Analysis
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max time kernel
145s -
max time network
47s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
20-05-2022 14:28
Static task
static1
Behavioral task
behavioral1
Sample
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe
Resource
win10v2004-20220414-en
General
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Target
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe
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Size
1.7MB
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MD5
7dc329c08eb80f602e8fb5f1e577eb8f
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SHA1
76af05bec9bf9c33df9af39c765ab6decd99cd28
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SHA256
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b
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SHA512
1463059b333ec159a96b2afb43eee0e65df6a4e7b217ffdcc72bcd3d62e89a5d86de52a0a4f1f7c7ad7626b8d82c4ec225ad75d70a91d85925ec187aa58e525d
Malware Config
Signatures
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Looks for VirtualBox Guest Additions in registry 2 TTPs
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Executes dropped EXE 1 IoCs
Processes:
wbjExMzM1.exepid process 1980 wbjExMzM1.exe -
Looks for VMWare Tools registry key 2 TTPs
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Checks BIOS information in registry 2 TTPs 1 IoCs
BIOS information is often read in order to detect sandboxing environments.
Processes:
wbjExMzM1.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion wbjExMzM1.exe -
Loads dropped DLL 1 IoCs
Processes:
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exepid process 624 0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Enumerates connected drives 3 TTPs 24 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
wbjExMzM1.exedescription ioc process File opened (read-only) \??\F: wbjExMzM1.exe File opened (read-only) \??\I: wbjExMzM1.exe File opened (read-only) \??\Z: wbjExMzM1.exe File opened (read-only) \??\X: wbjExMzM1.exe File opened (read-only) \??\Y: wbjExMzM1.exe File opened (read-only) \??\G: wbjExMzM1.exe File opened (read-only) \??\M: wbjExMzM1.exe File opened (read-only) \??\O: wbjExMzM1.exe File opened (read-only) \??\U: wbjExMzM1.exe File opened (read-only) \??\V: wbjExMzM1.exe File opened (read-only) \??\W: wbjExMzM1.exe File opened (read-only) \??\B: wbjExMzM1.exe File opened (read-only) \??\E: wbjExMzM1.exe File opened (read-only) \??\H: wbjExMzM1.exe File opened (read-only) \??\R: wbjExMzM1.exe File opened (read-only) \??\S: wbjExMzM1.exe File opened (read-only) \??\T: wbjExMzM1.exe File opened (read-only) \??\Q: wbjExMzM1.exe File opened (read-only) \??\A: wbjExMzM1.exe File opened (read-only) \??\J: wbjExMzM1.exe File opened (read-only) \??\K: wbjExMzM1.exe File opened (read-only) \??\L: wbjExMzM1.exe File opened (read-only) \??\N: wbjExMzM1.exe File opened (read-only) \??\P: wbjExMzM1.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
wbjExMzM1.exedescription ioc process File opened for modification \??\PhysicalDrive0 wbjExMzM1.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
wbjExMzM1.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 wbjExMzM1.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString wbjExMzM1.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
wbjExMzM1.exedescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS\ wbjExMzM1.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BaseBoardManufacturer wbjExMzM1.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BaseBoardProduct wbjExMzM1.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
wbjExMzM1.exepid process 1980 wbjExMzM1.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
wbjExMzM1.exepid process 1980 wbjExMzM1.exe -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exedescription pid process target process PID 624 wrote to memory of 1980 624 0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe wbjExMzM1.exe PID 624 wrote to memory of 1980 624 0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe wbjExMzM1.exe PID 624 wrote to memory of 1980 624 0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe wbjExMzM1.exe PID 624 wrote to memory of 1980 624 0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe wbjExMzM1.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe"C:\Users\Admin\AppData\Local\Temp\0531bcd90fb2426b5eb306eec924285703ea1f2d80786df2d03ee67f8c6cce5b.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\MyDiskPro\wbjExMzM1.exe"C:\Users\Admin\AppData\Local\Temp\MyDiskPro\wbjExMzM1.exe" TEw9aHR0cDovL21maWxlLnNpdGUvZC8qTk49ZnJpZGF5LXRoZS0xM3RoLXRoZS1nYW1lLnRvcnJlbnQqRkY9MTQzMjIqQVBJPSpTSVpFPTE2NjQ5Kk1VPWh0dHA6Ly9tZGlzLmZ1bi9sLypTVT1NeURpc2sucHJvKg==2⤵
- Executes dropped EXE
- Checks BIOS information in registry
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\MyDiskPro\wbjExMzM1.exeFilesize
1.4MB
MD59a0541ea8737a6eb833b4d7f2a6ed633
SHA1d7cf0332a3a4ee116b070061f4cc76141734a422
SHA256a3176f27d1eb90ed92360db780cc33ef09040cf29b74fd974966948255ad83da
SHA512461d7b48b187e8a0be8465d1592d9d3c6bb0b08b146eefa188082bbdb511d88c07cc013df45eee9bee1e1fbfe1d1d953401fe398269367be7a5296c530eac01a
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\Users\Admin\AppData\Local\Temp\MyDiskPro\wbjExMzM1.exeFilesize
1.4MB
MD59a0541ea8737a6eb833b4d7f2a6ed633
SHA1d7cf0332a3a4ee116b070061f4cc76141734a422
SHA256a3176f27d1eb90ed92360db780cc33ef09040cf29b74fd974966948255ad83da
SHA512461d7b48b187e8a0be8465d1592d9d3c6bb0b08b146eefa188082bbdb511d88c07cc013df45eee9bee1e1fbfe1d1d953401fe398269367be7a5296c530eac01a
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memory/624-54-0x00000000769D1000-0x00000000769D3000-memory.dmpFilesize
8KB
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memory/624-58-0x0000000000400000-0x0000000000684000-memory.dmpFilesize
2.5MB
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memory/624-60-0x0000000000230000-0x0000000000233000-memory.dmpFilesize
12KB
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memory/1980-56-0x0000000000000000-mapping.dmp
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memory/1980-62-0x00000000001C0000-0x00000000001C3000-memory.dmpFilesize
12KB
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memory/1980-61-0x0000000000400000-0x000000000092C000-memory.dmpFilesize
5.2MB