Azure Sentinel
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'This query looks for new files being downloaded using Curl.'
Use this query to find email stealing activities ran by Qakbot that will use "ping.exe -t 127.0.0.1" to obfuscate subsequent actions.
Email theft that occurs might be exfiltrated to operators and indicates that the malware completed a large portion of its automated activity without interruption.
Email theft that occurs might be exfiltrated to operators and indicates that the malware completed a large portion of its automated activity without interruption.
This query was originally published in the threat analytics report, Ransomware continues to hit healthcare, critical services. There is also a related blog.
Robbinhood is ransomware that has been involved in several high-profile incidents, including a 2019 attack on the city of Baltimore, Maryland. Robbinhood operators often employ a distinctive defense evasion technique, where they load a vulnerable driver on to a target and exploit it, in order to turn off security software -- essentially using the driver as malware.
The following query detects if a device contains the vulnerable drivers. These are often, but not always, implanted on the target by operators seeking to use this technique to turn off security software.
For a query that detects a later stage of this technique, see Detect security evasion related to the Robbinhood ransomware campaign.
References:
https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Robinhood.A&ThreatID=2147735370
https://www.nytimes.com/2019/05/22/us/baltimore-ransomware.html
Robbinhood is ransomware that has been involved in several high-profile incidents, including a 2019 attack on the city of Baltimore, Maryland. Robbinhood operators often employ a distinctive defense evasion technique, where they load a vulnerable driver on to a target and exploit it, in order to turn off security software -- essentially using the driver as malware.
The following query detects if a device contains the vulnerable drivers. These are often, but not always, implanted on the target by operators seeking to use this technique to turn off security software.
For a query that detects a later stage of this technique, see Detect security evasion related to the Robbinhood ransomware campaign.
References:
https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
https://www.microsoft.com/wdsi/threats/malware-encyclopedia-description?Name=Ransom:Win32/Robinhood.A&ThreatID=2147735370
https://www.nytimes.com/2019/05/22/us/baltimore-ransomware.html
// Look for attempts to use fsutil.exe to delete file system logs that can be used as forensic artifacts.
This query was originally published in the threat analytics report, "Exchange Server zero-days exploited in the wild".
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query finds evidence of an Exchange PowerShell snap-in being loaded. This can indicate an attempt to exfiltrate data.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
In early March 2021, Microsoft released patches for four different zero-day vulnerabilities affecting Microsoft Exchange Server. The vulnerabilities were being used in a coordinated attack. For more information on the vulnerabilities, visit the following links:
1. CVE-2021-26855
2. CVE-2021-26857
3. CVE-2021-26858
4. CVE-2021-27065
The following query finds evidence of an Exchange PowerShell snap-in being loaded. This can indicate an attempt to exfiltrate data.
More queries related to this threat can be found under the See also section of this page.
Reference - https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
Get stats on ASR audit events - count events and machines per rule.
Get stats on ASR audit events - count events and machines per rule.
This query checks for attempts to stop at least 10 separate processes using the net stop command. Run query
This query helps reviewing list of top 10 URL domains attacking the organization
This query helps reviewing top targeted users with malware or phishing emails in an organization in last 30 days
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