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Analysis
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max time kernel
136s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
31/01/2023, 17:36
Behavioral task
behavioral1
Sample
c59cfc540618526b2233ea40f02ba57f.xls
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
c59cfc540618526b2233ea40f02ba57f.xls
Resource
win10v2004-20220812-en
General
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Target
c59cfc540618526b2233ea40f02ba57f.xls
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Size
389KB
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MD5
c59cfc540618526b2233ea40f02ba57f
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SHA1
399a21faf44443397d514abb7f44e2c44286e2a2
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SHA256
10714e5e2e38c5d10939b029a59f8960e41d4ed9acffdffdcb1759894ca3ca19
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SHA512
503301b3dd0a8aa56a22755a2e626e6ccb2ba780e7c3891f91fff1bf8cfac18461ab1e29175dd9fb924aa444a1725d3f30843479156e5529edaea433eaf1cb39
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SSDEEP
6144:7XGSLCvXuzqAsQ4/OEl7B5hiEPpXlou8xi/1TBFWVh3c:RvmEns
Malware Config
Signatures
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Process spawned unexpected child process 3 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
description pid pid_target Process procid_target Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2556 1232 cmd.exe 82 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2064 1232 cmd.exe 82 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 1888 1232 cmd.exe 82 -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString EXCEL.EXE Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 EXCEL.EXE Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz EXCEL.EXE -
Enumerates system info in registry 2 TTPs 3 IoCs
description 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 -
NTFS ADS 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Local\Temp\78865E00\:Zone.Identifier:$DATA EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 1232 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 1232 EXCEL.EXE 1232 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 14 IoCs
pid Process 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE 1232 EXCEL.EXE -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1232 wrote to memory of 2556 1232 EXCEL.EXE 85 PID 1232 wrote to memory of 2556 1232 EXCEL.EXE 85 PID 1232 wrote to memory of 2064 1232 EXCEL.EXE 87 PID 1232 wrote to memory of 2064 1232 EXCEL.EXE 87 PID 1232 wrote to memory of 1888 1232 EXCEL.EXE 89 PID 1232 wrote to memory of 1888 1232 EXCEL.EXE 89 PID 2556 wrote to memory of 1280 2556 cmd.exe 92 PID 2556 wrote to memory of 1280 2556 cmd.exe 92 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 1280 attrib.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\c59cfc540618526b2233ea40f02ba57f.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- NTFS ADS
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c attrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"2⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:2556 -
C:\Windows\system32\attrib.exeattrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"3⤵
- Views/modifies file attributes
PID:1280
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c Del /F /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"2⤵
- Process spawned unexpected child process
PID:2064
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c RD /S /Q "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"2⤵
- Process spawned unexpected child process
PID:1888
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