Analysis
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max time kernel
149s -
max time network
102s -
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, 10:03
Static task
static1
Behavioral task
behavioral1
Sample
1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe
Resource
win10v2004-20250502-en
Behavioral task
behavioral2
Sample
1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe
Resource
win11-20250502-en
General
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Target
1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe
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Size
19KB
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MD5
47767e2fdcb0df95f9aa2be6ad447f53
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SHA1
3d5a9b8848b3ea32c95734fe7523f6b36defc0cc
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SHA256
1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d
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SHA512
0e4ad12991c4efacdf03508ad9cf62808a8da61bc2da1f15f85745fddfda07ebfe9b02750d34de6607cd3ead8372e1462a9a3974a8c5d1545652aa735d9fe4c0
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SSDEEP
384:hAg+5OCZ4W6/KWLsqmFae+rOAqmFae+rOdAwAJOgYAwAJOgPoAxpOiJfoAxpOiJT:uZ4FLz8ae+rOn8ae+rOewAJxrwAJxPou
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/6048-1233-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5362) 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\Licenses16\VisioStd2019R_Grace-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\7-Zip\Lang\yo.txt.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\PresentationUI.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\am.pak.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\security\trusted.libraries.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\vfs\Common AppData\Microsoft\OFFICE\SharePointPortalSite.ico.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.DispatchProxy.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Xml.Serialization.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial4-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Standard2019MSDNR_Retail-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_Grace-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\offsymxl.ttf.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\WinWordLogoSmall.scale-140.png.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\rsod\wordmui.msi.16.en-us.tree.dat.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\System\msadc\msdarem.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\System\Ole DB\ja-JP\sqloledb.rll.mui.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Runtime.Serialization.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription3-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription1-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProMSDNR_Retail-ul-phn.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019MSDNR_Retail-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_Retail-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\Bibliography\Sort\AUTHOR.XSL.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\System\Ole DB\fr-FR\sqloledb.rll.mui.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\WindowsFormsIntegration.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\UIAutomationTypes.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ink\ja-JP\TabTip.exe.mui.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\WindowsFormsIntegration.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\jp2iexp.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\PackageManifests\AuthoredExtensions.16.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Trial-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\coreclr.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ja\System.Windows.Controls.Ribbon.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\ja.pak.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\LivePersonaCard\images\default\linkedin_ghost_company.png.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\sdxs\FA000000018\cardview\lib\native-common\assets\[email protected] 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ink\ipsplk.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Windows.Extensions.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\jawt.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\bin\plugin2\vcruntime140_1.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\dom.md.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentVNextR_Grace-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\PowerPointNaiveBayesCommandRanker.txt.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\UIAutomationClient.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\UIAutomationProvider.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\tr\PresentationFramework.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Client\vccorlib140.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Slipstream.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Retail-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_OEM_Perp-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\7-Zip\Lang\ro.txt.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ink\mshwLatin.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\Microsoft.VisualBasic.Forms.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\ro.pak.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail2-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019VL_MAK_AE-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019VL_MAK_AE-ul-phn.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\PROOF\MSSP7FR.dub.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Forms.Primitives.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework.Aero.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\nl.pak.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.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 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe"C:\Users\Admin\AppData\Local\Temp\1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe"1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:6048
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
19KB
MD52c6feb9aa35d8f92824e7225aea234a1
SHA1624a10975f875fa55c7ce4b4a3cbe9641cc5e13d
SHA256d1a0bb2549d98863571a4b4bd280ad424c190d5c1b1bf736856c75cd23b8d0c7
SHA512f326dba456321e28e32384582addf8d7b3a72a476279fb3d0bd0a48618fe108c2f894ef6968e52df7778a3a16d845126093147ddf64b56f9576fd254b313fdb1
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Filesize
100KB
MD522b673a002e8832b8362b843f881856e
SHA18d32af9a6459e772b2ea0e05888cf43d0de331e3
SHA25636b30e4fc43bbe2fdc134d45eb288ade2a5e33248f6ec91222bf4c4eea144f2e
SHA512fa8c8760887ef3329258984c918c6c5a9d5118256b5f7d45fdf29d7bde2260151638432d97ed32ed0b465b4a5b334b6444d00a94b1704bfb68320751373da178