Analysis
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max time kernel
149s -
max time network
144s -
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, 10:04
Behavioral task
behavioral1
Sample
28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe
Resource
win11-20250502-en
General
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Target
28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe
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Size
34KB
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MD5
c723f0584ef526efa1f1eaea94df14d8
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SHA1
b984a485db4a2f68effbe007c5f78585ddc53b0a
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SHA256
28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f
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SHA512
ac3db58129c3e04a214ef3deee51a01bb2298523979724e1ddbd27a3ffc46bc5851301226592539453ff7f245a66c7d15e34a0751d360f94ddda69f2ef022bb9
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SSDEEP
768:s7BlpppARFbhdLz8ae+rOn8ae+rO+4500n1kJ00n1khxhxz:s7ZppApdII+49101az1
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 behavioral1/files/0x000d00000002401f-1.dat family_cosmu behavioral1/files/0x000400000001eea5-5.dat family_cosmu -
Renames multiple (5194) 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\Office16\MSOARIACAPI.DLL.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Templates\1033\Office Word 2003 Look.dotx.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\ThirdPartyNotices.ja-jp.txt.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\hostpolicy.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\UIAutomationClient.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_OEM_Perp-pl.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Trial-ul-oob.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_OEM_Perp-ppd.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\MSO0127.ACL.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Grace-ppd.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PersonalPipcR_OEM_Perp-ul-oob.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\System\msadc\en-US\msadcer.dll.mui.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Diagnostics.PerformanceCounter.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jdk-1.8\bin\javah.exe.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jdk-1.8\lib\jconsole.jar.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\[email protected] 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-string-l1-1-0.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\ko-kr.xml.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\Microsoft.VisualBasic.Forms.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\Accessibility.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jre-1.8\lib\ext\nashorn.jar.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Client\api-ms-win-crt-time-l1-1-0.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power View Excel Add-in\Microsoft.ReportingServices.AdHoc.Excel.Client.Entry.Interfaces.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000049\index.win32.stats.json.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Retail-ppd.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\hr-HR\tipresx.dll.mui.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.Principal.Windows.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-rtlsupport-l1-1-0.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\MEDIA\ARROW.WAV.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\de-DE\ShapeCollector.exe.mui.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\WindowsBase.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\System.Windows.Forms.Primitives.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_OEM_Perp-ppd.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\SkypeForBusinessVDI2019_eula.txt.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\ExcelCtxUICellLayoutModel.bin.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN096.XML.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\rsod\officemuiset.msi.16.en-us.tree.dat.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework-SystemData.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN102.XML.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\de\System.Windows.Forms.Primitives.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Printing.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\7-Zip\Lang\nb.txt.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ink\uk-UA\TipTsf.dll.mui.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jre-1.8\bin\plugin2\vcruntime140.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jre-1.8\lib\jce.jar.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\rsod\excelmui.msi.16.en-us.boot.tree.dat.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\rsod\word.x-none.msi.16.x-none.tree.dat.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft\OFFICE\SharePointPortalSite.ico.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\vfs\Fonts\private\BSSYM7.TTF.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationCore.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\System.Windows.Input.Manipulations.resources.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Java\jre-1.8\bin\rmid.exe.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Retail-pl.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.lt-lt.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\Microsoft.Win32.Primitives.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\D3DCompiler_47_cor3.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Office 2007 - 2010.xml.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019VL_MAK_AE-ul-phn.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_OEM_Perp-ul-oob.xrm-ms.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\cardview-addtotable-dark.png.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\Delete.White.png.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\UIAutomationTypes.dll.tmp 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.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 28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe"C:\Users\Admin\AppData\Local\Temp\28c985e09a5844317c11719cb45e2cdb7e59aace44f368d17b5093699cf70a1f.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2088
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
35KB
MD59ec932f5250045049bb68e0473f13250
SHA14398889f84988bc8157a11324e6fee3ed0c37f30
SHA256e3f8ba4d49d53c56479104c41231f3670089c354ecb6fee6434c1c6b25356424
SHA5122e8b22b128a3d46b8b683e75b14d0db20486124d428e0bbfd8073b15d4b98bfe04fa7bda9922ad917193d3d550b90ebce30c2a96de81690fb55412304580d1a2
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Filesize
120KB
MD5b86b54057ffff726de20a5f253fa0aa2
SHA1f7bf5a306d3cebef88a813d3cb23503def6fed0c
SHA256665bed7e0ed58376932abbfb7b3be205669f9441156c263cc831dd1c3d73ec94
SHA5127cd07a01a208063521248a463bc813c579bb25bc2126969d0bc4420b9eeaafa20bef7604287a743c944b5ae5fc70f16d6a1ec0426b99d9011a4f241b681aca58