Azure Sentinel
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'This query will detect paths suspicious associated with ProxyLogon exploitation, it will then calculate the percentage of suspicious URIs
the user had visited in relation to the total number of URIs the user has visited. This query will assist in the detection of automated
ProxyLogon exploitation.'
the user had visited in relation to the total number of URIs the user has visited. This query will assist in the detection of automated
ProxyLogon exploitation.'
'Looks for activity that might indicate exploitation of the ProxyToken vulnerability - CVE-2021-33766
Ref: https://www.zerodayinitiative.com/blog/2021/8/30/proxytoken-an-authentication-bypass-in-microsoft-exchange-server'
Ref: https://www.zerodayinitiative.com/blog/2021/8/30/proxytoken-an-authentication-bypass-in-microsoft-exchange-server'
'This alerts when a client IP connects with 1-15 different useragents in less than 1 hour. Limited to 50 or less connections to avoid high traffic. May indicate malicious activity as a probing method.'
This query was originally published in the threat analytics report, RDP ransomware persists as Wadhrama.
The ransomware known as Wadhrama has been used in human-operated attacks that follow a particular pattern. The attackers often use Remote Desktop Protocol (RDP) to gain initial access to a device or network, exfiltrate credentials, and maintain persistance.
The following query checks for possible Wadhrama-related activity, by detecting any use of Windows Management Instrumentation command-line utility, or WMIC, to delete local backups. The attackers often delete all local backups on an infected device before actually running the ransomware.
Other techniques used by the group associated with Wadhrama are listed under See also.
Reference - https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Wadhrama
The ransomware known as Wadhrama has been used in human-operated attacks that follow a particular pattern. The attackers often use Remote Desktop Protocol (RDP) to gain initial access to a device or network, exfiltrate credentials, and maintain persistance.
The following query checks for possible Wadhrama-related activity, by detecting any use of Windows Management Instrumentation command-line utility, or WMIC, to delete local backups. The attackers often delete all local backups on an infected device before actually running the ransomware.
Other techniques used by the group associated with Wadhrama are listed under See also.
Reference - https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Wadhrama
This query was originally published in the threat analytics report, May 2019 0-day disclosures.
In May and June of 2019, a security researcher with the online alias, SandboxEscaper, discovered and published several elevation-of-privilege vulnerabilities on Github. The researcher included proofs-of-concept demonstrating how to exploit these vulnerabilities.
Patches and more information about each vulnerability are available below:
1. CVE-2019-0863 | Windows Error Reporting Elevation of Privilege Vulnerability
2. CVE-2019-1069 | Task Scheduler Elevation of Privilege Vulnerability
3. CVE-2019-1053 | Windows Shell Elevation of Privilege Vulnerability
4. CVE-2019-1064 | Windows Elevation of Privilege Vulnerability
5. CVE-2019-0973 | Windows Installer Elevation of Privilege Vulnerability
6. CVE-2019-1129 | Windows Elevation of Privilege Vulnerability
This query locates possible activity that exploits CVE-2019-0973 (also known as InstallerBypass), the fifth vulnerability listed above.
Reference - https://threatpost.com/sandboxescaper-more-exploits-ie-zero-day/145010/
In May and June of 2019, a security researcher with the online alias, SandboxEscaper, discovered and published several elevation-of-privilege vulnerabilities on Github. The researcher included proofs-of-concept demonstrating how to exploit these vulnerabilities.
Patches and more information about each vulnerability are available below:
1. CVE-2019-0863 | Windows Error Reporting Elevation of Privilege Vulnerability
2. CVE-2019-1069 | Task Scheduler Elevation of Privilege Vulnerability
3. CVE-2019-1053 | Windows Shell Elevation of Privilege Vulnerability
4. CVE-2019-1064 | Windows Elevation of Privilege Vulnerability
5. CVE-2019-0973 | Windows Installer Elevation of Privilege Vulnerability
6. CVE-2019-1129 | Windows Elevation of Privilege Vulnerability
This query locates possible activity that exploits CVE-2019-0973 (also known as InstallerBypass), the fifth vulnerability listed above.
Reference - https://threatpost.com/sandboxescaper-more-exploits-ie-zero-day/145010/
// 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
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.
Use this query to find Excel launching anomalous processes congruent with Qakbot payloads which contain additional markers from recent Qakbot executions.
The presence of such anomalous processes indicate that the payload was delivered and executed, though reconnaissance and successful implantation hasn't been completed yet.
The presence of such anomalous processes indicate that the payload was delivered and executed, though reconnaissance and successful implantation hasn't been completed yet.
Original Sigma Rule: https://github.com/Neo23x0/sigma/blob/master/rules/apt/apt_ta17_293a_ps.yml.
Questions via Twitter: @janvonkirchheim.
Questions via Twitter: @janvonkirchheim.
This query was originally published in the threat analytics report, Solorigate supply chain attack. Please note that these attacks are currently known as the Nobelium campaign.
Microsoft detects the 2020 SolarWinds supply chain attack implant and its other components as part of a campaign by the Nobelium activity group. Nobelium is the threat actor behind the attack against SolarWinds, which was previously referred to as Solorigate.
Nobelium silently added malicious code to legitimate software updates for Orion, which is IT monitoring software provided by SolarWinds. In this way, malicious dynamic link libraries (DLLs) were distributed to SolarWinds customers.
The following query detects events when SolarWinds processes attempted to launch the cmd.exe command prompt using the 'echo' command. Using 'echo' in this way is suspicious, as it is an indirect way of issuing commands, and may not be readily detected by certain kinds of security solutions.
More Nobelium-related queries can be found listed under the See also section of this document.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://www.microsoft.com/security/blog/2020/12/18/analyzing-solorigate-the-compromised-dll-file-that-started-a-sophisticated-cyberattack-and-how-microsoft-defender-helps-protect/
https://docs.microsoft.com/windows-server/administration/windows-commands/cmd
Microsoft detects the 2020 SolarWinds supply chain attack implant and its other components as part of a campaign by the Nobelium activity group. Nobelium is the threat actor behind the attack against SolarWinds, which was previously referred to as Solorigate.
Nobelium silently added malicious code to legitimate software updates for Orion, which is IT monitoring software provided by SolarWinds. In this way, malicious dynamic link libraries (DLLs) were distributed to SolarWinds customers.
The following query detects events when SolarWinds processes attempted to launch the cmd.exe command prompt using the 'echo' command. Using 'echo' in this way is suspicious, as it is an indirect way of issuing commands, and may not be readily detected by certain kinds of security solutions.
More Nobelium-related queries can be found listed under the See also section of this document.
References:
https://msrc-blog.microsoft.com/2020/12/13/customer-guidance-on-recent-nation-state-cyber-attacks/
https://www.microsoft.com/security/blog/2020/12/18/analyzing-solorigate-the-compromised-dll-file-that-started-a-sophisticated-cyberattack-and-how-microsoft-defender-helps-protect/
https://docs.microsoft.com/windows-server/administration/windows-commands/cmd
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