Analysis
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max time kernel
149s -
max time network
135s -
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, 07:23
Behavioral task
behavioral1
Sample
48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe
Resource
win10v2004-20250502-en
General
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Target
48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe
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Size
79KB
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MD5
25cbaade2ecdd1326806f57aa72d9457
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SHA1
586f408c97ca0d44e7788ace9e84a9ae123bd359
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SHA256
48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654
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SHA512
a406f7c2c50342a610b163f6d3ddbef38483065a127a9b201395cd8e766dad1cde2bf5e17262a9e945956da161a88c2bf78de3b4d908fb6e4119291303e23d00
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SSDEEP
1536:s7ZppApdIIC0L/twzIzYKBIvubxJZ899OlxfANrWc/ZkgBZs:spWpI0L/tsI987OrfO6qy
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/0x000800000002409c-1.dat family_cosmu behavioral1/files/0x000300000001f0cb-5.dat family_cosmu -
Renames multiple (5028) 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.WindowsDesktop.App\6.0.27\pt-BR\System.Windows.Forms.Primitives.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\ReachFramework.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\ReachFramework.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_OEM_Perp-ul-phn.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordR_Trial-ppd.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Common Files\microsoft shared\ink\it-IT\tabskb.dll.mui.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\images\default\linkedin_ghost_profile.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\ONENOTEM.EXE.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Common Files\System\ja-JP\wab32res.dll.mui.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Forms.Primitives.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Internet Explorer\ExtExport.exe.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Internet Explorer\ja-JP\ieinstal.exe.mui.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\cs\msipc.dll.mui.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Configuration.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\Microsoft.VisualBasic.Forms.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Yellow Orange.xml.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPointR_OEM_Perp-ppd.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordR_OEM_Perp-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\mip_clienttelemetry.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\PersonaSpy\office.core.operational.js.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.FileSystem.Primitives.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-handle-l1-1-0.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ONENOTE_F_COL.HXK.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\PresentationUI.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\System.Windows.Forms.Primitives.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-black_scale-80.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.StackTrace.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationClientSideProviders.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\WindowsFormsIntegration.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\security\blacklisted.certs.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-stdio-l1-1-0.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ServiceProcess.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp3-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\GRAPH_K_COL.HXK.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.scale-140.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\clretwrc.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Controls.Ribbon.resources.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy\messages_zh_TW.properties.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial-ppd.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Subscription5-pl.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Trial-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdCO365R_SubTest-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.contrast-white_scale-140.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\legal\javafx\directshow.md.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Trial-pl.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.reportviewer.winforms.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\Bibliography\Sort\TAG.XSL.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Expressions.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\release.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial2-pl.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\msoasb.exe.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_SubTest-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ul-phn.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.contrast-black_scale-80.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp3-ul-phn.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_MAK-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\bwclassic.dotx.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\BOMB.WAV.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000042\mecontrol.png.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Security.Cryptography.Pkcs.dll.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\dynalink.md.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessEntryR_PrepidBypass-ul-oob.xrm-ms.tmp 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.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 48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe"C:\Users\Admin\AppData\Local\Temp\48fcc0d0c84ae454ffc631274663046a7377e0765e407f73268d190f3ff64654.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2084
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
79KB
MD59686b65ffcd2bf1e8c749636555cf0c5
SHA1d4fafdb7efbfc251e340e4ef6c909074b03ba0f1
SHA2563fcf59c57b9c611fb94cbf27c68864d3811e7cbbd368e8cb6ff3905f44392ecf
SHA51205e588f85888341315fee7e3a690ec0feabf0071ad690188bf898991cfabfc4ad072559b19ba15f9c9435c73329f3052cf8f0e8e16df8c61e7b3f52e5ae0e473
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Filesize
160KB
MD5b81f19b61a479e72559ff27160e2e8a2
SHA126054f0bb6af14bd2d70d4e66219551f784b9413
SHA256a2db4f5ffcf8baec227e9869b15112f5ae6211574e67c3a3e080620470061dd8
SHA51288cc07da73fce238d8fa4bfc2de6c60ed3f85b2365bcaa11f9a7e24a295233f7f551b116fc2b5aca4333b646f90d8756b146ab95b7d035f74ed304b66a0e71e5