Analysis Overview
SHA256
c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a
Threat Level: Known bad
The file c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a was found to be: Known bad.
Malicious Activity Summary
Cosmu
Cosmu family
Detects Cosmu payload
Renames multiple (5273) files with added filename extension
Executes dropped EXE
Drops file in System32 directory
Drops file in Program Files directory
Unsigned PE
System Location Discovery: System Language Discovery
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V16
Analysis: static1
Detonation Overview
Reported
2025-05-29 11:56
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-05-29 11:56
Reported
2025-05-29 11:58
Platform
win10v2004-20250502-en
Max time kernel
150s
Max time network
137s
Command Line
Signatures
Cosmu
Cosmu family
Detects Cosmu payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (5273) files with added filename extension
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\_createdump.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\Zombie.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\Zombie.exe | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\Zombie.exe | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\WindowsBase.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-process-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019VL_MAK_AE-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\mng2.txt.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\ipsjpn.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.FileSystem.Primitives.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Text.Json.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\vcruntime140_cor3.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Client.Initialization.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\VISUALIZATIONGRAPHICS.DLL.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Excel.Common.FrontEnd.XmlSerializers.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\RepoMan.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Subscription4-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7EN.dub.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\System.Windows.Forms.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\PresentationFramework.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\UIAutomationClientSideProviders.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.scale-140.png.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Input.Manipulations.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\javac.exe.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Blue.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.NetFX40.exe.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\pt-PT\tipresx.dll.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Quic.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Configuration.ConfigurationManager.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ul-phn.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\rsod\powerpivot.x-none.msi.16.x-none.boot.tree.dat.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\rsod\proofing.msi.16.en-us.tree.dat.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\lib\dt.jar.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\ext\nashorn.jar.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Access2019VL_MAK_AE-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\api-ms-win-crt-conio-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\en-US\ShapeCollector.exe.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\policytool.exe.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\OWSSUPP.DLL.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\System\Ole DB\oledb32r.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ComponentModel.Primitives.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.exe.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019VL_MAK_AE-pl.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_Trial-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft\OFFICE\Heartbeat\HeartbeatCache.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-locale-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Compression.FileSystem.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\System.Windows.Forms.Design.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\System\msadc\ja-JP\msdaprsr.dll.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Diagnostics.TextWriterTraceListener.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-profile-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\StandardMSDNR_Retail-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\FPA_f14\FA000000014.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Templates\1033\TimelessResume.dotx.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\jfr\default.jfc.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioStdR_Retail-ul-phn.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\security\policy\limited\local_policy.jar.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_Trial-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019XC2RVL_KMS_ClientC2R-ul.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\legal\jdk\icu.md.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-conio-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\images\default\linkedin_ghost_profile.png.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\sdxs.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART3.BDR.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\Zombie.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4868 wrote to memory of 3088 | N/A | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | C:\Users\Admin\AppData\Local\Temp\_createdump.exe |
| PID 4868 wrote to memory of 3088 | N/A | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | C:\Users\Admin\AppData\Local\Temp\_createdump.exe |
| PID 4868 wrote to memory of 3680 | N/A | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | C:\Windows\SysWOW64\Zombie.exe |
| PID 4868 wrote to memory of 3680 | N/A | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | C:\Windows\SysWOW64\Zombie.exe |
| PID 4868 wrote to memory of 3680 | N/A | C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe | C:\Windows\SysWOW64\Zombie.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe
"C:\Users\Admin\AppData\Local\Temp\c866485f17cf458dd576fd1793616d2e517fab50831a146a9c92abd79101dd7a.exe"
C:\Users\Admin\AppData\Local\Temp\_createdump.exe
"_createdump.exe"
C:\Windows\SysWOW64\Zombie.exe
"C:\Windows\system32\Zombie.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.28.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.27.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | c.pki.goog | udp |
| NL | 142.250.27.94:80 | c.pki.goog | tcp |
Files
C:\Windows\SysWOW64\Zombie.exe
| MD5 | fcd15511ba50c6c59efef7a352352329 |
| SHA1 | ef1c38322fb9bdc6ba5f2e10ac2bfc7844ecc8a4 |
| SHA256 | 0d14960e6b013659736bf98f6554b0d0a4891031a92dc8246233f427f64767b6 |
| SHA512 | 11cdb9f20f065494989ee91b19122d42a57a0fdd9e145e637418eb75e889fde809f7adb6e760481d2c7560548f09f0f11931d42aca034f424842a260fe08e1e9 |
C:\Users\Admin\AppData\Local\Temp\_createdump.exe
| MD5 | a05b36f6129223951282f9df776761b1 |
| SHA1 | ec87fa41a670cffa5d77f64366fe109278661f2c |
| SHA256 | 5113e7ae92f3a7aebc7f8e363209866d4d743b06a26c67e0886979a56fd3a10d |
| SHA512 | 38b588b28057994305a3abc37d98770ab7ff905cba6da35e91b2936b99823955fc91b90a23174d53337dd62e320b9bac066b76734bf657de9fad6d37071c70da |
C:\$Recycle.Bin\S-1-5-21-3674642747-2260306818-3009887879-1000\desktop.ini.exe
| MD5 | 3c3fdcaf5b86bec4bb2670ff32a7ee1d |
| SHA1 | 0f72d256a5c28767f88c11f9cc59fa1326e5dd66 |
| SHA256 | bf27f74b0bf6baa60cbbeac2f59af92fa94b04ea9308975d4f0445a74c366449 |
| SHA512 | 8a700829d272f4cb05f537e58afb5c4265d70109118f708cdebbe3b8c3ce15f7a3938cd1f9d87e9857afe2a0d06889f5d22add5a28f8b67ca944e6aa29a601df |
memory/4868-23-0x0000000000400000-0x0000000000407000-memory.dmp