blackbasta | ca0273c55507c3aae95539812c2c5d9bbdc80deb8e714360fe4bcc65d257aeb0

Analysis

max time kernel
140s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 12:59

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General

Target

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
Size

543KB
MD5

53fdeb923b1890d29b8f29da77995938
SHA1

a996ccd0d58125bf299e89f4c03ff37afdab33fc
SHA256

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e
SHA512

7c78e880f3d2dfc163625ff3d0b4676aa6a083dbbeac270520679f6b21d1c449c5af720ca7b9a68b5b3309e2de8d586cfed5d9b3a78d006e6d981a1aaf88c535
SSDEEP

12288:M1DTMHixr1moQqUiXINDl/m1s6BQio67VlAU:AzmoQqUiXw2s6yiVxR

Score

10^/10

blackbasta ransomware

Malware Config

Extracted

Path

C:\Program Files\readme.txt

Ransom Note

Your data are stolen and encrypted The data will be published on TOR website if you do not pay the ransom You can contact us and decrypt one file for free on this TOR site (you should download and install TOR browser first https://torproject.org) https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion:80/ Your company id for log in: ba7a7058-3531-4b67-bae6-d602e9110361

URLs

https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.onion:80/

Signatures

Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
ransomware blackbasta
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490
Renames multiple (5298) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops desktop.ini file(s) 1 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

description	ioc	process
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dlaksjdoiwq.jpg"	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

Drops file in Program Files directory 64 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

description	ioc	process
File created	C:\Program Files (x86)\Internet Explorer\SIGNUP\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ppd.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\ta\LC_MESSAGES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\A3DUtils.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN065.XML	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Grace-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Grace-ppd.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.25\api-ms-win-core-console-l1-1-0.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.5\ja\System.Web.Entity.Design.Resources.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Templates\1033\AdjacencyResume.dotx	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Internet Explorer\uk-UA\iexplore.exe.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Resource\Font\MinionPro-Bold.otf	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSIPC\sl\msipc.dll.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.0\System.Globalization.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\plugins\codec\librtpvideo_plugin.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\api-ms-win-core-timezone-l1-1-0.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\ar\LC_MESSAGES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\MSIPC\ru\msipc.dll.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0090-0409-1000-0000000FF1CE.xml	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-convert-l1-1-0.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_OEM_Perp-ppd.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_OEM_Perp-ul-phn.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\1033\POWERPNT.HXS	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial5-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Trial-pl.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\Eula.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Internet Explorer\IEShims.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\tipskins.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\it\System.IO.Log.Resources.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\AUDIOSEARCHSAPIFE.DLL	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\goopdateres_tr.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\plugins\audio_filter\libtrivial_channel_mixer_plugin.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\WordR_OEM_Perp-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\ga\LC_MESSAGES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\he\LC_MESSAGES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_OEM_Perp-ppd.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\gl\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\GoogleCrashHandler.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.185.17\msedgeupdate.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\learning_tools.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\cy.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.25\System.Collections.Specialized.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\Locales\am.pak	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\HarvardAnglia2008OfficeOnline.xsl	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\locale\bn\LC_MESSAGES\vlc.mo	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Reference Assemblies\Microsoft\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_KMS_Client_AE-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Common Files\System\Ole DB\de-DE\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\msadc\msdaremr.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.25\System.Diagnostics.Contracts.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Tw Cen MT.xml	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ja-jp.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.25\System.Xml.XPath.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\plugins\audio_filter\libdolby_surround_decoder_plugin.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019VL_MAK_AE-ul-phn.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\pa\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Common Files\Microsoft Shared\ink\pipres.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\jre\lib\net.properties	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nssckbi.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTest2-ul-oob.xrm-ms	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\en-US\tabskb.dll.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

4476 vssadmin.exe

pid	process
4476	vssadmin.exe

Modifies registry class 3 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 208 vssvc.exe
Token: SeRestorePrivilege 208 vssvc.exe
Token: SeAuditPrivilege 208 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	208	vssvc.exe
Token: SeRestorePrivilege	208	vssvc.exe
Token: SeAuditPrivilege	208	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.execmd.exe

description	pid	process	target process
PID 3136 wrote to memory of 2196	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 3136 wrote to memory of 2196	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 3136 wrote to memory of 2196	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 2196 wrote to memory of 4476	2196	cmd.exe	vssadmin.exe
PID 2196 wrote to memory of 4476	2196	cmd.exe	vssadmin.exe
PID 3136 wrote to memory of 4744	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 3136 wrote to memory of 4744	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 3136 wrote to memory of 4744	3136	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe

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\ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
"C:\Users\Admin\AppData\Local\Temp\ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe"
1⤵
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3136
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2196
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:4476
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
  2⤵
  PID:4744

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:208

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

T1491

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

C:\Program Files\readme.txt

Filesize
401B

MD5
ab8018847c007394feabfa8f14626ebc

SHA1
d4669c9e29be5e1f32d7c30bf65ec8bd72566b2f

SHA256
2967e1d97d32605fc5ace49a10828800fbbefcc1e010f6004a9c88ef3ecdad88

SHA512
0f893ccd2add411ed93cade6519f9d2faf22831c60c279f355355406b72d92670a33b6b04362becb2344f3ff0b6ff979d9c078b24628c9de65cd421cf43402b9

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