Analysis
- 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
28/05/2025, 08:16
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe
Resource
win10v2004-20250502-en
windows10-2004-x64
6 signatures
150 seconds
General
- Target 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe
- Size 17KB
- Sample250528-j6fxdahn5x
- SHA256 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7
- MD5 818fe06cdbca10fef43f426d32cbdddc
- SHA1 902d7d1c69c91d83a3c84ef990202812dd7a3d8d
- SHA512 84475300c64d05c4d864389a1a47edd8622a38a7a168304eea8ec3c9b00a9e1a9016dda0273481b7b2d579be519267fa05b61cf41e19f487318a96ce307da5fd
- SSDEEP 384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOwMB:uZ4FLz8ae+rOn8ae+rOJ
- MD5 SHA1 SHA512 SSDEEP
Score
10/10
Malware Config
Signatures
- Cosmu family
- Detects Cosmu payload 1 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral1/memory/3272-813-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu - Renames multiple (5344) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\7-Zip\Lang\he.txt.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ink\hwrdeush.dat.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\System.Windows.Forms.Design.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\Microsoft.VisualBasic.Forms.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Design.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\PrivacySandboxAttestationsPreloaded\privacy-sandbox-attestations.dat.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPointR_Trial-ppd.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019DemoR_BypassTrial180-ppd.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\keypad.xml.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\CancelGlyph.16.White.png.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\UIAutomationClientSideProviders.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\thaidict.md.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ru-ru.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\api-ms-win-core-timezone-l1-1-0.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\symbols.xml.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Drawing.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\jsse.jar.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\legal\javafx\glib.md.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN048.XML.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\nslist.hxl.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Printing.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_OEM_Perp-pl.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Retail-ul-phn.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019VL_MAK_AE-ppd.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Excel.BackEnd.XmlSerializers.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogo.contrast-black_scale-80.png.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\TimeCard.xltx.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.Compression.ZipFile.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\PresentationFramework.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\Microsoft.VisualBasic.Forms.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\es-419.pak.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\hi\msipc.dll.mui.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sr-Cyrl-RS\msipc.dll.mui.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\7-Zip\Lang\tt.txt.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\System\ado\msado60.tlb.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-console-l1-2-0.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework.AeroLite.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\notification_helper.exe.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\ext\zipfs.jar.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msgr3jp.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\Blog.dotx.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\vcruntime140.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\ReachFramework.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\sv.pak.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_MAK-ul-phn.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-ul-oob.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.ReportingServices.ProgressiveProcessing.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogoSmall.contrast-white_scale-100.png.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogo.contrast-black_scale-180.png.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\Cultures\OFFICE.ODF.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Web.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\ucrtbase.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\java-rmi.exe.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\accessibility.properties.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProXC2RVL_MAKC2R-pl.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Retail-ul-phn.xrm-ms.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Microsoft Office\root\Office16\Tec.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ink\sk-SK\tipresx.dll.mui.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\coreclr.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Emit.ILGeneration.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\UIAutomationClientSideProviders.resources.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Java\jdk-1.8\bin\kinit.exe.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-core-xstate-l2-1-0.dll.tmp 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.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 65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe"C:\Users\Admin\AppData\Local\Temp\65683b7b3685451cec3e4ec3bd32659c740fc36877c80560a2b3e743073589b7.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:3272
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
- Path C:\$Recycle.Bin\S-1-5-21-3674642747-2260306818-3009887879-1000\desktop.ini.tmp
- Size 18KB
- SHA256 082e6e1ec76bb47348ba2d4c037f176bc51adac02f5a2a8c9df4b4d6093970a2
- MD5 ecb6e8442cd36d14e2214d3998307241
- SHA1 fa3602b6b31df30bd815a987ff848319078a236c
- SHA512 162ff64a2767a5293fb570b3cc97f8f7de5f4f55fc3e32e0f041559862333ea293649699df04680410308db296656eba189fbb548f9bdf7ce012e97dac30b136
- SSDEEP 384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOwMf:uZ4FLz8ae+rOn8ae+rO3
- MD5 SHA1 SHA512 SSDEEP
- Path C:\967f022c4c136664abfad56c1fb73a\2010_x86.log.html.tmp
- Size 99KB
- SHA256 30d9c9fc062cc40b9b67382b476f7dca9c73ac369eb35ba8542af9fcf6a886d6
- MD5 aa48418e243404c96adade45c61b9f4b
- SHA1 67bc898ba908868569b4ac9ccbefb405b6bad2b6
- SHA512 91961de5c92d6b6850bc2ccb8df29888b5a2dee00a8a129f4d8cde64ce7c37d8e70ecaa7732e4b15c3295328a2df86a669cf3772142f5054424b2f9eb14fd496
- SSDEEP 768:uZ4FLz8ae+rOn8ae+rOPVyw7oDo1yFHpgHtKwDlI:uGIIlos1yFHpgHtKwi
- MD5 SHA1 SHA512 SSDEEP