Azure Sentinel
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These queries check telemetry from the Exploit Guard rule: Rule: Block Office applications from creating child processes.
(Rule ID d4f940ab-401b-4efc-aadc-ad5f3c50688a).
Read more about it here: https://docs.microsoft.com/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.
Oftentimes organizations enable this rule in audit mode and check the results before setting block mode.
You can use query #2 to measure the rule impact on your network in audit mode before turning it to block mode.
Query #1 is used after setting it to block mode - to analyze the block stats.
Tags: #ASR.
Query #1: block stats.
(Rule ID d4f940ab-401b-4efc-aadc-ad5f3c50688a).
Read more about it here: https://docs.microsoft.com/windows/security/threat-protection/windows-defender-exploit-guard/attack-surface-reduction-exploit-guard.
Oftentimes organizations enable this rule in audit mode and check the results before setting block mode.
You can use query #2 to measure the rule impact on your network in audit mode before turning it to block mode.
Query #1 is used after setting it to block mode - to analyze the block stats.
Tags: #ASR.
Query #1: block stats.
Simple query to show the unique network connections that were audited or blocked by ExploitGuard.
For more questions on this query, feel free to ping @FlyingBlueMonki on twitter or mattegen@microsoft.com via email.
For more questions on this query, feel free to ping @FlyingBlueMonki on twitter or mattegen@microsoft.com via email.
This query was originally published in the threat analytics report, Trickbot: Pervasive & underestimated.
Trickbot is a very prevalent piece of malware with an array of malicious capabilities. Originally designed to steal banking credentials, it has since evolved into a modular trojan that can deploy other malware, disable security software, and perform command-and-control (C2) operations.
Trickbot is frequently spread through email. An attacker will send a target a message with an attachment containing a malicious macro. If the target enables the macro, it will write a JScript Encoded (JSE) file to disk (JScript is a Microsoft dialect of ECMAScript). The JSE file will then be launched using wscript.exe to perform a variety of malicious tasks, particularly reconnaissance.
The following query detects when Office applications have launched wscript.exe to run a JSE file.
See Detect rundll.exe being used for reconnaissance and command-and-control for another query related to Trickbot activity.
Reference - https://attack.mitre.org/software/S0266/
Trickbot is a very prevalent piece of malware with an array of malicious capabilities. Originally designed to steal banking credentials, it has since evolved into a modular trojan that can deploy other malware, disable security software, and perform command-and-control (C2) operations.
Trickbot is frequently spread through email. An attacker will send a target a message with an attachment containing a malicious macro. If the target enables the macro, it will write a JScript Encoded (JSE) file to disk (JScript is a Microsoft dialect of ECMAScript). The JSE file will then be launched using wscript.exe to perform a variety of malicious tasks, particularly reconnaissance.
The following query detects when Office applications have launched wscript.exe to run a JSE file.
See Detect rundll.exe being used for reconnaissance and command-and-control for another query related to Trickbot activity.
Reference - https://attack.mitre.org/software/S0266/
This query checks for alerts related to file drop and remote execution where the file name matches PsExec and similar tools used for distribution
Looks for potential instances of bitlocker modifying registry settings to allow encryption, where it's executed via a .bat file.
This query checks for attempts to delete data on multiple drives using cipher.exe. This activity is typically done by ransomware to prevent recovery of data after encryption.
This query visualises the total amount of admin false negative submissions by the state of the submission.
Total Submissions by Submission State
This query visualises the original detection technology of emails submitted as phish false positive by admins
In this query, we hunt for inbound emails delivered having URLs from QR codes
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