13db59047310847b7b26436a401b1e1827b9600b5331ef04400659b3baf59243

Analysis

max time kernel
2s
max time network
5s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260618-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
28/06/2026, 16:00

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Reason

Machine shutdown

General

Target
MBR.exe
Size 3KB
Sample260628-tfmmcaat3q
SHA256 13db59047310847b7b26436a401b1e1827b9600b5331ef04400659b3baf59243
MD5 abfcdebd29f937a9327dbeca400c7f02
SHA1 b477253ea0fa8a3662a977cc22a52a7ce4de9efe
SHA512 fb9a183b7dc8129aa8f4acdc22ab55dc64df59e20b3781e801fd1ac03e12bb344c53ab26e1400c07a3cccb09caecddb76f5ab8faca3cd58cc2195afe6cba6682
TLSH
T18151FE8FC9EA9CE2C1D88BB20BCBC629F87B053487C3F5002EE10755C430AB56525785
MD5 SHA1 SHA512 TLSH

Score

6^/10

bootkit discovery persistence

Malware Config

Signatures

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	MBR.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	MBR.exe

Modifies data under HKEY_USERS 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	3364	MBR.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5916	LogonUI.exe

C:\Users\Admin\AppData\Local\Temp\MBR.exe
"C:\Users\Admin\AppData\Local\Temp\MBR.exe"
1⤵
- Writes to the Master Boot Record (MBR)
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3364

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a0c855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:5916

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k CameraMonitor
1⤵
PID:2628

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Defense Evasion

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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