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Analysis
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max time kernel
119s -
max time network
105s -
platform
windows7_x64 -
resource
win7-20221111-en -
resource tags
arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system -
submitted
03/12/2022, 06:22
Static task
static1
Behavioral task
behavioral1
Sample
81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe
Resource
win7-20221111-en
windows7-x64
8 signatures
150 seconds
Behavioral task
behavioral2
Sample
81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe
Resource
win10v2004-20220812-en
windows10-2004-x64
8 signatures
150 seconds
General
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Target
81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe
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Size
454KB
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MD5
30e360b69234e2f71a80a301ed582400
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SHA1
318d227272b198311ef9eb8e6721237c0f90fcd2
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SHA256
81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9
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SHA512
c5faea951492771eb9847536c03e0287e20d89f3c691861de78ae897ef2aed1c81fe4a4ab80ee49e9c46df516aa99babdae96aedecf94f0ada84681631048e40
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SSDEEP
6144:+ZyHOgf1NEoVAtlu8PN8yOqbXaDlnNahH7g5llqocky89guv7J/hSNcPMK7Codus:+vIgtlu8Pcail6bg53LRvuNcVG+GK
Score
10/10
Malware Config
Extracted
Path
C:\MSOCache\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/
Your company id for log in: aa6b49d0-713d-46fb-b7ac-fb5605e2ac0a
URLs
https://aazsbsgya565vlu2c6bzy6yfiebkcbtvvcytvolt33s77xypi7nypxyd.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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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dlaksjdoiwq.jpg" 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe -
Drops file in Program Files directory 64 IoCs
description ioc Process File opened for modification C:\Program Files\RedoSend.M2V 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\SelectUnblock.rtf 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Common Files\Services\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Common Files\System\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Common Files\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ApproveOpen.mpeg 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\NewOpen.ps1xml 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Mozilla Firefox\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\FormatBlock.wma 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ResolveApprove.emf 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Google\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\SplitRemove.vst 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\StopGroup.mht 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Microsoft Office\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\AddClose.dwfx 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\EnableSend.iso 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\RenameJoin.svgz 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Microsoft Games\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ShowProtect.vsw 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft.NET\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\MSBuild\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Uninstall Information\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\VideoLAN\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\LockInvoke.pot 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft Visual Studio 8\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Mozilla Maintenance Service\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Internet Explorer\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\BlockRepair.mp2v 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\CheckpointEdit.dib 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\UnprotectPublish.docx 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\UnpublishRepair.mpeg2 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ExpandUnlock.mpv2 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\LockBlock.vssm 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\DismountStart.xsl 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\InitializeStep.wmx 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Common Files\SpeechEngines\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\7-Zip\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\BackupWait.mpv2 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ConnectRename.ps1 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Common Files\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft Sync Framework\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Common Files\Microsoft Shared\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\MSBuild\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Reference Assemblies\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\MeasureNew.mht 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ReceiveMerge.asp 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\FormatMount.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\RevokeGet.vst 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft Office\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Reference Assemblies\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\WaitRegister.wpl 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Adobe\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft SQL Server Compact Edition\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Uninstall Information\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\Java\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\CloseConfirm.svgz 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\UnblockCompress.aiff 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\UnlockClear.vbe 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Internet Explorer\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files (x86)\Microsoft Synchronization Services\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File created C:\Program Files\DVD Maker\readme.txt 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe File opened for modification C:\Program Files\ExpandConfirm.asx 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe -
Interacts with shadow copies 2 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1128 vssadmin.exe 1108 vssadmin.exe -
Modifies registry class 3 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.basta 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.basta\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fkdjsadasd.ico" 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeBackupPrivilege 1872 vssvc.exe Token: SeRestorePrivilege 1872 vssvc.exe Token: SeAuditPrivilege 1872 vssvc.exe -
Suspicious use of WriteProcessMemory 16 IoCs
description pid Process procid_target PID 1060 wrote to memory of 2036 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 28 PID 1060 wrote to memory of 2036 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 28 PID 1060 wrote to memory of 2036 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 28 PID 1060 wrote to memory of 2036 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 28 PID 2036 wrote to memory of 1128 2036 cmd.exe 30 PID 2036 wrote to memory of 1128 2036 cmd.exe 30 PID 2036 wrote to memory of 1128 2036 cmd.exe 30 PID 2036 wrote to memory of 1128 2036 cmd.exe 30 PID 1060 wrote to memory of 1640 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 33 PID 1060 wrote to memory of 1640 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 33 PID 1060 wrote to memory of 1640 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 33 PID 1060 wrote to memory of 1640 1060 81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe 33 PID 1640 wrote to memory of 1108 1640 cmd.exe 35 PID 1640 wrote to memory of 1108 1640 cmd.exe 35 PID 1640 wrote to memory of 1108 1640 cmd.exe 35 PID 1640 wrote to memory of 1108 1640 cmd.exe 35
Processes
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C:\Users\Admin\AppData\Local\Temp\81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe"C:\Users\Admin\AppData\Local\Temp\81515e1c72fadae2c4bb15883e0c1d8979b49fd52d8c65ca03e05a75ca6683c9.exe"1⤵
- Sets desktop wallpaper using registry
- Drops file in Program Files directory
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1060 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet2⤵
- Suspicious use of WriteProcessMemory
PID:2036 -
C:\Windows\system32\vssadmin.exeC:\Windows\SysNative\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:1128
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Windows\System32\vssadmin.exe delete shadows /all /quiet2⤵
- Suspicious use of WriteProcessMemory
PID:1640 -
C:\Windows\SysWOW64\vssadmin.exeC:\Windows\System32\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
PID:1108
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1872