Analysis
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max time kernel
150s -
max time network
135s -
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, 10:03
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
-
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 behavioral1/memory/3676-827-0x0000000000400000-0x0000000000407000-memory.dmp family_cosmu -
Renames multiple (5276) 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\Java\jre-1.8\lib\deploy.jar.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_Trial-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription3-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_OEM_Perp-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\Locales\kn.pak.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.da-dk.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\System\msadc\msadco.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Private.Uri.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\System.Windows.Forms.Design.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\GroupMerge.mov.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Retail-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_Retail-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Personal2019R_Retail-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\Microsoft.VisualBasic.Forms.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-console-l1-2-0.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessPipcR_Grace-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Retail-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_KMS_Client-ul.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\msotdintl.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Windows.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\VisualElements\Logo.png.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\release.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdO365R_Subscription-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Client\AppvIsvSubsystems64.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\OutlookR_OEM_Perp-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\1033\MSOUC.HXS.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ink\es-ES\TabTip.exe.mui.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\cryptix.md.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\legal\jdk\zlib.md.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalPipcR_OEM_Perp-ppd.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\ProjectProCO365R_SubTrial-ul-oob.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\FirstRunLogoSmall.contrast-black_scale-140.png.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\UIAutomationClient.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.MemoryMappedFiles.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-datetime-l1-1-0.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_KMS_Client_AE-ul.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\MSIPC\ipcsecproc.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\FrequentOfficeUpdateSchedule.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Diagnostics.DiagnosticSource.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Private.Xml.Linq.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\UIAutomationClientSideProviders.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\133.0.6943.60\eventlog_provider.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\bin\javah.exe.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\lib\cmm\sRGB.pf.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\legal\jdk\xmlresolver.md.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\bin\j2pcsc.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\bin\unpack.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\lib\ext\localedata.jar.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_OEM_Perp-pl.xrm-ms.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\FPA_f33\FA000000033.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\osknumpad\osknumpadbase.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\System.Windows.Forms.resources.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Google\Chrome\Application\initial_preferences.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jdk-1.8\jre\legal\jdk\pkcs11cryptotoken.md.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Java\jre-1.8\bin\t2k.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\1036\MSO.ACL.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.ro-ro.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.FileSystem.AccessControl.dll.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0115-0409-1000-0000000FF1CE.xml.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Document Themes 16\Integral.thmx.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\LogoImages\OneNoteLogoSmall.contrast-black_scale-80.png.tmp 1538aaf961a3243433f4f52cb5ed586b357daa0fae8e34fffebb04225d87d51d.exe File created C:\Program Files\Microsoft Office\root\Office16\PAGESIZE\PGMN089.XML.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:3676
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
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Filesize
19KB
MD5ba3ddf321d84d0526f2e018c65d5504b
SHA1f6bd1d7062211a28c275dedca4aca8f13f3f6b70
SHA256fe6e9bb563f76aeb52d9cb96e3566f1c05160f7edfd06b938fdc60a6dffbd368
SHA5122faf4d91cf014a8eabc2a3c44c73ca6eabcdfaa21bdcfc04c72948dd22f218fbf68a5a92027eb56740a3332dd673b07d75a4b1511c8d3496ebb38575b30af336
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Filesize
99KB
MD503d9c59692f8be71d784a775ee4754ed
SHA18e7f20c875e1a7f1069c1073efcd8bcd44d243e6
SHA25608e84350c8ec052eea6cc11c8cef1688e10966c7acab37ef58f19358d4d4adb6
SHA512cc264589d0707c7bbf2ab817c26e4ce9becb2adaf73611b07f527de48ea763547d338bd24786bb906053cba4ac3721e2c81c1ea4dad45199fb2088cca987ebd2