cosmu | 4a72533ef75a1321facc534bd9c3644454ba179895ff23f06c0401ffd1583e6f

Analysis

max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
30/07/2026, 07:51

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General

Target
2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
Size 86KB
Sample260730-jptrxatdme
SHA256 4a72533ef75a1321facc534bd9c3644454ba179895ff23f06c0401ffd1583e6f
MD5 7950cc188e65b0f3e156830d5edd1955
SHA1 57d1dd327232bd9054d67b03e5e8331075a61f37
SHA512 fdce41af20c2198ed15b3c4ad097ec6e0a8fb816edb5e8e363899adde871a29fb1931c47f0be67f96cd90e64efc1e74960bcd20c8ee12c6ea948bb1984f277c9
SSDEEP 1536:p7ZhA7dAp1++PJHJXA/OsIZfzc3/Q8OyZ2Fdlda+e8ccT+e8ccu:Te76WQSonyZ2Fdldab8ccTb8ccu
TLSH
T199933ABF8F50F06AE72650769C263775EDB0AC0B36A4E9B9BE2005384912FF655CC127
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery cosmu ransomware worm

Malware Config

Signatures

Family: Cosmu
Cosmu is a Windows worm written in C++.
worm cosmu

Detects Cosmu payload 2 IoCs

Cosmu is a worm written in C++.

resource	yara_rule
behavioral2/files/0x000d00000001c5a1-1.dat	family_cosmu
behavioral2/files/0x000400000001b1b2-5.dat	family_cosmu

Renames multiple (4118) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Drops file in Program Files directory 64 IoCs

description	ioc	Process
File created	C:\Program Files\Common Files\System\msadc\en-US\msadcer.dll.mui.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\UIAutomationTypes.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\ext\sunjce_provider.jar.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_BypassTrial180-ppd.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\sw.txt.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_OEM_Perp-ul-phn.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-pl.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019MSDNR_Retail-ul-phn.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Trial-pl.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProR_Retail-ul-phn.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\createdump.exe.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.IO.FileSystem.DriveInfo.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Threading.Channels.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hans\System.Windows.Forms.Primitives.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-ul-oob.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\UIAutomationClient.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\UIAutomationProvider.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\tr\PresentationFramework.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Http.Json.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\WindowsBase.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaTypewriterRegular.ttf.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Integration\C2RManifest.Proof.Culture.msi.16.es-es.xml.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_Retail-pl.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ul-oob.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_Retail-ppd.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\WindowsFormsIntegration.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\UIAutomationProvider.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\PresentationUI.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\jvm.hprof.txt.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest4-pl.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Retail-ul-phn.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\SkypeforBusiness2019R_Grace-ul-oob.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_KMS_ClientC2R-ppd.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ms-MY\tipresx.dll.mui.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\DismountSkip.mpeg2.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.Primitives.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Marquee.xml.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\adcjavas.inc.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.IO.Packaging.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ko\System.Windows.Forms.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Diagnostics.EventLog.Messages.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\UIAutomationClientSideProviders.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-file-l2-1-0.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\deploy\[email protected]	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription4-ul-oob.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\jp2launcher.exe.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\fonts\LucidaSansDemiBold.ttf.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\officeinventoryagentlogon.xml.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\kok-IN\tipresx.dll.mui.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\micaut.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\PresentationFramework.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Security.Permissions.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Google\Chrome\Application\140.0.7339.81\Locales\zh-CN.pak.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019VL_KMS_Client_AE-ul.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.Pipes.AccessControl.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\Office16\OSPP.VBS.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Effects\Extreme Shadow.eftx.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_KMS_Automation-ul.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\WindowsFormsIntegration.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\WindowsFormsIntegration.resources.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.cpl.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\ssv.dll.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_Grace-ppd.xrm-ms.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\ja-JP\InkObj.dll.mui.tmp	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-30_7950cc188e65b0f3e156830d5edd1955_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4328

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

desktop.ini.tmp

Path C:\$Recycle.Bin\S-1-5-21-2115213192-531537726-3295841909-1000\desktop.ini.tmp
Size 87KB
SHA256 56888e7f2c40ef980ba2645e994be4cc53a02b5eecb03aafa130615bd3e44bf9
MD5 0323e917f354c0d4b3a812e055c301f3
SHA1 e01aedf73f59d91ec7205a0341c6fdee83303ca1
SHA512 620bd82aa744d1f624b129602424450b6a76dee11db2fff05bac4778cd71bc2c96cff9f8aea9be3e40590d121ecc957a0901fba64c2e3b4dabf59d68f9be44d5
SSDEEP 1536:p7ZhA7dAp1++PJHJXA/OsIZfzc3/Q8OyZ2Fdlda+e8ccT+e8ccm:Te76WQSonyZ2Fdldab8ccTb8ccm
TLSH
T173934A7F8F50F06AE72650769C263775EDB0AC0B36A4E9BABE2005384912FF655CC127
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

7-zip.dll.tmp

Path C:\Program Files\7-Zip\7-zip.dll.tmp
Size 186KB
SHA256 bc5d8d11e5c5572d05da502f554636f2acea43acf688b0964a78ec9549fe6307
MD5 f515dca9abf003b7ed5b3952c494477f
SHA1 205319e0441f96c60275dec97adb510c445a37b4
SHA512 85a0053381fcfe457971321b35a9e9945a0711f6dbc5dcc8fdf539db913380d801ea98570e5ce0b32d32fa0ddeb4e61bf91d81bbb89331a5948f53e13b5da233
SSDEEP 3072:Te76WQSonyZ2Fdldab8ccTb8cc65ZMfTiu66I3UwqSsMBlsWb4A+P:SeWQSonyZ2Fdldab8ccTb8ccMMfTinqP
TLSH
T1511428727FAAF1A5CB541239AD1B7E83DE107C4B3C99CD767A6015B24129EF50C8B0A3
MD5 SHA1 SHA512 SSDEEP TLSH