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, 07:23
Behavioral task
behavioral1
Sample
da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe
Resource
win10v2004-20250502-en
General
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Target
da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe
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Size
99KB
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MD5
2a613767e1bb05dc94ad3cb216e2c243
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SHA1
4a75bf8843c50508b890983cdb011a937cb28f6c
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SHA256
da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5
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SHA512
44df6dd3c06c50c7db8a8513a6fc77b784c05ba0100f4ecfcaf01d64720db0cb5e87425113322cdc6f5de2d5a95e9c0a5fa4feefed065cc92b41b83b78cb568d
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SSDEEP
1536:s7ZppApdIIyBoLqrNkW1zN0m0lG1tETSA6P:spWpsBsqrNkMzN0mx7Sr6P
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 behavioral1/files/0x00060000000236f9-1.dat family_cosmu behavioral1/files/0x000400000001eea5-5.dat family_cosmu -
Renames multiple (4951) 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\MEDIA\VOLTAGE.WAV.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL011.XML.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ReachFramework.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pidgenx.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Security.Cryptography.Pkcs.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.DataIntegration.FuzzyMatchingCommon.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\th\msipc.dll.mui.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.Formatters.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\System.Windows.Forms.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\System.Xaml.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Glow Edge.eftx.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-ul-oob.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Retail-pl.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\linesdistinctive.dotx.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\FirstRunLogo.contrast-black_scale-140.png.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\microsoft shared\ink\es-ES\TipRes.dll.mui.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\System\ado\msado28.tlb.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\PresentationFramework.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\System.Windows.Forms.Primitives.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\jp2launcher.exe.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0409-1000-0000000FF1CE.xml.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProMSDNR_Retail-ul-phn.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.pl-pl.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Core.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\DirectWriteForwarder.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_OEM_Perp-pl.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProDemoR_BypassTrial180-ppd.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Cartridges\sql120.xsl.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\System\ado\en-US\msader15.dll.mui.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-process-l1-1-0.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_OEM_Perp-ppd.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_O16EnterpriseVL_Bypass30-ppd.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\OFFSYML.TTF.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\7-Zip\Lang\mr.txt.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Sockets.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\UIAutomationProvider.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-synch-l1-2-0.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Blue Warm.xml.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\GRAPH_F_COL.HXK.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_OEM_Perp-pl.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\ODBC Drivers\Salesforce\lib\1033\SQLENGINEMESSAGES.XML.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Office16\OneNote\prnSendToOneNote.cat.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Loader.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\Microsoft.VisualBasic.Forms.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\tr\UIAutomationTypes.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Java\jdk-1.8\legal\javafx\libxslt.md.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\7-Zip\Lang\io.txt.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\7-Zip\Lang\is.txt.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ComponentModel.DataAnnotations.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.Sockets.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Forms.Primitives.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\System.Windows.Forms.Design.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\UIAutomationProvider.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\UIAutomationClientSideProviders.resources.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.hi-in.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Principal.Windows.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Diagnostics.EventLog.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\D3DCompiler_47_cor3.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework.Royale.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Java\jre-1.8\lib\cmm\sRGB.pf.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\vk_swiftshader_icd.json.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Trial-pl.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Java\jre-1.8\bin\dt_socket.dll.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Retail-pl.xrm-ms.tmp da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.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 da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe"C:\Users\Admin\AppData\Local\Temp\da3aac9e5bbabfadd5fcfa5169dc151e4be023f88c8f39260cfda6284a0b9ce5.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4740
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
99KB
MD5ca0e61703cc64da43fc0c4ba7c03ef4e
SHA1c73ec86751cc10b153ea2075f4959e5d8f5a8b70
SHA256437d55313af7a9f38109cd899fbab1e44ef2b76b2ddf2b82dd389d250e00be50
SHA512cfd1cc53ce80ffd00225daf606c663558c2026b47df7ccfc5cacea183aea3e8e31abeda602786c06fc5e0f808538c78d6a858230407f3b0f6e45ad26b4080723
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Filesize
184KB
MD5e112c8ad0fa9e3fb859191c3977a964e
SHA16c934a05256e78457940cb6e3c01e81d3a7438ac
SHA2568957985095f3cde55c05132547c5c0535e78a9d30f2f75df043eb81d64d07c79
SHA512c750515b49e78665847eb64e6bd5c226d52c5ea41e578ce9c5f82168e19568b3241925b705e3f7f7e2df3eef0b26076ad8e742107cb579db39f9b2a6f95ce6cc