Rudra Verma
@RudravermaTrusted contributorCompletionist
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108 detections
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This rule detects when a high-privilege role is assigned to a user in Azure Active Directory. It specifically looks for 'Add member to role', 'Add eligible member to role', or 'Add scoped member to role' operations that successfully assign one of a predefined list of privileged roles (e.g., Global Administrator, Security Administrator, Application Administrator) to a user. This activity can indicate privilege escalation or unauthorized access within an Azure AD environment.
This rule detects the creation of suspicious child processes by Microsoft Office applications. This behavior is commonly associated with malicious macros embedded in Office documents or phishing attacks that leverage Office documents to execute arbitrary commands. The rule specifically looks for Office applications (Word, Excel, PowerPoint, Outlook, OneNote, Publisher, Visio, Access) spawning known suspicious executables like command prompts, PowerShell, script interpreters (wscript, cscript), and various utility tools (mshta, regsvr32, rundll32, certutil, bitsadmin, wmic, schtasks, whoami, net, netsh, nslookup, curl).
This rule detects Microsoft Teams chat or call activity initiated by external users whose domains are not present in a pre-defined whitelist. It specifically looks for 'ChatCreated' or 'CallParticipantDetail' actions from external users and filters out activity from known, whitelisted external domains. This can help identify potentially unauthorized or suspicious communication with external entities.
This rule detects network connections or email URLs that match a list of known Indicators of Compromise (IOCs) associated with Signal-targeted phishing infrastructure and explicit phishing destination domains. These IOCs were identified in Unit 42's research on QR code attack vectors. The rule queries email URL information, URL click events, device network events, and common security logs (proxy/firewall/WAF) to identify activity related to these malicious domains.
This rule detects the creation of scheduled tasks (`schtasks.exe /create`) where the command line arguments contain suspicious executables or paths commonly associated with malicious activity. This indicates a potential persistence mechanism being established by an adversary.
This rule detects outbound network connections from devices to IP addresses identified as malicious by a threat intelligence feed. It joins device network events with threat intelligence indicators, specifically looking for successful connections or connection requests to IPs with a confidence score greater than 50. The alert provides details about the device, the remote IP, the initiating process, and the threat intelligence context.
This rule detects the execution of PsExec or similar tools (psexec.exe, psexec64.exe, paexec.exe) which are commonly used for lateral movement within a network. It also identifies the use of PsExec service (psexesvc.exe) or command-line arguments indicative of PsExec activity, such as accessing administrative shares (ADMIN$, C$, IPC$) or the '-accepteula' flag.
This rule detects network connections or DNS queries to a list of domains identified as phishing campaign infrastructure. These domains are associated with a 'Signal Phishing Campaign' and are likely used for malicious purposes such as credential harvesting or malware distribution. The rule checks for these domains in `RemoteUrl` or `DestinationHost` fields across various network-related logs.
This rule detects attempts to bypass User Account Control (UAC) by monitoring modifications or creations of specific registry keys. Adversaries often manipulate these registry keys to achieve privilege escalation without triggering a UAC prompt, allowing them to execute malicious code with elevated permissions. The rule specifically looks for changes to registry paths commonly abused in UAC bypass techniques, such as those related to ms-settings, mscfile, Environment\UserInitMprLogonScript, exefile, Folder, and Image File Execution Options.
This rule detects attempts to download Android Application Package (APK) files directly to an endpoint. This activity is often associated with 'quishing' (QR code phishing) attacks, where users are tricked into scanning a malicious QR code that leads to a direct APK download, bypassing official app store security checks. The rule specifically looks for network connection success events where the remote URL or additional fields contain '.apk'.
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