Azure Sentinel
@AzureSentinel50 followers944 downloads1,418 copies43 likes37,654 views
1,223 detections
Filters
Last updated
All Time
Detection languages
1,223
Categories
220
218
180
171
135
Platforms
766
284
188
78
29
Products / Services
492
297
159
152
93
MITRE Techniques
530
485
467
348
348
'The hunting query looks for suspicious files accessed on a IIS server that might indicate exfiltration hosting. This technique has been observed when exporting mailbox files from OWA servers.'
'Identifies when 100 or more failed attempts by a given user in 10 minutes occur on the IIS Server.
This could be indicative of attempted brute force based on known account information.
This could also simply indicate a misconfigured service or device.
References:
IIS status code mapping - https://support.microsoft.com/help/943891/the-http-status-code-in-iis-7-0-iis-7-5-and-iis-8-0
Win32 Status code mapping - https://msdn.microsoft.com/library/cc231199.aspx'
This could be indicative of attempted brute force based on known account information.
This could also simply indicate a misconfigured service or device.
References:
IIS status code mapping - https://support.microsoft.com/help/943891/the-http-status-code-in-iis-7-0-iis-7-5-and-iis-8-0
Win32 Status code mapping - https://msdn.microsoft.com/library/cc231199.aspx'
'The Exchange Powershell Snapin was loaded on a host, this allows for a Exchange server management via PowerShell.
Whilst this is a legitimate administrative tool it is abused by attackers to performs actions on a compromised
Exchange server. Hunt for unusual activity related to this Snapin including it being added on new hosts or by
new accounts.'
Whilst this is a legitimate administrative tool it is abused by attackers to performs actions on a compromised
Exchange server. Hunt for unusual activity related to this Snapin including it being added on new hosts or by
new accounts.'
This query was originally published in the threat analytics report, Multiple EOP flaws in Dell driver (CVE-2021-21551).
CVE-2021-21551 is a vulnerability found in dbutil_2_3.sys, a driver distributed with Dell firmware updates and tools. Attackers can exploit this vulnerability to escalate privileges on a compromised device. The following query can detect if the affected driver has been added to a device's \temp folders.
Reference - https://nvd.nist.gov/vuln/detail/CVE-2021-21551
CVE-2021-21551 is a vulnerability found in dbutil_2_3.sys, a driver distributed with Dell firmware updates and tools. Attackers can exploit this vulnerability to escalate privileges on a compromised device. The following query can detect if the affected driver has been added to a device's \temp folders.
Reference - https://nvd.nist.gov/vuln/detail/CVE-2021-21551
The following query detects possible CVE-2021-42278 exploitation by finding changes of device names in the network using Microsoft Defender for Identity
'Provides the Platform version and total count of up to date devices, not up to date devices and count of devices whose status is not available relevant to the Platform version.'
This query looks for Microsoft Defender Antivirus detections related to EUROPIUM actor
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of Oracle WebLogic being exploited to run a PowerShell script that downloads payloads.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of Oracle WebLogic being exploited to run a PowerShell script that downloads payloads.
Snip3 is a family of related remote access trojans. Although the malware in this family contain numerous small variations, they all exhibit similar behaviors and techniques.
The following query looks for potentially hollowed processes that may be used to facilitate command-and-control or exfiltration by Snip3 malware. This technique has been used in recent cases to exfiltrate data, including credentials.
The query may return additional malware or campaigns not necessarily associated with Snip3. However, Microsoft recommends triaging all non-benign results as potential malware.
The following query looks for potentially hollowed processes that may be used to facilitate command-and-control or exfiltration by Snip3 malware. This technique has been used in recent cases to exfiltrate data, including credentials.
The query may return additional malware or campaigns not necessarily associated with Snip3. However, Microsoft recommends triaging all non-benign results as potential malware.
These queries was originally published in the threat analytics report, Attacks on gov't, think tanks, NGOs.
As described further in Analysis of cyberattack on U.S. think tanks, non-profits, public sector by unidentified attackers, there was a very large spear-phishing campaign launched in November 2019.
The attackers would gain access to a target by having the user click on a link to a compromised website and download a .zip archive.
Once established on a target's device, the attackers used a malicious DLL named cyzfc.dat to execute additional payloads. They would call a function in the malicious DLL via the legitimate Windows process, rundll32.exe, to connect directly to their command-and-control (C2) servers.
The following queries detect activity associated with the malicious DLL, cyzfc.dat., used in this campaign.
Reference - https://docs.microsoft.com/windows-server/administration/windows-commands/rundll32
As described further in Analysis of cyberattack on U.S. think tanks, non-profits, public sector by unidentified attackers, there was a very large spear-phishing campaign launched in November 2019.
The attackers would gain access to a target by having the user click on a link to a compromised website and download a .zip archive.
Once established on a target's device, the attackers used a malicious DLL named cyzfc.dat to execute additional payloads. They would call a function in the malicious DLL via the legitimate Windows process, rundll32.exe, to connect directly to their command-and-control (C2) servers.
The following queries detect activity associated with the malicious DLL, cyzfc.dat., used in this campaign.
Reference - https://docs.microsoft.com/windows-server/administration/windows-commands/rundll32
Page 79 of 123