Analysis Overview
SHA256
684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130
Threat Level: Known bad
The file 684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130 was found to be: Known bad.
Malicious Activity Summary
Cosmu family
Detects Cosmu payload
Cosmu
Renames multiple (5277) 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
Cosmu family
Detects Cosmu payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
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
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 |
| N/A | N/A | N/A | N/A |
Renames multiple (5277) files with added filename extension
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\System.Windows.Forms.Primitives.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Median.xml.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Century Schoolbook.xml.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\System\msadc\es-ES\msadcer.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\System\Ole DB\es-ES\sqloledb.rll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\PresentationFramework.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\eventlog_provider.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\deploy\messages_zh_HK.properties.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\management\jmxremote.access.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoR_ViewOnly_ZeroGrace-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\io.txt.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\System\msadc\es-ES\msadcor.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ServiceProcess.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Extensions.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.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\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\deploy\messages_fr.properties.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Trial-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\LyncVDI_Eula.txt.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\mshwgst.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Numerics.Vectors.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\vcruntime140_1.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\meta-index.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\legal\javafx\libxml2.md.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Integration\C2RManifest.OneNote.OneNote.x-none.msi.16.x-none.xml.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Retail-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\ja-JP\ShapeCollector.exe.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\Microsoft.NETCore.App.runtimeconfig.json.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\AccessR_OEM_Perp-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\POWERPNT_K_COL.HXK.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.PPT.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Client.Packaging.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOLoader.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PenImc_cor3.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-locale-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial2-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Grace-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Word2019R_Retail-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.Reporting.AdHoc.Shell.Bootstrapper.xap.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN107.XML.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\de-DE\tabskb.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\hwrdeslm.dat.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\Microsoft.VisualBasic.Forms.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\WindowsBase.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Trial-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_Retail-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_Subscription-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\es\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\az.txt.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVPolicy.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\SEQCHK10.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\Fonts\private\REFSPCL.TTF.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\ext\sunpkcs11.jar.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\Bibliography\Sort\TAG.XSL.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\PresentationUI.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Inset.eftx.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial3-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\rsod\office32ww.msi.16.x-none.boot.tree.dat.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\nslist.hxl.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\es-ES\TipRes.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Http.Json.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\WindowsBase.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-processenvironment-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.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\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.exe
"C:\Users\Admin\AppData\Local\Temp\684b848e80e4c95ecb7f2b390d64cc8564219ff506492d64a5d82af7eb911130.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:\$Recycle.Bin\S-1-5-21-3690492401-2005096563-3427069815-1000\desktop.ini.tmp
| MD5 | 156f6fe3dcaded100ed61c18bcbfd4c0 |
| SHA1 | aba5aa452c3050719d86cff9b297e10cefa246a9 |
| SHA256 | e0e005fd3ed44e662ce9a405014450cb14f5d989b7142600025a76bb3100eb92 |
| SHA512 | 5510a67c38764d2574d844b8129a32f6427d2cb8223720d01ff9aba09aa687ab7590bcb08f4b40afbc20be83a01f030514f473e93ebc121bd204c5f5c2221e64 |
C:\f32c6debfbe15d219b06a854\2010_x64.log.html.tmp
| MD5 | d35608ec52edc7a35742e76a96af7b71 |
| SHA1 | 6ab35c6c29fef77e486d561a03ad6c7e81211b7c |
| SHA256 | a46ab5cf5fbf8962a58dfd8920b0af1e7f1df26ef041c6e459ea2bda24ef4863 |
| SHA512 | 2d29d4979372a75d58d72eb0c42bf17d10c2a653d24d2e061d1c0d5e10b2734a7d76ccb7bcd848df3e662533e59e709306c0cb94f2e1ab308e9f84032d84dee8 |