Analysis
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max time kernel
150s -
max time network
139s -
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, 08:15
Static task
static1
Behavioral task
behavioral1
Sample
c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe
Resource
win11-20250502-en
General
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Target
c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe
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Size
24KB
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MD5
cd3f0a72b25ff0c8433d823d6bb6bfa8
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SHA1
692da6dfe5594c29394ef862b7a90c9db3a6c2a7
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SHA256
c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567
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SHA512
dfd9bbf1da81e3d7ef2f06915172ba869d7a9ffcd5a535ea7e8b5d7445a8d07ccff5a718adf9983a9a42570227dc4d7d4ac03484770f4086195a95b6d4d4ea08
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOIW2JhuC2JhuOxAxovAJOSAJOR:uZ4FLz8ae+rOn8ae+rOoJhiJh3AJLAJs
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 behavioral1/memory/3604-807-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5294) 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\Licenses16\Professional2019R_Trial-ul-oob.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\CalibriLI.ttf.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Quic.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jre-1.8\lib\deploy\messages_zh_HK.properties.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\MSYUBIN7.DLL.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\LibCurl64.DllA\OpenSSL64.DllA\openssl64.dlla.manifest.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-localization-l1-2-0.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework.Royale.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Internet Explorer\ja-JP\iexplore.exe.mui.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\POWERPNT_K_COL.HXK.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sl\msipc.dll.mui.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL093.XML.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\7-Zip\Lang\ca.txt.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.lt-lt.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Common Files\System\Ole DB\oledb32.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\colorimaging.md.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTest2-pl.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019VL_KMS_Client_AE-ppd.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART10.BDR.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\EQUATION\api-ms-win-crt-convert-l1-1-0.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Cryptography.Cng.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Emit.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ru\System.Xaml.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\VisualElements\Logo.png.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription1-pl.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\MSO0127.ACL.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\7-Zip\Lang\kk.txt.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Web.HttpUtility.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jre-1.8\release.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_Subscription-ul-oob.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.exe.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe.manifest.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\JUICE___.TTF.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\PresentationUI.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Common Files\System\Ole DB\msxactps.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationTypes.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\D3DCompiler_47_cor3.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-libraryloader-l1-1-0.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\SkypeSrv\SKYPESERVER.EXE.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ul-phn.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Data.OData.Query.NetFX35.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\OneNote\prnSendToOneNote.cat.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\WindowsBase.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\UIAutomationTypes.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\System.Windows.Forms.Primitives.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\PresentationCore.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\hu.pak.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jre-1.8\lib\currency.data.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Retail-ppd.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\centered.dotx.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ru\UIAutomationTypes.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\otkloadr_x64.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\manifest.xml.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\XLCALL32.DLL.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\rsod\proof.en-us.msi.16.en-us.tree.dat.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jre-1.8\lib\fonts\LucidaTypewriterBold.ttf.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial3-ul-oob.xrm-ms.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\sql90.xsl.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOSYNC.EXE.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Microsoft Office\root\Office16\MSQRY32.EXE.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Text.Encodings.Web.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-file-l1-1-0.dll.tmp c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.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 c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe"C:\Users\Admin\AppData\Local\Temp\c3836316a31a4634f5c54d66fe14d38a8e0b533079ba19f0ff0ae9d5d1f26567.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:3604
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
24KB
MD5b8b1585f1780b126434140353bda7a5c
SHA102851ca17a0d85bd9ff39d92907ff3053a6a6163
SHA2564951bd9557d1e2459c9f8bb3d994eebbd9674bb2a7a683a42181e9f35ee0909e
SHA512f59d9bd02d0832894c8b183762e50428cd8d3343488c3120744f469d39ee68e045370ae06bde2a53ea757c4e22072fc7d2685a2e99741c8be5c5f74b778817c5
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Filesize
105KB
MD57e171def1b4dab9a8dc130ae2aa27c73
SHA1d7475ee7db05e9e0d1d688045cee3222d8643fea
SHA2563aee13d099da089d27e9a5724b13449970b70f70ced7824a7304b61cbdc1c7f9
SHA5120e310096c5e1e3560c891c0286d83a0080cfbf41fe554b2059f5deb9dff7000479505dc36e2bee6fc0e503fc3cf625964cf83e03059924ae714f36e2318f2ede