Ibrahim Saud
@tektrixIndiaCompletionist
2 followers18,458 downloads7,116 copies47 likes38,524 views
11,679 detections
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Detects inbound Microsoft Teams calls or chats originating from an external or federated tenant where the caller's display name mimics internal IT support or helpdesk personnel, a technique used in social engineering and vishing campaigns.
Detects a sequence of events where a user's MFA configuration is modified (typically via a help-desk impersonation vishing attack) followed closely by a successful sign-in from a new IP address. This pattern is indicative of attackers hijacking sessions or stealing credentials by coercing victims into resetting MFA settings.
Detects outbound network connections (HTTP/TLS) from internal hosts to a known malicious IP address associated with Adversary-in-the-Middle (AiTM) phishing infrastructure, specifically targeting Microsoft 365 credential and session cookie theft.
Detects the execution of the RUSTYSHADE Rust-based backdoor, observed during Operation RapidRust, associated with the threat group APT36 (Transparent Tribe). The rule monitors for the specific 'DriverInstaller.exe' filename, known malicious file hashes, and suspicious command-line patterns involving PowerShell-based downloads of 'DriverInstaller.zip' from Backblaze cloud storage.
Detects the launch or execution of common remote access tools such as AnyDesk, TeamViewer, Quick Assist, or Microsoft Remote Assistance (msra.exe) on an endpoint, excluding instances where these tools act as the parent process. This rule serves as one component of a broader detection chain for potentially unauthorized remote access.
Detects the modification or creation of COM InProcServer32 registry keys within HKCU or HKU hives where the associated server value points to a DLL located in the AppData directory. This pattern is commonly used for persistence and privilege escalation via COM hijacking.
Detects a suspicious sequence of events suggesting potential technical support scam or social engineering activity: a rapid influx of emails (email bombing) followed by an external Microsoft Teams call, and subsequently the execution of a common remote access tool on the same host within a short timeframe.
Detects high-velocity, multi-application sign-in activity within a short timeframe (<= 15 minutes) originating from suspicious Python-based user agents (requests library). This pattern is often indicative of automated script-based reconnaissance or unauthorized access attempts against Microsoft 365 services.
Detects the installation of specific known malicious NPM packages (indexed-btree, btree-core, mutex-forge) or execution of npm install commands targeting these packages, which are indicative of software supply chain compromise attempts.
This rule monitors outbound TLS traffic to detect communication with public Slack or Telegram webhook APIs, which are commonly abused by malware or malicious Node.js/npm packages for data exfiltration or command-and-control (C2) operations.
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