Analysis
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max time kernel
150s -
max time network
102s -
platform
windows11-21h2_x64 -
resource
win11-20250619-en -
resource tags
arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system -
submitted
03/07/2025, 05:26
Static task
static1
Behavioral task
behavioral1
Sample
734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe
Resource
win10v2004-20250619-en
Behavioral task
behavioral2
Sample
734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe
Resource
win11-20250619-en
General
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Target
734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe
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Size
2.6MB
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MD5
d232a5e0b7a6b57f0b26dc70b7d7e298
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SHA1
f7e4f532a61a724bac2b35e7b78362c930993295
-
SHA256
734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100
-
SHA512
15d436a8e08f3d575370f843235c395fd255d300bd8ae46a956a714dfa50aafacbbc5c8261802176ae3222912c5ecd4d70f04252b546fadae2ab6a53bd3e5776
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SSDEEP
49152:6LoHPM9JQtDw+M4AzO0sE722MumIoZgSj4RQK:2oHPM9K9w+M4AzDsE7dMj4RQK
Malware Config
Signatures
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Cosmu family
-
Detects Cosmu payload 1 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral2/memory/5520-241-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (1254) 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\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.WebProxy.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\System.Windows.Forms.Design.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\ReachFramework.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\ado\msado60.tlb.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\D3DCompiler_47_cor3.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\ku.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Cryptography.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\osknav\osknavbase.xml.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\Ole DB\msdasql.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.Process.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Serialization.Primitives.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Numerics.Vectors.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Resources.Writer.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Controls.Ribbon.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\br.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\ug.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.FileSystem.AccessControl.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\System.Windows.Forms.Primitives.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\UIAutomationClientSideProviders.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Xaml.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\microsoft shared\ink\es-ES\mshwLatin.dll.mui.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Memory.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\clretwrc.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\UIAutomationTypes.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\ro.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\Ole DB\ja-JP\msdasqlr.dll.mui.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.NameResolution.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Loader.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\UIAutomationClient.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\System.Windows.Input.Manipulations.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Forms.Primitives.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Windows.Input.Manipulations.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\en.ttt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\ga.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Serialization.Xml.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Quic.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\System.Windows.Forms.Design.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\WindowsBase.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOLoaderUI.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.DispatchProxy.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Input.Manipulations.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\UIAutomationClient.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\microsoft shared\ink\es-ES\InputPersonalization.exe.mui.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\microsoft shared\ink\id-ID\tipresx.dll.mui.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\msadc\ja-JP\msaddsr.dll.mui.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\Ole DB\msdaps.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Dynamic.Runtime.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\System.Windows.Forms.Primitives.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\System.Windows.Forms.Primitives.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\Ole DB\msdatl3.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\LICENSE.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-errorhandling-l1-1-0.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-multibyte-l1-1-0.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Compression.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Extensions.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\Microsoft.Win32.Registry.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.Tasks.Extensions.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\7-Zip\Lang\tr.txt.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\Common Files\System\ado\msadox.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\Microsoft.Win32.Registry.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.FileSystem.Primitives.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Accessibility.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\System.Windows.Input.Manipulations.resources.dll.tmp 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.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 734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe"C:\Users\Admin\AppData\Local\Temp\734547048714965a108464aa5a4a1b3af1fed4243bc5d0c68e8e3a2258682100.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:5520
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
2.6MB
MD508e447a906cfed771b04fc118a6923a2
SHA158e7697cccd1131b7ad930746df8ee581cd920dd
SHA256a678739fe052917df4f4ad12f9c879053cae85b77ddd6f549be97776741843cb
SHA512bcca4d387d6eebba8feec795c42e8d32fc2f4730a244d9159576d70cd667e357c5e624fa615cf7f5841efb09d29e6cc643fa4a962f332ee703e6ba61eacdadbf
-
Filesize
2.6MB
MD5c8f052cc9ce813468607dd5633b81613
SHA11e4a6e8c854f1a02b9d737e405c71a7462ffab72
SHA256b6ab2a23ecb6d677417878a13619cc5b4f5a55c7d21be3d91ed6b7a356889921
SHA512854545c03ea16a999df57f4963fa1e825a507c30bc047dd67a9b3b9ef4a7ffdf059227d0f97ac59e0e32588b92ebb6d185cde02e9756a8ff27f3f51b540a7e6a