d5395f121277d2b38f4173c7df0a20a3de99edfcfe2aa697080cc81170eb76ab

Resubmissions

09/03/2025, 01:58

250309-cdv29swybs 10

08/03/2025, 06:55

250308-hp35xatjt9 10

08/03/2025, 04:53

250308-fh1ebssky5 10

Analysis

max time kernel
7s
platform
windows11-21h2_x64
resource
win11-20250217-en
resource tags

arch:x64arch:x86image:win11-20250217-enlocale:en-usos:windows11-21h2-x64system
submitted
08/03/2025, 06:55

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Reason

Machine shutdown

Report Analysis Logs

General

Target

My-Skidded-malwares-main/MarisaFumoDownload.exe
Size

825KB
MD5

e3558be7928053af8b9ccc60a57a40fc
SHA1

253f2b018c5aaa38cd038256af9b72bd397aece1
SHA256

125263fbc1a517f7302ee91bfaa548767719243b4f9dcaad33c13974fe9f4591
SHA512

3152ef4c7a544f282cf4ac356adf1d4ad753a0eb3ad12bf7af66174acae700e5a8d40302305b7acddc867e834829cf430efefe7a070fd17751e7571e5d5099be
SSDEEP

12288:WDbpr2trUqUeBhfUHzXC+cHJ8XeSb++6naTmvtCQomfU37uwzNiVEjZ5HX:WDdsrsG5UHulCXR+PaTmPc3q2I853

Score

6^/10

bootkit discovery persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2800786028-4028220528-1905518260-1000\Software\Microsoft\Windows\CurrentVersion\Run\CustomMBR = "C:\\Users\\Admin\\AppData\\Local\\Temp\\My-Skidded-malwares-main\\MarisaFumoDownload.exe -BypassWarning"	MarisaFumoDownload.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	MarisaFumoDownload.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MarisaFumoDownload.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4440	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2976	MarisaFumoDownload.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2976 wrote to memory of 4440	2976	MarisaFumoDownload.exe	82
PID 2976 wrote to memory of 4440	2976	MarisaFumoDownload.exe	82
PID 2976 wrote to memory of 4440	2976	MarisaFumoDownload.exe	82

C:\Users\Admin\AppData\Local\Temp\My-Skidded-malwares-main\MarisaFumoDownload.exe
"C:\Users\Admin\AppData\Local\Temp\My-Skidded-malwares-main\MarisaFumoDownload.exe"
1⤵
- Adds Run key to start application
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2976
- C:\Windows\SysWOW64\schtasks.exe
  schtasks.exe /Create /TN CustomMBR /ru SYSTEM /SC ONSTART /TR "C:\Users\Admin\AppData\Local\Temp\My-Skidded-malwares-main\MarisaFumoDownload.exe -BypassWarning"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4440