cosmu | 7baeca637334b01d3045d03fd7755f9fe89afc7951759f5bb38b69d1c7bb9f21

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
22/07/2026, 23:34

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General

Target
2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
Size 63KB
Sample260722-3kl12ssxas
SHA256 7baeca637334b01d3045d03fd7755f9fe89afc7951759f5bb38b69d1c7bb9f21
MD5 95416b1b6aa92b4a67d1c610640310c1
SHA1 60d60ae7a09d2288ee29cad1084ba6b139d191f8
SHA512 67eb2d5bc7dc5188f3e4a1a8796f43434451f5668be29feda48fee42f79471f9fe3130d1e8fef33318bb7c0316eb37ad781799e7b077c99ba0a8ce03aeb39a81
SSDEEP 768:KI7BlphA7UbSrbhSK0s7OuU2NxAONxA/od+Zbtsmxmgq:z7ZhA7FSFgC2N2ON28mxmgq
TLSH
T173538E2E3A19D9F2D26D02705467B4BCC8737424BEB0FED293667D781562B908428A2F
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
behavioral2/memory/4380-0-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu
behavioral2/files/0x001b0000000187a6-2.dat	family_cosmu
behavioral2/files/0x000300000001b1a7-6.dat	family_cosmu
behavioral2/memory/4380-557-0x0000000000400000-0x0000000000408000-memory.dmp	family_cosmu

Renames multiple (4337) 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\tr\System.Windows.Controls.Ribbon.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\7-Zip\History.txt.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Design.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.SqlServer.Configuration.SString.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\PresentationCore.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\fonts\LucidaSansRegular.ttf.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\offsymb.ttf.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Data.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\jfr\default.jfc.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001B-0000-1000-0000000FF1CE.xml.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProMSDNR_Retail-pl.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.AnalysisServices.Layout.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\Microsoft.VisualBasic.Forms.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_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	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Internet Explorer\SIGNUP\install.ins.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\legal\javafx\directshow.md.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pt-BR\System.Windows.Forms.Primitives.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\msvcp140.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\tnameserv.exe.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001F-0C0A-1000-0000000FF1CE.xml.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Retrospect.thmx.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019VL_MAK_AE-ul-phn.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\Microsoft.CSharp.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\UIAutomationClientSideProviders.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationFramework.Aero2.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteVL_KMS_Client-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPoint2019R_Retail-ppd.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.Http.Json.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\joni.md.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\oskmenu\oskmenubase.xml.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Net.WebSockets.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\System.Windows.Forms.Primitives.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectProR_Retail-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sk-sk.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\msadc\ja-JP\msadcor.dll.mui.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Reflection.Emit.ILGeneration.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Reflection.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp2-ppd.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudent2019R_Trial-ppd.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_PrepidBypass-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\fr-FR\tipresx.dll.mui.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\MSInfo\en-US\msinfo32.exe.mui.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ObjectModel.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\PresentationUI.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\System.Windows.Controls.Ribbon.resources.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\README.txt.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\MondoR_Subscription2-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial2-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.IO.FileSystem.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Grace-ul-oob.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\OMSINTL.DLL.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.uk-ua.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\kok-IN\tipresx.dll.mui.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Collections.NonGeneric.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\legal\jdk\zlib.md.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_OEM_Perp4-pl.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.Diagnostics.Tracing.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeBusinessR_Retail-ppd.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_SubTrial5-pl.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\UIAutomationTypes.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_SubTrial1-pl.xrm-ms.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOLoaderUI.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\VSTO\10.0\VSTOLoader.dll.tmp	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_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	2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-07-22_95416b1b6aa92b4a67d1c610640310c1_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:4380

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

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Downloads

desktop.ini.tmp

Path C:\$Recycle.Bin\S-1-5-21-1079202589-886135813-2527035092-1000\desktop.ini.tmp
Size 63KB
SHA256 e4ace1464315f81c38b85d09b4f2c518dc9ad803705260ab4141729bf24a1e4f
MD5 16e14c670fb5e5b95f1f24e10a51d8c8
SHA1 8c6cfb5535f9b1055adfbfc42a4c00ebbfaf8071
SHA512 5c69956ed03be58d27bce2e7604096b6398965c1127705debdb47bbedfe51a426f38efee48ecbb2ed08238755d3695a56a46668d07af9d518bbad9e7d047cf6c
SSDEEP 768:KI7BlphA7UbSrbhSK0s7OuU2NxAONxA/od+ZbtsmxmgU:z7ZhA7FSFgC2N2ON28mxmgU
TLSH
T1C9538E2E3A29D9F2D26D02705467B4BCC8337424BE70FFD6D7667D781561B90842862F
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

7-zip.dll.tmp

Path C:\Program Files\7-Zip\7-zip.dll.tmp
Size 162KB
SHA256 46bd82c2098f8e19f9d1149f36c9190c56881ef3027c3f28a7c59a7c80395d43
MD5 f18bce6e4694dfbbe3e327312d51601a
SHA1 3a710134e0b5f4ffe2e94cb4b134953e8e14bf24
SHA512 784fbaaa39a63c075584d65c268d21f8cedfe1cab01b33809ec6e59e3f8e60438286a914b2ccc424bc46fc8c10102cbc8693c28722e9a76fe237547929fb4de1
SSDEEP 3072:Re7F6P2N2ON2r5ZMfTiu66I3UwqSsMBlsWb4A+T:0FjiMfTinqncsWp+T
TLSH
T1D1F307607CAEF6A0CB4813796D5BAE87C205398B3C59CE8276B535E3913CD910C9B4E7
MD5 SHA1 SHA512 SSDEEP TLSH