Ethan Andrews
@eandrewsTrusted contributorCompletionist
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This rule detects the creation or modification of the 'goopdate' registry value under the HKCU\Software\Microsoft\Windows\CurrentVersion\Run path. This technique is used to achieve persistence by executing specified files (e.g., Sang.exe or defender.exe with the 'work' parameter) upon user logon.
Detects inbound email messages authenticated with an amazonses.com DKIM signature that originate from a specific Amazon SES Tokyo-region relay IP address. This may indicate an adversary is leveraging a compromised or unauthorized transactional email account (e.g., SES or third-party platforms like Resend) to send emails on behalf of a victim domain.
Detects unauthorized modifications to the SAM registry hive (specifically keys and values related to user account RIDs) by non-system processes, which is a technique used in RID hijacking to grant elevated privileges or create hidden accounts.
Detects ESXi shell execution of vim-cmd commands used to register unregistered/hidden virtual machines or to create and clone VM snapshots, consistent with BrickStorm's technique of establishing hidden rogue VMs on vSphere/ESXi and stealing cloned VM snapshots for credential harvesting.
Detects a single user account authenticating from an unusually high number of distinct IP addresses within a short timeframe (1 hour), which may indicate the use of rotating proxy services or account sharing, commonly associated with unauthorized access or reseller activity.
Detects the execution of the Bun JavaScript runtime by npm or node.js during lifecycle tasks (preinstall, postinstall, etc.). This behavior is highly indicative of the ChainDrop/Shai-Hulud supply chain worm, which uses npm lifecycle scripts to download and execute a second-stage payload using the Bun runtime.
This rule detects the execution of the Unisoc/Sprd 'EngineerModeActivity' via ADB shell on Android devices. Invoking this activity enables diagnostic modes and debug logging, which are often used by threat actors to facilitate exploitation, reverse engineering, or the collection of sensitive crash dump information for modem-related research.
Detects credential and token harvesting behaviors associated with the ChainDrop/Shai-Hulud 2.0 npm worm, specifically targeting CI/CD environments. The rule monitors for unauthorized access to /proc/[pid]/mem to scrape memory for workflow secrets, extraction of OIDC environment variables, and suspicious invocation of the GitHub CLI (gh) to steal authentication tokens.
Detects the execution of malicious 'node.exe' processes that invoke 'setup.mjs' or 'math_init.js' scripts from within .vscode or .claude configuration directories. This pattern is characteristic of the ChainDrop/Shai-Hulud npm supply chain worm, which leverages VS Code tasks or Claude Code session hooks to achieve persistent execution of dropper scripts without triggering standard npm installation flows.
Detects the creation of executable script files (PHP, ASP, ASPX, JSP) by web server worker processes (e.g., httpd, nginx, w3wp.exe, php-fpm). This behavior is strongly indicative of the final stage of a web exploitation workflow where an attacker writes a web shell to the server to establish persistence or remote command execution capabilities.
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