Ibrahim Saud
@tektrixIndiaCompletionist
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Detects attempts to exploit CVE-2021-33044, an authentication bypass vulnerability in Dahua NetKeyboard hardware. The rule triggers when a POST request containing 'global.login', 'clientType: NetKeyboard', and 'loginType: Direct' is observed, which allows unauthorized access by manipulating authentication parameters.
Detects successful sign-in events flagged by the identity provider with risk indicators suggesting session token replay or theft. This includes anomalies such as unexpected token issuers, suspicious browsers, or unfamiliar device features, which are characteristic of session cookie theft and replay attacks.
This rule detects an attempt to exploit CVE-2021-33045, an authentication bypass vulnerability in certain Dahua products. An attacker can bypass authentication by sending a crafted HTTP POST request to the application, specifically using a loopback authentication type with a local IP address (127.0.0.1) in the login payload.
Detects DNS queries to known malicious subdomains and direct TCP connections to an IP address associated with the SilkParasite, NodeEdgeRAT, and NomadRAT malware infrastructure. The rule specifically monitors for communication with identified C2 infrastructure hosts and legacy domain registration points.
Detects potential process injection attempts using PowerShell or CMD to execute memory manipulation operations. The rule identifies processes initiated in a suspended state that subsequently invoke Windows API calls such as WriteProcessMemory, NtUnmapViewOfSection, SetThreadContext, or ResumeThread, which are commonly associated with process hollowing or thread execution hijacking.
Detects 32-bit Windows PE files packed with UPX that exhibit a zeroed compile timestamp, a characteristic often associated with staged SalatStealer or XenoRAT binaries observed in Operation CameraSwarm.
This rule detects an attempted authentication bypass vulnerability (CVE-2021-33045) targeting Dahua NetKeyboard devices. The exploit involves a specific HTTP request structure to the 'global.login' endpoint, where the 'loginType' parameter is set to 'Loopback' and the 'ipAddr' is set to '127.0.0.1', attempting to leverage internal loopback logic to circumvent authentication mechanisms.
This rule detects unauthorized memory modification of ntdll.dll, specifically targeting the EtwEventWrite function, by identifying processes writing to memory regions with execution-permission flags (e.g., PAGE_EXECUTE_READWRITE). This behavior is characteristic of adversaries attempting to blind Event Tracing for Windows (ETW) telemetry, often following suspicious .NET assembly loading (such as Assembly.Load) typical of malware loaders like LausivLoader.
Detects instances where end users grant high-risk delegated permissions (e.g., Mail.Read, Files.ReadWrite.All) to applications via OAuth consent flows outside of standard administrator approval processes. This behavior is indicative of device-code phishing or consent phishing campaigns designed to gain unauthorized access to user data.
Detects instances where an existing, non-interactive SSO session token is reused from a suspicious network location, such as an anonymizing proxy, VPN, or VPS, or triggered by an impossible travel risk event. The rule specifically looks for token usage that lacks a fresh interactive Multi-Factor Authentication (MFA) challenge, a common indicator of session token hijacking or 'replay' attacks frequently used in cloud account takeover campaigns.
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