cosmu | a07648b36af40d15718a6b97f61fdf382e22feb758657f524110312d1dfefc6e

Analysis

max time kernel
150s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260710-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
27/07/2026, 20:05

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
Size 84KB
Sample260727-yt22eada52
SHA256 a07648b36af40d15718a6b97f61fdf382e22feb758657f524110312d1dfefc6e
MD5 71163fdab9f0ffc4c14a8cce9a413761
SHA1 b580d8ed6680d8f7cd584e8234b51553174c9460
SHA512 10fc3e25b74878fac103702e4191e27dae5e68082f6c1ad8b263411c46ec2b207c2e4a3e92728127a6be119932d4160dd24f22135725d16324eac70f2ad019ed
SSDEEP 1536:W7ZhA7pApvOsOKjC0YSilpFpfkJOM2kJOMIsKsc696xZXs0:6e7WpXYvndbs0
TLSH
T1CB834CAF0B21E856DB5332F4A013587D81B86441DDB47DF4B6A0BB382421EF950DAE9F
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/0x000700000001b858-1.dat	family_cosmu
behavioral2/files/0x000400000001b1b2-5.dat	family_cosmu

Renames multiple (4296) 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.NETCore.App\8.0.15\System.Runtime.CompilerServices.Unsafe.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ru\System.Windows.Input.Manipulations.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\JAWTAccessBridge-64.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_Trial-ul-oob.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-pl.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlusR_Trial-pl.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Xml.XmlSerializer.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_OEM_Perp-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019R_PrepidBypass-ul-oob.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-core-string-l1-1-0.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Private.DataContractSerialization.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Forms.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\jjs.exe.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Subscription2-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OutlookVL_MAK-ul-phn.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\EXCEL_COL.HXC.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\PresentationCore.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\gstreamer-lite.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Colors\Blue.xml.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_SubTrial-ul-oob.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\api-ms-win-crt-process-l1-1-0.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Windows.Presentation.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\wpfgfx_cor3.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTest1-ul-oob.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteVL_KMS_Client-ul.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdXC2RVL_MAKC2R-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\api-ms-win-crt-time-l1-1-0.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebHeaderCollection.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Security.Cryptography.Csp.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ReachFramework.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail3-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProMSDNR_Retail-pl.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Drawing.Primitives.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\it\PresentationCore.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\MergeImport.php.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ExcelVL_MAK-pl.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioStdO365R_SubTest-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Resources.ResourceManager.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\bin\kinit.exe.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Subscription3-ppd.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.Container.NetFX40.exe.config.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\zh-Hans\System.Xaml.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\System.Windows.Forms.Design.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Consolas-Verdana.xml.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.Excel.ReportingServices.DataExtensions.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.XDocument.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\fr-FR\msdaprsr.dll.mui.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\System.Windows.Forms.Primitives.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\calendars.properties.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PublisherR_OEM_Perp-ul-phn.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\linesdistinctive.dotx.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.tr-tr.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Formats.Tar.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.Drawing.Common.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pl\PresentationUI.resources.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusiness2019R_OEM_Perp4-ul-phn.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Retail-ul-phn.xrm-ms.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\PROTTPLN.PPT.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\EduWorks Data Streamer Add-In\System.ValueTuple.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Xml.ReaderWriter.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\WindowsBase.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\VVIEWRES.DLL.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Power Map Excel Add-in\MICROSOFT.DATA.RECOMMENDATION.COMMON.DLL.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ComponentModel.EventBasedAsync.dll.tmp	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_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	2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-27_71163fdab9f0ffc4c14a8cce9a413761_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4744

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

Loading Replay Monitor...

Downloads

desktop.ini.tmp

Path C:\$Recycle.Bin\S-1-5-21-2301830172-776172150-2531349243-1000\desktop.ini.tmp
Size 84KB
SHA256 2c35d8afc04d0e2b8a07de368483ad6f13bf7d2238168ccb9c363846e5955170
MD5 8f39a51504f5cdc30593539b609729c6
SHA1 0fa0546b121b221f6658a7d2623e8fd588fc69d7
SHA512 8baba745ebf4bdfbaec128ec094a90c3d77d4047d575218cf4a6233d02769f5adf1639a3620775bce9fb434d83bc7bfe4c29d964ecd48ecbf2db3021a4941eda
SSDEEP 1536:W7ZhA7pApvOsOKjC0YSilpFpfkJOM2kJOMIsKsc696xZXs2:6e7WpXYvndbs2
TLSH
T1A9834BAF0B21E866DB5332F4A013587D81786441DDB47DE4F6A0BB382421EF950DAE9F
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

7-zip.dll.tmp

Path C:\Program Files\7-Zip\7-zip.dll.tmp
Size 183KB
SHA256 f9ff67345f78fedf893119af34184818c8c3b61b409b984a387adb9ae93e7b0b
MD5 0c460805f9967040b4aff4687e5594bc
SHA1 59a0057e57d6c4a9be987df941aaf865b27c2149
SHA512 ad3d9ebd486e5c922f40922e97c9ef83e3fa99b9f457bc25c1d4052aa691824b27f7c9dd6769889cdb3120f91d5fc3446df932d6451100f29e63d6c9a6457c35
SSDEEP 3072:6e7WpXYvndbsv5ZMfTiu66I3UwqSsMBlsWb4A+l:RqRSaMfTinqncsWp+l
TLSH
T1CA0429613D6AF560CF4432B9A8135D8FC214398BBC59FD91B6B036B31139DE5089B8EB
MD5 SHA1 SHA512 SSDEEP TLSH