Ibrahim Saud
@tektrixIndiaCompletionist
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11,679 detections
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Detects instances where an alert marked as process injection (T1055) involves an action process that is unsigned and differs from the actor process image, suggesting potential execution of an unauthorized or malicious payload masked by process injection techniques.
Detects the abuse of Windows Management Instrumentation (WMI) to execute processes via wmic.exe or WmiPrvSE.exe, often combined with obfuscated command-line arguments such as encoded PowerShell or CMD commands.
Detects the abuse of built-in Windows binaries 'regsvr32.exe' and 'msbuild.exe' for proxy execution. Specifically, it flags 'regsvr32.exe' loading remote scriptlets via HTTP and 'msbuild.exe' processing project files containing inline tasks, which are common techniques used to execute arbitrary malicious code while bypassing security controls.
Detects attempts to create a memory dump of the Local Security Authority Subsystem Service (LSASS) using either the built-in 'comsvcs.dll' library via 'rundll32.exe' or by requesting specific sensitive process access rights to 'lsass.exe' from unauthorized processes.
This rule detects attempts to steal the Active Directory database (ntds.dit) and associated security files by creating volume shadow copies using native Windows utilities like ntdsutil, vssadmin, or wmic. It also monitors for direct file system access or creation attempts related to these sensitive database files within shadow copy paths.
Detects anomalous Kerberos Ticket Granting Service (TGS) requests from a single user account and IP within a 10-minute window. It specifically flags accounts requesting a high volume of TGS tickets or accessing multiple distinct services, where the tickets use RC4 encryption (0x17), which is a characteristic of Kerberoasting attacks targeting service accounts.
Detects the creation or modification of Exchange Online inbox rules that configure automatic email forwarding or redirection to an external domain. The rule specifically flags if the action also involves deleting or hiding the message, which is a common persistence and exfiltration technique used in Business Email Compromise (BEC) attacks. The detection also incorporates correlation with recent high-risk sign-in activity for the associated user account.
This rule identifies suspicious Kerberos activity indicative of Golden or Silver Ticket attacks. It monitors for service ticket (4769) requests that occur without a preceding TGT request (4768) within a specified window, detects RC4 encryption downgrades on Kerberos requests in environments expected to use AES, and identifies tickets containing non-standard TicketOptions commonly associated with automated forgery tools like Mimikatz.
This rule detects potentially malicious PowerShell activity by identifying common obfuscation patterns, including encoded commands (Base64), IEX (Invoke-Expression) download cradles, and execution with hidden windows. It triggers when multiple suspicious flags are present or when an unusually long encoded blob is identified in script blocks, command lines, or process arguments.
Detects the execution of mshta.exe with arguments pointing to remote URLs or containing JavaScript. This behavior is commonly associated with phishing campaigns where attackers use fake CAPTCHA lures to trick users into executing malicious scripts via mshta.exe, often launched directly from Windows Explorer (e.g., from a downloaded file).
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