Lacey Cochrane
@NullVectorXUSTrusted contributorCompletionist
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245 detections
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Detects the creation of known malicious Remote Access Trojan (RAT) file artifacts on Windows, Linux, and macOS systems. These artifacts are associated with the plain-crypto-js@4.2.1 NPM package supply chain compromise, which dropped RAT payloads via a postinstall script. Specifically, it looks for 'wt.exe' in '%PROGRAMDATA%' on Windows, 'ld.py' in '/tmp/' on Linux, and 'com.apple.act.mond' in '/Library/Caches/' on macOS.
Detects when an external user is invited to the Entra ID tenant. This could indicate legitimate collaboration or an attempt by an attacker to gain initial access or establish persistence by inviting a malicious external account.
Azure Suspicious Redirect URI Detection
Cortex XDR
This rule detects the modification or addition of redirect URIs for Azure Active Directory applications or service principals that point to suspicious domains. These suspicious domains include known reverse proxy/tunneling services (e.g., ngrok, cloudflare tunnel), callback infrastructure (e.g., burpcollaborator, interact.sh), or localhost/loopback addresses. Such modifications can indicate an adversary attempting to establish persistence, exfiltrate data, or redirect authentication flows to attacker-controlled infrastructure.
Detects network connections to known Command and Control (C2) infrastructure associated with the compromised axios NPM package, which was found to drop a Remote Access Trojan (RAT). The rule specifically looks for connections to the IP address 142.11.206.73 or DNS queries for 'sfrclak.com'.
Detects the execution of a 'kubectl get secrets' command with specific parameters ('--all-namespaces', '-o json', '|| true') via a 'bash' process on Linux systems. This activity is indicative of bulk Kubernetes secret enumeration, a technique used by the TeamPCP stealer as described by Microsoft.
Detects a Python-initiated process attempting to read Google Cloud Platform (GCP) credentials by looking for command-line arguments containing 'GOOGLE_APPLICATION_CREDENTIALS' and 'cat 2>/dev/null'. This behavior is indicative of credential harvesting, potentially related to supply chain compromises like the Trivy incident.
Detects processes referencing confirmed TeamPCP C2 infrastructure or known malicious artifacts from the Trivy supply chain compromise. This includes specific C2 domains/IPs, temporary runner files, and a specific tarball name. It also looks for `entrypoint.sh` executing `grep` for environment variables or SSH-related strings, which could indicate credential access attempts.
Detects `curl` commands performing `POST` requests with `--data-binary` that are spawned from a process whose command line contains "trivy-action". This behavior is indicative of potential data exfiltration in the context of a compromised Trivy supply chain.
MicroStealer Network IOCs
Cortex XDR
Detects network communication to known MicroStealer C2 domains or Discord webhook activity with a 'MicroStealer/1.0' user agent. This rule identifies potential MicroStealer malware activity within the network.
This rule detects the execution chain associated with MicroStealer, specifically looking for processes named 'RocobeSetup.exe', 'Game Launcher.exe', or 'miicrosoft.exe' that are involved in actions related to a file named 'soft.jar'. This indicates the potential presence and activity of the MicroStealer malware.
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