General
Static task
static1
URLScan task
urlscan1
Sample
https://down.sandai.net/thunder11/XunLeiWebSetup11.2.5.1778dl.exe
Malware Config
Targets
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Target
https://down.sandai.net/thunder11/XunLeiWebSetup11.2.5.1778dl.exe
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Registers COM server for autorun
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Downloads MZ/PE file
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Drops file in Drivers directory
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Executes dropped EXE
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Modifies Windows Firewall
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Sets DLL path for service in the registry
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Loads dropped DLL
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
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Drops file in System32 directory
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