Analysis
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max time kernel
151s -
max time network
132s -
platform
windows10_x64 -
resource
win10-en-20211208 -
submitted
12-01-2022 20:51
Behavioral task
behavioral1
Sample
8f99cab09eb9674d602d903701978b39bbe6bf9eb123a358837b44e4076a5e86.xlsm
Resource
win10-en-20211208
Behavioral task
behavioral2
Sample
8f99cab09eb9674d602d903701978b39bbe6bf9eb123a358837b44e4076a5e86.xlsm
Resource
win10-en-20211208
General
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Target
8f99cab09eb9674d602d903701978b39bbe6bf9eb123a358837b44e4076a5e86.xlsm
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Size
84KB
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MD5
92fcad2ae760b160b5a7d239afa4cc49
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SHA1
ff853bd7c88b967f39ac30c5146070562aecdc2c
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SHA256
8f99cab09eb9674d602d903701978b39bbe6bf9eb123a358837b44e4076a5e86
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SHA512
da562099ce4ab8e0956312730c997ce84254b21c77ed19c0112783f3ab6f55ab1ee2a7fb3345e36bded663c6ef080b0cf281f13ed954c818136832ff03ad26ae
Malware Config
Extracted
http://insertcatherreview.xyz/wp-includes/o23k5ted/
Signatures
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Process spawned unexpected child process 1 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 1812 2608 rundll32.exe 67 -
Loads dropped DLL 2 IoCs
pid Process 1812 rundll32.exe 1152 rundll32.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\Cxbyeqlard\aesy.uhv rundll32.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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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 -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2608 EXCEL.EXE -
Suspicious use of SetWindowsHookEx 12 IoCs
pid Process 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE 2608 EXCEL.EXE -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 2608 wrote to memory of 1812 2608 EXCEL.EXE 71 PID 2608 wrote to memory of 1812 2608 EXCEL.EXE 71 PID 2608 wrote to memory of 1812 2608 EXCEL.EXE 71 PID 1812 wrote to memory of 1152 1812 rundll32.exe 72 PID 1812 wrote to memory of 1152 1812 rundll32.exe 72 PID 1812 wrote to memory of 1152 1812 rundll32.exe 72 PID 1152 wrote to memory of 944 1152 rundll32.exe 75 PID 1152 wrote to memory of 944 1152 rundll32.exe 75 PID 1152 wrote to memory of 944 1152 rundll32.exe 75
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\8f99cab09eb9674d602d903701978b39bbe6bf9eb123a358837b44e4076a5e86.xlsm"1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2608 -
C:\Windows\SysWow64\rundll32.exeC:\Windows\SysWow64\rundll32.exe ..\adi.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r2⤵
- Process spawned unexpected child process
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1812 -
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\adi.ocx",DllRegisterServer3⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1152 -
C:\Windows\SysWOW64\rundll32.exeC:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Cxbyeqlard\aesy.uhv",ICZyAJtaoiL4⤵PID:944
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