Analysis
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max time kernel
150s -
max time network
102s -
platform
windows11-21h2_x64 -
resource
win11-20250502-en -
resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system -
submitted
05/06/2025, 08:15
Static task
static1
Behavioral task
behavioral1
Sample
87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
Resource
win11-20250502-en
General
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Target
87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
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Size
22KB
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MD5
8b2f4ef74e4a20c23bc281110705ab70
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SHA1
b723dcc235faa790924821c84cd9d375fbae180c
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SHA256
87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182
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SHA512
88e19e4080ac010f41c5a83b26c5b6183025ad120681fe3fa50a80f4c2d54ec34ab394e2965318394226471c3d6f146cbabe63048132d2296b8fc3fe3a389ff9
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOiOZ2OZW0i90ixyX:uZ4FLz8ae+rOn8ae+rOWdxyX
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 behavioral2/memory/2080-1225-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5359) 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\Microsoft Office\root\Licenses16\Outlook2019R_OEM_Perp-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Common Files\System\Ole DB\de-DE\oledb32r.dll.mui.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\System.Xaml.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-sysinfo-l1-1-0.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00C1-0000-1000-0000000FF1CE.xml.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL087.XML.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Common Files\microsoft shared\ink\sv-SE\tipresx.dll.mui.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\netstandard.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\Accessibility.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jre-1.8\lib\meta-index.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\WWINTL.DLL.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Common Files\System\ja-JP\wab32res.dll.mui.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.AppContext.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Accessibility.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationProvider.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\ext\dnsns.jar.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jre-1.8\bin\mlib_image.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jre-1.8\lib\classlist.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\Office16\OSPP.VBS.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-timezone-l1-1-0.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.HttpListener.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\System.Windows.Forms.Primitives.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationFramework.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Georgia.xml.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial2-pl.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL107.XML.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7FR.DLL.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.IO.Packaging.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.contrast-white_scale-140.png.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\MSJH.TTC.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\concrt140.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Tasks.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ObjectModel.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Forms.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Drawing.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jdk-1.8\legal\javafx\libxml2.md.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-ppd.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.SPClient.Interfaces.DLL.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Handles.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-console-l1-2-0.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial2-ppd.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ClientLangPack2019_eula.txt.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\rsod\onenote.x-none.msi.16.x-none.tree.dat.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\ucrtbase.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.Contracts.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.Compression.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\System.Windows.Input.Manipulations.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jre-1.8\bin\jp2iexp.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusEDUR_SubTrial-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremDemoR_BypassTrial365-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_KMS_Client-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Numerics.Vectors.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Emit.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\PresentationUI.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.PowerView.PowerView.x-none.msi.16.x-none.xml.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_OEM_Perp-ul-phn.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ul.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_K_COL.HXK.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ospintl.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\PresentationUI.resources.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\jcup.md.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Java\jre-1.8\bin\gstreamer-lite.dll.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProMSDNR_Retail-ul-oob.xrm-ms.tmp 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.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 87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe"C:\Users\Admin\AppData\Local\Temp\87eb57e0a3fef69f3736666ffe2decf43804b6f69e460492a3abdca665677182.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2080
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
22KB
MD58823f741c74d4e7c8d65837c5a5fa010
SHA1f5cc66373ed63a44aa8b39273d7fdc1afc1d8b39
SHA25659846c783bc1a570db99aa8100772e43cf493132ed9d994fd0082b014e4c0085
SHA51238327d1b50aa6e9bda8a72a9985e0fea2456a4283e12ac58a66d4a73767389dc86773633e9c0b60874b04542dd9b6e98cc8d64c0eb493b4df7daf4a3bc71d575
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Filesize
103KB
MD5af1475e0b24b8dfccbf1c6ca8bb9ab7b
SHA161a1e44a428cc984ebf7c89f336f7e538c1eb8e9
SHA25607cad12750fcf4ffd78430900065b8bfa2ced809ea44fdb3db7a102945957cae
SHA512aec14f3cdde63374adf367549da31f6453dc91c5f4dcdfb44aa205e08c86fdbca1bbc85e6ac7cf8548718ca6c4bf451486d293672ea11d1288bbfb55ba715432