Azure Sentinel
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Query 1 shows you any network communication happened from endpoints to a specific Remote IP or Remote URL.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
Ensure to update RemoteIP and RemoteURL variable.
For questions @MiladMSFT on Twitter or milad.aslaner@microsoft.com by email.
Looks for suspicious addition of command interpreters to windows registry.
Author: Jouni Mikkola
References:
https://threathunt.blog/registry-hunts/
Author: Jouni Mikkola
References:
https://threathunt.blog/registry-hunts/
This query was originally published in the threat analytics report, Ransomware continues to hit healthcare, critical services. There is also a related blog.
In April of 2020, security researchers observed multiple ransomware campaigns using the same set of techniques.
The following query detects the use of the tool cipher.exe to delete indicators of malicious activity right before encrypting a drive.
The See also section below lists more queries related to techniques shared by these campaigns.
Reference - https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
In April of 2020, security researchers observed multiple ransomware campaigns using the same set of techniques.
The following query detects the use of the tool cipher.exe to delete indicators of malicious activity right before encrypting a drive.
The See also section below lists more queries related to techniques shared by these campaigns.
Reference - https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
https://github.com/jischell-msft/RemoteManagementMonitoringTools
https://github.com/jischell-msft/RemoteManagementMonitoringTools
Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
https://github.com/jischell-msft/RemoteManagementMonitoringTools
https://github.com/jischell-msft/RemoteManagementMonitoringTools
Remote Monitoring and Management (RMM) programs are IT to manage remote endpoints. Attackers have begun to abuse these programs to persist or provide C2 channels.
https://github.com/jischell-msft/RemoteManagementMonitoringTools
https://github.com/jischell-msft/RemoteManagementMonitoringTools
First query digs in print spooler drivers folder for any file creations,
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Unsigned files
or ones that don't have any relations to printers that you are using are
suspicious.
Second query that can be used for finding client machines that
could be operating print servers or file servers is also included here.
As additional mitigation for the exploit you might want to block the
incoming traffic to the SMB or EPMAP Ports (445) if you need to keep the
spooler service running to print from clients.
MANY OF THE FILES THAT SHOULD COME UP HERE MAY BE LEGIT. Unsigned files
or ones that don't have any relations to printers that you are using are
suspicious.
Second query that can be used for finding client machines that
could be operating print servers or file servers is also included here.
As additional mitigation for the exploit you might want to block the
incoming traffic to the SMB or EPMAP Ports (445) if you need to keep the
spooler service running to print from clients.
c2-bluekeep
KQL
This query was originally published in the threat analytics report, Exploitation of CVE-2019-0708 (BlueKeep).
CVE-2019-0708, also known as BlueKeep, is a critical remote code execution vulnerability involving RDP. Soon after its disclosure, the NSA issued a rare advisory about this vulnerability, out of concern that it could be used to quickly spread malware. Attackers have since used this vulnerability to install cryptocurrency miners on targets.
Microsoft has issued updates for this vulnerability, as well as guidance for protecting operating systems that we no longer support. Microsoft Defender ATP also contains behavioral detections for defending against this threat.
The following query locates devices that have communicated with attacker infrastructure associated with BlueKeep-related cryptomining.
References:
https://nvd.nist.gov/vuln/detail/CVE-2019-0708
https://www.nsa.gov/News-Features/News-Stories/Article-View/Article/1865726/nsa-cybersecurity-advisory-patch-remote-desktop-services-on-legacy-versions-of/
https://www.wired.com/story/bluekeep-hacking-cryptocurrency-mining/
https://portal.msrc.microsoft.com/security-guidance/advisory/CVE-2019-0708
https://support.microsoft.com/help/4500705/customer-guidance-for-cve-2019-0708
https://www.microsoft.com/security/blog/2019/11/07/the-new-cve-2019-0708-rdp-exploit-attacks-explained/
CVE-2019-0708, also known as BlueKeep, is a critical remote code execution vulnerability involving RDP. Soon after its disclosure, the NSA issued a rare advisory about this vulnerability, out of concern that it could be used to quickly spread malware. Attackers have since used this vulnerability to install cryptocurrency miners on targets.
Microsoft has issued updates for this vulnerability, as well as guidance for protecting operating systems that we no longer support. Microsoft Defender ATP also contains behavioral detections for defending against this threat.
The following query locates devices that have communicated with attacker infrastructure associated with BlueKeep-related cryptomining.
References:
https://nvd.nist.gov/vuln/detail/CVE-2019-0708
https://www.nsa.gov/News-Features/News-Stories/Article-View/Article/1865726/nsa-cybersecurity-advisory-patch-remote-desktop-services-on-legacy-versions-of/
https://www.wired.com/story/bluekeep-hacking-cryptocurrency-mining/
https://portal.msrc.microsoft.com/security-guidance/advisory/CVE-2019-0708
https://support.microsoft.com/help/4500705/customer-guidance-for-cve-2019-0708
https://www.microsoft.com/security/blog/2019/11/07/the-new-cve-2019-0708-rdp-exploit-attacks-explained/
'Query over SigninLogs summarizes login attempts per hour on weekdays. Kusto anomaly detection finds login spikes. Calculates percentage change between anomalous period and average logins. Determines success and failure rate for logins for 1 hour period.'
'This identifies when a user account successfully logs onto a given App and within 1 minute fails to logon to a different App.
This may indicate a malicious attempt at accessing disallowed Apps for discovery or potential lateral movement'
This may indicate a malicious attempt at accessing disallowed Apps for discovery or potential lateral movement'
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