Analysis
-
max time kernel
150s -
max time network
136s -
platform
windows10-2004_x64 -
resource
win10v2004-20250502-en -
resource tags
arch:x64arch:x86image:win10v2004-20250502-enlocale:en-usos:windows10-2004-x64system -
submitted
05/06/2025, 08:14
Static task
static1
Behavioral task
behavioral1
Sample
a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe
Resource
win11-20250502-en
General
-
Target
a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe
-
Size
19KB
-
MD5
e348051170938c799b6303a8141c9299
-
SHA1
eb602bf4bf72e15aed85b31af03e2f0840c69e82
-
SHA256
a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7
-
SHA512
4537f920f6adc2b680b6d298ae6bca4db9d9bb8615e0b65ed63c6c1a4453d560d28bc6294b63d4b2862431d167a5ca6f0b6c27ae42d0f430c275e84b785c0fdd
-
SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOiOZ2OZofTlCGrlCGT:uZ4FLz8ae+rOn8ae+rOkkGUGT
Malware Config
Signatures
-
Cosmu family
-
Detects Cosmu payload 1 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral1/memory/1724-811-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5278) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Forms.Primitives.resources.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\jp2launcher.exe.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Grace-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_Subscription-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\System\Ole DB\oledb32.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\PowerPivotExcelClientAddIn.tlb.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\EXPLODE.WAV.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\msoasb.exe.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems64.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Transactions.Local.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\icudtl.dat.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jre-1.8\bin\jfr.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Grace-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ul-oob.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\7-Zip\Lang\nn.txt.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.WebSockets.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Security.Cryptography.ProtectedData.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-3101-0000-1000-0000000FF1CE.xml.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Grace-ul-oob.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Subscription-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Trial-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProVL_MAK-pl.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Core.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProMSDNR_Retail-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_Retail-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\ClassicPhotoAlbum.potx.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\DESIGNER\MSADDNDR.OLB.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Timer.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-time-l1-1-0.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.XPath.XDocument.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.dcfmui.msi.16.en-us.xml.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.OSM.OSM.x-none.msi.16.x-none.xml.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework.Royale.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-string-l1-1-0.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jre-1.8\lib\deploy\messages_ja.properties.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\vccorlib140.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\ink\Microsoft.Ink.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pkeyconfig-office.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jre-1.8\bin\prism_common.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessRuntimeR_PrepidBypass-ul-oob.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial3-pl.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_OEM_Perp4-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_Retail-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Grace-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.tr-tr.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\System\msadc\en-US\msadcer.dll.mui.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.Compression.ZipFile.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001B-0000-1000-0000000FF1CE.xml.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ul-oob.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\CAMERA.WAV.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\en-us\msipc.dll.mui.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\msix.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.FileVersionInfo.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Windows.Forms.Design.resources.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\System.Windows.Forms.resources.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationFramework.resources.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Java\jre-1.8\lib\images\cursors\win32_MoveDrop32x32.gif.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Marquee.xml.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusEDUR_SubTrial-ppd.xrm-ms.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\Common Files\microsoft shared\MSInfo\msinfo32.exe.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Tasks.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ValueTuple.dll.tmp a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe -
System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe"C:\Users\Admin\AppData\Local\Temp\a640baf1ea4f1fc120e9ba9c8d714762d42c01bac7d3587f53b66e7e64d22bc7.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1724
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
19KB
MD5d107825fbf1585c7d9035d8ded0a54da
SHA11233fe1585ef946a81167a4cfacf10192ee60cf2
SHA2562ab7da751af72c9a3cbd875c4c4ad4cfb241e6958d16791bc15ea29b6547bf8b
SHA51231a0a363c5ac7eefe4532abd963d8cdb92f8b0317f4e67494e42fb93d701909444094eaab1f36f868eff2482445f0d6beb33d28fa553e79256ef0f9d26e24e20
-
Filesize
105KB
MD5b6697105c2f8430174afd25dcdd78065
SHA12543a008d6e8f9c7e11ce9bcb88507c296c92b2d
SHA2568cee86eb34cdba12075384afe91be9caa47270096e43e692977ed605d18b7d5d
SHA51211de5b781b25efe9734f90aed8201100280abcd49028474496f74e0d68886fe2173ef0e3112d6d6f9beed2c8c3b89ce18bdb79d3dd85522114aeaad768039737