Analysis
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max time kernel
150s -
max time network
134s -
platform
windows10-2004_x64 -
resource
win10v2004-20250502-en -
resource tags
arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system -
submitted
05/06/2025, 07:27
Behavioral task
behavioral1
Sample
c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe
Resource
win10v2004-20250502-en
General
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Target
c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe
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Size
25KB
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MD5
1cf41b445e911cbb2b7e2bb63a3b8e2d
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SHA1
d7fe74e6682458f8251deab4259c359fc88ded76
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SHA256
c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84
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SHA512
1de7e1d3112f849d057a151fbc605c1e7d8679c77273a67d55980f22aab00ac9d71a5bfebeda2e82b18d81b4c17fbab7654b99d2faec2a7f093044648e3eca50
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SSDEEP
384:gBt7Br5xjL9AgA71FbhvP/KWLsqmFae+rOAqmFae+rOr9NNV5H/V36ac:s7BlpppARFbhdLz8ae+rOn8ae+rO2ac
Malware Config
Signatures
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Cosmu family
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Detects Cosmu payload 2 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral1/files/0x00080000000242af-1.dat family_cosmu behavioral1/files/0x000300000001f0d5-5.dat family_cosmu -
Renames multiple (5157) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\7-Zip\Lang\lv.txt.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Grace-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial1-ppd.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial-ppd.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_Subscription-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogo.contrast-black_scale-180.png.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\LibCurl64.DllA\OpenSSL64.DllA\openssl64.dlla.manifest.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\rsod\powerpivot.x-none.msi.16.x-none.boot.tree.dat.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\VisualElements\SmallLogoCanary.png.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-synch-l1-1-0.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest5-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\EssentialResume.dotx.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\7-Zip\Lang\fa.txt.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\WindowsBase.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaTypewriterBold.ttf.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Median.xml.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Dallas.OAuthClient.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOSB.DLL.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-filesystem-l1-1-0.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\kinit.exe.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.scale-100.png.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\System.Windows.Controls.Ribbon.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\asm.md.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-timezone-l1-1-0.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-ppd.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\include\jvmti.h.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\lib\charsets.jar.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Retail-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_SubTest-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\OSF.DLL.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\7-Zip\Lang\be.txt.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.FileSystem.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\Microsoft.VisualBasic.Forms.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\bin\schemagen.exe.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\rsod\powerview.x-none.msi.16.x-none.tree.dat.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\7-Zip\Lang\lij.txt.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\UIAutomationProvider.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\System.Windows.Forms.Design.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework-SystemDrawing.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-ppd.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Resources.ResourceManager.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_SubTrial-ppd.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\CSS7DATA000C.DLL.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\PresentationCore.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\security\cacerts.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalPipcR_OEM_Perp-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_Grace-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\cardview-flag.png.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsFormsIntegration.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationClient.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Input.Manipulations.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\dt_socket.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\lib\security\blacklisted.certs.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\Welcome.html.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ClientPreview_eula.txt.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\System.Windows.Forms.resources.dll.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Java\jre-1.8\legal\javafx\libxslt.md.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ul-oob.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardR_Trial-pl.xrm-ms.tmp c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe"C:\Users\Admin\AppData\Local\Temp\c9fda8aa3ced28ab18a3f40aa30b85968d3261e1b7ab6316680770420ee17d84.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4284
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
25KB
MD53e5118009fd42e047a35cf7fe53ea521
SHA15a461f9961978081e82ff1329498f5773c4675e7
SHA25638deec03f58ffcd72cea768d4493deb771397a6bdf223a306e9b81bf3399167e
SHA5125247db663c40c9dc199f33c99a750f4580bdc5f6ea57a7c5fc380271b060fc3186aa0912d0c16d2adadadefc0c948d9aa3065f1b4a5bac663e9a2accec5678df
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Filesize
106KB
MD5e03c9b613ab9ee83d6bf95e23709662b
SHA1c7c039803c70cdb818624eba1525f2b2cc73aab5
SHA256222abd1ab12a0e35502ddb96b0590b21082ca7c8f12c61c207b14b9ac8c806f5
SHA512b4272c7bb9bff37de058477dfef354a04398f3f9094115967ecdc29fd63f9d98665eb6090b8e5310dc0990193c60d8dffd1dd6c8f0dd21d7c8bc9218c0e697c5