Analysis
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max time kernel
150s -
max time network
103s -
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
05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe
Resource
win10v2004-20250619-en
Behavioral task
behavioral2
Sample
05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe
Resource
win11-20250619-en
General
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Target
05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe
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Size
276KB
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MD5
82393db8e99c15a391c5be37af988267
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SHA1
2105ab908b23e88901e56ffaef98ec75716b3e5e
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SHA256
05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983
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SHA512
5afecc4357747729ae39cfb180f6c84cf06b04cc4af7c5378cc6902f1ce7496bb804b232222854cec65c923b629f8d62dae3a2da4fab6046b600a01de6b3b563
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SSDEEP
6144:g3P3Wg9pU+xWkDr468eIDFx1xJsktJ/PHqC:t+//eeyx1
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/5560-825-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (4696) 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.WindowsDesktop.App\6.0.27\ko\System.Windows.Forms.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationFramework.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\bin\idlj.exe.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Trial-pl.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_OEM_Perp-ul-phn.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\ink\ar-SA\tipresx.dll.mui.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ComponentModel.Annotations.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.Compression.Brotli.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Http.Json.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Private.CoreLib.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-environment-l1-1-0.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\MSOUC_K_COL.HXK.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\UIAutomationClient.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\jpeg.md.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\INTLDATE.DLL.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ja-jp.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\UIAutomationClientSideProviders.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\Microsoft.VisualBasic.Forms.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\glib-lite.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019VL_KMS_Client_AE-ppd.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\XLSLICER.DLL.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ko\PresentationUI.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdVL_KMS_Client-ul-oob.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Claims.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Input.Manipulations.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-heap-l1-1-0.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jre-1.8\release.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Trial-ppd.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\7-Zip\Lang\id.txt.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\MSInfo\en-US\msinfo32.exe.mui.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\System\Ole DB\es-ES\oledb32r.dll.mui.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Linq.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\PresentationFramework.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\Microsoft.VisualBasic.Forms.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RIntLoc.en-us.16.msi.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_PrepidBypass-ul-oob.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.FileVersionInfo.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Web.HttpUtility.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ul-phn.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_KMS_Client-ppd.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.scale-100.png.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\System.Windows.Forms.Primitives.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest5-pl.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.pt-br.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\PresentationCore.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\System.Xaml.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Retail-ul-oob.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Storage.XmlSerializers.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\BI-Report.png.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\ink\ipshi.xml.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\System.Windows.Controls.Ribbon.resources.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\pl.pak.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\lcms.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_Retail-ul-oob.xrm-ms.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-datetime-l1-1-0.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Requests.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\fil.pak.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\server\Xusage.txt.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy.jar.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\freebxml.md.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\LibCurl64.DllA\OpenSSL64.DllA\openssl64.dlla.manifest.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Microsoft Office\root\Office16\OFFRHD.DLL.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-conio-l1-1-0.dll.tmp 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.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 05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe"C:\Users\Admin\AppData\Local\Temp\05883a6b3b770d06f9bfbac1145cfe5107ce748842dbf15660e56c6b5ab88983.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:5560
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
276KB
MD50032d6ea790e94c29708e2c5a77cf6b8
SHA13652f485080ddab4e4248437f1c2b316a269d155
SHA256eaf80a182872b5bfdadabd777ff8d070b41a895f7f3277692dc225daf19d2500
SHA512189d62e37b20ff3393ad6c06d5049d4a59c37b1c28d070f7a6cca96fe6a018977c81cde9b385fa3dfbafefb741be32620c15720085e3540a222c2a276a410890
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Filesize
362KB
MD5d8eaf551148a3d05680a0fbeb0997e2c
SHA186699be4331c4bf5ef6a6690ea556aaba1fdab8c
SHA256c6f4fc7f1184c8d9f88d80f615d25eed5bdbaadaea3a3801e8c729b2cf08d9b7
SHA512ace500063b2a949f3d6a84aab48fcf0f10956b880aaeec299edf9794cc841711985538205836e5e3fd135ca2d9630a3c497bda712095c4b5ce441dede41e2bd1