blackbasta | 3337a7a9ccdd06acdd6e3cf4af40d871172d0a0e96fc48787b574ac93689622a

Analysis

max time kernel
128s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
05/02/2025, 16:58

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General

Target

file.exe
Size

885KB
MD5

80ab6a4d16c8137308dea1dc7922bd47
SHA1

796531afd0e828f451786c485f95c4c04084f461
SHA256

3337a7a9ccdd06acdd6e3cf4af40d871172d0a0e96fc48787b574ac93689622a
SHA512

4ccdf3049a7e4de8c63d5c37602eecdc97e727022c4b2bf0a582ab4aae9ee7e42f24b339cd46eb820baea5593fe19ef0806246f0dd3f8bc1560423fe512f6485
SSDEEP

24576:TP3urAYzBZm8R6pMQig/6203QAxUET69nkyjGjR:TPjYzq8R6pMQig/6203VxUEuhzGjR

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: 29b5e50f-69a3-48f0-9648-450b2cbfaab4 *!* 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-1-5-21-3551809350-4263495960-1443967649-1000\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\7-Zip\Lang\va.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\SLERROR.XML	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0341328.JPG	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Templates\1033\BlackTieNewsletter.dotx	file.exe
File created	C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSODCW.DLL	file.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\it-IT\wmplayer.exe.mui	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA01148_.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PH01247U.BMP	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0232393.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0282126.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Fonts\Office Classic.xml	file.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\ONBttnIELinkedNotes.dll	file.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\COPYING.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\IPDESIGN.DLL	file.exe
File opened for modification	C:\Program Files\Microsoft Games\Purble Place\de-DE\PurblePlace.exe.mui	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0145272.JPG	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\J0199727.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\Xlate_Init.xsn	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PAGESIZE\PGMN089.XML	file.exe
File created	C:\Program Files\VideoLAN\VLC\locale\be\instructions_read_me.txt	file.exe
File created	C:\Program Files\Common Files\Microsoft Shared\ink\ro-RO\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\Common Files\SpeechEngines\Microsoft\TTS20\MSTTSLoc.dll	file.exe
File opened for modification	C:\Program Files\7-Zip\Lang\be.txt	file.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\skins\winamp2.xml	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\DD01585_.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0174635.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0287644.JPG	file.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\fr-FR\MpEvMsg.dll.mui	file.exe
File opened for modification	C:\Program Files\Java\jre7\lib\rt.jar	file.exe
File opened for modification	C:\Program Files\Windows Sidebar\Gadgets\SlideShow.Gadget\logo.png	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO01954_.WMF	file.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\lib\fontconfig.bfc	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Travel\PassportMask_PAL.wmv	file.exe
File opened for modification	C:\Program Files\Windows Defender\MpClient.dll	file.exe
File created	C:\Program Files (x86)\Windows Sidebar\en-US\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\shadowonlyframe_buttongraphic.png	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107480.WMF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\SLINTL.DLL	file.exe
File opened for modification	C:\Program Files\Java\jre7\bin\rmid.exe	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\EXPLR_01.MID	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0341645.JPG	file.exe
File opened for modification	C:\Program Files\7-Zip\Lang\fy.txt	file.exe
File opened for modification	C:\Program Files\Windows Defender\en-US\MpEvMsg.dll.mui	file.exe
File opened for modification	C:\Program Files (x86)\Windows Photo Viewer\ja-JP\PhotoViewer.dll.mui	file.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipsnld.xml	file.exe
File created	C:\Program Files\Common Files\System\fr-FR\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\STSUCRES.DLL	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\CERT.DPV	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\Performance\title_trans_scene.wmv	file.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\Smart Tag\FPERSON.DLL	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AG00135_.GIF	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0233512.WMF	file.exe
File opened for modification	C:\Program Files\Mozilla Firefox\uninstall\helper.exe	file.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_bw120.png	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\TWCUTLIN.DLL	file.exe
File opened for modification	C:\Program Files\Java\jre7\bin\libxslt.dll	file.exe
File created	C:\Program Files\Windows Sidebar\Gadgets\Currency.Gadget\instructions_read_me.txt	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00483_.WMF	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\BabyGirl\content-foreground.png	file.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Stationery\1033\JUNGLE.HTM	file.exe
File opened for modification	C:\Program Files\DVD Maker\Shared\DvdStyles\HueCycle\title_stripe.png	file.exe
File created	C:\Program Files\VideoLAN\VLC\locale\fi\instructions_read_me.txt	file.exe
File created	C:\Program Files\Google\Chrome\instructions_read_me.txt	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	file.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\.h8g366bn5\DefaultIcon	file.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.h8g366bn5	file.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.h8g366bn5\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	file.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1868	file.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2220	vssvc.exe
Token: SeRestorePrivilege	2220	vssvc.exe
Token: SeAuditPrivilege	2220	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 2856	1868	file.exe	30
PID 1868 wrote to memory of 2856	1868	file.exe	30
PID 1868 wrote to memory of 2856	1868	file.exe	30
PID 1868 wrote to memory of 2856	1868	file.exe	30
PID 2856 wrote to memory of 2144	2856	cmd.exe	32
PID 2856 wrote to memory of 2144	2856	cmd.exe	32
PID 2856 wrote to memory of 2144	2856	cmd.exe	32
PID 2856 wrote to memory of 2144	2856	cmd.exe	32

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:1868
- 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:2856
- - 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:2220

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

Replay Monitor

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Downloads

C:\Program Files\instructions_read_me.txt

Filesize
1KB

MD5
3517c707dd4142b90fcb32bf4779f22a

SHA1
504e9f7202ad7c47ff0b50d7dbc75ddd81a6cf4c

SHA256
7d45dc97142395f62cd6c4f9dd4fb4fe507ee43435174f779ab1af944cf24675

SHA512
a40c61d253d4dedfdd9b1dd28d29272261d064a06c304baf00e7a6f07fd4e394cfe866105880a7ea8fde7d12b1b9f62e6cfc5f68ece96e9a4c4bf95c21907c8b

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