blackbasta | 4b83aaecddfcb8cf5caeff3cb30fee955ecfc3eea97d19dccf86f24c77c41fc4

Analysis

max time kernel
18s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20250129-en
resource tags

arch:x64arch:x86image:win10v2004-20250129-enlocale:en-usos:windows10-2004-x64system
submitted
05-02-2025 16:58

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General

Target

file.exe
Size

681KB
MD5

a41afe748aed818ab6ac94e81bdde610
SHA1

9468012acf6df7a0e593f41e0da8123f541277df
SHA256

4b83aaecddfcb8cf5caeff3cb30fee955ecfc3eea97d19dccf86f24c77c41fc4
SHA512

43394cb5e461fb43d324e5b5c212d3c9832fd659e81cd6e250beff7b738d00eaedc2ab0d37f8f3a2cf513997dfc838c31380c64d5e911c65329caf65fb570975
SSDEEP

12288:FMJYSP5VV3VG7rYyPT+p/VYXMJ8oD536bGIqs7GBvw0QygfmHp:FMVj3IXYETQV1XD5VIZ7GOg1J

Score

10^/10

blackbasta defense_evasion discovery execution impact ransomware

Malware Config

Extracted

Path

C:\Program Files (x86)\instructions_read_me.txt

Family

blackbasta

Ransom Note

ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion/ Login ID: ae31fac0-5ef2-4d58-8434-0c644b47d85c *!* To access .onion websites download and install Tor Browser at: https://www.torproject.org/ (Tor Browser is not related to us) *!* To restore all your PCs and get your network working again, follow these instructions: - Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. It doesn't matter, who are trying to do this, either it will be your IT guys or a recovery agency. Please follow these simple rules to avoid data corruption: - Do not modify, rename or delete files. Any attempts to modify, decrypt or rename the files will lead to its fatal corruption. - Do not hire a recovery company. They can't decrypt without the key. They also don't care about your business. They believe that they are good negotiators, but it is not. They usually fail. So speak for yourself. Waiting you in a chat.

URLs

https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion/

Signatures

Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
ransomware blackbasta
Blackbasta family
blackbasta
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
Renames multiple (747) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_2019.125.2243.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml	file.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\ja-JP\MpAsDesc.dll.mui	file.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\mshwLatin.dll	file.exe
File opened for modification	C:\Program Files\Windows Media Player\wmpshare.exe	file.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\CommunityInterop.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.People_10.1902.633.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxManifest.xml	file.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\nio.dll	file.exe
File opened for modification	C:\Program Files\7-Zip\7-zip.dll	file.exe
File opened for modification	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00E2-0000-1000-0000000FF1CE.xml	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\System.ComponentModel.Annotations.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\winsdkfb.winmd	file.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-handle-l1-1-0.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Wallet_2.4.18324.0_neutral_~_8wekyb3d8bbwe\AppxBlockMap.xml	file.exe
File opened for modification	C:\Program Files\Windows Media Player\ja-JP\wmplayer.exe.mui	file.exe
File created	C:\Program Files\Windows Photo Viewer\fr-FR\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_1.1911.21713.0_x64__8wekyb3d8bbwe\Microsoft.IoT.Cortana.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\RuntimeConfiguration.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\System.ObjectModel.dll	file.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\jjs.exe	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MixedReality.Portal_2000.19081.1301.0_neutral_split.scale-125_8wekyb3d8bbwe\AppxBlockMap.xml	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.NET.Native.Runtime.1.7_1.7.25531.0_x64__8wekyb3d8bbwe\logo.png	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.VCLibs.140.00.UWPDesktop_14.0.27629.0_x64__8wekyb3d8bbwe\mfc140u.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\AppxSignature.p7x	file.exe
File created	C:\Program Files (x86)\Google\Temp\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\System.Xml.XmlSerializer.dll	file.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\hwrenUSlm.dat	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_1.1911.21713.0_x64__8wekyb3d8bbwe\Microsoft.Applications.Telemetry.Windows-native.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\TelemetryUWP.dll	file.exe
File created	C:\Program Files (x86)\Windows Media Player\Skins\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Common Files\System\ado\msadrh15.dll	file.exe
File created	C:\Program Files\Crashpad\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Internet Explorer\it-IT\ieinstal.exe.mui	file.exe
File opened for modification	C:\Program Files\Windows Media Player\uk-UA\wmpnetwk.exe.mui	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_neutral_split.scale-100_kzf8qxf38zg5c\resources.pri	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MSPaint_6.1907.29027.0_x64__8wekyb3d8bbwe\AppxSignature.p7x	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.SkypeApp_14.53.77.0_x64__kzf8qxf38zg5c\SkypeBackgroundHost.exe	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsCamera_2018.826.98.0_x64__8wekyb3d8bbwe\WindowsCamera.exe	file.exe
File opened for modification	C:\Program Files\Windows Photo Viewer\PhotoAcq.dll	file.exe
File created	C:\Program Files\Windows Defender\es-ES\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Windows Photo Viewer\en-US\PhotoAcq.dll.mui	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Microsoft3DViewer_6.1908.2042.0_x64__8wekyb3d8bbwe\Microsoft.BigPark.Utilities.winmd	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\System.Threading.Timer.dll	file.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\oledbvbs.inc	file.exe
File opened for modification	C:\Program Files\7-Zip\Lang\pl.txt	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.GetHelp_10.1706.13331.0_x64__8wekyb3d8bbwe\clrcompression.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Services.Store.Engagement_10.0.18101.0_x64__8wekyb3d8bbwe\AppxManifest.xml	file.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\tipresx.dll	file.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-errorhandling-l1-1-0.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.DesktopAppInstaller_1.0.30251.0_x64__8wekyb3d8bbwe\AppInstaller.winmd	file.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\Media Renderer\DMR_120.png	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.VCLibs.140.00.UWPDesktop_14.0.27629.0_x64__8wekyb3d8bbwe\mfc140chs.dll	file.exe
File created	C:\Program Files\WindowsApps\Microsoft.WindowsCamera_2018.826.98.0_neutral_~_8wekyb3d8bbwe\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsStore_11910.1002.5.0_x64__8wekyb3d8bbwe\VoiceCommands.xml	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxApp_48.49.31001.0_x64__8wekyb3d8bbwe\AppxSignature.p7x	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\Services\verisign.bmp	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxGameOverlay_1.46.11001.0_x64__8wekyb3d8bbwe\GameBar.exe	file.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\Media Renderer\DMR_48.jpg	file.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-private-l1-1-0.dll	file.exe
File opened for modification	C:\Program Files\Windows Media Player\fr-FR\setup_wm.exe.mui	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.1903.1152.0_x64__8wekyb3d8bbwe\System.Collections.Specialized.dll	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftStickyNotes_3.6.73.0_x64__8wekyb3d8bbwe\AppxSignature.p7x	file.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.20875.0_x64__8wekyb3d8bbwe\avfilter-7_ms.dll	file.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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	file.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

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
4424	vssadmin.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.tcw9lnz6q	file.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.tcw9lnz6q\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	file.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.tcw9lnz6q\DefaultIcon	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3912	vssvc.exe
Token: SeRestorePrivilege	3912	vssvc.exe
Token: SeAuditPrivilege	3912	vssvc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 1524	4564	file.exe	83
PID 4564 wrote to memory of 1524	4564	file.exe	83
PID 4564 wrote to memory of 1524	4564	file.exe	83
PID 1524 wrote to memory of 4424	1524	cmd.exe	86
PID 1524 wrote to memory of 4424	1524	cmd.exe	86

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\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4424

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact