Analysis
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max time kernel
150s -
max time network
103s -
platform
windows11-21h2_x64 -
resource
win11-20250502-en -
resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system -
submitted
05/06/2025, 07:27
Static task
static1
Behavioral task
behavioral1
Sample
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Resource
win11-20250502-en
General
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Target
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
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Size
23KB
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MD5
3e685475a7d2b2289c7b3e4468b2f40c
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SHA1
f1288cfbf64ef40c84caaa94ddae58b9921d97c1
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SHA256
3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4
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SHA512
a3ccfe3d37a257b69288df9a50a144ff2bd47f3c77cfa50fcb519650a71b7f47084e14271762a10a11bddec8703d8b4beaaff8bd9d60a6684ad0d98c6891ed5e
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOr9NNV5H/V36abQD9e0qQD9e0Z:uZ4FLz8ae+rOn8ae+rO2asM0RM0Z
Malware Config
Signatures
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Cosmu family
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Detects Cosmu payload 1 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral2/memory/1460-1237-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5376) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Drops file in Program Files directory 64 IoCs
description ioc Process File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\DataModel\Microsoft.AnalysisServices.Common.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\auxpad.xml.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\System\Ole DB\fr-FR\oledb32r.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Printing.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\WindowsBase.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\plugin2\msvcp140.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial4-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_Subscription-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\relaxngdatatype.md.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_OEM_Perp-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019VL_MAK_AE-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7EN.LEX.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\PresentationCore.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\PresentationUI.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hans\System.Xaml.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-conio-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\javaws.exe.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-processthreads-l1-1-1.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_OEM_Perp-ul-phn.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationUI.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-string-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp2-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msgr8es.dub.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\System\Ole DB\de-DE\sqloledb.rll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-utility-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\UIAutomationTypes.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\PresentationCore.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\rsod\excelmui.msi.16.en-us.tree.dat.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\microsoft shared\ink\InkDiv.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.WebProxy.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Grace-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_SubTrial-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdXC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\id\msipc.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\System\Ole DB\en-US\oledb32r.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\WindowsBase.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-synch-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.SecureString.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Xaml.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Input.Manipulations.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProXC2RVL_KMS_ClientC2R-ul-oob.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\sfodbc_sb64.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\rsod\powerpoint.x-none.msi.16.x-none.tree.dat.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\GRPHFLT\MS.WPG.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\WindowsFormsIntegration.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial1-ppd.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial5-pl.xrm-ms.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\api-ms-win-crt-math-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-filesystem-l1-1-0.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\PresentationFramework.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\ReachFramework.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\cmm\PYCC.pf.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\offsymt.ttf.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt-BR\msipc.dll.mui.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Common Files\System\msadc\msadds.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Diagnostics.Tracing.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Input.Manipulations.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\ru.pak.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\Microsoft Office\root\Office16\URLREDIR.DLL.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Xaml.resources.dll.tmp 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.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 3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe"C:\Users\Admin\AppData\Local\Temp\3dca437f9e491da3d6834290e466b607ab3d6ace9de65a9b8fe7f045394d73a4.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1460
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
23KB
MD53f99688f4ac7887a91459bf1a58ca9d6
SHA19392289d8d77d78830e730dbe47a1693a813a1b6
SHA256d17b6ac8fcecddd2c83c7b650351b4714e400e38a542714a212858a0dc75f3e6
SHA512d5cb6b711eed8858da504657696302160cb1abf140695cfdfbc4680ba406375c0029128870a0fc8c95d87cabc09ff90834faf3ec511d1caa3db8d70b6e310a63
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Filesize
108KB
MD569bf7ef9b55786ae092f9e0d74657902
SHA165a0a82f940a87e0ebb53f3b5dd02af429a953ac
SHA2565490f93b0cc682860385ad0f93d3877c55129eb47b11a7daaf4aa319a6605f63
SHA512020d8ae402d3dc25506c716a197d92b266aada97307fef97632f6ce9cfcb212b47eb26343ac425dcfa3925338c03364210d8ce3680e9725717083f46a3ea77e2