Analysis Overview
SHA256
2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b
Threat Level: Known bad
The file 2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b was found to be: Known bad.
Malicious Activity Summary
Cosmu
Cosmu family
Detects Cosmu payload
Renames multiple (5282) files with added filename extension
Drops file in Program Files directory
System Location Discovery: System Language Discovery
Unsigned PE
MITRE ATT&CK
Enterprise Matrix V16
Analysis: static1
Detonation Overview
Reported
2025-06-05 08:18
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
2025-06-05 08:18
Reported
2025-06-05 08:20
Platform
win10v2004-20250502-en
Max time kernel
150s
Max time network
136s
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 (5282) files with added filename extension
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\mr.pak.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-datetime-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Interop.MSDASC.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\PresentationCore.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\legal\jdk\libpng.md.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTrial-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Excel.Common.FrontEnd.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MEDIA\BOMB.WAV.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Forms.Design.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationFramework.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Cryptography.X509Certificates.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\UIAutomationClientSideProviders.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\currency.data.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\deploy\messages_it.properties.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000042\index.win32.bundle.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.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:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\io.txt.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sk-sk.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\uk-UA\TipTsf.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\Microsoft.Win32.Registry.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Drawing.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.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\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ComponentModel.DataAnnotations.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.StackTrace.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\Microsoft.VisualBasic.Forms.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\el.pak.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-private-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Subscription2-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00A1-0000-1000-0000000FF1CE.xml.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.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\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp3-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\tzdb.dat.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Retail-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Retail-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\sv\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\msoutilstat.etw.man.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\hr.txt.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Resources.Writer.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\System.Xaml.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Grace-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_KMS_Client-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_KMS_ClientC2R-ul.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_WHATSNEW.XML.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\eo.txt.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskclearui\oskclearuibase.xml.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.TraceSource.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Xaml.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\UIAutomationProvider.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\jdeps.exe.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\cmm\sRGB.pf.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_Retail-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\awt.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\Office16\SLERROR.XML.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessEntry2019R_PrepidBypass-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\InstallerMainShell.tlb.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\ug.txt.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\Common Files\System\msadc\es-ES\msdaremr.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-console-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.WebProxy.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\ReachFramework.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.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\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe
"C:\Users\Admin\AppData\Local\Temp\2c78c3893ea41ba6088eeb516ead282222eca18d08fa80b907685c369bd4f16b.exe"
Network
| Country | Destination | Domain | Proto |
| 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-1-5-21-3342576763-1998465526-3870295501-1000\desktop.ini.tmp
| MD5 | 266d2fc19e3cf43a4f93ac58e3cdf479 |
| SHA1 | f7fd1168d4c6baa48bab36f2557f87c19138cc45 |
| SHA256 | fa964d30f09d65bf874fab12436549cee81acb2ce9a2a5c5ca7ab18fe14a557b |
| SHA512 | 67348c1d19e31603de328cc9eba5dcde608b0a8ff5f054e1c5e6e345e99d88c2b017a9aa888bf73e568439cc7e40661df356b805852536891fd098bb25ae8234 |
C:\fa79de221d524b769d0447\2010_x64.log.html.tmp
| MD5 | 666203648e58e533ace1458b053a3f4a |
| SHA1 | f04b7e7030dd5eed4e94abe0d1c7fe137124bf4e |
| SHA256 | a860167b4c56e4ce0c249b20582a91fa106957167b370d232abba28f5ff0ef2a |
| SHA512 | fc45766986094ec786ac965c54fc1721aea10683d5016aad5857c9b47b5e791537214c3272114de231d72a6baab1bf60e4568287e3496bf999a18dcdaa963065 |