Analysis
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max time kernel
149s -
max time network
137s -
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
Static task
static1
Behavioral task
behavioral1
Sample
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Resource
win11-20250502-en
General
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Target
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
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Size
23KB
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MD5
3e685475a7d2b2289c7b3e4468b2f40c
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SHA1
f1288cfbf64ef40c84caaa94ddae58b9921d97c1
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SHA256
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4
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SHA512
a3ccfe3d37a257b69288df9a50a144ff2bd47f3c77cfa50fcb519650a71b7f47084e14271762a10a11bddec8703d8b4beaaff8bd9d60a6684ad0d98c6891ed5e
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOr9NNV5H/V36abQD9e0qQD9e0Z:uZ4FLz8ae+rOn8ae+rO2asM0RM0Z
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/1444-799-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5197) 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\Java\jdk-1.8\bin\api-ms-win-core-heap-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\xalan.md.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\management-agent.jar.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\j2gss.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardR_Trial-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_Grace-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Forms.Design.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\WindowsBase.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\Microsoft.WindowsDesktop.App.deps.json.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy\messages_fr.properties.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Grace-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardR_Retail-ul-phn.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_KMS_Client-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\WINWORD_COL.HXC.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskmenu\oskmenubase.xml.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\InputPersonalization.exe.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\it-IT\TabTip.exe.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ServiceProcess.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\lib\ir.idl.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\javacpl.exe.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\lcms.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\Bibliography\Author2XML.XSL.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\hwrenUSlm.dat.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Forms.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\PresentationFramework.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-memory-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\1033\DSMESSAGES.XML.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\rsod\excelmui.msi.16.en-us.boot.tree.dat.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\rsod\office32ww.msi.16.x-none.tree.dat.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Controls.Ribbon.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office15\pkeyconfig-office.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_K_COL.HXK.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-private-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\EntityPicker.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\sl.pak.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-filesystem-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\TellMeExcel.nrr.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\D3DCompiler_47_cor3.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\lib\javafx.properties.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\Microsoft.VisualBasic.Forms.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\lib\javaws.jar.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\FirstRunLogo.contrast-black_scale-80.png.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt\msipc.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL016.XML.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\zh-TW\tipresx.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-string-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ValueTuple.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\WindowsFormsIntegration.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\tr\UIAutomationTypes.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\PresentationUI.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\et.pak.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\java.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_SubTrial-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\WindowsFormsIntegration.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\WindowsBase.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdR_Retail-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessPipcR_OEM_Perp-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial2-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\EXCELPLUGINCORE.DLL.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365EduCloudEDUR_SubTrial-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Emit.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\UIAutomationProvider.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Xaml.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.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 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe"C:\Users\Admin\AppData\Local\Temp\3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1444
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
23KB
MD52328ec75a4747fc65dee6a057d15d638
SHA195c42ba3a316d971e28de76d0496e84c1acb8462
SHA2563cab7598c0f55cbe619880987c3b4d9682b6f7c14742f22c76351b9821bb0ae8
SHA512e1e23437fd6c1ba9a84071cc9da222f89c2078d9500abb8a341a05df041b9fcd18b198c5562aa74bf1e9c3d28085e87992fbad9d8f70f88a87df3d08bd01ca96
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Filesize
108KB
MD56b3d177596098dde81a4a1f09bb650f4
SHA131cef651544d31b4e23500865156f2199182ea3d
SHA256835c14f5a613a0db921feef6962094215180ea908d0e1b97ccae9d9819d677c2
SHA512804b8cbf1751fd31e1ab653c71df5a942d633d31c8fc778db996ff966bd8d3b412dbc0272803a231c739e258ed5431cb3fe5cdd33eb9f5d56cd5245713b98d69