Analysis
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max time kernel
150s -
max time network
141s -
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, 11:58
Static task
static1
Behavioral task
behavioral1
Sample
8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe
Resource
win10v2004-20250502-en
General
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Target
8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe
-
Size
41KB
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MD5
acf717a3b3c2078d564c5ead80c56ee4
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SHA1
4613ec80419f2c13933c6f73d9b0f1061a41fcbc
-
SHA256
8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5
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SHA512
26c65d2fa57819c629ce8792dff04a2f02fa1693089ea5f840c3a85a8d85df29d74163f2abcbe43758f27deab554261aeba697365ab7c2f1f51f202750c7b2f4
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOr9NNV5H/V36aNQP+OKGDw9ce9cwwlws:uZ4FLz8ae+rOn8ae+rO2aNQP+UDQvh4J
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/4856-803-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5222) 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.WindowsDesktop.App\8.0.15\es\WindowsFormsIntegration.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\api-ms-win-crt-environment-l1-1-0.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\Library\EUROTOOL.XLAM.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSGR8FR.LEX.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\Training.potx.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\microsoft shared\ink\hwrdeusymnn.dat.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\WindowsBase.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Formats.Asn1.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-locale-l1-1-0.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\offsymk.ttf.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\basicelegant.dotx.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL109.XML.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\System\msadc\en-US\msdaremr.dll.mui.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Cryptography.Primitives.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ValueTuple.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Design.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\UIAutomationTypes.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Java\jre-1.8\lib\jvm.hprof.txt.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Cambria.xml.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.Specialized.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Threading.Channels.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\win32_LinkNoDrop32x32.gif.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-util-l1-1-0.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0018-0000-1000-0000000FF1CE.xml.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.PPT.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\DocumentFormat.OpenXml.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\cpprestsdk.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\UIAutomationClient.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\attach.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ospintl.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\FPA_FA000000011\FA000000011.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\Library\Analysis\ATPVBAEN.XLAM.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\Blog.dotx.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\Microsoft.VisualBasic.Forms.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial2-ppd.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\ExcelNaiveBayesCommandRanker.txt.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\msspell7.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\EssentialReport.dotx.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Internet Explorer\iediagcmd.exe.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\7-Zip\Lang\lij.txt.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\coreclr.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationCore.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\System.Windows.Forms.resources.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial5-ppd.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessVL_MAK-ul-phn.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\GRAPH.ICO.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSHY7EN.DLL.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\System\ado\adojavas.inc.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Cryptography.OpenSsl.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\PrivacySandboxAttestationsPreloaded\manifest.json.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_PrepidBypass-ul-oob.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\BORDERS\MSART7.BDR.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogo.contrast-black_scale-180.png.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL108.XML.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Office16\SkypeSrv\SFBAPPSDK.DLL.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main.xml.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\System\Ole DB\oledb32r.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Common Files\System\Ole DB\oledbvbs.inc.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Private.DataContractSerialization.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-rtlsupport-l1-1-0.dll.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial-ul-oob.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_SubTrial-pl.xrm-ms.tmp 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.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 8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe"C:\Users\Admin\AppData\Local\Temp\8a22c1523e4518c6cc2ac47bc04048d7b16e3a0a1786c32d4ac5ff15eb85c9e5.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4856
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
41KB
MD5ef393c331c1b8b110da62e36b7146a4d
SHA137ec511e573fded7fe306122659d9ec982aeed1a
SHA2561cebf98b58e8053b3b3cf90e3b7e9a04ea14d84a6f02b16c24153af41a19aac1
SHA512ddf0a53c87f17382dc25a85e0b96ff584bb0d25626b18d9d3348c48d27c06ec79a0bee0e150c6ab517068394a137934afed77f798647163a5ad7488252301440
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Filesize
122KB
MD5923b2061d42cd53fbc07dff7a59bcbf1
SHA1c463f5178a430614ad8601be5ce5c5664ca95f6c
SHA2560426b0a98faa084fecea7f3c1a05c7ccdf75110221522e37cf1e436e3b3c68d5
SHA512917b52cf6b46f780764e0ef81245ee0404bf98608e0cc9cc8e4b335023b2fd3e2b8d08ec4c2ac39a5ec46fd17fe2e7f52a173321172c12bbd205cdccf71e8683