Analysis Overview
SHA256
21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17
Threat Level: Known bad
The file 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17 was found to be: Known bad.
Malicious Activity Summary
Cosmu
Cosmu family
Detects Cosmu payload
Renames multiple (5036) 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
2025-05-29 10:01
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-05-29 10:01
Reported
2025-05-29 10:04
Platform
win10v2004-20250502-en
Max time kernel
149s
Max time network
138s
Command Line
Signatures
Cosmu
Cosmu family
Detects Cosmu payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (5036) files with added filename extension
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\Microsoft Office\root\Office16\MEDIA\CASHREG.WAV.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\no\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\TextConversionModule.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Dynamic.Runtime.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\ext\sunjce_provider.jar.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Client\msvcp120.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial2-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\System.Web.Mvc.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-white_scale-100.png.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\ApiClient.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\ar\msipc.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.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\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\cy.txt.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\VSTO\vstoee.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-synch-l1-2-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\swidtag\Microsoft Windows Desktop Runtime - 8.0.15 (x64).swidtag.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\it.pak.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Integration\C2RManifest.wordmui.msi.16.en-us.xml.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioProDemoR_BypassTrial180-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.TypeConverter.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Input.Manipulations.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationFramework-SystemData.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\UIAutomationProvider.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\Microsoft.Win32.SystemEvents.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial2-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProPlusDemoR_BypassTrial180-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\sl-SI\tipresx.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\UIAutomationProvider.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-console-l1-2-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-string-l1-1-0.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Trial-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_K_COL.HXK.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.SapBwProvider.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7ES.dub.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\kinit.exe.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\fonts\LucidaTypewriterRegular.ttf.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp2-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Grace-ul-oob.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\NewCommentRTL.White.png.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Extensions.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationUI.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\ReachFramework.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\fontmanager.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Trial-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_MAK-ul-phn.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\OUTLFLTR.DLL.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\Content.xml.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Common Files\System\msadc\ja-JP\msaddsr.dll.mui.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\Microsoft.VisualBasic.Forms.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_Trial-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_OEM_Perp-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Primitives.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription2-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.VisualBasic.Forms.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ppd.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.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\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\7-Zip\Lang\fur.txt.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Retail-pl.xrm-ms.tmp | C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.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\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe
"C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.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 | 150.171.27.10:443 | 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-1-5-21-3342576763-1998465526-3870295501-1000\desktop.ini.tmp
| MD5 | 422541587a88bc79c5d4387c06afd1f2 |
| SHA1 | d897594e6f07393733dafe248f284522a1fe4a1a |
| SHA256 | 1b970e34dd6c1dc77a305ddf4bd42cc245c8c9bee772a88034bde5c640762998 |
| SHA512 | f23e314741607faae40b00b9d8140426ef102e0cb5f835a1c3bfbd815ed4566e05e8c556f3f6bae7d8d2cf04be6067fec585f36a9821eb5dc7afccc4a0ed0882 |
C:\fa79de221d524b769d0447\2010_x64.log.html.tmp
| MD5 | c096d20908483d2f4e8939fad5727d31 |
| SHA1 | bf1cc1764853c8de0532782f6d4baeee9d11cc24 |
| SHA256 | 514bc06a6ecaa803d0ed247c736584accd8f6de5488bf99f5483f3750017d727 |
| SHA512 | c240783ab827c859775134a661c187cfa28f6212306ffbc3856db328da13f56c5090ba3245b2cb81693c97e85c3462177652362cb79b240a8ce02f044b5a00b0 |
memory/2692-797-0x0000000000400000-0x0000000000407000-memory.dmp