Analysis
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max time kernel
135s -
max time network
133s -
platform
windows10_x64 -
resource
win10v200430 -
submitted
09-07-2020 15:10
Static task
static1
Behavioral task
behavioral1
Sample
W2_tax.xls
Resource
win7
Behavioral task
behavioral2
Sample
W2_tax.xls
Resource
win10v200430
General
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Target
W2_tax.xls
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Size
78KB
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MD5
1fd2f585ce9317cb4ef6e4c233ada13d
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SHA1
3357e3ea80149ca4e70d3d2ff1a362c8c7bd2c9d
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SHA256
a29c5c74a10ecc2aa343ec8da39c2549ceaad1f6d1cd7a2b1ddaf8f15d913c2c
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SHA512
0e90c2855aa6b815c5caf1c6f83c2bf1dd7d590a92744f90627383c6376a59ea38b5dd1d093c74e40a9a93d662c437de10201c9b85e671ba3a6145df2482184c
Malware Config
Signatures
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Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 2804 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
EXCEL.EXEdwwin.exepid process 2804 EXCEL.EXE 2804 EXCEL.EXE 4028 dwwin.exe 4028 dwwin.exe -
Process spawned suspicious child process 1 IoCs
This child process is typically not spawned unless (for example) the parent process crashes. This typically indicates the parent process was unsuccessfully compromised.
Processes:
DW20.EXEdescription pid pid_target process target process Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 984 2804 DW20.EXE EXCEL.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
EXCEL.EXEDW20.EXEdescription pid process target process PID 2804 wrote to memory of 984 2804 EXCEL.EXE DW20.EXE PID 2804 wrote to memory of 984 2804 EXCEL.EXE DW20.EXE PID 984 wrote to memory of 4028 984 DW20.EXE dwwin.exe PID 984 wrote to memory of 4028 984 DW20.EXE dwwin.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 opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE 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 -
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 use of SetWindowsHookEx 8 IoCs
Processes:
EXCEL.EXEpid process 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.EXE 2804 EXCEL.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\W2_tax.xls"1⤵
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of SetWindowsHookEx
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C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE"C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\DW\DW20.EXE" -x -s 45162⤵
- Process spawned suspicious child process
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\dwwin.exeC:\Windows\system32\dwwin.exe -x -s 45163⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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memory/984-0-0x0000000000000000-mapping.dmp
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memory/4028-1-0x0000000000000000-mapping.dmp
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memory/4028-2-0x000002C9FCEA0000-0x000002C9FCEA1000-memory.dmpFilesize
4KB
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memory/4028-3-0x000002C980820000-0x000002C980821000-memory.dmpFilesize
4KB
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memory/4028-4-0x000002C980820000-0x000002C980821000-memory.dmpFilesize
4KB
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memory/4028-6-0x000002C980820000-0x000002C980821000-memory.dmpFilesize
4KB
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memory/4028-7-0x000002C980C20000-0x000002C980C21000-memory.dmpFilesize
4KB
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memory/4028-9-0x000002C980B60000-0x000002C980B61000-memory.dmpFilesize
4KB
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memory/4028-10-0x000002C980B60000-0x000002C980B61000-memory.dmpFilesize
4KB
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memory/4028-11-0x000002C980B60000-0x000002C980B61000-memory.dmpFilesize
4KB