Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
11-11-2024 17:23
Behavioral task
behavioral1
Sample
b8f3c0e74fcf05c3cb59c8efceeb42938b126a904ab74773100e8e78843ad168.xls
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
b8f3c0e74fcf05c3cb59c8efceeb42938b126a904ab74773100e8e78843ad168.xls
Resource
win10v2004-20241007-en
General
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Target
b8f3c0e74fcf05c3cb59c8efceeb42938b126a904ab74773100e8e78843ad168.xls
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Size
70KB
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MD5
e79c4898dcefac690d11a4d2bfe13afe
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SHA1
fdc27e42a66650fdef6d94906b6612d31a60a636
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SHA256
b8f3c0e74fcf05c3cb59c8efceeb42938b126a904ab74773100e8e78843ad168
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SHA512
436ccc04ea7f10fd370bd3e48131b90134646dc98e1e5a999aba0bd6e77ef9ea9af362d165114a0fde7c46ad9666fc563d308420d627c0be9385d6c63ff64fe5
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SSDEEP
1536:OhKpb8rGYrMPe3q7Q0XV5xtezE8vG8UM+e+hDcnTLiQrRTZws8Eg0:uKpb8rGYrMPe3q7Q0XV5xtezE8vG8UMh
Malware Config
Extracted
https://strachanclark.com/images/3gc4qCpSFYbBMDEC/
https://synapse-archive.com/images/bKaMr/
https://sumuvesa.com/wp-includes/rgL/
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 2320 1232 regsvr32.exe 82 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 4032 1232 regsvr32.exe 82 Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process 1184 1232 regsvr32.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 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 1232 EXCEL.EXE -
Suspicious use of FindShellTrayWindow 2 IoCs
pid Process 1232 EXCEL.EXE 1232 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 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 -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1232 wrote to memory of 2320 1232 EXCEL.EXE 89 PID 1232 wrote to memory of 2320 1232 EXCEL.EXE 89 PID 1232 wrote to memory of 4032 1232 EXCEL.EXE 92 PID 1232 wrote to memory of 4032 1232 EXCEL.EXE 92 PID 1232 wrote to memory of 1184 1232 EXCEL.EXE 95 PID 1232 wrote to memory of 1184 1232 EXCEL.EXE 95
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\b8f3c0e74fcf05c3cb59c8efceeb42938b126a904ab74773100e8e78843ad168.xls"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1232 -
C:\Windows\System32\regsvr32.exeC:\Windows\System32\regsvr32.exe /S ..\cusoa1.ocx2⤵
- Process spawned unexpected child process
PID:2320
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C:\Windows\System32\regsvr32.exeC:\Windows\System32\regsvr32.exe /S ..\cusoa2.ocx2⤵
- Process spawned unexpected child process
PID:4032
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C:\Windows\System32\regsvr32.exeC:\Windows\System32\regsvr32.exe /S ..\cusoa3.ocx2⤵
- Process spawned unexpected child process
PID:1184
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
Filesize1KB
MD5645c0b4b4a4c43a591958af8c847f260
SHA11e1a342cac51109302c8084dccd38c5f34bd7494
SHA2560c36100009a2fb8635b6872f3cb90d45fc84fb00ed71f8f7ba9fcb39532bdabb
SHA512d512bf589b470317b28cd9c81802f71beb509846dd895b67e6b746eb9a916f226db51511ba24267894042cb1a6a74df95c23635152c8e1b18e5176e7c2fb3073