Azure Sentinel
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'This query identifies when a process execution command-line indicates that a registry value is written to allow for later execution a malicious script
References: https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/'
References: https://www.microsoft.com/security/blog/2021/03/04/goldmax-goldfinder-sibot-analyzing-nobelium-malware/'
'The query below identifies powershell commands used by the threat actor Mango Sandstorm.
Reference: https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/'
Reference: https://www.microsoft.com/security/blog/2022/08/25/mercury-leveraging-log4j-2-vulnerabilities-in-unpatched-systems-to-target-israeli-organizations/'
'This query looks for suspicious request patterns to Exchange servers that fit patterns recently blogged about by PeterJson. This exploitation chain utilises an SSRF vulnerability in Exchange which eventually allows the attacker to execute arbitrary Powershell on the server.
In the example powershell can be used to write an email to disk with an encoded attachment containing a shell.
Reference: https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1'
In the example powershell can be used to write an email to disk with an encoded attachment containing a shell.
Reference: https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1'
BazaCall is a campaign that manipulate users into calling a customer support center, where they are instructed to download an Excel file to unsubscribe from a phony service. When the user opens the Excel file, they are prompted to enable a malicious macro that infects their device with BazaLoader.
This query hunts for an attacker-created copy of certutil.exe, a legitimate process, which the macro uses to download BazaLoader.
This query hunts for an attacker-created copy of certutil.exe, a legitimate process, which the macro uses to download BazaLoader.
Microsoft has observed attackers who have gained entry to an environment via the Log4J vulnerability utilizing the ws_TomcatService.exe process to launch malicious processes.
LemonDuck is an actively updated and robust malware primarily known for its botnet and cryptocurrency mining objectives. First discovered in 2019, LemonDuck has since adopted more sophisticated behavior and escalated its operations in 2021. Today, beyond using resources for its traditional bot and mining activities, LemonDuck steals credentials, removes security controls, spreads via emails, moves laterally, and ultimately drops more tools for human-operated activity.
StrRAT is a Java-based remote access tool which steals browser credentials, logs keystrokes and take remote control of infected systems. It also has a module to download additional payload onto to the infected machine based on C2 server command. Additionally, this threat also has a ransomware encryption/decryption module which appends .crimson extension.
This query looks for Entra ID role adds identified by Microsoft Defender for Cloud Apps. It will require an corresponding app connector in Microsoft Defender for Cloud Apps.
User accounts may be created to achieve persistence on a machine.
Read more here: https://attack.mitre.org/wiki/Technique/T1136.
Tags: #CreateAccount.
Query #1: Query for users being created using "net user" command.
"net user" commands are noisy, so needs to be joined with another signal -.
E.g. in this example we look for use of uncommon & undocumented commandline switches (e.g. /ad instead of /add).
Read more here: https://attack.mitre.org/wiki/Technique/T1136.
Tags: #CreateAccount.
Query #1: Query for users being created using "net user" command.
"net user" commands are noisy, so needs to be joined with another signal -.
E.g. in this example we look for use of uncommon & undocumented commandline switches (e.g. /ad instead of /add).
This query detects possible abuse of ms-msdt MSProtocol URI scheme to load and execute malicious code via Microsoft Support Diagnostic Tool Vulnerability (CVE-2022-30190).
The following query detects when Microsoft Office software spawns an instance of the MSDT utility, msdt.exe.
References:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30190
https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
https://www.huntress.com/blog/microsoft-office-remote-code-execution-follina-msdt-bug
https://attack.mitre.org/techniques/T1221/
The following query detects when Microsoft Office software spawns an instance of the MSDT utility, msdt.exe.
References:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30190
https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
https://www.huntress.com/blog/microsoft-office-remote-code-execution-follina-msdt-bug
https://attack.mitre.org/techniques/T1221/
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