Rudra Verma
@RudravermaTrusted contributorCompletionist
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108 detections
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This rule detects attempts to perform a mass device wipe or deletion using Microsoft Intune. It identifies devices that have been wiped or deleted within the last 24 hours and enriches this information with device details such as name, user, OS, and ownership. This can indicate a destructive attack or an attempt to remove evidence.
This rule detects high-volume access to Azure Key Vault secrets, keys, or certificates within a one-hour window. It specifically looks for successful read operations on secrets, keys, and certificates, as well as modifications to access policies. A high volume (more than 10 accesses) from a single caller within an hour is flagged as potential credential harvesting.
Microsoft Threat Intelligence observed Russian military Intelligence actor Seashell Blizzard conduct a phishing campaign using Excel attachments embedded with the custom CheapShot malware. CheapShot allows the actor to maintain persistence on targeted devices, likely to support intelligence collection. The actor primarily targeted critical infrastructure and key resources in Ukraine and Europe.
Search for events in your network and locate potential CheapShot malware- related indicators.
The file hashes are associated with CheapShot activity.
Search for events in your network and locate potential CheapShot malware- related indicators.
The file hashes are associated with CheapShot activity.
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 potential C2 beaconing behavior by identifying devices that make a high number of periodic outbound connections (20 or more within an hour) to a single external IP address on common web and C2-related ports (80, 443, 8080, 8443, 4444, 5555, 8888, 9001). The rule summarizes these connections by device, remote IP, and initiating process, highlighting sustained communication patterns indicative of command and control.
This rule detects suspicious device enrollment attempts via Microsoft Intune Company Portal from a country not previously observed in a user's 7-day sign-in history. It identifies two primary patterns: sustained successful sign-ins from a new country, indicating a potential active session and successful device enrollment (High Severity), or Conditional Access Policy (CAP) blocked attempts from a new country, suggesting an attacker probing with stolen credentials (Medium Severity). The detection aims to identify identity theft leading to unauthorized device enrollment.
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 potential DNS tunneling or data exfiltration by identifying high volumes of DNS queries with unusually long subdomains from a single process on a device. It aggregates DNS connection inspection events, extracts the subdomain length, and then summarizes the count of queries, unique domains, and average subdomain length within a 10-minute window. An alert is triggered if the query count exceeds 100 or if more than 50 unique domains are observed, combined with subdomain lengths greater than 30 characters.
This rule detects anomalous mass device wipe or deletion activity in Microsoft Intune by comparing current activity against an actor's historical behavior. It identifies four patterns: first-time wipers with high volume, known actors statistically far above their norm (Z-score), thin-history actors exceeding their personal peak, and time-compressed bursts of wipes. The rule calculates a severity based on the volume and rate of wipes.
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.
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