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
05/06/2025, 08:15
Behavioral task
behavioral1
Sample
c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe
Resource
win11-20250502-en
General
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Target
c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe
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Size
85KB
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MD5
93b4f040d2459e0e9f51758492921bc8
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SHA1
b845596bc215479dc8e9abb08b02800a1242bd16
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SHA256
c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132
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SHA512
6c25264ea60156a0988f266ae1762cc2be884355cbe8aad4f439a34824103bc4f40730a9fb7443b7173f90610417f3700bccd550654fd7b2352ede178d167238
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SSDEEP
1536:s7ZppApdII1grC35rtLgnTVoAUZY/ECGn6cmi8eEXcBxOBxP:spWpT9InTVsZYFG6cZxnOnP
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/0x000500000002333e-1.dat family_cosmu behavioral1/files/0x000400000001ee71-5.dat family_cosmu -
Renames multiple (5105) 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\Office16\Interceptor.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-processthreads-l1-1-0.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Tw Cen MT.xml.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\UIAutomationProvider.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\UIAutomationTypes.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\UIAutomationClient.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\PresentationUI.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\System.Xaml.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_OEM_Perp-ul-phn.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Retail-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.Linq.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\PresentationUI.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\UIAutomationProvider.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\UIAutomationClient.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\msvcp120.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Common Files\microsoft shared\ink\nl-NL\tipresx.dll.mui.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Forms.Primitives.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.PowerView.PowerView.x-none.msi.16.x-none.xml.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-environment-l1-1-0.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ComponentModel.Primitives.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\npt.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Grace-ppd.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-pl.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\basicsimple.dotx.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\lcms.md.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Trial-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.scale-180.png.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msgrammar8.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Xaml.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL118.XML.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\7-Zip\7-zip.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Excel.ReportingServices.QueryDesigners.Extensions.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\hostpolicy.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\WindowsBase.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\ReachFramework.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\WindowsFormsIntegration.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jre-1.8\bin\j2pcsc.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jre-1.8\lib\management-agent.jar.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Riblet.eftx.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Common Files\System\msadc\msadcor.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial3-pl.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Trial-ppd.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000049\catalog.json.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\rsod\proof.fr-fr.msi.16.fr-fr.boot.tree.dat.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-synch-l1-1-0.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.Immutable.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\relaxngcc.md.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jre-1.8\lib\ext\zipfs.jar.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019VL_KMS_Client_AE-ul.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019MSDNR_Retail-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-pl.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\TellMeOneNote.nrr.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Java\jre-1.8\bin\msvcp140.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdO365R_SubTest-ppd.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_Subscription-ul-oob.xrm-ms.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN103.XML.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\System.Windows.Forms.Primitives.resources.dll.tmp c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.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 c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe"C:\Users\Admin\AppData\Local\Temp\c284bfd70aad3207fc289531fb05cda5d8154d3624718b7db91fac6569a60132.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:3632
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
85KB
MD5cf173ad08921514581161aa1f4a80066
SHA11da90abb340a6221e95bc341bbf48993b0eccfbf
SHA25679559197d7fb8459ab5ce16c2b4434f50bd97c93466a7c93407b03375d3d6cbb
SHA51213f4a92a8701a5893a2d13cfd10af95dbd5758d78e691845e700a2ec84f06f2ddba090bc54983c5ed297474c6b5029c4c9eece7dcc9a65728c044679fa795449
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Filesize
170KB
MD5edc42ae95460840fa4f3f0c674f17641
SHA1ca2ca9e08491bf54100bacf43221fd89d5be7e75
SHA2569ba785fddbc4feb4d8fb40acc257016d7c8219c20b1a0fa7dc0440878e6f7c0c
SHA51205c2f094fe9f22d4a4b7b8dc37281b3e09198258a18fede49d0542059a8d9a71ade559413d58fdfed6f56dbec5eadb952d4a893d012be3f0d0867910dc93ba57