Analysis
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max time kernel
150s -
max time network
136s -
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, 08:18
Behavioral task
behavioral1
Sample
2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe
Resource
win10v2004-20250502-en
General
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Target
2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe
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Size
20KB
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MD5
401f409662f02e54c01551556b2b78dc
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SHA1
b93006da993eb0fe7871089d7dfd38af05ba64a5
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SHA256
2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b
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SHA512
ad96633ab0893330c61b08584b58ebdc13a52ac89f3459b771f45d8b03847172628e407fcfd95327174cbc8ef853ad0c929c7dce75e5467d5f3d12f39751e965
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SSDEEP
384:gBt7Br5xjL9AgA71FbhvP/KWLsqmFae+rOAqmFae+rOcZHZi:s7BlpppARFbhdLz8ae+rOn8ae+rOcZHQ
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/0x000500000002279a-1.dat family_cosmu behavioral1/files/0x000400000001ee71-5.dat family_cosmu -
Renames multiple (5282) 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\Google\Chrome\Application\133.0.6943.60\Locales\mr.pak.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-datetime-l1-1-0.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Interop.MSDASC.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\PresentationCore.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\libpng.md.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTrial-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Excel.Common.FrontEnd.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\BOMB.WAV.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Forms.Design.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationFramework.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Cryptography.X509Certificates.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\UIAutomationClientSideProviders.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\currency.data.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jre-1.8\lib\deploy\messages_it.properties.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000042\index.win32.bundle.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\api-ms-win-crt-conio-l1-1-0.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\7-Zip\Lang\io.txt.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sk-sk.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Common Files\microsoft shared\ink\uk-UA\TipTsf.dll.mui.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\Microsoft.Win32.Registry.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Drawing.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Cryptography.OpenSsl.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ComponentModel.DataAnnotations.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.StackTrace.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\Microsoft.VisualBasic.Forms.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Controls.Ribbon.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\el.pak.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-private-l1-1-0.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Subscription2-ppd.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00A1-0000-1000-0000000FF1CE.xml.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Inset.eftx.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp3-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jre-1.8\lib\tzdb.dat.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Retail-ppd.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Retail-ppd.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ppd.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sv\msipc.dll.mui.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\msoutilstat.etw.man.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\7-Zip\Lang\hr.txt.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Resources.Writer.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\System.Xaml.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Grace-ppd.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_KMS_Client-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_KMS_ClientC2R-ul.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_WHATSNEW.XML.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\7-Zip\Lang\eo.txt.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskclearui\oskclearuibase.xml.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.TraceSource.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Xaml.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationProvider.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\bin\jdeps.exe.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\cmm\sRGB.pf.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_Retail-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\awt.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\Office16\SLERROR.XML.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_OEM_Perp-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessEntry2019R_PrepidBypass-ul-oob.xrm-ms.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Microsoft Office\root\Office16\InstallerMainShell.tlb.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\7-Zip\Lang\ug.txt.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\Common Files\System\msadc\es-ES\msdaremr.dll.mui.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-console-l1-1-0.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.WebProxy.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\ReachFramework.resources.dll.tmp 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.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 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe"C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4748
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
21KB
MD5266d2fc19e3cf43a4f93ac58e3cdf479
SHA1f7fd1168d4c6baa48bab36f2557f87c19138cc45
SHA256fa964d30f09d65bf874fab12436549cee81acb2ce9a2a5c5ca7ab18fe14a557b
SHA51267348c1d19e31603de328cc9eba5dcde608b0a8ff5f054e1c5e6e345e99d88c2b017a9aa888bf73e568439cc7e40661df356b805852536891fd098bb25ae8234
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Filesize
106KB
MD5666203648e58e533ace1458b053a3f4a
SHA1f04b7e7030dd5eed4e94abe0d1c7fe137124bf4e
SHA256a860167b4c56e4ce0c249b20582a91fa106957167b370d232abba28f5ff0ef2a
SHA512fc45766986094ec786ac965c54fc1721aea10683d5016aad5857c9b47b5e791537214c3272114de231d72a6baab1bf60e4568287e3496bf999a18dcdaa963065