blackbasta | ca0273c55507c3aae95539812c2c5d9bbdc80deb8e714360fe4bcc65d257aeb0

Analysis

max time kernel
31s
max time network
121s
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

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
Size

543KB
MD5

998022b70d83c6de68e5bdf94e0f8d71
SHA1

b87a947f3e85701fcdadd733e9b055a65a3b1308
SHA256

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a
SHA512

2744b77f951bd2bb34b094dd3b54fcf8f7dca76e03c745809edc045749c814c7d88c9ddd69ad684a1c156716afae76b5ebec3f932d0f2a72b242878134f65647
SSDEEP

12288:M1DTMHixr1moQqUiXINDl/m1s6BQio67VlA:AzmoQqUiXw2s6yiVx

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 (2135) 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:

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-983155329-280873152-1838004294-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dlaksjdoiwq.jpg"	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

Drops file in Program Files directory 64 IoCs

Processes:

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

description	ioc	process
File opened for modification	C:\Program Files\Google\Chrome\Application\chrome.exe	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Integration\C2RManifest.Excel.Excel.x-none.msi.16.x-none.xml	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Subscription-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Retail-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019VL_MAK_AE-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Trial-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Mozilla Firefox\api-ms-win-crt-heap-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File created	C:\Program Files\Common Files\System\ado\ja-JP\readme.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ul.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\WordVL_MAK-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial5-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Mozilla Firefox\postSigningData	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\cs-CZ\readme.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_Subscription-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\7-Zip\Lang\gu.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Document Themes 16\Retrospect.thmx	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial2-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp2-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp3-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\7-Zip\Lang\tt.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp4-ul-phn.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial4-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Personal2019DemoR_BypassTrial180-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-heap-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\ApproveRestart.TTS	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-rtlsupport-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial4-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_Retail-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files (x86)\Microsoft.NET\RedistList\AssemblyList_4_client.xml	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\master_preferences	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp2-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_Grace-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_KMS_ClientC2R-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\SelectWrite.ods	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Common Files\System\wab32.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp4-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Configuration\readme.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00C1-0409-1000-0000000FF1CE.xml	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.es-es.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_MAKC2R-ul-phn.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_Retail-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\7-Zip\Lang\sl.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Access2019VL_KMS_Client_AE-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\StandardMSDNR_Retail-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Internet Explorer\es-ES\iexplore.exe.mui	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Java\jre-1.8\lib\tzdb.dat	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_Retail-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdXC2RVL_KMS_ClientC2R-ppd.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-rtlsupport-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Trial-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-namedpipe-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\StandardMSDNR_Retail-ul-oob.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File created	C:\Program Files\Microsoft Office\root\Office16\SAMPLES\readme.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File created	C:\Program Files\Common Files\microsoft shared\TextConv\readme.txt	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Common Files\microsoft shared\ink\ipsnor.xml	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-locale-l1-1-0.dll	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
File opened for modification	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Trial-pl.xrm-ms	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.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

2176 vssadmin.exe

pid	process
2176	vssadmin.exe

Modifies registry class 3 IoCs

Processes:

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico"	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 968 vssvc.exe
Token: SeRestorePrivilege 968 vssvc.exe
Token: SeAuditPrivilege 968 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	968	vssvc.exe
Token: SeRestorePrivilege	968	vssvc.exe
Token: SeAuditPrivilege	968	vssvc.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.execmd.exe

description	pid	process	target process
PID 4252 wrote to memory of 4572	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe	cmd.exe
PID 4252 wrote to memory of 4572	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe	cmd.exe
PID 4252 wrote to memory of 4572	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe	cmd.exe
PID 4572 wrote to memory of 2176	4572	cmd.exe	vssadmin.exe
PID 4572 wrote to memory of 2176	4572	cmd.exe	vssadmin.exe
PID 4252 wrote to memory of 1132	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe	cmd.exe
PID 4252 wrote to memory of 1132	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe	cmd.exe
PID 4252 wrote to memory of 1132	4252	7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.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\7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe
"C:\Users\Admin\AppData\Local\Temp\7883f01096db9bcf090c2317749b6873036c27ba92451b212b8645770e1f0b8a.exe"
1⤵
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4252
- 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:4572
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet
    3⤵
    - Interacts with shadow copies
    PID:2176
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet
  2⤵
  PID:1132

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:968

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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