Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
27-02-2024 09:44
Behavioral task
behavioral1
Sample
a8d70882b3b3ff024c06336db0309bc4.xls
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
a8d70882b3b3ff024c06336db0309bc4.xls
Resource
win10v2004-20240226-en
General
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Target
a8d70882b3b3ff024c06336db0309bc4.xls
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Size
135KB
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MD5
a8d70882b3b3ff024c06336db0309bc4
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SHA1
cc15626fe6613e0550a97f9cb574a65a5180816a
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SHA256
3f2c0b00d9380b4d4de3ac6ce7398aa7d807783652442d84be7c5fe6200ad063
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SHA512
279492184ff711a43e47b6b267e8ea9b59c82cae9f72a38c5d18bc6d4d4f005388b7041de74bdd699a4bb4958e2fdffa0cd21ec2353234f9041799354a800650
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SSDEEP
1536:Gt44n0o4g0hmVnLziCdymRxoiKTM4O+Ky2fsqITzrWCBE+Mvi2ytWVbrzQ7ITkaJ:4aziCQ8WVbrzQ7ITkZYrjhJtXwy1H
Malware Config
Signatures
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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 4588 3252 DW20.EXE EXCEL.EXE -
Checks processor information in registry 2 TTPs 6 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
EXCEL.EXEdwwin.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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 dwwin.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz dwwin.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString dwwin.exe -
Enumerates system info in registry 2 TTPs 5 IoCs
Processes:
EXCEL.EXEdwwin.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 Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS dwwin.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU dwwin.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
Processes:
EXCEL.EXEpid process 3252 EXCEL.EXE -
Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
EXCEL.EXEpid process 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
Processes:
EXCEL.EXEpid process 3252 EXCEL.EXE 3252 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
Processes:
EXCEL.EXEpid process 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE 3252 EXCEL.EXE -
Suspicious use of WriteProcessMemory 4 IoCs
Processes:
EXCEL.EXEDW20.EXEdescription pid process target process PID 3252 wrote to memory of 4588 3252 EXCEL.EXE DW20.EXE PID 3252 wrote to memory of 4588 3252 EXCEL.EXE DW20.EXE PID 4588 wrote to memory of 4256 4588 DW20.EXE dwwin.exe PID 4588 wrote to memory of 4256 4588 DW20.EXE dwwin.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\a8d70882b3b3ff024c06336db0309bc4.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3252 -
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 46642⤵
- Process spawned suspicious child process
- Suspicious use of WriteProcessMemory
PID:4588 -
C:\Windows\system32\dwwin.exeC:\Windows\system32\dwwin.exe -x -s 46643⤵
- Checks processor information in registry
- Enumerates system info in registry
PID:4256
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C:\Windows\System32\Upfc.exeC:\Windows\System32\Upfc.exe /launchtype periodic /cv Q6eVbV+mn0yF5CNER5Sw2g.01⤵PID:1468