blackbasta | d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d

Analysis

max time kernel
145s
max time network
14s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
05/02/2025, 16:58

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General

Target

file.exe
Size

885KB
MD5

b648b7305df49492c44a1280ec2228a0
SHA1

ce77bd3224f47ae4b8a04bd4b4be91c3550de294
SHA256

d73f6e240766ddd6c3c16eff8db50794ab8ab95c6a616d4ab2bc96780f13464d
SHA512

2b2bb13bedbce537f28cd58e23e54ace05f717ac1e4e3e4672768a4604e99ce9f35ee377ecd0677713729d066a1f730050d968f4a8dc3cb3cf6f5aaf86cd9737
SSDEEP

24576:pIr/f/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn6o:pMUS2Ml8trnvwYQ62japkMEQS6o

Score

10^/10

blackbasta defense_evasion discovery execution impact persistence ransomware

Malware Config

Extracted

Path

C:\Program Files\instructions_read_me.txt

Family

blackbasta

Ransom Note

ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/ Login ID: d87708c4-408b-4b02-97b9-071781f49f9c *!* 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://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.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

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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Skype = "C:\\Users\\Admin\\AppData\\Local\\Temp\\file.exe"	file.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Windows Defender\it-IT\MpAsDesc.dll.mui	file.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\hwritash.dat	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Couture.thmx	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Equity.thmx	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_client.xml	file.exe
File opened for modification	C:\Program Files\Java\jre7\bin\javafx-font.dll	file.exe
File created	C:\Program Files\VideoLAN\VLC\hrtfs\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\ink\micaut.dll	file.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\msoe.dll	file.exe
File created	C:\Program Files\DVD Maker\es-ES\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javac.exe	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\EQUATION\EQNEDT32.EXE	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BL00248_.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Internet Explorer\networkinspection.dll	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PSTPRX32.DLL	file.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jvisualvm.exe	file.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\goopdateres_ru.dll	file.exe
File opened for modification	C:\Program Files\Windows NT\TableTextService\TableTextServiceArray.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\WORDIRMV.XML	file.exe
File opened for modification	C:\Program Files\Windows NT\Accessories\es-ES\wordpad.exe.mui	file.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\goopdateres_vi.dll	file.exe
File opened for modification	C:\Program Files\Mozilla Firefox\freebl3.dll	file.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\ja-JP\mpvis.dll.mui	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Waveform.thmx	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\Ole DB\msdaer.dll	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BD05119_.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BS01635_.WMF	file.exe
File opened for modification	C:\Program Files\Windows Media Player\ja-JP\WMPDMC.exe.mui	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Austin.thmx	file.exe
File created	C:\Program Files\Common Files\Microsoft Shared\VGX\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\LogTransport2.exe	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\PROOF\MSWDS_ES.LEX	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\ado\msado26.tlb	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\msadc\msadco.dll	file.exe
File opened for modification	C:\Program Files\Mozilla Firefox\locale.ini	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSPUB.EXE	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\photoedge_selectionsubpicture.png	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BL00261_.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\ja-JP\MpEvMsg.dll.mui	file.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\Media Renderer\avtransport.xml	file.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\oledb32.dll	file.exe
File created	C:\Program Files\Microsoft Games\Solitaire\ja-JP\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Microsoft Games\Minesweeper\MineSweeper.dll	file.exe
File created	C:\Program Files\Windows Media Player\Skins\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ext.txt	file.exe
File opened for modification	C:\Program Files\Windows Journal\Templates\Shorthand.jtp	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Dot.png	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\ink\InkObj.dll	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\OFFICE14\MSOICONS.EXE	file.exe
File created	C:\Program Files (x86)\Google\Update\Install\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Mozilla Firefox\api-ms-win-crt-time-l1-1-0.dll	file.exe
File opened for modification	C:\Program Files\Windows Photo Viewer\ImagingEngine.dll	file.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\javaws.exe	file.exe
File opened for modification	C:\Program Files\Java\jre7\bin\fontmanager.dll	file.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\VSTA\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Windows Media Player\it-IT\WMPSideShowGadget.exe.mui	file.exe
File opened for modification	C:\Program Files\Windows Photo Viewer\ja-JP\PhotoAcq.dll.mui	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\mset7db.kic	file.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\InkWatson.exe	file.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipsnld.xml	file.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jabswitch.exe	file.exe
File created	C:\Program Files (x86)\Common Files\Adobe\Updater6\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\DAO\dao360.dll	file.exe
File opened for modification	C:\Program Files\DVD Maker\Pipeline.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
2144	vssadmin.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.busrr6agx\DefaultIcon	file.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.busrr6agx	file.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.busrr6agx\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	file.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1268	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	668	vssvc.exe
Token: SeRestorePrivilege	668	vssvc.exe
Token: SeAuditPrivilege	668	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1268 wrote to memory of 2320	1268	file.exe	29
PID 1268 wrote to memory of 2320	1268	file.exe	29
PID 1268 wrote to memory of 2320	1268	file.exe	29
PID 1268 wrote to memory of 2320	1268	file.exe	29
PID 2320 wrote to memory of 2144	2320	cmd.exe	31
PID 2320 wrote to memory of 2144	2320	cmd.exe	31
PID 2320 wrote to memory of 2144	2320	cmd.exe	31
PID 2320 wrote to memory of 2144	2320	cmd.exe	31

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⤵
- Adds Run key to start application
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1268
- 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:2320
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2144

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

T1047

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Direct Volume Access

T1006

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

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Downloads

C:\Program Files\instructions_read_me.txt

Filesize
1KB

MD5
3ea719301224c4cc13063efa4fd91d8f

SHA1
f49feaf562566e94c4eca8c151624e9bf39775bf

SHA256
6785977e363ed614f778efc564c6b3c5d28473a8c14c895793d0c9c791374f8d

SHA512
ac1db933bc28cc419022ff2bbeb15d8ba860a6a00f6dfd9b1f1774596a1ee2cbb09476ca09a2960f9db4b9b78738953a23cd1d332ff44fffa78e610348eef524

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