Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This query was originally published in the threat analytics report, Msiexec abuse.
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Msiexec.exe is a Windows component that installs files with the .msi extension. These kinds of files are Windows installer packages, and are used by a wide array of legitimate software. However, malicious actors can re-purpose msiexec.exe for living-off-the-land attacks, where they use legitimate system binaries on the compromised device to perform attacks.
The following query detects activity associated with misuse of msiexec.exe, particularly alongside mimikatz, a common credential dumper and privilege escalation tool.
Reference - https://www.varonis.com/blog/what-is-mimikatz/
Files with well-known filenames (sensitive files with credential data) copying
PowerShell SAM Copy
Sigma
Detects suspicious PowerShell scripts accessing SAM hives
Files with well-known filenames (sensitive files with credential data) copying
Detects the usage of "reg.exe" in order to dump sensitive registry hives. This includes SAM, SYSTEM and SECURITY hives.
Shadow Copies storage symbolic link creation using operating systems utilities
Detects a dump file written by QuarksPwDump password dumper
Use this query to locate processes executing credential theft activity, often LaZagne in ransomware compromises.
Shadow Copies creation using operating systems utilities, possible credential access
Detects the usage of "reg.exe" in order to dump sensitive registry hives. This includes SAM, SYSTEM and SECURITY hives.
Detects usage of the Quarks PwDump tool via commandline arguments
Detects the volume shadow copy service initialization and processing via esentutl. Registry keys such as HKLM\\System\\CurrentControlSet\\Services\\VSS\\Diag\\VolSnap\\Volume are captured.
Detects events from the Kernel-General ETW indicating that the access bits of a hive with a system like hive name located in the temp directory have been reset.
This occurs when an application tries to access a hive and the hive has not be recognized since the last 7 days (by default).
Registry hive dumping utilities such as QuarksPwDump were seen emitting this behavior.
This occurs when an application tries to access a hive and the hive has not be recognized since the last 7 days (by default).
Registry hive dumping utilities such as QuarksPwDump were seen emitting this behavior.
Detects volume shadow copy mount via Windows event log
Detects powershell scripts that import modules from suspicious directories
Transferring files with well-known filenames (sensitive files with credential data) using network shares
Detects the registration of the security event source VSSAudit. It would usually trigger when volume shadow copy operations happen.
Detects usage of the Quarks PwDump tool via commandline arguments
Detects the volume shadow copy service initialization and processing via esentutl. Registry keys such as HKLM\\System\\CurrentControlSet\\Services\\VSS\\Diag\\VolSnap\\Volume are captured.
Assuming that you have a machine that is properly BitLocker'ed, then
the machine will need to be running to extract the SAM and SYSTEM
files.
This first query looks for any access to the HKLM that happens via a command
or script that is not executed by system.
The second query looks for usage of reg or regedit by anyone who is not system.
the machine will need to be running to extract the SAM and SYSTEM
files.
This first query looks for any access to the HKLM that happens via a command
or script that is not executed by system.
The second query looks for usage of reg or regedit by anyone who is not system.
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 the technique these attackers have used in the past to dump credentials.
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 the technique these attackers have used in the past to dump credentials.
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
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