Azure Sentinel
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'Detects the redirect URL of an app being changed.
Applications associated with URLs not controlled by the organization can pose a security risk.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#application-configuration-changes'
Applications associated with URLs not controlled by the organization can pose a security risk.
Ref: https://docs.microsoft.com/azure/active-directory/fundamentals/security-operations-applications#application-configuration-changes'
'This detection uses Security events from the "AD FS Auditing" provider to detect suspicious object identifiers (OIDs) as part EventID 501 and specifically part of the Enhanced Key Usage attributes.
This query checks to see if you have any new OIDs in the last hour that have not been seen in the previous day. New OIDs should be validated and OIDs that are very long, as indicated
by the OID_Length field, could also be an indicator of malicious activity.
In order to use this query you need to enable AD FS auditing on the AD FS Server.
References:
https://www.microsoft.com/security/blog/2022/08/24/magicweb-nobeliums-post-compromise-trick-to-authenticate-as-anyone/
https://docs.microsoft.com/windows-server/identity/ad-fs/troubleshooting/ad-fs-tshoot-logging
'
This query checks to see if you have any new OIDs in the last hour that have not been seen in the previous day. New OIDs should be validated and OIDs that are very long, as indicated
by the OID_Length field, could also be an indicator of malicious activity.
In order to use this query you need to enable AD FS auditing on the AD FS Server.
References:
https://www.microsoft.com/security/blog/2022/08/24/magicweb-nobeliums-post-compromise-trick-to-authenticate-as-anyone/
https://docs.microsoft.com/windows-server/identity/ad-fs/troubleshooting/ad-fs-tshoot-logging
'
'This hunting query looks for file paths/hashes related to observed activity by Dev-0228. The actor is known to use custom version of popular tool like PsExec, Procdump etc. to carry its activity.
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.'
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.'
'This query looks for messages related to file downloads of suspicious file types. This query uses the Exchange HttpProxy AOBGeneratorLog, you will need to onboard this log as a custom log under the table http_proxy_oab_CL before using this query.
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
Reference: https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/'
Identifies SolarWinds SUNBURST and SUPERNOVA backdoor file hash IOCs in File Events
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimFileEvent)
References:
- https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html
- https://gist.github.com/olafhartong/71ffdd4cab4b6acd5cbcd1a0691ff82f
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimFileEvent)
References:
- https://www.fireeye.com/blog/threat-research/2020/12/evasive-attacker-leverages-solarwinds-supply-chain-compromises-with-sunburst-backdoor.html
- https://gist.github.com/olafhartong/71ffdd4cab4b6acd5cbcd1a0691ff82f
'Powercat is a PowerShell implementation of netcat. Whilst it can be used as a legitimate administrative tool it can be abused by attackers to exfiltrate data. This query looks for command line activity downloading PowerCat.'
'Invoke-PowerShellTcpOneLine is a PowerShell script to create a simple and small reverse shell. It can be abused by attackers to exfiltrate data. This query looks for command line activity similar to Invoke-PowerShellTcpOneLine.'
// Author: jan geisbauer
// @janvonkirchheim
// ------------------------
// 1. A list of all devices that have this vulnerability
// 2. A list of all users that uses those devices
// 3. If these users received .mkv files recently
// @janvonkirchheim
// ------------------------
// 1. A list of all devices that have this vulnerability
// 2. A list of all users that uses those devices
// 3. If these users received .mkv files recently
The "Stolen Images" Bazarloader campaign uses fake copyright infingement contact form emails and malicious files pretending to contain "stolen images" to trick users into downloading the malware.
The pw protected zip attachment -> Word doc delivery method of Bazarloader utilizes Word to create an .hta file and launch it via MSHTA to connect to a malicious domain and pull down the Bazarloader paylaod.
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