cosmu | d6b922a1d0a6eda6920e0a5d6dc478cfffef1cbe7b6c042721b3c375ac1c8cc2

Analysis

max time kernel
150s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20260911-en
resource tags

arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
24/10/2026, 22:57

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General

Target
2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
Size 980KB
Sample261024-2xdprsew7p
SHA256 d6b922a1d0a6eda6920e0a5d6dc478cfffef1cbe7b6c042721b3c375ac1c8cc2
MD5 045301a8b0166221520cf0e9a0a7c431
SHA1 da5c1238abe51443df73d79ad69dea50223e3d57
SHA512 1750d4c7f2d4e0e756ccd352b9caa560a5554d240a4582e714352366a36706e02a0cc42d12efb176f3afe3582d195d00d0d162a26325c8a149df771dab0b6f45
SSDEEP 24576:GFqje6yrOtkQuF5bjtzQWwN0t+l+Lp0rlK+Rl:GFxrOmQuF5bjtzQWwNC+l+Lp0rlK+Rl
TLSH
T1E4254D5D2B63EAF1F3D896354DA7C55CCC27430EAD24603CE0B61A36B39DE78E824196
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 4 IoCs

Cosmu is a worm written in C++.

resource	yara_rule
behavioral1/memory/1044-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral1/files/0x000a00000002434f-2.dat	family_cosmu
behavioral1/files/0x000200000001e672-5.dat	family_cosmu
behavioral1/memory/1044-592-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Detects executables packed with eXPressor 4 IoCs

resource	yara_rule
behavioral1/memory/1044-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral1/files/0x000a00000002434f-2.dat	INDICATOR_EXE_Packed_eXPressor
behavioral1/files/0x000200000001e672-5.dat	INDICATOR_EXE_Packed_eXPressor
behavioral1/memory/1044-592-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

Renames multiple (2321) 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\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pl\ReachFramework.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\UIAutomationClientSideProviders.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\de-DE\msadcer.dll.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\msadds.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.NameResolution.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\Microsoft.VisualBasic.Forms.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework.AeroLite.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\ja-JP\msadcor.dll.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Linq.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.Primitives.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\DirectWriteForwarder.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\fr\PresentationCore.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.hu-hu.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Memory.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Runtime.Extensions.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\cs\System.Windows.Controls.Ribbon.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ja\UIAutomationClientSideProviders.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-processthreads-l1-1-0.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\pt-BR\System.Xaml.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\StreamServer.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert.xml.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\host\fxr\8.0.15\hostfxr.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.XmlSerializer.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\hr.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\pkcs11wrapper.md.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\ta.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Xml.Linq.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\ru\System.Windows.Controls.Ribbon.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\WindowsFormsIntegration.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\si.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Reflection.DispatchProxy.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\PresentationFramework-SystemCore.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework-SystemXmlLinq.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Google\Chrome\Application\140.0.7339.81\Locales\sv.pak.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\j2pkcs11.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\THIRDPARTYLICENSEREADME-JAVAFX.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Primitives.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\tr\UIAutomationClient.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\ku-ckb.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fr-FR\InputPersonalization.exe.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\TipRes.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Numerics.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\WindowsFormsIntegration.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\System.Windows.Input.Manipulations.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\mk.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\de-DE\msdaremr.dll.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\Ole DB\en-US\sqlxmlx.rll.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Emit.Lightweight.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.ServicePoint.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\Microsoft.VisualBasic.Forms.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\System.Xaml.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\System.Windows.Forms.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\mn.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\de-DE\msadcor.dll.mui.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Reflection.Primitives.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ServiceProcess.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\ar.txt.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\fr\WindowsFormsIntegration.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationProvider.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\System.Windows.Forms.Design.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\server\classes.jsa.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hant\WindowsBase.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Security.Cryptography.Pkcs.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\PresentationUI.resources.dll.tmp	2026-10-22_045301a8b0166221520cf0e9a0a7c431_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	2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-22_045301a8b0166221520cf0e9a0a7c431_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1044

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-1-5-21-1846164713-4096795028-774071693-1000\desktop.ini.tmp
Size 980KB
SHA256 735e3907310064117b3f9e051465a4ab4273fe65704dd93ed581ff82c0c447e9
MD5 a1dd2ae4d5dfc84609be039e2d604fdb
SHA1 e7cb62aa31b8944984aa49808e597eac7178a695
SHA512 9d6f8d789d23581b270ff0ce18cb0ca4a7530fbcdbf545a6e015e31a0b205dc5937a865c70637996a6dee7b44a79728a21f29c601a8891ad91bd86039ffa9f19
SSDEEP 24576:GFqje6yrOtkQuF5bjtzQWwN0t+l+Lp0rlK+RP:GFxrOmQuF5bjtzQWwNC+l+Lp0rlK+RP
TLSH
T1A8254D5D2B63EAF1F3D896354DA7C55CCC27430EAD24603CE0B61A36B39DE78E824196
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

7-zip.chm.tmp

Path C:\Program Files\7-Zip\7-zip.chm.tmp
Size 1.1MB
SHA256 aa98db4b3d6bf93e1b477e95e97702eddae1fdadb2015d746ea47971e03aecad
MD5 57096a2c34bef6420111b178f078d0ec
SHA1 d7b35d2065d9a222b0298f5ac077e20da08911c0
SHA512 4a1b9c7f75ea7498979472f32fd9073586ee0bfdfb6de1a43bceb5e0d187d92765a0766117a2b0a938997e0c9af2a5a77d845a187335093dea572a9f9d193900
SSDEEP 24576:GFqje6yrOtkQuF5bjtzQWwN0t+l+Lp0rlK+RgwGt:GFxrOmQuF5bjtzQWwNC+l+Lp0rlK+Rgn
TLSH
T139356D5D2B63EAF1F3D896354D97C55CCC27430EAD24603CE0B61A36B3ADE78E824196
MD5 SHA1 SHA512 SSDEEP TLSH