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Analysis
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max time kernel
100s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
28/12/2023, 06:35
Behavioral task
behavioral1
Sample
cc31c5d769e28c33b79dfb1c2b6cbea6.xls
Resource
win7-20231215-en
9 signatures
150 seconds
General
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Target
cc31c5d769e28c33b79dfb1c2b6cbea6.xls
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Size
317KB
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MD5
cc31c5d769e28c33b79dfb1c2b6cbea6
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SHA1
c796c4c1878053f2e5ec3b70bdd84b304d1c4c30
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SHA256
48c8327b8fa0bd5e233a28148952aacad1180803bd004d344321eadc6c710479
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SHA512
dfd4d3ac4510b67bef8fcc4730c7d625b3860139859e82a5bf417a12ea2b438f88e7b46cc470378eda0fb75d37892e944ae925bfc9a3d030f4cd93003576f45e
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SSDEEP
6144:wz+dIDeVH2K6CLNBYxDjYl76c2bOAGriOQR6pxHkOn:sDVVzGrKR6
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 3848 2544 cmd.exe 16 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2472 2544 cmd.exe 16 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 2332 2544 cmd.exe 16 -
resource yara_rule behavioral2/files/0x0005000000022e6e-117.dat office_xlm_macros -
Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
description 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
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 -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2544 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 2544 EXCEL.EXE 2544 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 13 IoCs
pid Process 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE 2544 EXCEL.EXE -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 2020 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\cc31c5d769e28c33b79dfb1c2b6cbea6.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
PID:2544 -
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:3848
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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:2472
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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
PID:2332
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C:\Windows\system32\attrib.exeattrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"1⤵
- Views/modifies file attributes
PID:2020