SigmaHQ Detections
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6,797 detections
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This rule detects attempts to disable security tools on macOS systems. It specifically looks for the use of '/bin/launchctl' to 'unload' security-related plists (property list files) associated with common security software like Objective-See's LuLu and BlockBlock, Google Santa, Carbon Black, Little Snitch, Tenable Nessus, OpenDNS Umbrella, Crowdstrike Falcon, osquery, Filebeat, Auditbeat, Packetbeat, and td-agent. Additionally, it detects attempts to disable macOS Gatekeeper using '/usr/sbin/spctl' with the 'disable' argument.
Detects remote credential dumping activity using Impacket's secretdump tool by monitoring SMB file access patterns. Specifically, it looks for access to the ADMIN$ share with paths containing 'SYSTEM32\' and ending with '.tmp', which is characteristic of secretdump creating temporary files during its operation.
This rule detects suspicious access to the camera and microphone by processes running from unusual or temporary locations. It monitors registry events related to the CapabilityAccessManager ConsentStore for non-packaged applications. Specifically, it looks for modifications to registry keys that indicate access to 'microphone' or 'webcam' from paths like temporary folders, the Recycle Bin, or public user directories. This behavior can be indicative of malware attempting to record audio or video without user consent.
This rule detects attempts to access a Primary Refresh Token (PRT) resource within Azure. A PRT is a key artifact used for single sign-on (SSO) in Azure AD, allowing users to maintain their authenticated state across various applications and services. Unauthorized access to a PRT can enable an adversary to move laterally within an organization's Azure environment, perform credential theft, and bypass multi-factor authentication (MFA) to gain access to resources as the legitimate user. This detection specifically looks for the 'attemptedPrtAccess' risk event type reported by Azure's risk detection service.
Detects attempts to clear macOS system logs by identifying common commands used for file deletion ('rm', 'unlink', 'shred') when targeting known log directories such as '/var/log' or user-specific '/Users/*/Library/Logs/'. This activity is often performed by adversaries to remove evidence of their presence and actions on a compromised system.
This rule detects suspicious user agent strings commonly associated with various Advanced Persistent Threat (APT) groups and malware families. It specifically targets patterns found in proxy logs, indicating potential command and control (C2) communications or other malicious web activity. The rule includes a broad list of user agent strings linked to specific APTs like Backspace, GrizzlySteppe, Comment Crew, Naikon, Sofacy (Xtunnel, Zebrocy), Derusbi, Winnti, APT17, Bronze Butler (Daserf), TSCookie, Delphi downloader, VPNFilter, FELIXROOT, RMS, Cmstar, KerrDown, APT33 (PowerTon), Hidden Cobra, Strong Pity, Mustang Panda, BackdoorDiplomacy, SideWalk, LitePower (WRITE), ZINC, PlugX, and RedCurl.
Detects potential MuddyWater APT activity involving the use of mshta for execution, PowerShell for system information discovery (operating system, network configuration, security center), and a PowerShell-based backdoor with base64 encoding and web requests.
This rule detects successful password spray activity. A password spray attack involves an adversary attempting a single or small list of commonly used passwords against many different accounts to acquire valid credentials, often to avoid account lockouts. The detection specifically triggers when Azure AD Identity Protection identifies a 'passwordSpray' risk event.
This rule detects suspicious command-line patterns indicative of reverse shell attempts. It looks for various common techniques used to establish a reverse shell, including bash, sh, netcat, socat, Perl, Python, Ruby, and PHP one-liners that connect back to an attacker-controlled host. The rule also includes patterns for xterm reverse shells and specific shell commands often used in conjunction with reverse shells.
Detects potential abuse of ntdsutil or similar methods to dump the ntds.dit database. This activity is often associated with credential dumping from Active Directory.
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