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
29/05/2025, 10:01
Static task
static1
Behavioral task
behavioral1
Sample
2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe
Resource
win10v2004-20250502-en
General
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Target
2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe
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Size
66KB
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MD5
4997db6aa7cc0841cbf7db68a988a30a
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SHA1
265a56f2c18924103be9710d8fc9ac1267988833
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SHA256
2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d
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SHA512
5a4509a0009ecbc477c0ce89f3c009ef2afee4528066a21416d66c647a21d3af215a8ec9331ddec891e08f43ebadcdb2fb9cc3e860eda1d4d7727c5445deb5e0
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOIW2JhuC2JhuOxAxoraygJmMvJvq:uZ4FLz8ae+rOn8ae+rOoJhiJhY+
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/5464-795-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5160) 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\6.0.27\System.Numerics.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Intrinsics.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Design.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.ReportingServices.Diagnostics.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\UIAutomationClient.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Security.Cryptography.Pkcs.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-heap-l1-1-0.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_MAK-ul-oob.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\PSRCHPHN.DAT.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\ExcelTellMeOnnxModel.bin.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7ES.LEX.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\7-Zip\Lang\ko.txt.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\PresentationCore.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework-SystemCore.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_SubTest-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ONGuide.onepkg.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\Graph.exe.manifest.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-black_scale-80.png.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jre-1.8\lib\flavormap.properties.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Checkmark.White.png.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Common Files\microsoft shared\ink\it-IT\tabskb.dll.mui.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\UIAutomationProvider.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-localization-l1-2-0.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\7-Zip\Lang\fr.txt.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\7-Zip\Lang\sr-spl.txt.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Common Files\microsoft shared\ink\et-EE\tipresx.dll.mui.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\System.Windows.Forms.Design.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jre-1.8\bin\dt_shmem.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Grace-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_KMS_Client-ul.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Common Files\microsoft shared\ink\ipsdeu.xml.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Primitives.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\WindowsFormsIntegration.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\System.Xaml.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\WindowsFormsIntegration.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\xerces.md.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription1-pl.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_OEM_Perp-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Windows.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.FileSystem.Watcher.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationCore.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\System.Windows.Input.Manipulations.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\System.Windows.Forms.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\bin\javap.exe.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_Subscription-ul-oob.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\UIAutomationClient.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\javafx\webkit.md.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProXC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusMSDNR_Retail-pl.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.Loader.exe.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\System.Windows.Input.Manipulations.resources.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\xerces.md.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_KMS_Client-ul.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\excelcnv.exe.manifest.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Office16\ONENOTEM.EXE.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_OEM_Perp-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.Formatters.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\hostpolicy.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\decora_sse.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-processthreads-l1-1-0.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Java\jre-1.8\lib\deploy\[email protected] 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription2-ppd.xrm-ms.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Printing.dll.tmp 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.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 2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe"C:\Users\Admin\AppData\Local\Temp\2af938ddfec882e3cf440c2d57f251bba7794317042bc65392bd7b302b0bc07d.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:5464
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
66KB
MD547b312b944c7766e8e2051c0d838a8cc
SHA1dcc5c5fda9cb54719000ea8fcba5a1293511076e
SHA25687b07124002e7a3a127db5a7915bf1f40d5a4179aab1ccd2ecdc4326cfcae4da
SHA51246b07b0252bdfa2b367fdd6c62ba99a9af851fcebc9a8061ff16887eef9cbf0b1796f291cd6a9a28a9496c505f15fcf379e50f384ab4cd9a707256138013f585
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Filesize
152KB
MD5f39956b5c91613f562edf0c708541ee4
SHA1a79a82aea2dfaa86d8420e180f17fa1fcebc88d5
SHA256c2f7aeb030e522fd317b0167f462ba2edbb22f12e156b7d8ff996c0863744be1
SHA512c09cfe2f0d1a4250d6d0f3f90cac76c8c88cabbc21f577e81e4eb3537a34d08c5980033600218b1b9b4be99960ed32eea04ade551c2cdd93d0be18d52ce80fd6