Analysis Overview
SHA256
c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5
Threat Level: Known bad
The file c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5 was found to be: Known bad.
Malicious Activity Summary
Cosmu family
Detects Cosmu payload
Cosmu
Renames multiple (5279) 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 07:23
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-06-05 07:23
Reported
2025-06-05 07:25
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 |
Renames multiple (5279) files with added filename extension
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.DocumentServices.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.contrast-white_scale-180.png.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7EN.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.MSOUC.16.1033.hxn.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-interlocked-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\wsdetect.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\ext\cldrdata.jar.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019DemoR_BypassTrial180-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\CLVWINTL.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Templates\1033\RedAndBlackReport.dotx.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\ClientEventLogMessages.man.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN096.XML.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationClient.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\PresentationCore.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\Microsoft.DataStreamer.Excel.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.scale-180.png.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\sv.txt.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\tiptsf.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Metadata.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaBrightItalic.ttf.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial1-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\mscss7fr.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\fr\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebSockets.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Input.Manipulations.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\WindowsBase.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_WHATSNEW.XML.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\WindowsFormsIntegration.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\cmm\GRAY.pf.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Grace-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\SLINTL.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MEDIA\BOMB.WAV.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\rsod\word.x-none.msi.16.x-none.tree.dat.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\UIAutomationTypes.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-libraryloader-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\prism_d3d.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\client_eula.txt.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Spatial.NetFX35.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\WindowsFormsIntegration.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\System.Windows.Forms.Primitives.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_MAK-ul-phn.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_MAK-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PersonaSpy\Office.Runtime.js.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\1033\ACEINTL.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.Linq.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.ReportingServices.ProgressiveProcessing.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Parallel.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\WindowsFormsIntegration.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Windows.Input.Manipulations.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\resource.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\sunmscapi.dll.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Trial-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\NAMECONTROLPROXY.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL012.XML.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft\OFFICE\MySharePoints.ico.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Common Files\System\Ole DB\it-IT\oledb32r.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\javacpl.exe.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\legal\jdk\xerces.md.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Subscription-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.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\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe
"C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.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-1-5-21-3920234085-916416549-2700794571-1000\desktop.ini.tmp
| MD5 | 851600b7e1bfc09270f44393dd091eb7 |
| SHA1 | d65f6edf46fe876c9d37f633dc8b0b4b1ceaa334 |
| SHA256 | 536e3017fb0d6a34277c1afa102951524b8e9cec2c09f69385e695480b8c63c3 |
| SHA512 | 2dd373084076bf6a36370b6547e074f3af4876f0fcb97794bde73e626b465b68fd50060a396912c5429eee777edad905a8c29f18813121ff6e0cfb9c2b7db6f0 |
C:\6eaadd5e1536cd09900c16de307910\2010_x86.log.html.tmp
| MD5 | bde2d88e188dda6d0435c4aebd173125 |
| SHA1 | b5301ee0eda807882c2a85208e2ad32766680b71 |
| SHA256 | 7a0a8593c1649be9387904c67f655f92122fd95f9abea612c0efd1883c6520ce |
| SHA512 | cc67526074d607b5218365b69de5a6c177e3403fb615764e4311a136fda594fefcb48f7ec9df5d0a4b7f16a67f872de5cf5fc1934d237d7c1775268296837b20 |
memory/4920-803-0x0000000000400000-0x0000000000407000-memory.dmp