Analysis
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max time kernel
149s -
max time network
138s -
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, 10:01
Static task
static1
Behavioral task
behavioral1
Sample
21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe
Resource
win10v2004-20250502-en
General
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Target
21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe
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Size
78KB
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MD5
b4aaa7de6d064f1a58885297067a4e28
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SHA1
f353c9db32b0db2134443d83a99ef677d6957a8b
-
SHA256
21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17
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SHA512
8051a25922104d956483263cbdef375e8a62eab38c013acc7b97bf82af426cb7d1c6217596142355eda3335f2376ccd66a19a5ee08b5de044d2243b23c2e514e
-
SSDEEP
1536:uGIINlsPKe9Tdxz2dmn2ja+ZhuB0oEvBnHHwTVEvBnHHwTEu7x:LehXz2ja+PuioT/
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/2692-797-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5036) 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\MEDIA\CASHREG.WAV.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\no\msipc.dll.mui.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\TextConversionModule.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Dynamic.Runtime.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jre-1.8\lib\ext\sunjce_provider.jar.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Client\msvcp120.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial2-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\System.Web.Mvc.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.contrast-white_scale-100.png.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\ApiClient.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\ar\msipc.dll.mui.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\7-Zip\Lang\cy.txt.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Common Files\microsoft shared\VSTO\vstoee.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-synch-l1-2-0.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\swidtag\Microsoft Windows Desktop Runtime - 8.0.15 (x64).swidtag.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\it.pak.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Integration\C2RManifest.wordmui.msi.16.en-us.xml.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioProDemoR_BypassTrial180-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.TypeConverter.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\System.Windows.Input.Manipulations.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\PresentationFramework-SystemData.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Controls.Ribbon.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\UIAutomationProvider.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\Microsoft.Win32.SystemEvents.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_SubTrial2-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlusDemoR_BypassTrial180-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Common Files\microsoft shared\ink\sl-SI\tipresx.dll.mui.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\UIAutomationProvider.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\api-ms-win-core-console-l1-2-0.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-string-l1-1-0.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Trial-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_K_COL.HXK.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.SapBwProvider.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7ES.dub.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jdk-1.8\bin\kinit.exe.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jre-1.8\lib\fonts\LucidaTypewriterRegular.ttf.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp2-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Grace-ul-oob.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000027\assets\Icons\NewCommentRTL.White.png.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Extensions.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationUI.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\ReachFramework.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\fontmanager.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Trial-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_MAK-ul-phn.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\OUTLFLTR.DLL.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Common Files\microsoft shared\ink\Content.xml.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Common Files\System\msadc\ja-JP\msaddsr.dll.mui.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\Microsoft.VisualBasic.Forms.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ExcelR_Trial-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_OEM_Perp-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Primitives.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription2-pl.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\PerfBoost.exe.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-pl.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\Microsoft.VisualBasic.Forms.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Windows.Controls.Ribbon.resources.dll.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_Retail-ppd.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\7-Zip\Lang\fur.txt.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Retail-pl.xrm-ms.tmp 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.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 21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe"C:\Users\Admin\AppData\Local\Temp\21a2669cd7b95c1063ab86b311b18f54c1f247e4aa22178dff90c400a71b9e17.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2692
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
78KB
MD5422541587a88bc79c5d4387c06afd1f2
SHA1d897594e6f07393733dafe248f284522a1fe4a1a
SHA2561b970e34dd6c1dc77a305ddf4bd42cc245c8c9bee772a88034bde5c640762998
SHA512f23e314741607faae40b00b9d8140426ef102e0cb5f835a1c3bfbd815ed4566e05e8c556f3f6bae7d8d2cf04be6067fec585f36a9821eb5dc7afccc4a0ed0882
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Filesize
164KB
MD5c096d20908483d2f4e8939fad5727d31
SHA1bf1cc1764853c8de0532782f6d4baeee9d11cc24
SHA256514bc06a6ecaa803d0ed247c736584accd8f6de5488bf99f5483f3750017d727
SHA512c240783ab827c859775134a661c187cfa28f6212306ffbc3856db328da13f56c5090ba3245b2cb81693c97e85c3462177652362cb79b240a8ce02f044b5a00b0