Analysis
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max time kernel
140s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system -
submitted
21-12-2024 15:08
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
basta/basta.dll
Resource
win7-20240903-en
windows7-x64
10 signatures
150 seconds
Behavioral task
behavioral2
Sample
basta/basta.dll
Resource
win10v2004-20241007-en
windows10-2004-x64
5 signatures
150 seconds
Behavioral task
behavioral3
Sample
basta/blank.docx
Resource
win7-20240903-en
windows7-x64
3 signatures
150 seconds
Behavioral task
behavioral4
Sample
basta/blank.docx
Resource
win10v2004-20241007-en
windows10-2004-x64
7 signatures
150 seconds
General
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Target
basta/basta.dll
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Size
1023KB
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MD5
08378cd36fdbf69dba24d14393ad564d
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SHA1
c698e08ff114499e9fecf39fcbf23f652f1cdad8
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SHA256
764b1117262d33f0a69b4f4c72fad607b7c71c262f60b9b2b35a21e7f4967786
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SHA512
ef831fc12ad4831e180c9e5e9babbf1a2d8675a918992fc6f5306447b30e12de63e5034124e31a2d9517db4322e7aaf4a01cecf3239f2c6f6d459358849ef197
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SSDEEP
12288:jbXTgrBCnMCz5WYgeWYg955/155/UqgFUHx2lvyRJbhLvTcT+sqnhDik2BBD+/rF:jbTgrBCnjzgsKrd7m4+OmMlaT2BZSP2
Score
10/10
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: 3dd718a3-db04-485f-b882-250349c8a4de
*!* 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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Blackbasta family
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Renames multiple (9722) 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 3 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 (x86)\Microsoft Office\Office14\1033\DataServices\DESKTOP.INI rundll32.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\GrooveForms5\FormsStyles\Desert\TAB_ON.GIF rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\MST rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Europe\Oslo rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\en-US\InkObj.dll.mui rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\America\Inuvik rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\CAGCAT10\J0149481.WMF rundll32.exe File opened for modification C:\Program Files\Common Files\System\msadc\es-ES\msadcor.dll.mui rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\MEDIA\OFFICE14\AUTOSHAP\BD18204_.WMF rundll32.exe File opened for modification C:\Program Files\Reference Assemblies\Microsoft\Framework\v3.0\ja\System.IO.Log.Resources.dll rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\J0101857.BMP rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SY01491_.WMF rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\video_filter\libblend_plugin.dll rundll32.exe File opened for modification C:\Program Files\Windows Sidebar\Gadgets\RSSFeeds.Gadget\images\rss_headline_glow_floating.png rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Pacific\Kosrae rundll32.exe File opened for modification C:\Program Files\Windows Media Player\ja-JP\mpvis.dll.mui rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\stream_out\libstream_out_rtp_plugin.dll rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\1033\MSTORE_K_COL.HXK rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PAGESIZE\PGMN022.XML rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\PUBWIZ\BANNER.XML rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\codec\librtpvideo_plugin.dll rundll32.exe File created C:\Program Files\Microsoft Games\Chess\fr-FR\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00017_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\FD02153_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO00192_.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Google\Update\1.3.36.151\psmachine_64.dll rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolData\groove.net\GrooveForms4\FormsStyles\SlateBlue.css rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\Groove\ToolBMPs\TipsImage.jpg rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\Images\7.png rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\microsoft shared\ink\Microsoft.Ink.dll rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Australia\Currie rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\lua\http\css\ui-lightness\images\ui-bg_glass_100_f6f6f6_1x400.png rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\PRRTINST.WMF rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Office14\OutlookAutoDiscover\BTOPENWORLD.COM.XML rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\control\libwin_hotkeys_plugin.dll rundll32.exe File created C:\Program Files\Reference Assemblies\Microsoft\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\config\ModuleAutoDeps\org-openide-explorer.xml rundll32.exe File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Weather.Gadget\images\docked_blue_snow.png rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\SlideShow.Gadget\icon.png rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Weather.Gadget\images\undocked_blue_windy.png rundll32.exe File created C:\Program Files\Java\jre7\lib\zi\SystemV\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Java\jdk1.7.0_80\jre\lib\zi\Asia\Rangoon rundll32.exe File opened for modification C:\Program Files\7-Zip\Lang\sl.txt rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\RSSFeeds.Gadget\fr-FR\gadget.xml rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\PicturePuzzle.Gadget\it-IT\picturePuzzle.html rundll32.exe File opened for modification C:\Program Files\Microsoft Games\Multiplayer\Backgammon\en-US\bckgzm.exe.mui rundll32.exe File opened for modification C:\Program Files\Windows Sidebar\sidebar.exe rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\NA02404_.WMF rundll32.exe File opened for modification C:\Program Files\Java\jre7\lib\zi\Pacific\Guadalcanal rundll32.exe File created C:\Program Files\VideoLAN\VLC\lua\http\dialogs\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\Currency.Gadget\fr-FR\js\init.js rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Elemental.thmx rundll32.exe File opened for modification C:\Program Files\Common Files\Microsoft Shared\ink\hwrlatinlm.dat rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\access\libaccess_srt_plugin.dll rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\demux\libplaylist_plugin.dll rundll32.exe File created C:\Program Files (x86)\Common Files\System\ado\de-DE\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\CLIPART\PUB60COR\SO02253_.WMF rundll32.exe File opened for modification C:\Program Files\DVD Maker\Shared\DvdStyles\OldAge\NavigationLeft_SelectionSubpicture.png rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Templates\1033\MedianLetter.Dotx rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\System\Ole DB\xmlrw.dll rundll32.exe File opened for modification C:\Program Files (x86)\Microsoft Office\Document Themes 14\Theme Fonts\Grid.xml rundll32.exe File opened for modification C:\Program Files\Windows Sidebar\Gadgets\Calendar.Gadget\images\calendar_double_bkg.png rundll32.exe File opened for modification C:\Program Files (x86)\Windows Sidebar\Gadgets\RSSFeeds.Gadget\en-US\gadget.xml rundll32.exe File opened for modification C:\Program Files\Common Files\System\msadc\msadcs.dll rundll32.exe File opened for modification C:\Program Files\VideoLAN\VLC\plugins\stream_filter\libhds_plugin.dll rundll32.exe -
Modifies registry class 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.7wdojib58 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.7wdojib58\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.7wdojib58\DefaultIcon rundll32.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2848 notepad.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 1960 wrote to memory of 328 1960 rundll32.exe 33 PID 1960 wrote to memory of 328 1960 rundll32.exe 33 PID 1960 wrote to memory of 328 1960 rundll32.exe 33 PID 328 wrote to memory of 2848 328 cmd.exe 35 PID 328 wrote to memory of 2848 328 cmd.exe 35 PID 328 wrote to memory of 2848 328 cmd.exe 35
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\basta\basta.dll,#11⤵
- Drops desktop.ini file(s)
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1960 -
C:\Windows\system32\cmd.execmd.exe /c start /MAX notepad.exe c:\instructions_read_me.txt2⤵
- Suspicious use of WriteProcessMemory
PID:328 -
C:\Windows\system32\notepad.exenotepad.exe c:\instructions_read_me.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2848
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1KB
MD54ba06d41a13bc5f4ddc71cf6a48cf231
SHA1d83c4640b36339549130fcb008c6f5c8a6d67676
SHA2568e29eb9f02be51cbdc99f8ec9b90fb29f47806f9ca804590de548d5e06f47db5
SHA5129fe3e0546ece1c74b2b3f188fafb024309bb1048ce997c334a6fed9b9638f11aa0dc99784546241fc28893b207a239ed21f8189a51bd801bc65334bd082da88c