Analysis
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max time kernel
150s -
max time network
103s -
platform
windows11-21h2_x64 -
resource
win11-20250502-en -
resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system -
submitted
05/06/2025, 08:17
Static task
static1
Behavioral task
behavioral1
Sample
aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe
Resource
win11-20250502-en
General
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Target
aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe
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Size
27KB
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MD5
4a79767c29563c4595e4fd9bc2205446
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SHA1
e615101dcfa8ed975b56c53481dda9b51bc9b957
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SHA256
aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343
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SHA512
4358b90a6960956625764d4fe9c841274b39f3e88321adf9e24bc40eca3e9be5baea6246fceaad3a41861fc5ba36a2c73d931eadc2d6f577bdc58ed39d255c73
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SSDEEP
768:uZ4FLz8ae+rOn8ae+rO44Ph4PmbX8xsni1xDbX8xsni1xQ:uGII4ehem7AP7A0
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 behavioral2/memory/1068-1229-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5357) 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\Common Files\System\ado\msadox.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\PersonaSpy\personaspybridge.js.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\vstoee.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\System\msadc\adcvbs.inc.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.Win32.Registry.AccessControl.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jre-1.8\lib\ext\nashorn.jar.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jre-1.8\lib\jfr.jar.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jdk-1.8\bin\native2ascii.exe.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jre-1.8\lib\security\javaws.policy.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Grace-ppd.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_SubTrial-ul-oob.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\eu\msipc.dll.mui.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\OIMG.DLL.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Extensions.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Forms.Design.resources.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\sw.pak.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Grayscale.xml.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\WordVL_MAK-ppd.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.DataIntegration.TransformDataByExample.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\jpeg.md.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial2-ul-oob.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\sk\msipc.dll.mui.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\msotelemetry.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\URLREDIR.DLL.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.XmlDocument.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\deploy\ffjcext.zip.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\AccessVL_MAK-ppd.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Retail-pl.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019DemoR_BypassTrial180-ul-oob.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ul-phn.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_SubTrial-pl.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\CancelGlyph.16.GrayF.png.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\keypad.xml.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\System.Windows.Input.Manipulations.resources.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\resources.pak.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Internet Explorer\hmmapi.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherVL_MAK-ul-oob.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ppd.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogoSmall.contrast-white_scale-100.png.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hans\PresentationCore.resources.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\bg.pak.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\xmlresolver.md.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.OData.Edm.NetFX35.V7.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\msvcp140.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\ja-jp.xml.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\microsoft shared\ink\ipsptb.xml.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Common Files\System\msadc\it-IT\msdaremr.dll.mui.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Text.Encoding.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Claims.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\offsymb.ttf.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000042\catalog.json.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ValueTuple.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\WindowsBase.resources.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\UIAutomationProvider.resources.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Java\jre-1.8\lib\ext\sunpkcs11.jar.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\msproof7.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.WebProxy.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Input.Manipulations.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_KMS_Client_AE-ppd.xrm-ms.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\POWERPNT.HXS.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Security.Cryptography.Csp.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\PAPYRUS.TTF.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationNative_cor3.dll.tmp aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.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 aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe"C:\Users\Admin\AppData\Local\Temp\aa672896703c6c2e8a3dceb6a2c43b0c62e5ea83c369824e45c927c658b4c343.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1068
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
27KB
MD5a2a80b71f06a640ee18b706594a0f994
SHA16169b54cc28fc032c8f2cff531e3d1acb21550aa
SHA256a046022659872a2c19bcbca346d720ee18d8ef7167f86fa2b1c0bd6fa8a0ae9e
SHA51267502325f61bb71129f1186efdb6068c77ae84515713d566736bac27c599e75800b8120d3c9ab975afe922f509951af642a412d25773ee4219a4df1ee425e5ba
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Filesize
107KB
MD5ae010603a644b5537a0c73a400fbd8ca
SHA18381af5c457a00120ab983b58efb2fb9cb875b14
SHA256f960cf0e736c85ef09a7a21e7871610f5bb5593a07783f1030000cca2e9ad510
SHA51277f81fd7f9131c09c82348fe784640738e3c1d090eef9d17138880cd0e588609c5e97f752f569ecff4fed49b7836b8bb2c9a6aed8c657777882450ae8d07629f