Analysis
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max time kernel
150s -
max time network
110s -
platform
windows11-21h2_x64 -
resource
win11-20250502-en -
resource tags
arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system -
submitted
29/05/2025, 10:01
Behavioral task
behavioral1
Sample
2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe
Resource
win11-20250502-en
General
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Target
2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe
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Size
38KB
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MD5
ffe5d3a78b5d45ba66dc102388e5b6ca
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SHA1
adb6b804e04f17ebf99e916fa0ace43fbcbf1bb2
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SHA256
2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5
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SHA512
80a5365df056a45816704035daef2f8cb9500a7259b4ec2ccd4f288303624dd34e8cc48738c4b7e19f78fed5f8a7d769ffe94fd2767e1fd450f9a578e0375a58
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SSDEEP
768:s7BlpppARFbhdLz8ae+rOn8ae+rOfXqJ7gJ7ITr:s7ZppApdIISJ7gJ7c
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 behavioral2/files/0x001c00000002aec8-1.dat family_cosmu behavioral2/files/0x000400000002700d-5.dat family_cosmu -
Renames multiple (5244) 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\6.0.27\zh-Hans\UIAutomationProvider.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationClientSideProviders.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\w2k_lsa_auth.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Arial.xml.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ul-phn.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\ar\msipc.dll.mui.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\7-Zip\Lang\lij.txt.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-string-l1-1-0.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Text.Encodings.Web.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jre-1.8\bin\jp2launcher.exe.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\7-Zip\Lang\kk.txt.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\server\Xusage.txt.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGLBL020.XML.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Common Files\microsoft shared\ink\th-TH\tipresx.dll.mui.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\System.Windows.Forms.Design.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_Retail2-pl.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\7-Zip\Uninstall.exe.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sv-se.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\verify.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Retail-ppd.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\UIAutomationClient.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\WindowsBase.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Forms.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\PresentationFramework.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\WidevineCdm\manifest.json.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\bin\javapackager.exe.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\relaxngdatatype.md.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jre-1.8\legal\javafx\icu_web.md.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial2-pl.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Grace-ul-oob.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusinessR_Grace-ppd.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\GostName.XSL.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\msotelemetryintl.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\ExcelTellMeOnnxModel.bin.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\TEMPSITC.TTF.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\WindowsFormsIntegration.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.exe.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jre-1.8\lib\javaws.jar.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial2-ppd.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\CSS7DATA000C.DLL.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Windows.Input.Manipulations.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\System.Xaml.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\System.Windows.Input.Manipulations.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\swidtag\Microsoft Windows Desktop Runtime - 7.0.16 (x64).swidtag.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\te.pak.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Pipes.AccessControl.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Runtime.Serialization.Formatters.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\bcel.md.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\7-Zip\Lang\ja.txt.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Common Files\System\ado\es-ES\msader15.dll.mui.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest5-pl.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial1-ul-oob.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_OEM_Perp-ppd.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\mip_telemetry.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\tr\msipc.dll.mui.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Common Files\microsoft shared\ink\fr-FR\InputPersonalization.exe.mui.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Core.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\ReachFramework.resources.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Java\jre-1.8\THIRDPARTYLICENSEREADME.txt.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_SubTrial-ul-oob.xrm-ms.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\FPA_f33\FA000000033.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Microsoft Office\root\Office16\WINWORD.EXE.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Common Files\microsoft shared\ink\tabskb.dll.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\it.pak.tmp 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.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 2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe"C:\Users\Admin\AppData\Local\Temp\2e1f586697c83304478107b3553d5bc87f86833676fb84c2dcb837358369aaa5.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4192
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
38KB
MD5aa590ddfc20a353efd70f5d53d31c53e
SHA15f2d729d2f4560d5aa1ce9a5ef1d745a54b316c2
SHA256d8cc67c5414b6c077e996277a920c731d885c4cebd9de1ba4ebf997b280bc827
SHA512dfe003383335b2b3885fff01cf3303051799a0ddc832cad8ab6d85af8f427b84ca1c768e94c0132f5669a865a5c1d14b7611e9b846a1933ba745921d88791720
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Filesize
124KB
MD5dc1fc0c14b336e7e636231bbb3020576
SHA18a303950ee22b0bf0d824e5bbb5446dd9363543b
SHA25648730f53c0ed1f7da8108cf166df3d8e60d5a4b327cf3693d6554a119450021f
SHA512714f773c30d7db294713f12da01dbdb44f94c813facc3eef274914ee066d3e83080f586f733eabb6bcbbeae3b3ee0406c3a294af6e16d22a9f945049a43aedae