Analysis
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max time kernel
150s -
max time network
138s -
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
3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe
Resource
win10v2004-20250502-en
General
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Target
3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe
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Size
59KB
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MD5
915d7e5bf1043235648b85fb6f14a09e
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SHA1
db3d3355b64a6341619ca5a53ab8af7b7c3e0769
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SHA256
3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82
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SHA512
1b3df3669d9a340aba2526ac8202d9cb3472ba049042fa6460e9ff093bdee59d4e33cfd0eb70181802f2d6a3b999370a0bc7462e87389e29fd1106465d51dc0b
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SSDEEP
768:s7BlpppARFbhdLz8ae+rOn8ae+rOCjQjyZLhs8+R6+DF7QWdTTOYqV7:s7ZppApdIICjQjyZNs8+R6+DF7nOF7
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/0x000d000000023f3d-1.dat family_cosmu behavioral1/files/0x000300000001f083-5.dat family_cosmu -
Renames multiple (5047) 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\ProjectStdO365R_SubTrial-pl.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\WordCombinedFloatieModel.bin.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_Grace-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\WindowsFormsIntegration.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\mscordaccore_amd64_amd64_7.0.1624.6629.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Globalization.Calendars.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\UIAutomationProvider.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\UIAutomationTypes.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\bin\java-rmi.exe.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-memory-l1-1-0.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdR_Retail-ul-phn.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\VVIEWDWG.DLL.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebSockets.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jre-1.8\lib\fontconfig.bfc.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\CLICK.WAV.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jre-1.8\lib\security\java.policy.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\PackageManifests\AuthoredExtensions.16.xml.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\Microsoft.CSharp.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Data.Common.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\System\Ole DB\it-IT\sqlxmlx.rll.mui.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\System.Xaml.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\win32_CopyDrop32x32.gif.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\Microsoft.DataStreamer.Excel.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Standard2019R_Retail-ul-phn.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL092.XML.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\ko-kr.xml.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.WindowsDesktop.App.deps.json.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_SubTest-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\images\default\linkedin_ghost_profile_large.png.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Console.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationProvider.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\wpfgfx_cor3.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\bin\jstat.exe.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0000-1000-0000000FF1CE.xml.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Grace-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.PowerBI.Diagnostics.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Threading.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\j2pkcs11.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jre-1.8\bin\javaw.exe.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Grace-ppd.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\7-Zip\Lang\de.txt.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ar-sa.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.NameResolution.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\WindowsBase.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial3-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\1036\MSO.ACL.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\Bibliography\Author2String.XSL.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-runtime-l1-1-0.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-utility-l1-1-0.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ink\en-US\InputPersonalization.exe.mui.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.XmlSerializer.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Core.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Xaml.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\System.Windows.Input.Manipulations.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_ViewOnly_ZeroGrace-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Common Files\microsoft shared\ink\hwrlatinlm.dat.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Forms.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\PresentationCore.resources.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\j2pcsc.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jre-1.8\lib\tzdb.dat.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_Grace-ul-oob.xrm-ms.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART2.BDR.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\jp2native.dll.tmp 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.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 3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe"C:\Users\Admin\AppData\Local\Temp\3bd983a439a55277a98b813b27babc9b8c0cccf54a088478b8b1cdacf4cbec82.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1244
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
59KB
MD59f85a90dab8278849d2e8b6ba7b464c3
SHA11ef8111001c2b5546714fe5aab937fe81944f0fc
SHA25650476bf3efb60a4b37f68909efdafe310c0bb8fdcf3585d0b2ff5f109681f56f
SHA512706c9aa46883bf3034e6d823c4c9682463aa4734145e147993109f36dac77a320ebb3a0a76788ece7ad594dad187bd9006287b3f376d88153e35004ce7e8afe2
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Filesize
140KB
MD5929d1db62a8da09b40bdd5f45b310eb5
SHA1e4c5ff0253b48275ee0c99d8ee4ab338d8f7d6f6
SHA25600f681e4b994f2e05b1f1254882d74fcb45ba6bffa23601c0aadbfa4c19f37e2
SHA512d8f6cb6cf1430fc7662f41d3e0722bb1b6cadd1a1de75d0a82ea263e58e462285b0532741eab8b228d099d6a66306328377e05b8ea2bbca236a287e5ec23767e