blackbasta | 723d1cf3d74fb3ce95a77ed9dff257a78c8af8e67a82963230dd073781074224

Analysis

max time kernel
145s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
24/05/2026, 01:39

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General

Target
sub_723d1cf3d74f.exe
Size 1.4MB
Sample260524-b3dc3sd14k
SHA256 723d1cf3d74fb3ce95a77ed9dff257a78c8af8e67a82963230dd073781074224
MD5 6441d7260944bcedc5958c5c8a05d16d
SHA1 46257982840493eca90e051ff1749e7040895584
SHA512 af88fd3a0a2728c811be524feee575d8d2d9623b7944021c83173e40dbec6b1fbe7bea64dcdd8f1dbebc7d8df76b40e5c9647e2586316ea46ceb191ebcf14d89
SSDEEP 24576:1p2gwjk6ikYhJ9lvGnYZvy48/V33ck7LnBAyldFu8hod/Qodly:1AgxkmvGnYWccjBAwFadRd
TLSH
T19B65D000B680C036FA722870556AABB2897EBC30976555CF23C43D7B6E726D19D3672F
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution blackbasta impact persistence ransomware

Malware Config

Extracted

Path

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

blackbasta

Ransom Note

ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/ Login ID: 26d371a9-efda-4e82-9989-01e292244d65 *!* 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

Family: Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
ransomware 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 (3022) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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-1-5-21-2824035265-2271499813-2042964211-1000\Software\Microsoft\Windows\CurrentVersion\Run\Skype = "C:\\Users\\Admin\\AppData\\Local\\Temp\\sub_723d1cf3d74f.exe"	sub_723d1cf3d74f.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.2104.12721.0_x64__8wekyb3d8bbwe\System.Runtime.Numerics.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\vreg\powerpivot.x-none.msi.16.x-none.vreg.dat	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files (x86)\Common Files\Microsoft Shared\ink\penkor.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\THIRDPARTYLICENSEREADME-JAVAFX.txt	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial3-ppd.xrm-ms	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\TXP_3color_Invoice_378.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.uk-ua.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Common Files\System\Ole DB\msdatl3.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-multibyte-l1-1-0.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WebpImageExtension_1.0.32731.0_x64__8wekyb3d8bbwe\Assets\SplashScreen.scale-125.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.40831.0_neutral_~_8wekyb3d8bbwe\AppxSignature.p7x	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\FileExtension.targetsize-63.png	sub_723d1cf3d74f.exe
File created	C:\Program Files (x86)\Internet Explorer\es-ES\instructions_read_me.txt	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files (x86)\Internet Explorer\de-DE\iexplore.exe.mui	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Images\Square150x150Logo.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\dbgshim.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Mozilla Firefox\browser\VisualElements\VisualElements_150.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Edge.GameAssist_1.0.3456.0_x64__8wekyb3d8bbwe\Assets\Square44x44Logo.targetsize-24_altform-unplated.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.GamingApp_2105.900.24.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\Xbox_MedTile.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_4.6.3102.0_x64__8wekyb3d8bbwe\Win10\MicrosoftSolitaireSmallTile.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxA-Generic-Light.scale-400.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxA-Google.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsStoreLogo.scale-200_contrast-white.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\Theme_Photo_RainbowCurve_Background_Dark.jpg	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.143.57\msedgeupdateres_sr-Latn-RS.dll	sub_723d1cf3d74f.exe
File created	C:\Program Files\Internet Explorer\instructions_read_me.txt	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Media Player\WMPMediaSharing.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Media Player\wmpnssci.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Trial-ul-oob.xrm-ms	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Todos_0.33.33351.0_x64__8wekyb3d8bbwe\Assets\Square44x44Logo.targetsize-16_contrast-white.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsNotepad_10.2102.13.0_x64__8wekyb3d8bbwe\Assets\inifile.targetsize-64.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-processthreads-l1-1-0.dll	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019VL_MAK_AE-ul-oob.xrm-ms	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsSoundRecorder_1.0.38.0_neutral_split.scale-200_8wekyb3d8bbwe\AppxSignature.p7x	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\Theme_Photo_AutumnLeaves_Background.jpg	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_MAKC2R-ul-oob.xrm-ms	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\Assets\PhotosAppList.targetsize-96_altform-unplated_contrast-white.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-80.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.MicrosoftStickyNotes_4.0.2.0_neutral_split.scale-125_8wekyb3d8bbwe\AppxManifest.xml	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-96_contrast-black.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\Theme_Photo_SunlitForest_Thumbnail_Dark.jpg	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.XboxIdentityProvider_12.50.6001.0_x64__8wekyb3d8bbwe\XboxIdp.exe	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-36_altform-unplated_contrast-white.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\2876_24x24x32.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Defender\ja-JP\MpAsDesc.dll.mui	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Media Player\Network Sharing\wmpnss_color48.jpg	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.2104.12721.0_x64__8wekyb3d8bbwe\LocalBridge.exe	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows NT\Accessories\uk-UA\wordpad.exe.mui	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-30_altform-unplated_contrast-black.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.scale-125.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Defender\es-ES\ProtectionManagement.mfl	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WebMediaExtensions_1.0.40831.0_neutral_split.scale-125_8wekyb3d8bbwe\resources.pri	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-256_altform-unplated_contrast-black.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\SmallTile.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.VP9VideoExtensions_1.0.41182.0_x64__8wekyb3d8bbwe\Assets\SmallTile.scale-100.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.40831.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-24_altform-unplated.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Microsoft.Terminal.TerminalControl\TSFInputControl.xaml	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\he-IL\tipresx.dll.mui	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_SubTest-pl.xrm-ms	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-16_altform-unplated.png	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\Windows Media Player\en-US\wmpnssci.dll.mui	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.StorePurchaseApp_12008.1001.1.0_x64__8wekyb3d8bbwe\StoreExperienceHost.exe	sub_723d1cf3d74f.exe
File opened for modification	C:\Program Files\WindowsApps\Microsoft.WindowsNotepad_10.2102.13.0_neutral_split.scale-100_8wekyb3d8bbwe\AppxSignature.p7x	sub_723d1cf3d74f.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	sub_723d1cf3d74f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sub_723d1cf3d74f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Interacts with shadow copies 3 TTPs 2 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
1060	vssadmin.exe
2876	vssadmin.exe

Modifies registry class 3 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.7878kr5jx\DefaultIcon	sub_723d1cf3d74f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.7878kr5jx	sub_723d1cf3d74f.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.7878kr5jx\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	sub_723d1cf3d74f.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2104	vssvc.exe
Token: SeRestorePrivilege	2104	vssvc.exe
Token: SeAuditPrivilege	2104	vssvc.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4940 wrote to memory of 2476	4940	sub_723d1cf3d74f.exe	81
PID 2476 wrote to memory of 1060	2476	cmd.exe	83
PID 1020 wrote to memory of 3656	1020	sub_723d1cf3d74f.exe	89
PID 3656 wrote to memory of 2876	3656	cmd.exe	91

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\sub_723d1cf3d74f.exe
"C:\Users\Admin\AppData\Local\Temp\sub_723d1cf3d74f.exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4940
- 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:2476
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1060

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2104

C:\Users\Admin\AppData\Local\Temp\sub_723d1cf3d74f.exe
C:\Users\Admin\AppData\Local\Temp\sub_723d1cf3d74f.exe
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1020
- 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:3656
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2876

Network

MITRE ATT&CK Enterprise v16

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

instructions_read_me.txt

Path C:\Program Files (x86)\instructions_read_me.txt
Size 1KB
SHA256 34757273c5e041f07b0352c51cfab2998ab676f3a39bc0f16a1b4d68f3fac4f8
MD5 ba21d49977850f54961ede73b7e9e480
SHA1 bd630b3dbe9d7139527c1ffdbb2161e7a9067ae0
SHA512 4bf9be5f41f7258357e838ba94f0aa2b7f17d8fe3266174aaf123156b422c4fb72e4d3fd36db7b2e3e9d13202202d2a6b0ecca06ee2a2a043ce6ad27ffd751e2
TLSH
T10C11262FA21F70A1435271C097BCEAA1F722A59CA353179738431A203260BD79226ABD
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1020-531-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/1020-1193-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/1020-1194-0x0000000002A90000-0x0000000002B74000-memory.dmp

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memory/1020-835-0x0000000002A90000-0x0000000002B74000-memory.dmp

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memory/1020-525-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/1020-834-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/4940-4-0x0000000003570000-0x0000000003654000-memory.dmp

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memory/4940-794-0x0000000003570000-0x0000000003654000-memory.dmp

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memory/4940-530-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/4940-0-0x00000000000B0000-0x0000000000225000-memory.dmp

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memory/4940-2-0x0000000003570000-0x0000000003654000-memory.dmp

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memory/4940-1-0x00000000000B0000-0x0000000000225000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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