Analysis
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max time kernel
198s -
max time network
298s -
platform
windows10-1703_x64 -
resource
win10-20240404-en -
resource tags
arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system -
submitted
14-05-2024 04:59
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd.dll
Resource
win7-20240508-en
windows7-x64
8 signatures
300 seconds
Behavioral task
behavioral2
Sample
58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd.dll
Resource
win10-20240404-en
windows10-1703-x64
8 signatures
300 seconds
General
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Target
58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd.dll
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Size
448KB
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MD5
ce99e91e6c2a6defe1a86462870ba321
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SHA1
f3d31b5d4bec32a50e8a76430c801d1b8c4e6b70
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SHA256
58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd
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SHA512
005fc1fedaa4862134e3f38f6521302b6f9db82117b70e17c95157a4205a84348dbbcb5a037c125da89d32621740b4bf1613935da32a5555a8a1eb17b6f42106
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SSDEEP
12288:VPNXbjc+dHPgpgA6RiagtnIkJvEFZoZ/g1n:VFjZegjiagtnhOFZA/g1
Score
10/10
Malware Config
Extracted
Path
C:\Program Files (x86)\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: fff1e8d5-e1fb-4a01-99cf-eb3bb30fb61a
*!* 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
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Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
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Renames multiple (9594) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 1 IoCs
description ioc Process File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\DataServices\DESKTOP.INI rundll32.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\WindowsApps\Microsoft.VCLibs.140.00_14.0.24123.0_x64__8wekyb3d8bbwe\AppxMetadata\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsMaps_5.1611.10393.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\SecondaryTiles\Place\contrast-black\SmallTile.scale-100.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\tr-tr\ui-strings.js rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.People_10.1.10531.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\PeopleAppStoreLogo.scale-100.png rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\Fonts\private\GADUGIB.TTF rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\large\um_60x42.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\fss\js\nls\zh-tw\ui-strings.js rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\search-summary\js\nls\zh-tw\ui-strings.js rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\css\home-view.css rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\6365_72x72x32.png rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Templates\1033\OriginResume.Dotx rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\Microsoft Shared\Ink\it-IT\InkObj.dll.mui rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MSPaint_1.1702.28017.0_x64__8wekyb3d8bbwe\Assets\Logos\Square71x71\PaintSmallTile.scale-125.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\images\illustrations.png rundll32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\editpdf\js\nls\sl-si\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_MAK-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-white\OneNoteSmallTile.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsCamera_2017.125.40.0_neutral_split.scale-200_8wekyb3d8bbwe\Assets\WindowsIcons\WindowsCameraSmallTile.contrast-black_scale-200.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\createpdfupsell-app\js\nls\pt-br\ui-strings.js rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\tracked-send\js\plugins\tracked-send\images\cstm_brand_preview.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.BingWeather_4.18.56.0_x64__8wekyb3d8bbwe\Assets\AppTiles\Weather_LogoSmall.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\5313_20x20x32.png rundll32.exe File created C:\Program Files\VideoLAN\VLC\locale\zh_TW\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Retail-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\msvcp140_1.dll rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\PowerPointR_Grace-ppd.xrm-ms rundll32.exe File created C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\en-us\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Common Files\System\msadc\es-ES\msaddsr.dll.mui rundll32.exe File created C:\Program Files\Microsoft Office\root\Office16\Configuration\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.Windows.Photos_16.511.8780.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\PhotosSmallTile.contrast-black_scale-125.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsCamera_2017.125.40.0_neutral_split.scale-125_8wekyb3d8bbwe\Assets\WindowsIcons\WindowsCameraWideTile.scale-125.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\RtmMediaManager.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Flags\small\tv_16x11.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\core\dev\nls\sk-sk\ui-strings.js rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.SkypeApp_11.8.204.0_x64__kzf8qxf38zg5c\SkypeApp\Designs\Emoticons\small\kiss.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\OneNoteSectionGroupSmallTile.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_10.1702.333.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-30.png rundll32.exe File opened for modification C:\Program Files\Java\jdk-1.8\jre\lib\content-types.properties rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.DOC rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Office.OneNote_17.7668.58071.0_x64__8wekyb3d8bbwe\images\contrast-white\OneNoteAppList.targetsize-48.png rundll32.exe File created C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\GamePlayAssets\TriPeaks\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] rundll32.exe File created C:\Program Files\WindowsApps\Microsoft.NET.Native.Runtime.1.3_1.3.23901.0_x64__8wekyb3d8bbwe\AppxMetadata\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\DataModel\adal.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.1702.312.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\CalculatorMedTile.contrast-white_scale-100.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\app-center\js\nls\ko-kr\ui-strings.js rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-synch-l1-2-0.dll rundll32.exe File created C:\Program Files\Common Files\System\instructions_read_me.txt rundll32.exe File created C:\Program Files\Common Files\microsoft shared\ink\cs-CZ\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Arkadium.Win10.StarClub\Assets\fue_2_1.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MSPaint_1.1702.28017.0_x64__8wekyb3d8bbwe\Assets\Logos\Square150x150\PaintMedTile.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_11701.1001.87.0_x64__8wekyb3d8bbwe\Assets\AppTiles\contrast-black\StoreAppList.targetsize-96.png rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\THEMES16\SLATE\THMBNAIL.PNG rundll32.exe File created C:\Program Files\instructions_read_me.txt rundll32.exe File created C:\Program Files\WindowsApps\Microsoft.People_10.1.10531.0_x64__8wekyb3d8bbwe\_Resources\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\keystore\libfile_keystore_plugin.dll rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\packetizer\libpacketizer_vc1_plugin.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\contrast-black\LinkedInboxBadge.scale-100.png rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000049\index.win32.bundle.map rundll32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\my-computer-select\js\nls\sk-sk\instructions_read_me.txt rundll32.exe File created C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\WebResources\Resource0\static\js\plugins\ob-preview\js\nls\ca-es\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Java\jre-1.8\bin\java-rmi.exe rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftSolitaireCollection_3.14.1181.0_x64__8wekyb3d8bbwe\Assets\Audio\MenuClose_D.wav rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_17.7906.42257.0_x64__8wekyb3d8bbwe\images\contrast-white\GenericMailWideTile.scale-150.png rundll32.exe -
Modifies registry class 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.t94yhao94\DefaultIcon rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.t94yhao94 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.t94yhao94\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico" rundll32.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 1708 notepad.exe -
Suspicious use of WriteProcessMemory 9 IoCs
description pid Process procid_target PID 1888 wrote to memory of 5084 1888 rundll32.exe 73 PID 1888 wrote to memory of 5084 1888 rundll32.exe 73 PID 1888 wrote to memory of 5084 1888 rundll32.exe 73 PID 5084 wrote to memory of 7352 5084 rundll32.exe 75 PID 5084 wrote to memory of 7352 5084 rundll32.exe 75 PID 5084 wrote to memory of 7352 5084 rundll32.exe 75 PID 7352 wrote to memory of 1708 7352 cmd.exe 77 PID 7352 wrote to memory of 1708 7352 cmd.exe 77 PID 7352 wrote to memory of 1708 7352 cmd.exe 77
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1888 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\58ddbea084ce18cfb3439219ebcf2fc5c1605d2f6271610b1c7af77b8d0484bd.dll,#12⤵
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5084 -
C:\Windows\SysWOW64\cmd.execmd.exe /c start /MAX notepad.exe c:\instructions_read_me.txt3⤵
- Suspicious use of WriteProcessMemory
PID:7352 -
C:\Windows\SysWOW64\notepad.exenotepad.exe c:\instructions_read_me.txt4⤵
- Opens file in notepad (likely ransom note)
PID:1708
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD593efcdab5cb0f8a8f2e67b09a3af2357
SHA153458d51c28d0c713d0e6036081b57bb68ad3c27
SHA2568da6acc7b10038448df2769378963333d44a0f2546f64f65733077fb228edc7b
SHA512a8ec981e6397ae93955f1453b19d7c81550da1e1ed237b0ee6275cf478341c9ec2914472c5d4ecf0ebc26bfb962cf0b15a4b814feeffede70785973e6f2903c2