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
29/05/2025, 10:01
Static task
static1
Behavioral task
behavioral1
Sample
3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe
Resource
win11-20250502-en
General
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Target
3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe
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Size
33KB
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MD5
081992eb1480801df44c28dcfeee542f
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SHA1
024ffc4694af9734d1032294171fd20e2618fa2a
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SHA256
3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52
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SHA512
dbbb11b7d1cfd55dcd205c3161f9e03ca1c2f66b1705e9c67000657ac6ae46cd07dad4c52199f4c76410d01326a24322816ae1e541a6d0f1a40a3ed583a5aac2
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOYE/AE/DZKNZKy7MwlwWP3:uZ4FLz8ae+rOn8ae+rOrZkZ/7M45P3
Malware Config
Signatures
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Cosmu family
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Detects Cosmu payload 1 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral1/memory/1948-795-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5241) 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\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-file-l2-1-0.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\PresentationCore.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest4-ul-oob.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ospintl.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOLoaderUI.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.Timer.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\System.Windows.Forms.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\sk.pak.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest3-pl.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_KMS_Client-ul-oob.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProMSDNR_Retail-pl.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\PresentationCore.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\hr.pak.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Grace-ppd.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-oob.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOSYNC.EXE.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7ES.LEX.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\7-Zip\7z.exe.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\microsoft shared\ink\fr-FR\TipTsf.dll.mui.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\System\Ole DB\es-ES\oledb32r.dll.mui.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.IsolatedStorage.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Globalization.Extensions.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Forms.Primitives.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy.jar.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Inset.eftx.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\ReachFramework.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_O16ConsumerPerp_Bypass30-ppd.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPointVL_MAK-pl.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp3-ul-oob.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\tracedefinition130.xml.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\pl\msipc.dll.mui.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Linq.Queryable.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\System.Windows.Forms.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\VisualElements\SmallLogoDev.png.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-process-l1-1-0.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jre-1.8\bin\mlib_image.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_KMS_Client-ppd.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\MML2OMML.XSL.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\hr\msipc.dll.mui.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\System\ado\adovbs.inc.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\System\ado\msadomd.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Cryptography.Csp.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\System.Windows.Forms.Design.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-filesystem-l1-1-0.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\legal\javafx\webkit.md.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\lib\jconsole.jar.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jre-1.8\lib\amd64\jvm.cfg.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.fi-fi.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\relaxngdatatype.md.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\MICROSOFT.DATA.RECOMMENDATION.CLIENT.CORE.DLL.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\ContemporaryPhotoAlbum.potx.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\7-Zip\Lang\ga.txt.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskpred.xml.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jre-1.8\lib\deploy\messages_zh_HK.properties.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-heap-l1-1-0.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProVL_KMS_Client-ul.xrm-ms.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.UnmanagedMemoryStream.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-math-l1-1-0.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.exe.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\7-Zip\Lang\lij.txt.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\Common Files\System\es-ES\wab32res.dll.mui.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationClient.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\PresentationFramework.resources.dll.tmp 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.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 3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe"C:\Users\Admin\AppData\Local\Temp\3500d96919a1e8e68af1c39bd63076ab57e67bd051a1b0aad0a259d17d7f2d52.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1948
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
33KB
MD58e0171ec4ca30e665d3b127e483682b4
SHA17fe724c155e5f662d235c90375b6c20e80844532
SHA2560cb0595fec135641ef33682fb7f37afcfb812c80f0f38401530fad824367458f
SHA5128983889f2ae6e57213ccf832ed4fa6027868be3ff6409cf2497cb1f45ace8973e174b20f11e48a9d15825a0406368671c4cdf8e65a2a896410219ffa92f2b06f
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Filesize
114KB
MD5aa4a7d849d315496eb9e13927d8fe4c0
SHA113e0b964de7e44cf8cc55641d92d1f3df9e5eef0
SHA256b2c8199e98cc71a685cb8361457baecd54ff9ac62337380f62bfeec3e55f6d47
SHA512d386c3cc03326d09ab34bf942a94ee46560cd8d9214450f9945bc5bf475c997e10d6e19bdb5af71da2a07ce7c9f986ce0e03d919092d2e13b61f9e0783d592ee