Daniel Jeremiah
@daniyyellUnited KingdomTrusted contributorCompletionist
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978 detections
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This rule detects a malicious npm package attempting to read Claude MCP connection settings, which may contain sensitive information like API keys and server details. The theft of MCP configuration could allow attackers to impersonate AI integrations. If this rule triggers, the package should be removed, and any associated API keys should be rotated. Further investigation should involve questioning the user about recent software installations or clicked links, and engaging the security team if the situation remains unclear.
Detects the use of two or more distinct remote access products by the same user on the same device within a one-hour window. This could indicate suspicious activity, such as an attacker attempting to maintain persistence or using multiple tools for different stages of an attack, or a legitimate user having multiple remote access tools installed and running concurrently.
Detects the creation or modification of large Zstandard (.zst or .tar.zst) archive files (100MB or larger) within common temporary, data exfiltration, staging, or PeopleSoft-related directories. This activity can indicate an attacker archiving collected data for exfiltration or staging it for further actions.
Detects command-line utilities such as grep, cat, sed, awk, or shell commands (bash, sh) being used to read the 'psappsrv.cfg' file and specifically searching for sensitive configuration parameters like 'Address=', 'HostName=', 'appserv', 'prcs', or 'ps_config_homes'. This activity could indicate an attacker attempting to discover system information or network configurations related to Oracle PeopleSoft.
Detects a MeshCentral agent launched from temporary directories or Oracle PeopleSoft application paths. This activity is often associated with remote access software used by adversaries.
Detects inspection of active mounts or /etc/hosts for PeopleSoft, configuration home, NFS, or environment naming patterns. This rule specifically looks for commands like 'mount', 'cat', 'grep', 'bash', or 'sh' being executed with command-line arguments that include 'mount' and PeopleSoft-related terms ('psoft', 'ps_config', 'nfs'), or '/etc/hosts' with PeopleSoft-related terms ('psoft', 'csprd', 'peoplesoft', 'psft').
Detects external HTTP POST requests to the Oracle PeopleSoft Environment Management Hub or Integration Broker listening connector. This activity could indicate an attempt to exploit public-facing Oracle PeopleSoft applications.
Detects a sender transmitting many attachment-bearing messages or a large aggregate attachment volume to external recipients within thirty minutes. This could indicate data exfiltration or a compromised account being used to send spam or malware.
This YARA rule detects components associated with the SprySocks malware, specifically looking for the '\Device\RawWNPF' device name in conjunction with kernel concealment-related API strings such such as 'NtQuerySystemInformation', 'nsiproxy', 'FwpmFilterAdd', and 'KdDisableDebugger'. The presence of these strings together indicates potential rootkit activity aimed at hiding malicious processes or network activity.
Detects a manual kernel mapper referencing a Fonts-hosted encrypted driver and PE relocation APIs. The rule looks for specific strings often associated with malicious kernel-mode operations, including references to the Windows Fonts directory, and API calls like ZwAllocateVirtualMemory, RtlImageNtHeader, MmGetSystemRoutineAddress, and DriverEntry, which are indicative of dynamic driver loading and PE header manipulation.
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