6f2e3eccadffadc1b7d610246816b9906c6cb5d50d1876dcd588364241a46200

Analysis

max time kernel
10s
max time network
14s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
28/06/2026, 00:52

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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 credential_access 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\DisableRealtimeMonitoring = "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\DisableBehaviorMonitoring = "1"	reg.exe

Clears Windows event logs 1 TTPs 3 IoCs

defense_evasion ransomware

Clear Windows Event Logs

T1070.001

pid	Process
1340	wevtutil.exe
648	wevtutil.exe
2736	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
1956	powershell.exe

Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
credential_access stealer

Windows Credential Manager
T1555.004
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 3 IoCs

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

upx

resource	yara_rule
behavioral1/memory/3492-0-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp	upx
behavioral1/memory/3492-2-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp	upx
behavioral1/memory/1536-3104-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp	upx

Launches sc.exe 4 IoCs

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

pid	Process
4028	sc.exe
4376	sc.exe
1572	sc.exe
3500	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
3472	vssadmin.exe

Kills process with taskkill 7 IoCs

defense_evasion

pid	Process
4904	taskkill.exe
5108	taskkill.exe
4696	taskkill.exe
1592	taskkill.exe
1924	taskkill.exe
1100	taskkill.exe
3876	taskkill.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1956	powershell.exe
1956	powershell.exe

Suspicious use of AdjustPrivilegeToken 59 IoCs

description	pid	Process
Token: SeDebugPrivilege	1924	taskkill.exe
Token: SeDebugPrivilege	1956	powershell.exe
Token: SeDebugPrivilege	5108	taskkill.exe
Token: SeDebugPrivilege	4904	taskkill.exe
Token: SeDebugPrivilege	1592	taskkill.exe
Token: SeDebugPrivilege	1100	taskkill.exe
Token: SeDebugPrivilege	4696	taskkill.exe
Token: SeDebugPrivilege	3876	taskkill.exe
Token: SeIncreaseQuotaPrivilege	432	wmic.exe
Token: SeSecurityPrivilege	432	wmic.exe
Token: SeTakeOwnershipPrivilege	432	wmic.exe
Token: SeLoadDriverPrivilege	432	wmic.exe
Token: SeSystemProfilePrivilege	432	wmic.exe
Token: SeSystemtimePrivilege	432	wmic.exe
Token: SeProfSingleProcessPrivilege	432	wmic.exe
Token: SeIncBasePriorityPrivilege	432	wmic.exe
Token: SeCreatePagefilePrivilege	432	wmic.exe
Token: SeBackupPrivilege	432	wmic.exe
Token: SeRestorePrivilege	432	wmic.exe
Token: SeShutdownPrivilege	432	wmic.exe
Token: SeDebugPrivilege	432	wmic.exe
Token: SeSystemEnvironmentPrivilege	432	wmic.exe
Token: SeRemoteShutdownPrivilege	432	wmic.exe
Token: SeUndockPrivilege	432	wmic.exe
Token: SeManageVolumePrivilege	432	wmic.exe
Token: 33	432	wmic.exe
Token: 34	432	wmic.exe
Token: 35	432	wmic.exe
Token: 36	432	wmic.exe
Token: SeSecurityPrivilege	648	wevtutil.exe
Token: SeBackupPrivilege	648	wevtutil.exe
Token: SeSecurityPrivilege	2736	wevtutil.exe
Token: SeBackupPrivilege	2736	wevtutil.exe
Token: SeSecurityPrivilege	1340	wevtutil.exe
Token: SeBackupPrivilege	1340	wevtutil.exe
Token: SeBackupPrivilege	3084	vssvc.exe
Token: SeRestorePrivilege	3084	vssvc.exe
Token: SeAuditPrivilege	3084	vssvc.exe
Token: SeIncreaseQuotaPrivilege	432	wmic.exe
Token: SeSecurityPrivilege	432	wmic.exe
Token: SeTakeOwnershipPrivilege	432	wmic.exe
Token: SeLoadDriverPrivilege	432	wmic.exe
Token: SeSystemProfilePrivilege	432	wmic.exe
Token: SeSystemtimePrivilege	432	wmic.exe
Token: SeProfSingleProcessPrivilege	432	wmic.exe
Token: SeIncBasePriorityPrivilege	432	wmic.exe
Token: SeCreatePagefilePrivilege	432	wmic.exe
Token: SeBackupPrivilege	432	wmic.exe
Token: SeRestorePrivilege	432	wmic.exe
Token: SeShutdownPrivilege	432	wmic.exe
Token: SeDebugPrivilege	432	wmic.exe
Token: SeSystemEnvironmentPrivilege	432	wmic.exe
Token: SeRemoteShutdownPrivilege	432	wmic.exe
Token: SeUndockPrivilege	432	wmic.exe
Token: SeManageVolumePrivilege	432	wmic.exe
Token: 33	432	wmic.exe
Token: 34	432	wmic.exe
Token: 35	432	wmic.exe
Token: 36	432	wmic.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 3492 wrote to memory of 1924	3492	bazzarnuker.exe	84
PID 3492 wrote to memory of 1956	3492	bazzarnuker.exe	85
PID 1956 wrote to memory of 1536	1956	powershell.exe	89
PID 1536 wrote to memory of 1100	1536	bazzarnuker.exe	91
PID 1536 wrote to memory of 1592	1536	bazzarnuker.exe	92
PID 1536 wrote to memory of 4696	1536	bazzarnuker.exe	93
PID 1536 wrote to memory of 5108	1536	bazzarnuker.exe	94
PID 1536 wrote to memory of 4904	1536	bazzarnuker.exe	95
PID 1536 wrote to memory of 3876	1536	bazzarnuker.exe	96
PID 1536 wrote to memory of 3544	1536	bazzarnuker.exe	98
PID 1536 wrote to memory of 2852	1536	bazzarnuker.exe	99
PID 1536 wrote to memory of 1724	1536	bazzarnuker.exe	100
PID 1536 wrote to memory of 3500	1536	bazzarnuker.exe	102
PID 1536 wrote to memory of 1572	1536	bazzarnuker.exe	103
PID 1536 wrote to memory of 4376	1536	bazzarnuker.exe	105
PID 1536 wrote to memory of 4028	1536	bazzarnuker.exe	106
PID 1536 wrote to memory of 3472	1536	bazzarnuker.exe	117
PID 1536 wrote to memory of 432	1536	bazzarnuker.exe	118
PID 1536 wrote to memory of 2736	1536	bazzarnuker.exe	120
PID 1536 wrote to memory of 648	1536	bazzarnuker.exe	122
PID 1536 wrote to memory of 1340	1536	bazzarnuker.exe	123

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:3492
- C:\Windows\system32\taskkill.exe
  "taskkill" /f /im javaw.exe
  2⤵
  - Kills process with taskkill
  - Suspicious use of AdjustPrivilegeToken
  PID:1924
- 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:1956
- - 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:1536
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im javaw.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1100
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im MsMpEng.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:1592
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im NisSrv.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4696
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im cb.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:5108
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im csfalconservice.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:4904
  - - C:\Windows\system32\taskkill.exe
      "taskkill" /f /im csagent.exe
      4⤵
      Kills process with taskkill
      Suspicious use of AdjustPrivilegeToken
      PID:3876
  - - 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:3544
  - - 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:2852
  - - 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:1724
  - - C:\Windows\system32\sc.exe
      "sc" stop WinDefend
      4⤵
      Launches sc.exe
      PID:3500
  - - C:\Windows\system32\sc.exe
      "sc" config WinDefend start= disabled
      4⤵
      Launches sc.exe
      PID:1572
  - - C:\Windows\system32\sc.exe
      "sc" stop Sense
      4⤵
      Launches sc.exe
      PID:4376
  - - C:\Windows\system32\sc.exe
      "sc" config Sense start= disabled
      4⤵
      Launches sc.exe
      PID:4028
  - - C:\Windows\system32\vssadmin.exe
      "vssadmin" delete shadows /all /quiet
      4⤵
      Interacts with shadow copies
      PID:3472
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic" shadowcopy delete
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:432
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl Application
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:2736
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl System
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:648
  - - C:\Windows\system32\wevtutil.exe
      "wevtutil" cl Security
      4⤵
      Clears Windows event logs
      Suspicious use of AdjustPrivilegeToken
      PID:1340
  - - C:\Windows\system32\shutdown.exe
      "shutdown" /r /t 0 /f
      4⤵
      PID:4512

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3084

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa396f055 /state1:0x41c64e6d
1⤵
PID:4856

C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" "C:\Windows\SYSTEM32\EDGEHTML.dll",#141 Microsoft.Windows.Search_cw5n1h2txyewy
1⤵
PID:5444

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k UnistackSvcGroup
1⤵
PID:5468

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

System Services

T1569

Service Execution

T1569.002

Windows Management Instrumentation

T1047

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Direct Volume Access

T1006

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

Clear Windows Event Logs

T1070.001

File Deletion

T1070.004

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Windows Credential Manager

T1555.004

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Browser Information Discovery

T1217

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Service Stop

T1489

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 46b4e20eaac9c9fedc60af05db073b8d0903fc03d5438ad82aa1d521dcdbea59
MD5 fa6b57da4ef6a96e5df9afcbd452e5e0
SHA1 d56d203c5847fa787c39e020de72817347d40915
SHA512 c3fb237e362fc26a7f38e99cce04095e0bcbc8e088a411b93f9fe5b7ec52133355177dbf9179c4e01e66a5addf8c2b07956079e2f83d9d486bd745a97175c386
TLSH
T1E2510F323375F1E4C8567F071E68198053BF4395EA94AF5CB298621ED92741B8F222F3
MD5 SHA1 SHA512 TLSH

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__PSScriptPolicyTest_dalvzbfw.vh0.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dalvzbfw.vh0.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/1536-3104-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp

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memory/1956-3-0x000001FBD22A0000-0x000001FBD22B0000-memory.dmp

Download

memory/1956-11-0x000001FBB9FB0000-0x000001FBB9FD2000-memory.dmp

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memory/3492-0-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp

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memory/3492-2-0x00007FF76D570000-0x00007FF76D5ED000-memory.dmp

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Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads