Ibrahim Saud
@tektrixIndiaCompletionist
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Detects the creation of scheduled tasks that contain the string 'Google Chrome Update' in the command line, but are not associated with the legitimate GoogleUpdate.exe binary. This is a common technique used by malware to establish persistence by masquerading as a legitimate update process.
Detects rapid rotation of multiple unique IP addresses originating from the same user account shortly after a device code authentication event. This behavior is indicative of threat actors using proxy rotation services (like FlashProxy) to obfuscate their origin and bypass location-based security controls or impossible-travel detections after hijacking a session.
Detects periodic outbound network connections (beaconing) from internal hosts to external networks that exhibit patterns consistent with BabylonRAT malware. This rule monitors for a specific threshold of connection attempts over time, which is characteristic of a C2 heartbeat.
This rule detects potential BabylonRAT malware samples by identifying a combination of dynamic API resolution techniques (using GetProcAddress and LoadLibrary) and XOR-obfuscated string blocks representing critical DLL and API names. The detection utilizes high file entropy and specific artifact strings to identify binaries attempting to evade static analysis.
Detects a suspicious sequence of events where a user initiates a device code authorization flow, immediately followed by a Microsoft Authentication Broker sign-in using the 'sso_reload=true' parameter. This pattern is indicative of an attacker hijacking the device code authorization process to gain unauthorized access to a user's session.
Detects the creation of a Windows scheduled task named 'Google Chrome Update' where the command-line action does not point to the legitimate GoogleUpdate.exe binary. This behavior is indicative of persistence mechanisms used by threat actors, notably the Kimsuky group, to masquerade malicious tasks as legitimate software updaters.
Detects persistence mechanisms associated with BabylonRAT that utilize Windows Registry Run or RunOnce keys. The rule specifically identifies instances where a file named 'firefox.exe' is executed from the 'ProgramData' directory, which is a common indicator of a masqueraded malicious binary attempting to achieve persistence.
This rule detects successful device-code authorization logins to Azure AD that originate from a country or region not previously associated with the user. It evaluates the user's historical sign-in locations to establish a baseline and flags deviations, which may indicate account compromise via device-code phishing or MFA bypass attempts.
This rule detects suspicious Azure AD sign-in activity originating from a single user account that utilizes the 'deviceCode' authentication protocol while simultaneously exhibiting activity from multiple distinct and highly specific User Agent strings (Python requests library and Microsoft Outlook 16.0.17425). This pattern is indicative of potential token theft or automated credential harvesting where a legitimate OAuth flow is subverted to gain persistent access.
This rule detects PowerShell commands or script blocks that enumerate running processes and query WMI/CIM classes (such as Win32_ComputerSystem or Win32_BIOS) to identify indicators of virtualization, sandboxing, or the presence of security analysis tools. This behavior is indicative of anti-analysis and sandbox-evasion techniques, commonly used by threat actors like Kimsuky to verify their execution environment before proceeding with malicious activity.
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