Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows - submitted
24/05/2026, 01:39
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
sub_1354254499b2.dll
Resource
win10v2004-20260513-en
windows10-2004-x64
4 signatures
150 seconds
Behavioral task
behavioral2
Sample
sub_1354254499b2.dll
Resource
win11-20260513-en
windows11-21h2-x64
4 signatures
150 seconds
General
- Target sub_1354254499b2.dll
- Size 1023KB
- Sample260524-b3c3bad14j
- SHA256 1354254499b2e3353708747d36c334074f40c1f726ea7590384f2192c972f8c3
- MD5 53a7c9b7ae1309fa2fda3cd9cd04d35d
- SHA1 0376101a6ba19ae78e70aa8ac355f73d2ba623ad
- SHA512 7950bf1455471f4c881d9b432a7bfdb31cc4e667a9c2c3acf59d1940b0604bb04493ea5b2dddba44be5665e8c9006c7d0c0a234c64d4d8fca4061e3467363e27
- SSDEEP 12288:MaltsKTwLqC5SWYgeWYg955/155/QUrTaUHx2eP9RJbBDv6cTWPb9lWzpk+hMry/:MaltsKTwLB5k5PbG7pf6BadFmCxvzO
- TLSH T199257C17639801A8D4BBD1B8899B8506E7F1789A13219BCF06E11E9F3F677F05A3E350
- MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
Malware Config
Extracted
Path
-
C:\Program Files (x86)\instructions_read_me.txt
-
blackbasta
Ransom Note
- ATTENTION! Your network has been breached and all data was encrypted. Please contact us at: https://bastad5huzwkepdixedg2gekg7jk22ato24zyllp6lnjx7wdtyctgvyd.onion/ Login ID: 56da98ec-b499-4ad2-b5d3-efd4f05df352 *!* 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
- Family: Black Basta
A ransomware family targeting Windows and Linux ESXi first seen in February 2022.
- Renames multiple (3664) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_OEM_Perp-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Retail-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarSplashLogo.scale-150.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-36_altform-lightunplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.MicrosoftOfficeHub_18.2104.12721.0_x64__8wekyb3d8bbwe\System.Buffers.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.NET.Native.Runtime.2.2_2.2.28604.0_x64__8wekyb3d8bbwe\AppxSignature.p7x rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessEntryR_PrepidBypass-ul-oob.xrm-ms rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019XC2RVL_MAKC2R-pl.xrm-ms rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Retail-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\api-ms-win-core-processthreads-l1-1-1.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxMailAppList.targetsize-72_altform-lightunplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\ImagePlaceholder_Color.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Getstarted_10.2.41172.0_x64__8wekyb3d8bbwe\Assets\TipsAppList.targetsize-80_altform-lightunplated_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Todos_0.33.33351.0_x64__8wekyb3d8bbwe\Assets\Square44x44Logo.targetsize-256.png rundll32.exe File opened for modification C:\Program Files (x86)\Common Files\System\uk-UA\wab32res.dll.mui rundll32.exe File opened for modification C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Xml.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.XboxGamingOverlay_2.50.24002.0_neutral_split.scale-125_8wekyb3d8bbwe\AppxBlockMap.xml rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.ZuneVideo_10.21012.10511.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\Logo.scale-100.png rundll32.exe File opened for modification C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AGMGPUOptIn.ini rundll32.exe File opened for modification C:\Program Files\7-Zip\Lang\zh-tw.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\DeletedAllUserPackages\Microsoft.WindowsMaps_1.0.22.0_neutral_split.scale-125_8wekyb3d8bbwe\AppxSignature.p7x rundll32.exe File opened for modification C:\Program Files\Internet Explorer\hmmapi.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_x64__8wekyb3d8bbwe\ThreeWayBlendPage.xbf rundll32.exe File created C:\Program Files (x86)\Common Files\Adobe\instructions_read_me.txt rundll32.exe File created C:\Program Files (x86)\Microsoft\EdgeUpdate_bk\1.3.143.57\instructions_read_me.txt rundll32.exe File created C:\Program Files\Microsoft Office\Updates\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.549981C3F5F10_2.2106.2807.0_x64__8wekyb3d8bbwe\OneSettingsClientForwarder.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsWideTile.scale-200.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\RunningLate.scale-64.png rundll32.exe File opened for modification C:\Program Files\Common Files\microsoft shared\ink\en-US\mshwLatin.dll.mui rundll32.exe File opened for modification C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\UIAutomationProvider.dll rundll32.exe File opened for modification C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework.Royale.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.40831.0_x64__8wekyb3d8bbwe\Microsoft_WebMediaExtensions.winmd rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp-pl.xrm-ms rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.HEIFImageExtension_1.0.40978.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-40.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Paint_10.2104.17.0_x64__8wekyb3d8bbwe\Assets\PaintAppList.targetsize-48.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WebMediaExtensions_1.0.40831.0_x64__8wekyb3d8bbwe\Assets\AppList.targetsize-40_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Microsoft.Terminal.Settings.Editor\Interaction.xaml rundll32.exe File created C:\Program Files\Common Files\microsoft shared\ink\pl-PL\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-math-l1-1-0.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxMailAppList.targetsize-32_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.UI.Xaml.2.4_2.42007.9001.0_x64__8wekyb3d8bbwe\Microsoft.UI.Xaml.winmd rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Grace-ppd.xrm-ms rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\WordR_Retail-ul-oob.xrm-ms rundll32.exe File opened for modification C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\mscorlib.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsStore_12104.1001.1.0_x64__8wekyb3d8bbwe\webviewBoot.min.js rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial5-ul-oob.xrm-ms rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-16_contrast-black.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsCalculator_10.2012.21.0_x64__8wekyb3d8bbwe\Assets\Date.targetsize-64_contrast-white.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxCalendarAppList.targetsize-16_altform-unplated.png rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Document Themes 16\Organic.thmx rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_Subscription-ul-oob.xrm-ms 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\WindowsApps\Microsoft.WindowsSoundRecorder_1.0.38.0_x64__8wekyb3d8bbwe\Assets\VoiceRecorderAppList.targetsize-48_contrast-black.png rundll32.exe File created C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_neutral_~_8wekyb3d8bbwe\AppxMetadata\instructions_read_me.txt rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Images\Square44x44Logo.targetsize-36_contrast-black.png rundll32.exe File opened for modification C:\Program Files\7-Zip\Lang\fa.txt rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Office16\Wordcnv.dll rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.Windows.Photos_21.21030.25003.0_neutral_split.scale-100_8wekyb3d8bbwe\Assets\PhotosBadgeLogo.contrast-black_scale-100.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsAlarms_1.0.36.0_x64__8wekyb3d8bbwe\Assets\AlarmsAppList.targetsize-36.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\microsoft.windowscommunicationsapps_16005.12827.20400.0_x64__8wekyb3d8bbwe\images\HxA-Generic-Light.scale-400.png rundll32.exe File opened for modification C:\Program Files\WindowsApps\Microsoft.WindowsTerminal_1.6.10571.0_x64__8wekyb3d8bbwe\Images\LockScreenLogo.scale-100_contrast-black.png rundll32.exe File opened for modification C:\Program Files\Common Files\System\Ole DB\ja-JP\sqloledb.rll.mui rundll32.exe File opened for modification C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-pl.xrm-ms rundll32.exe - Modifies registry class 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.y11o7dcib\DefaultIcon rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.y11o7dcib rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.y11o7dcib\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico" rundll32.exe
Processes
Network
MITRE ATT&CK Matrix
Replay Monitor
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Downloads
- Path C:\Program Files (x86)\instructions_read_me.txt
- Size 1KB
- SHA256 b54d6dde66a659069e69c8bac9af629b40f4907c1fc7b9fc1f76d5eb42384e50
- MD5 726ce44468fd2f6ae38e2e4bf2baee96
- SHA1 73afb5947c8ad295ea6b1b70826402346c070935
- SHA512 b26709072cc866150c492f92a6a1483a8582f6145cf8cfc10230797c9e0960e063fda58e2741ae1ed88ded0480184b2264b59d1554030df0cfd8afa2ca8c5113
- TLSH T17B11263F521F7161475271D19BBCEEA1F721A59CA35317973843152032A0BE792229BE
- MD5 SHA1 SHA512 TLSH