Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects network activity associated with the SilverFox malware, specifically targeting the discovery of relay endpoints via specific URI patterns containing cache-busting timestamps, DNS lookups for identified relay domains (noah-ssh.com.cn) and Cloudflare Workers subdomains, and suspicious HTTP response characteristics such as specific cache headers paired with wildcard CORS headers.
Detects individual file access events performed by non-browser python processes. This rule is designed as a proxy to identify automated file collection activities, such as those performed by 'python-httpx', that may be indicative of low-volume data exfiltration when aggregated over time.
Detects the addition of a new strong authentication method (MFA/authenticator device) to an account. This activity is a common indicator of persistence following a successful AiTM (Adversary-in-the-Middle) phishing attack or initial account compromise, as attackers establish their own MFA device to maintain long-term access.
This rule detects network activity associated with the SilverFox malware, specifically targeting communication patterns between the compromised host and identified relay infrastructure. The detection focuses on unique URL query patterns for relay discovery and dispatcher requests, as well as the identification of staging/download links within server responses.
Detects high-volume or sequential Microsoft Graph API requests targeting sensitive directory, mailbox, application, and site endpoints. This behavior is consistent with reconnaissance activity where an adversary enumerates users, groups, service principals, and accessible resources within a compromised cloud tenant.
Detects the creation of specific staging files and directories associated with the Rapuncel infostealer (e.g., UserInformation.txt, installed_applications.txt, sends.log, browser_decryption.log, or the Filegraber directory) within Windows temporary storage paths. This activity typically occurs following the unauthorized collection of sensitive data such as credentials, digital wallet information, and messenger session data.
Detects login events to the 'My Sign-Ins' portal (mysignins.microsoft.com) by users. This portal is a high-value target for adversaries who have gained access to a session via token theft or session hijacking, as it allows them to modify or add authentication methods (such as MFA devices) to establish long-term persistence in the victim's account.
Detects network activity associated with the Rapuncel malware, including raw TCP exfiltration of files via POST requests to /upload, connections to known malicious C2 infrastructure, and repeated exfiltration retry patterns.
This rule detects repeated HTTP POST requests to a Polygon blockchain endpoint ('eth_call') containing specific contract address and method identifiers. This behavior is indicative of 'EtherHiding', a technique where attackers use blockchain smart contracts to host malicious C2 configurations or update C2 infrastructure, allowing for stealthy dynamic command and control rotation.
Detects the loading of the Alinubx.sys kernel driver or the creation of an NvFsFilter service, which are associated with a BYOVD (Bring Your Own Vulnerable Driver) attack leveraging a renamed CcProtect driver to bypass security protections such as PPL.
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