Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
3,641 detections
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Detects the execution of the 'MicrosoftSystem64' RAT binary across Windows, macOS, and Linux operating systems. This specific malware is associated with the FAMOUS CHOLLIMA threat group, which is linked to DPRK, and is known to deploy a Node.js SEA RAT that exfiltrates data to HuggingFace.
This rule detects the creation of 'requirements.txt' or 'pom.xml' files on a system. These files are commonly used in software development projects (Python and Java/Maven, respectively) to manage dependencies and project configurations. Monitoring their creation can help identify legitimate development activities, but also potential malicious actions such as supply chain compromise where an adversary might introduce or modify project dependencies.
GitHub CLI Token Extraction
Cortex XDR
Detects the execution of `gh auth token` which is used by the Shai-Hulud malware to steal the active GitHub Personal Access Token (PAT). This rule specifically looks for the `gh.exe` or `gh` process executing with command-line arguments containing both "auth" and "token".
This rule detects potential C2 beaconing behavior by identifying devices that make a high number of periodic outbound connections (20 or more within an hour) to a single external IP address on common web and C2-related ports (80, 443, 8080, 8443, 4444, 5555, 8888, 9001). The rule summarizes these connections by device, remote IP, and initiating process, highlighting sustained communication patterns indicative of command and control.
Detects the __DAEMONIZED=1 environment variable marker used by the vpmdhaj npm supply chain campaign (Mini Shai-Hulud) to spawn a detached credential-harvesting payload during npm install. This marker prevents re-entry when payload.bin is re-launched on subsequent require() calls. Microsoft explicitly recommends this detection, noting that the exact string __DAEMONIZED=1 has no legitimate npm ecosystem use, leading to near-zero false positives.
Detects Google Chrome being launched with multiple flags designed to suppress crash dialogs and session restore bubbles. This behavior is indicative of forced browser restarts after a hijacker modifies Secure Preferences, as seen with malware like FlutterShell and Calendaromatic (CL-CRI-1089).
Detects potential WordPress malware activity that abuses Steam Community profile comments as a command-and-control (C2) channel. The malware retrieves encoded payloads hidden in Steam profile comments using invisible Unicode characters, decodes malicious URLs, and downloads additional JavaScript payloads. This rule identifies outbound connections from WordPress servers to Steam Community URLs or known malicious infrastructure associated with this campaign.
Detects suspicious execution of the 'open' command targeting the Sparkle framework's installation cache directory on macOS. This activity could indicate the use of a backdoor like FlutterShell attempting to silently update or execute malicious code via a legitimate update mechanism.
Detects Node.js or Bun processes accessing sensitive developer configuration directories such as .ssh and .npmrc, indicating potential credential harvesting. This rule specifically looks for file access or open events initiated by 'node.exe', 'node', 'bun.exe', or 'bun' processes targeting paths containing '.ssh' or '.npmrc', or files named '.npmrc'.
KQL Query
This rule detects devices making a high volume of outbound network connections (more than 1000 connections within a one-minute window) to a single remote IP address. This behavior could indicate a network denial-of-service (DoS) attack originating from the device, or potentially other forms of high-volume network activity such as data exfiltration or scanning.
Detects the silent or command-line driven installation of macOS configuration profiles (`profiles install`), which attackers use to bypass security settings or manage device configurations maliciously.
Detects macOS system fingerprinting targeting IOPlatformUUID using the ioreg command. This technique was observed being used by the FlutterShell malware (Operation FlutterBridge) to uniquely identify victims upon installation.
Detects instances where the 'killall' command is used to forcefully terminate Google Chrome processes. This activity can be indicative of malware attempting to disrupt browser activity, potentially to prevent detection, interfere with user sessions, or facilitate other malicious actions. Specifically, this behavior has been associated with the FlutterShell backdoor.
Detects unauthorized modification of the Google Chrome Secure Preferences file, specifically targeting the default search provider data to hijack browser searches. This behavior is actively used by malware such as FlutterShell to redirect all Chrome searches to attacker-controlled infrastructure.
Detects the creation or modification of specific LaunchAgent plist files used by JINX-0164's AUDIOFIX and MINIRAT malware for persistence on macOS. The rule monitors for file creation, renaming, or modification events within the /Library/LaunchAgents/ directory, specifically targeting plist files with names known to be used by this malware.
macOS dscl User Creation
Gravwell
Detects the creation of local user accounts on macOS using the 'dscl' utility, specifically looking for the '-create' action within the '/Users/' directory and the presence of 'UniqueID' or 'IsHidden' parameters. The rule excludes common system-related UniqueIDs (0, 1, 202, 205, 248) to reduce false positives from legit system operations.
Identifies Node.js processes downloading the Bun runtime from GitHub Releases. This behavior was observed in the vpmdhaj npm supply chain attack, where Gen-2 stagers silently downloaded Bun to execute bundled credential harvesting payloads without an immediate C2 payload drop.
KQL Query
KQL Query
This rule detects modifications, creations, or renames of the Google Chrome 'Secure Preferences' file on macOS. This activity can be indicative of malware, such as FlutterShell, attempting to alter browser settings or inject malicious configurations for persistence or other malicious purposes.
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