Analysis
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max time kernel
149s -
max time network
134s -
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, 11:59
Static task
static1
Behavioral task
behavioral1
Sample
4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe
Resource
win10v2004-20250502-en
General
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Target
4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe
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Size
39KB
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MD5
9d8f3d48ce801fa55fa7d81a3b8b4b66
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SHA1
c4f5fc214a1dc973e00d6b7ae93391488786a917
-
SHA256
4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788
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SHA512
b5783e523aea34d7128a12bfd9a8c2fd14795b151317d5b0052c4d77e66b131e78e0d4c9d0ef0f30edaaba1cadef0470f8a190b3da8b8102f931f535d359a672
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SSDEEP
768:uZ4FLz8ae+rOn8ae+rOrZkZ/7SRDGRDBYyyQxXAYyyQxX0:uGII1GeFGFBYythAYyth0
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/2896-809-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5208) 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\vfs\Common AppData\Microsoft Help\MS.WINWORD.16.1033.hxn.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Xaml.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\OFFSYMSL.TTF.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Formats.Tar.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\bin\keytool.exe.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jre-1.8\bin\vcruntime140.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessR_OEM_Perp-ul-oob.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\7-Zip\License.txt.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-crt-process-l1-1-0.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunec.jar.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Retail-pl.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-ppd.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_ViewOnly_ZeroGrace-ppd.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription3-pl.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.Thread.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Controls.Ribbon.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\prism_d3d.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Common Files\microsoft shared\ink\en-US\tabskb.dll.mui.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-phn.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Cryptography.OpenSsl.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\UIAutomationProvider.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\plugin2\msvcp140.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019VL_MAK_AE-pl.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Security.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\PresentationCore.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\System.Windows.Forms.Design.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Google\Chrome\Application\chrome.VisualElementsManifest.xml.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\include\win32\jawt_md.h.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\sspi_bridge.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jre-1.8\bin\msvcp140.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\Office16\OSPP.VBS.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\UIAutomationTypes.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\giflib.md.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Retail-pl.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordR_Retail-ul-phn.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.exe.config.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.contrast-white_scale-180.png.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\msipc.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\PowerPointInterProviderRanker.bin.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\attach.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Java\jre-1.8\legal\javafx\public_suffix.md.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\JitV.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\msvcp120.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Common Files\microsoft shared\ink\tr-TR\tipresx.dll.mui.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\mscorrc.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.DataAnnotations.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sr-Cyrl-BA\msipc.dll.mui.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sv\msipc.dll.mui.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\index.win32.bundle.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsBase.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\PresentationCore.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-ppd.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Dynamic.Runtime.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\UIAutomationProvider.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\System.Windows.Controls.Ribbon.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\chrome_pwa_launcher.exe.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ul-oob.xrm-ms.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\HintBarEllipses.16.White.png.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\AppVIsvStreamingManager.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Xaml.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\WindowsFormsIntegration.resources.dll.tmp 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.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 4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe"C:\Users\Admin\AppData\Local\Temp\4a2ac3721bef48e480fea40f5c9f5d30d97e54fc1a9a86cc97ed519616fde788.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2896
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
40KB
MD526235591df534765a82d2bb665a00b60
SHA1fc3dd307530346df42d86d91dcb6c817d590bd78
SHA256db78dd80518b347d43f365efa44af8d387561e4666f5eea6eecf75084b4aa25b
SHA512af75a3755c8962ca7b321c4efc6289002321d4652e277421d6636e158246c5101286986f985830f0eef7edfe84551b74e44683b2c2ea3a59a223712a134040d6
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Filesize
126KB
MD55ad3f6e275d9f23ff8892f372efa0ad4
SHA16a4366e96a45a2e323f49bbae3e7fd4b4d638d79
SHA256615146c8c02d3ccfc58a8017e0428d31b66d2ac9d09c719b535cabf76ba0ee2f
SHA512e36995ddd25534920418a7ad8d9cdcd007dbfdee38cb59f223abcbe36c0a2b386d02606f5aa86165763d15c8aec0e39e6b2aa9116325103849c49cf5e1f19837