Analysis
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max time kernel
147s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-20220414-en -
submitted
22-05-2022 05:19
Behavioral task
behavioral1
Sample
buhopbnh.xlsm
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
buhopbnh.xlsm
Resource
win10v2004-20220414-en
General
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Target
buhopbnh.xlsm
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Size
46KB
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MD5
bfd57e03ead523e7a4e602dc6e367b57
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SHA1
9f76ebbdeff2e570e6b1e7915ec4b8ecfc4a3c07
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SHA256
ab43f95f76dbd0bafc11d3af407297993a715790014ec2d550185c7eb75293ab
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SHA512
6891128baaddfd435d1fe5609181aba9633d5d5faa4cabf26cbf197a19ec98631bda7debf1c7b0e62863be6c5af7a876bf03b77393ac70f83f4a0e84e8208cb5
Malware Config
Extracted
http://eles-tech.com/css/KzMysMqFMs/
http://gonorthhalifax.com/wp-content/yTmYyLbTKZV2czsUO/
Signatures
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Process spawned unexpected child process 1 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
Processes:
regsvr32.exedescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2136 4900 regsvr32.exe EXCEL.EXE -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
Processes:
EXCEL.EXEdescription ioc process Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 4900 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE 4900 EXCEL.EXE -
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
EXCEL.EXEdescription pid process target process PID 4900 wrote to memory of 2136 4900 EXCEL.EXE regsvr32.exe PID 4900 wrote to memory of 2136 4900 EXCEL.EXE regsvr32.exe PID 4900 wrote to memory of 2136 4900 EXCEL.EXE regsvr32.exe
Processes
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C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\buhopbnh.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWow64\regsvr32.exeC:\Windows\SysWow64\regsvr32.exe -s ..\xewn.dll2⤵
- Process spawned unexpected child process
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\xewn.dllFilesize
679KB
MD50743b2373b4ff3aa7f4351da07bf9ddb
SHA130f2ac6ae21062bfaed0b8a6f4d47ff2aebc6344
SHA2564dd64997e4a5ebee46fd154015ebc0647642618a869ab3092b87959798e341a2
SHA512e1bb60db7691d4c8c3800d68e09d49502943609dd7b94e2738500df6381e754987112c128baf43106fad20e5b35445fa2856eeabd50e8b88f9291fbc0487c9ae
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memory/2136-137-0x0000000000000000-mapping.dmp
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memory/4900-130-0x00007FFBA0F70000-0x00007FFBA0F80000-memory.dmpFilesize
64KB
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memory/4900-131-0x00007FFBA0F70000-0x00007FFBA0F80000-memory.dmpFilesize
64KB
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memory/4900-132-0x00007FFBA0F70000-0x00007FFBA0F80000-memory.dmpFilesize
64KB
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memory/4900-133-0x00007FFBA0F70000-0x00007FFBA0F80000-memory.dmpFilesize
64KB
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memory/4900-134-0x00007FFBA0F70000-0x00007FFBA0F80000-memory.dmpFilesize
64KB
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memory/4900-135-0x00007FFB9EB60000-0x00007FFB9EB70000-memory.dmpFilesize
64KB
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memory/4900-136-0x00007FFB9EB60000-0x00007FFB9EB70000-memory.dmpFilesize
64KB