blackbasta | 62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087

Resubmissions

15-03-2024 10:54

240315-mz23tagg69 10

Analysis

max time kernel
57s
max time network
6s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
15-03-2024 10:54

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General

Target

txt.exe
Size

885KB
MD5

497ef4779c6770e4497adf0bc71655f1
SHA1

328a8793323f11c1d0c5f3ddedf4ae10caafb063
SHA256

62e63388953bb30669b403867a3ac2c8130332cf78133f7fd4a7f23cdc939087
SHA512

35c2c131a84205ecda974fc0cdf93db38184547586c28671379b13b98311289459b5b87c6c8ffa3233ccd42953d4faef47e27195ecd40011cc72cbf3b3e5af35
SSDEEP

24576:pAWf/LUup7zmMl8tOKnvwYQ62jaeekMEoBmn64:pTUS2Ml8trnvwYQ62japkMEQS64

Score

10^/10

blackbasta 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: 91ff2d86-ecd6-429f-9cfe-ef43ac53155b *!* 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
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

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-1-5-21-2248906074-2862704502-246302768-1000\Software\Microsoft\Windows\CurrentVersion\Run\Skype = "C:\\Users\\Admin\\AppData\\Local\\Temp\\txt.exe"	txt.exe

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Java\jre7\bin\jaas_nt.dll	txt.exe
File opened for modification	C:\Program Files\Java\jre7\Welcome.html	txt.exe
File opened for modification	C:\Program Files\Microsoft Games\Purble Place\fr-FR\PurblePlace.exe.mui	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\MSOERES.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\ja-JP\WMPMediaSharing.dll.mui	txt.exe
File opened for modification	C:\Program Files\Microsoft Games\More Games\it-IT\MoreGames.dll.mui	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107192.WMF	txt.exe
File opened for modification	C:\Program Files\Windows Journal\it-IT\jnwdui.dll.mui	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\es-ES\WMPMediaSharing.dll.mui	txt.exe
File opened for modification	C:\Program Files\Windows Defender\fr-FR\MpAsDesc.dll.mui	txt.exe
File created	C:\Program Files\Microsoft Games\Minesweeper\de-DE\instructions_read_me.txt	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\IpsPlugin.dll	txt.exe
File opened for modification	C:\Program Files\Windows Media Player\es-ES\setup_wm.exe.mui	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Peacock.htm	txt.exe
File opened for modification	C:\Program Files (x86)\Common Files\System\Ole DB\oledb32r.dll	txt.exe
File opened for modification	C:\Program Files\7-Zip\Lang\si.txt	txt.exe
File opened for modification	C:\Program Files\Microsoft Games\SpiderSolitaire\SpiderSolitaire.exe	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0090390.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107152.WMF	txt.exe
File opened for modification	C:\Program Files\DebugEnable.bin	txt.exe
File opened for modification	C:\Program Files\Java\jre7\bin\jawt.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe	txt.exe
File created	C:\Program Files\Common Files\System\instructions_read_me.txt	txt.exe
File opened for modification	C:\Program Files\Windows Media Player\wmpnetwk.exe	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\msproof7.dll	txt.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\java-rmi.exe	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\DD01145_.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\HH01461_.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0099174.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Defender\it-IT\MpEvMsg.dll.mui	txt.exe
File created	C:\Program Files (x86)\Common Files\microsoft shared\PROOF\instructions_read_me.txt	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Media Player\es-ES\WMPDMCCore.dll.mui	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0102762.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0105912.WMF	txt.exe
File opened for modification	C:\Program Files\FormatRevoke.dxf	txt.exe
File opened for modification	C:\Program Files\7-Zip\Lang\an.txt	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107134.WMF	txt.exe
File created	C:\Program Files\Windows Photo Viewer\fr-FR\instructions_read_me.txt	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSYUBIN7.DLL	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPCEXT.DLL	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\es-ES\sbdrop.dll.mui	txt.exe
File opened for modification	C:\Program Files\Mozilla Firefox\AccessibleMarshal.dll	txt.exe
File opened for modification	C:\Program Files\Mozilla Firefox\defaultagent_localized.ini	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0107258.WMF	txt.exe
File opened for modification	C:\Program Files\Windows NT\Accessories\WordpadFilter.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0105398.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Common Files\microsoft shared\ink\mshwjpn.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.151\goopdateres_sl.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0099151.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Document Themes 14\Flow.thmx	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AN01084_.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Portable Devices\sqmapi.dll	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\ink\ipssrb.xml	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\Bears.jpg	txt.exe
File opened for modification	C:\Program Files\Common Files\Microsoft Shared\Stationery\OrangeCircles.jpg	txt.exe
File opened for modification	C:\Program Files\Windows NT\TableTextService\ja-JP\TableTextService.dll.mui	txt.exe
File opened for modification	C:\Program Files\Windows Journal\de-DE\JNTFiltr.dll.mui	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\VVIEWER.DLL	txt.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\ja-JP\sbdrop.dll.mui	txt.exe
File opened for modification	C:\Program Files\Mozilla Firefox\api-ms-win-crt-environment-l1-1-0.dll	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\Installed_schemas14.xss	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\AN01218_.WMF	txt.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\BD09194_.WMF	txt.exe
File created	C:\Program Files (x86)\Reference Assemblies\instructions_read_me.txt	txt.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

pid	Process
1980	vssadmin.exe

Modifies registry class 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.pmnqvv85c\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	txt.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.pmnqvv85c\DefaultIcon	txt.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.pmnqvv85c	txt.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2740	txt.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2636	vssvc.exe
Token: SeRestorePrivilege	2636	vssvc.exe
Token: SeAuditPrivilege	2636	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2740 wrote to memory of 1696	2740	txt.exe	28
PID 2740 wrote to memory of 1696	2740	txt.exe	28
PID 2740 wrote to memory of 1696	2740	txt.exe	28
PID 2740 wrote to memory of 1696	2740	txt.exe	28
PID 1696 wrote to memory of 1980	1696	cmd.exe	30
PID 1696 wrote to memory of 1980	1696	cmd.exe	30
PID 1696 wrote to memory of 1980	1696	cmd.exe	30
PID 1696 wrote to memory of 1980	1696	cmd.exe	30

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\txt.exe
"C:\Users\Admin\AppData\Local\Temp\txt.exe"
1⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2740
- 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:1696
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:1980

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

T1112

Credential Access

Discovery

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
48fd4f0bdadd9e2a934c4aef789f7e13

SHA1
7e5c99a356f4fac0b9e538f8a2a8927d1c0c6850

SHA256
f1e74dfde27137949c2352cb782ed6b2d5cf5fcd2ad6fc1f6e91f2f89649e29e

SHA512
17ac0d35284095eea40c68a7d1ac2fb0eb7d19b429ffc072a4b4504a8b80ba7297958cf205a176fd3c651d18f8ba01e2b41f3155715c9e20a34b474e36cc4cb2

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