General
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Target
Calabiyau_Installer_Release_0.9.1.396_10439382.exe
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Size
163.4MB
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Sample
240408-bkat8scc87
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MD5
022b4707e26b6c4d965bb88cc2668b62
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SHA1
65c3c8ee02f6c37e0e71572800a9b7b967af2745
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SHA256
68cadea3071b42d42bd81a4f84c61609494c9e04d016c070f410111c3b8c8bef
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SHA512
34faff8695cf85c2001bdd1466bd2be6506b9ae4667e196c1ec23d5ecb72a97efc69a502a3886aa648801ba9247e90a0fd0a08ae1c3985d5e05515e88792aba4
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SSDEEP
3145728:t8aKWcoPkyA4sWnh3N9NX61z5UBrL4CnYCdTwA39QB:t8lWcoPO4sWhpX6UBf/vcY9QB
Static task
static1
Behavioral task
behavioral1
Sample
Calabiyau_Installer_Release_0.9.1.396_10439382.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
Calabiyau_Installer_Release_0.9.1.396_10439382.exe
Resource
win10v2004-20240226-en
Malware Config
Targets
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Target
Calabiyau_Installer_Release_0.9.1.396_10439382.exe
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Size
163.4MB
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MD5
022b4707e26b6c4d965bb88cc2668b62
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SHA1
65c3c8ee02f6c37e0e71572800a9b7b967af2745
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SHA256
68cadea3071b42d42bd81a4f84c61609494c9e04d016c070f410111c3b8c8bef
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SHA512
34faff8695cf85c2001bdd1466bd2be6506b9ae4667e196c1ec23d5ecb72a97efc69a502a3886aa648801ba9247e90a0fd0a08ae1c3985d5e05515e88792aba4
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SSDEEP
3145728:t8aKWcoPkyA4sWnh3N9NX61z5UBrL4CnYCdTwA39QB:t8lWcoPO4sWhpX6UBf/vcY9QB
Score8/10-
Drops file in Drivers directory
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Modifies AppInit DLL entries
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Adds Run key to start application
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Downloads MZ/PE file
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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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Sets file execution options in registry
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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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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Drops file in System32 directory
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Suspicious use of NtSetInformationThreadHideFromDebugger
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
4Registry Run Keys / Startup Folder
4