Analysis
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max time kernel
150s -
max time network
136s -
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, 07:23
Static task
static1
Behavioral task
behavioral1
Sample
c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe
Resource
win10v2004-20250502-en
General
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Target
c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe
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Size
21KB
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MD5
830487fd2d04c1c799597213fc60ce0c
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SHA1
7bee89bbcb3e8615ffadb7453d62c9f9c2806658
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SHA256
c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5
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SHA512
df0ea654b6a49e10940fe7b24e9121b23dee59daaeb56e9d2aecf0d27306a2fdb439ee6cb211608afc2b949150418222f15147a1116da0135a22e485526a321f
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOb84sAsvosGOUiuJtfosGOUiuJtvqj:uZ4FLz8ae+rOn8ae+rOb83osGOUiuJtR
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/4920-803-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5279) 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\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.DocumentServices.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.contrast-white_scale-180.png.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7EN.DLL.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft Help\MS.MSOUC.16.1033.hxn.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-interlocked-l1-1-0.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\bin\wsdetect.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\lib\ext\cldrdata.jar.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019DemoR_BypassTrial180-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\CLVWINTL.DLL.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\RedAndBlackReport.dotx.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\ClientEventLogMessages.man.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN096.XML.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationClient.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\PresentationCore.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\Microsoft.DataStreamer.Excel.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogo.scale-180.png.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\7-Zip\Lang\sv.txt.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Common Files\microsoft shared\ink\tiptsf.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Metadata.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaBrightItalic.ttf.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial1-ul-oob.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\mscss7fr.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\fr\msipc.dll.mui.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebSockets.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Input.Manipulations.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\WindowsBase.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_WHATSNEW.XML.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\WindowsFormsIntegration.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\cmm\GRAY.pf.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Grace-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\SLINTL.DLL.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\BOMB.WAV.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\rsod\word.x-none.msi.16.x-none.tree.dat.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\UIAutomationTypes.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-libraryloader-l1-1-0.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\bin\prism_d3d.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\client_eula.txt.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Spatial.NetFX35.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\WindowsFormsIntegration.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\javaw.exe.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ul-oob.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\pt\msipc.dll.mui.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\System.Windows.Forms.Primitives.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_MAK-ul-phn.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_MAK-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\PersonaSpy\Office.Runtime.js.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\vfs\ProgramFilesCommonX64\Microsoft Shared\OFFICE16\1033\ACEINTL.DLL.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.Linq.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.ReportingServices.ProgressiveProcessing.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.Parallel.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\WindowsFormsIntegration.resources.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Windows.Input.Manipulations.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\resource.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\sunmscapi.dll.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Trial-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\NAMECONTROLPROXY.DLL.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL012.XML.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft\OFFICE\MySharePoints.ico.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Common Files\System\Ole DB\it-IT\oledb32r.dll.mui.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\bin\javacpl.exe.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\xerces.md.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Subscription-ppd.xrm-ms.tmp c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe 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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 c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe"C:\Users\Admin\AppData\Local\Temp\c39252cb773fd7294adb831abe346b1549a6e9bd8da7cc942479e16b92ade8b5.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4920
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
22KB
MD5851600b7e1bfc09270f44393dd091eb7
SHA1d65f6edf46fe876c9d37f633dc8b0b4b1ceaa334
SHA256536e3017fb0d6a34277c1afa102951524b8e9cec2c09f69385e695480b8c63c3
SHA5122dd373084076bf6a36370b6547e074f3af4876f0fcb97794bde73e626b465b68fd50060a396912c5429eee777edad905a8c29f18813121ff6e0cfb9c2b7db6f0
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Filesize
103KB
MD5bde2d88e188dda6d0435c4aebd173125
SHA1b5301ee0eda807882c2a85208e2ad32766680b71
SHA2567a0a8593c1649be9387904c67f655f92122fd95f9abea612c0efd1883c6520ce
SHA512cc67526074d607b5218365b69de5a6c177e3403fb615764e4311a136fda594fefcb48f7ec9df5d0a4b7f16a67f872de5cf5fc1934d237d7c1775268296837b20