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Find use of Alternate Data Streams (ADS) for anti-forensic purposes.
Alternate Data Streams execution.
Alternate Data Streams execution.
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 suspicious use of Alternate Data Streams (ADS), which may indicate an attempt to mask malicious activity. These campaigns have been known to deploy ransomware in-memory and exploit ADS.
The See also section below lists more queries related to techniques shared by these campaigns.
References:
https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
https://docs.microsoft.com/sysinternals/downloads/streams
In April of 2020, security researchers observed multiple ransomware campaigns using the same set of techniques.
The following query detects suspicious use of Alternate Data Streams (ADS), which may indicate an attempt to mask malicious activity. These campaigns have been known to deploy ransomware in-memory and exploit ADS.
The See also section below lists more queries related to techniques shared by these campaigns.
References:
https://www.microsoft.com/security/blog/2020/04/28/ransomware-groups-continue-to-target-healthcare-critical-services-heres-how-to-reduce-risk/
https://docs.microsoft.com/sysinternals/downloads/streams
Detects potential CSharp Streamer RAT loading a .NET executable image by identifying a specific file name pattern and path commonly associated with the tool. This rule looks for image loads from a temporary directory with a filename matching 'dat[0-9A-Z]{4}\.tmp'.
