Analysis
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max time kernel
149s -
max time network
102s -
platform
windows11-21h2_x64 -
resource
win11-20250502-en -
resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system -
submitted
29/05/2025, 11:58
Behavioral task
behavioral1
Sample
31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
Resource
win11-20250502-en
General
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Target
31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
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Size
79KB
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MD5
6a43f3c8567cca14b422a3fe1b3b5a07
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SHA1
a16d10ded5e5cb3781c6f066db83370603b986b7
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SHA256
31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a
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SHA512
40523062a4ccee23e61724967aa1139723ed3dc75ec97c9da9431fb77c82665d52aaad97f0dc4b5d87bbc0d7e219d2ddc90628e738ed1f7b6dd534da7774fc12
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SSDEEP
768:s7BlpppARFbhdLz8ae+rOn8ae+rOoJhiJhYueGJhzAEaSXmlOT:s7ZppApdIIoJhiJhYueBFJlOT
Malware Config
Signatures
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Cosmu family
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Detects Cosmu payload 2 IoCs
Cosmu is a worm written in C++.
resource yara_rule behavioral2/files/0x000d00000002ad1e-1.dat family_cosmu behavioral2/files/0x00040000000270e5-5.dat family_cosmu -
Renames multiple (5202) 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.Xml.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Collections.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_MAK-ul-phn.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ppd.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_Retail-ul-oob.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Grace-ppd.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_COL.HXC.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\System\msadc\it-IT\msadcer.dll.mui.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.Debug.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\Microsoft.VisualBasic.Forms.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\UIAutomationTypes.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019VL_MAK_AE-ul-oob.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Trial-ppd.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProDemoR_BypassTrial180-ul-oob.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\MSOHEVI.DLL.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy\messages_zh_CN.properties.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-runtime-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\MicrosoftDataStreamerforExcel.dll.manifest.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\JitV.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Queryable.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial5-ppd.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ru-ru.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\System\en-US\wab32res.dll.mui.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\WindowsBase.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaTypewriterBold.ttf.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RInt.16.msi.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_OEM_Perp-pl.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_WHATSNEW.XML.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-time-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Runtime.Serialization.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Design.Editors.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-time-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Client\msvcp140.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\fre\StartMenu_Win8_RTL.mp4.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_KMS_Client-ul-oob.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-heap-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main.xml.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Linq.Parallel.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-00E1-0000-1000-0000000FF1CE.xml.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-pl.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART14.BDR.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\SAMPLES\SOLVSAMP.XLS.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.Concurrent.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\System.Windows.Input.Manipulations.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\j2pcsc.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-crt-utility-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp-ul-oob.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLV.DOC.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\vcruntime140_cor3.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-core-processthreads-l1-1-1.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Client\msvcp120.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_Subscription-pl.xrm-ms.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Runtime.Serialization.Json.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Forms.Primitives.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\UIAutomationTypes.resources.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-multibyte-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jre-1.8\lib\ext\sunec.jar.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogoSmall.contrast-white_scale-80.png.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\microsoft shared\ink\uk-UA\TabTip.exe.mui.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\tnameserv.exe.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Common Files\microsoft shared\ink\ipschs.xml.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-stdio-l1-1-0.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe File created C:\Program Files\Java\jre-1.8\bin\eula.dll.tmp 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.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 31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe"C:\Users\Admin\AppData\Local\Temp\31219bb50eca7514d0043992615702d4beef2ded95f668edaca1e8a92905208a.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:5600
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
79KB
MD5969fa20818599dc74aa596c0f4b46837
SHA13c6e37a3b5d5d1f4ddf1014dcd29de364038ff4b
SHA256382b25162e4804b2ae3bbccb59d092b529d57d24120fcd332f8a8cadf357b8ba
SHA51211e03255dc209165715a0a368872db6ef2f4dc6b4c9c77ce0b37f7a1b2a8cfabcac8d8d8a4396080e3dfa373b51b3218fc5c4704f789cd61bd3f9e2562bf444f
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Filesize
159KB
MD546e92cf454fdc4102242ed02aafdf0f9
SHA14abff0bffb6be64c5007e5c529b3089e9fd5c1eb
SHA2569bb9823154c99af973776929db7ea63cb89adb4303d30ec6be29552b46902bc3
SHA512f6cb6282da44e6993d64f8e2f5e23233e5973338e9d33d3f0c62540af7aae59cd3f8c3844a898b91b28d205f792a5e70289b716b91b5433aeb444b25bfa3d55b