Analysis
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max time kernel
24s -
max time network
20s -
platform
windows7_x64 -
resource
win7-20240705-en -
resource tags
arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system -
submitted
03-08-2024 22:41
Static task
static1
Behavioral task
behavioral1
Sample
MrsMajor 3.0.7z
Resource
win7-20240705-en
Behavioral task
behavioral2
Sample
MrsMajor 3.0.7z
Resource
win10v2004-20240802-en
General
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Target
MrsMajor 3.0.7z
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Size
234KB
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MD5
fedb45ddbd72fc70a81c789763038d81
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SHA1
f1ed20c626d0a7ca2808ed768e7d7b319bc4c84a
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SHA256
eacd5ed86a8ddd368a1089c7b97b791258e3eeb89c76c6da829b58d469f654b2
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SHA512
813c0367f3aeceea9be02ffad4bfa8092ea44b428e68db8f3f33e45e4e5e53599d985fa79a708679b6957cbd04d9b9d67b288137fa71ac5a59e917b8792c8298
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SSDEEP
6144:HMMAgnxjSgdHCueEVIzAMAcqXvYEC86TFSQ:HagxjSg1xrIzAMAcuI5TFT
Malware Config
Signatures
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
AcroRd32.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language AcroRd32.exe -
Modifies registry class 2 IoCs
Processes:
rundll32.exerundll32.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_Classes\Local Settings rundll32.exe Key created \REGISTRY\USER\S-1-5-21-3502430532-24693940-2469786940-1000_Classes\Local Settings rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
AcroRd32.exepid process 2672 AcroRd32.exe 2672 AcroRd32.exe -
Suspicious use of WriteProcessMemory 10 IoCs
Processes:
cmd.exerundll32.exerundll32.exedescription pid process target process PID 2452 wrote to memory of 584 2452 cmd.exe rundll32.exe PID 2452 wrote to memory of 584 2452 cmd.exe rundll32.exe PID 2452 wrote to memory of 584 2452 cmd.exe rundll32.exe PID 584 wrote to memory of 2872 584 rundll32.exe rundll32.exe PID 584 wrote to memory of 2872 584 rundll32.exe rundll32.exe PID 584 wrote to memory of 2872 584 rundll32.exe rundll32.exe PID 2872 wrote to memory of 2672 2872 rundll32.exe AcroRd32.exe PID 2872 wrote to memory of 2672 2872 rundll32.exe AcroRd32.exe PID 2872 wrote to memory of 2672 2872 rundll32.exe AcroRd32.exe PID 2872 wrote to memory of 2672 2872 rundll32.exe AcroRd32.exe
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z3⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\AppData\Local\Temp\MrsMajor 3.0.7z"4⤵
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx