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Analysis
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max time kernel
110s -
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
14/02/2023, 19:29
Behavioral task
behavioral1
Sample
26c90443762f147189330196a7f37a55.xlsb
Resource
win7-20221111-en
General
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Target
26c90443762f147189330196a7f37a55.xlsb
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Size
83KB
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MD5
26c90443762f147189330196a7f37a55
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SHA1
f7f0e47df27cd6c99096ab9f4baeb1041dfe0c41
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SHA256
28e0ffe67dd62f679523af17fd8031d2d92a46577effe12f7027c5c5595f8fc5
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SHA512
8ae802e9fb065bf8740f33efd1794b28bb98ba3a9b0d78708fa54a4526f90bfe6f4c9f19d17983807bf74c6df0d5c9a6f6a2a9a6b92db692f741291b129944f2
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SSDEEP
1536:kU/wRbzYC/DoH//O4Ai4nk4i5gqbxFRWs1yeq3++K8EmA9Z:kUybzY7nHJ4klFTWKy9++K8E
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 532 4716 cmd.exe 78 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 1544 4716 cmd.exe 78 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 4960 4716 cmd.exe 78 -
resource yara_rule behavioral2/files/0x0007000000022e22-143.dat office_xlm_macros behavioral2/files/0x0007000000022e22-143.dat -
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 -
NTFS ADS 1 IoCs
description ioc Process File created C:\Users\Admin\AppData\Local\Temp\A8865E00\:Zone.Identifier:$DATA EXCEL.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4716 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 4716 EXCEL.EXE 4716 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 14 IoCs
pid Process 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE 4716 EXCEL.EXE -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 4716 wrote to memory of 532 4716 EXCEL.EXE 82 PID 4716 wrote to memory of 532 4716 EXCEL.EXE 82 PID 4716 wrote to memory of 4960 4716 EXCEL.EXE 86 PID 4716 wrote to memory of 4960 4716 EXCEL.EXE 86 PID 4716 wrote to memory of 1544 4716 EXCEL.EXE 85 PID 4716 wrote to memory of 1544 4716 EXCEL.EXE 85 PID 532 wrote to memory of 4664 532 cmd.exe 88 PID 532 wrote to memory of 4664 532 cmd.exe 88 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 4664 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\26c90443762f147189330196a7f37a55.xlsb"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:4716 -
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:532 -
C:\Windows\system32\attrib.exeattrib -S -h "C:\Users\Admin\AppData\Roaming\Microsoft\Excel\XLSTART\K4.XLS"3⤵
- Views/modifies file attributes
PID:4664
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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:1544
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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:4960
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
85KB
MD57e035d6dbd6fa293389f3928428a0441
SHA1a724daf65bec09ca1b2c78b460c8777708a2ca2b
SHA256de8727bc093b3e99af7e5062b717ef26fc26cb2504e729d37eed8e5a468421c4
SHA5125ee5b69b32232fb83a59ca018c1e271a93ff7634e9390294f46dd7514d707c7ec3edab68f1f8fff7005f1690169b38836f1a7b629cab9bf7f2fc38de0350580c