma
Detects the manual disablement of IEEE 802.1X (dot1x) on a Cisco network device interface.
Disabling dot1x bypasses Network Access Control (NAC) mechanisms, potentially allowing unauthorized devices to gain access to the internal network.
This activity is a common technique used by attackers or malicious insiders to establish persistence or perform lateral movement via rogue devices.
Disabling dot1x bypasses Network Access Control (NAC) mechanisms, potentially allowing unauthorized devices to gain access to the internal network.
This activity is a common technique used by attackers or malicious insiders to establish persistence or perform lateral movement via rogue devices.
This rule detects a suspicious crash of the Microsoft Malware Protection Engine
Detects when an attacker calls the "ALTER SERVER AUDIT" or "DROP SERVER AUDIT" transaction in order to delete or disable audit logs on the server
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