Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects the use of common command-line tools (curl, wget, python, etc.) to interact with known cloud provider metadata service IP addresses or URL paths, often performed by shell processes. This behavior is frequently associated with initial reconnaissance or attempts to steal identity tokens from cloud-based virtual machines.
Detects malicious processes associated with the HVNC backdoor (e.g., UpdateAssistant.exe, SysMaintenance.exe) concurrently running alongside identified security product processes on the same device. This behavior suggests the malware is performing automated reconnaissance of installed security software to inform further compromise actions.
Detects sign-in activity using the OAuth 2.0 device code flow, followed by subsequent authentication attempts from the same account originating from anomalous, previously unseen geographic locations or using unfamiliar applications. This pattern is indicative of a device code phishing attack where an adversary lures a user into authorizing a malicious device or application and subsequently hijacks the resulting session to access resources from a different location.
This rule detects potential unauthorized access to sensitive information by correlating the execution of command-line tools (sed, bash, sh) with secret-related flags or file references, followed shortly by execution of cloud CLI commands that enumerate or retrieve secrets. This behavior is indicative of an attacker attempting to parse or extract sensitive data stored in local configuration files or memory, and then fetching specific secret values from a cloud secret manager.
Detects the execution of known HVNC (Hidden Virtual Network Computing) backdoor binaries identified by specific file names and staging directory paths. These binaries are designed to create hidden desktop sessions and perform input injection to facilitate unauthorized remote control of a compromised host.
This rule detects network traffic patterns indicative of a reverse shell established by DSCourier, a tool or script that leverages the ConfigurationRemotingServer interface to facilitate interactive command execution on a remote host.
Detects DNS queries for randomized subdomains (8-12 character alphanumeric labels) prepended to specific thematic .de parent domains. This pattern is characteristic of phishing infrastructure rotation and device-code phishing campaigns where adversaries dynamically generate domains to evade detection.
Detects incoming emails processed by Rspamd that exhibit suspicious authentication header signatures. The rule identifies emails lacking DKIM, ARC, or user agent information while simultaneously showing a zero receive count, potentially indicating spoofed, unauthenticated, or malformed phishing attempts.
Detects the mounting of Virtual Hard Disk (VHD) files using system processes such as explorer.exe or vds.exe. This activity is a known technique for bypassing Mark-of-the-Web (MOTW) security protections, as files within the mounted container may not inherit the MOTW attribute. This behavior was observed in Operation QUICSILVER, where actors used VHD files disguised with benign extensions to deliver malicious LNK payloads to targets.
Detects specific FTP commands (STOR, RETR, TYPE I) and passive mode responses directed to or originating from identified malicious IP addresses associated with the LucidRook threat actor. This rule monitors for potential file exfiltration, payload retrieval, and command-and-control communication over the FTP protocol.
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