blackbasta | ca0273c55507c3aae95539812c2c5d9bbdc80deb8e714360fe4bcc65d257aeb0

Analysis

max time kernel
161s
max time network
128s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-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 (498) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

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-1-5-21-2461186416-2307104501-1787948496-1000\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 opened for modification	C:\Program Files\7-Zip\Lang\kk.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\pt.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\bn.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\yo.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\Chess\es-ES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Common Files\System\wab32.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Mozilla Maintenance Service\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft Visual Studio 8\VSTA\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\kab.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Games\Minesweeper\MineSweeper.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ne.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Common Files\System\ja-JP\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Internet Explorer\en-US\iexplore.exe.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\Web Server Extensions\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Java\jre7\release	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft.NET\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\minidump-analyzer.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Elemental.thmx	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ga.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Installed_schemas14.xss	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Google\Chrome\Application\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\Hearts\it-IT\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\uninstall\uninstall.log	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\SpiderSolitaire\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\Mahjong\en-US\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\zh-tw.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Games\FreeCell\FreeCell.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Java\jdk1.7.0_80\lib\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Internet Explorer\en-US\F12Tools.dll.mui	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\INTLDATE.DLL	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\excelcnv.exe	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\GRAPH.EXE	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Common Files\System\de-DE\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Java\jre7\bin\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\VideoLAN\VLC\locale\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\1033\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\uninstall.log	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft SQL Server Compact Edition\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Internet Explorer\F12Tools.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\CSS7DATA000C.DLL	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft Sync Framework\v1.0\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\zh-cn.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Java\jre7\Welcome.html	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\browser\crashreporter-override.ini	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Microsoft Games\Solitaire\SolitaireMCE.lnk	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\application.ini	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\ext.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Slipstream.thmx	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Office\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\MSClientDataMgr\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\Hearts\es-ES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Common Files\System\DirectDB.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Google\Update\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\Mozilla Firefox\browser\omni.ja	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\EntityDataHandler.dll	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Internet Explorer\en-US\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Internet Explorer\de-DE\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\updater.ini	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Microsoft Games\Minesweeper\es-ES\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files (x86)\Microsoft Office\Office14\Document Parts\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\AUTHZAX.DLL	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File created	C:\Program Files\Internet Explorer\fr-FR\readme.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe
File opened for modification	C:\Program Files\7-Zip\Lang\sa.txt	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

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

File Deletion
T1070.004

Inhibit System Recovery
T1490

Processes:

vssadmin.exevssadmin.exe

pid process

2588 vssadmin.exe
2336 vssadmin.exe

pid	process
2588	vssadmin.exe
2336	vssadmin.exe

Modifies registry class 3 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe

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

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3008 vssvc.exe
Token: SeRestorePrivilege 3008 vssvc.exe
Token: SeAuditPrivilege 3008 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	3008	vssvc.exe
Token: SeRestorePrivilege	3008	vssvc.exe
Token: SeAuditPrivilege	3008	vssvc.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.execmd.execmd.exe

description	pid	process	target process
PID 1052 wrote to memory of 2744	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2744	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2744	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2744	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 2744 wrote to memory of 2588	2744	cmd.exe	vssadmin.exe
PID 2744 wrote to memory of 2588	2744	cmd.exe	vssadmin.exe
PID 2744 wrote to memory of 2588	2744	cmd.exe	vssadmin.exe
PID 2744 wrote to memory of 2588	2744	cmd.exe	vssadmin.exe
PID 1052 wrote to memory of 2308	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2308	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2308	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 1052 wrote to memory of 2308	1052	ae7c868713e1d02b4db60128c651eb1e3f6a33c02544cc4cb57c3aa6c6581b6e.exe	cmd.exe
PID 2308 wrote to memory of 2336	2308	cmd.exe	vssadmin.exe
PID 2308 wrote to memory of 2336	2308	cmd.exe	vssadmin.exe
PID 2308 wrote to memory of 2336	2308	cmd.exe	vssadmin.exe
PID 2308 wrote to memory of 2336	2308	cmd.exe	vssadmin.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⤵
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1052
- 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:2744
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2588
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2308
- - C:\Windows\SysWOW64\vssadmin.exe
    C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2336

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3008

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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