Analysis Overview
SHA256
4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788
Threat Level: Known bad
The file 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788 was found to be: Known bad.
Malicious Activity Summary
Cosmu
Cosmu family
Detects Cosmu payload
Renames multiple (5208) files with added filename extension
Drops file in Program Files directory
Unsigned PE
System Location Discovery: System Language Discovery
MITRE ATT&CK
Enterprise Matrix V16
Analysis: static1
Detonation Overview
Reported
2025-05-29 11:59
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-05-29 11:59
Reported
2025-05-29 12:01
Platform
win10v2004-20250502-en
Max time kernel
149s
Max time network
134s
Command Line
Signatures
Cosmu
Cosmu family
Detects Cosmu payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (5208) files with added filename extension
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.WINWORD.16.1033.hxn.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Xaml.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\OFFSYMSL.TTF.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Formats.Tar.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\keytool.exe.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\vcruntime140.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\AccessR_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\7-Zip\License.txt.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.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:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunec.jar.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoR_ViewOnly_ZeroGrace-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription3-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Thread.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\prism_d3d.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\en-US\tabskb.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-phn.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Cryptography.OpenSsl.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationProvider.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\plugin2\msvcp140.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019VL_MAK_AE-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Security.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\PresentationCore.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\System.Windows.Forms.Design.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\chrome.VisualElementsManifest.xml.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\include\win32\jawt_md.h.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\sspi_bridge.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\msvcp140.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\Office16\OSPP.VBS.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\UIAutomationTypes.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\legal\jdk\giflib.md.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Retail-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\WordR_Retail-ul-phn.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.exe.config.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.contrast-white_scale-180.png.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\msipc.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PowerPointInterProviderRanker.bin.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\attach.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\legal\javafx\public_suffix.md.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\JitV.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\msvcp120.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\tr-TR\tipresx.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\mscorrc.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.DataAnnotations.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\sr-Cyrl-BA\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\sv\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\index.win32.bundle.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsBase.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\PresentationCore.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Dynamic.Runtime.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\UIAutomationProvider.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\chrome_pwa_launcher.exe.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\HintBarEllipses.16.White.png.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvStreamingManager.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Xaml.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\WindowsFormsIntegration.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.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\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe
"C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.27.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | 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:\$Recycle.Bin\S-1-5-21-1153236273-2212388449-1493869963-1000\desktop.ini.tmp
| MD5 | 26235591df534765a82d2bb665a00b60 |
| SHA1 | fc3dd307530346df42d86d91dcb6c817d590bd78 |
| SHA256 | db78dd80518b347d43f365efa44af8d387561e4666f5eea6eecf75084b4aa25b |
| SHA512 | af75a3755c8962ca7b321c4efc6289002321d4652e277421d6636e158246c5101286986f985830f0eef7edfe84551b74e44683b2c2ea3a59a223712a134040d6 |
C:\f518c2ae32873fab6fcffcc19027\2010_x64.log.html.tmp
| MD5 | 5ad3f6e275d9f23ff8892f372efa0ad4 |
| SHA1 | 6a4366e96a45a2e323f49bbae3e7fd4b4d638d79 |
| SHA256 | 615146c8c02d3ccfc58a8017e0428d31b66d2ac9d09c719b535cabf76ba0ee2f |
| SHA512 | e36995ddd25534920418a7ad8d9cdcd007dbfdee38cb59f223abcbe36c0a2b386d02606f5aa86165763d15c8aec0e39e6b2aa9116325103849c49cf5e1f19837 |
memory/2896-809-0x0000000000400000-0x0000000000407000-memory.dmp