cosmu | 9f05792f612398b55c9156ec6ad0426ae91dd1dc3fb298e04062928a0e3019a0

Analysis

max time kernel
150s
max time network
125s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260911-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
20/10/2026, 02:25

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General

Target
2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
Size 25KB
Sample261020-cwjf7aac89
SHA256 9f05792f612398b55c9156ec6ad0426ae91dd1dc3fb298e04062928a0e3019a0
MD5 fb23c85c24d861257cfbb343b13ad3e4
SHA1 2d9dcfb4ddc354535e64e06592d640085cf84666
SHA512 7a79790c150ed42d4e06cbc301e572530da153fccfb10c557a8ad689269a0782316a03139bf77729bf4a40c092d72d9e6b7686a6a9a9c149440e71b3f9ce1b4d
SSDEEP 384:hBt7Br5xjL9AgA71Fbhv/r+k7ha3azpsVvUaWq9C7:R7BlpppARFbh6qjpim2
TLSH
T195B24B5E8B49C072C38550305D2F687DDCB7443CAE26DB6BAB56CC18AAB63D0FC3815A
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/1652-0-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu
behavioral2/files/0x000700000001b85c-2.dat	family_cosmu
behavioral2/files/0x000300000000039f-5.dat	family_cosmu
behavioral2/memory/1652-794-0x0000000000400000-0x000000000040A000-memory.dmp	family_cosmu

Custom signature

Detects executables packed with eXPressor 4 IoCs

resource	yara_rule
behavioral2/memory/1652-0-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral2/files/0x000700000001b85c-2.dat	INDICATOR_EXE_Packed_eXPressor
behavioral2/files/0x000300000000039f-5.dat	INDICATOR_EXE_Packed_eXPressor
behavioral2/memory/1652-794-0x0000000000400000-0x000000000040A000-memory.dmp	INDICATOR_EXE_Packed_eXPressor

Renames multiple (4866) 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\6.0.27\es\UIAutomationTypes.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\UIAutomationClient.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-crt-convert-l1-1-0.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\bin\schemagen.exe.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.Pipes.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\System.Windows.Forms.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\PresentationFramework.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\security\blacklisted.certs.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\keytool.exe.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\ext\sunpkcs11.jar.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\hijrah-config-umalqura.properties.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019DemoR_BypassTrial180-ul-oob.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.ComponentModel.Annotations.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\ja\System.Windows.Controls.Ribbon.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Internet Explorer\it-IT\iexplore.exe.mui.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-profile-l1-1-0.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProfessionalR_Trial-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\ONINTL.DLL.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\GostTitle.XSL.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\CONVERT\OLADD.FAE.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\7-Zip\7zCon.sfx.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\ka.txt.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Net.WebSockets.Client.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Net.ServicePoint.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-001B-0409-1000-0000000FF1CE.xml.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Outlook2019R_Retail-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioProCO365R_SubTrial-ul-oob.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Xml.ReaderWriter.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Threading.Tasks.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\System.DirectoryServices.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Google\Chrome\Application\140.0.7339.81\libGLESv2.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\lib\fontconfig.bfc.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Trial-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Retail-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Standard2019R_Grace-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Grace-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\GRAPH_K_COL.HXK.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\PROTOCOLHANDLERINTL.DLL.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\FORMS\1033\SCDRESNL.ICO.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\FORMS\1033\TASKACCS.ICO.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.pt-br.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PowerPointR_OEM_Perp-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Grace-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019XC2RVL_MAKC2R-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Publisher2019R_Trial-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\FORMS\1033\SCHDREST.CFG.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ru\PresentationCore.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Diagnostics.EventLog.Messages.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_Retail-ppd.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\Bibliography\Author2XML.XSL.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\ado\msado20.tlb.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\7-Zip\Lang\ast.txt.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\ado\ja-JP\msader15.dll.mui.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\de\WindowsBase.resources.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-file-l1-1-0.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\AccessR_Grace-ul-oob.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\HomeStudentR_Retail-pl.xrm-ms.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\QuickStyles\linessimple.dotx.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\PowerPivot Excel Add-in\Microsoft.ReportingServices.ReportDesign.Forms.dll.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Common Files\System\Ole DB\de-DE\sqlxmlx.rll.mui.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\javafx\jpeg_fx.md.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\legal\jdk\xmlresolver.md.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-3101-0000-1000-0000000FF1CE.xml.tmp	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_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	2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-10-20_fb23c85c24d861257cfbb343b13ad3e4_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1652

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-1-5-21-1262770251-41185387-1005173349-1000\desktop.ini.tmp
Size 25KB
SHA256 14babfff06dd8e88f220ead6e59b86b701c1ef1fbddb7c3bf578136ad4ba9fe0
MD5 e8302a2e5c9bd04a147027ce50b85ba5
SHA1 9e2de66935b619770c64ad00a4d75433b28a9f50
SHA512 f7ffcdde1a88a8886b959b4bd7b33648a9e8fb9a7fe5b53ff3e40b5db54cbba95b84ca77369842c2e7bc38caff27ca89822dfe9f32e1e4dfb84860ff383b53c6
SSDEEP 384:hBt7Br5xjL9AgA71Fbhv/r+k7ha3azpsVvUaWq9C7K:R7BlpppARFbh6qjpim2B
TLSH
T1CCC25C5E8B49C032C38550346D2F687DDCB7443CAE26DB67EB568C18AAB63D1FC3815A
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

7-zip.chm.tmp

Path C:\Program Files\7-Zip\7-zip.chm.tmp
Size 142KB
SHA256 da1791ef5bc2bf845aa372d063a144a2eb00b0916014e98a22a2aa0cf3d9e8e3
MD5 a94a44396435d0e8cd57b7cd927ef903
SHA1 800a705883071d7f4c0f000d39919e3ea51b28b3
SHA512 410ece0e15e873ec2550c10c05fb6e523196744e2d466d6d8718ac5240c70f63315f32e7de23e751b27320bdee917cbd35eb4104b1b0f5ade6cb162dca09e06e
SSDEEP 3072:7pWp6qjAwxMxdrwdaEMePCUlZVpnwzuGSsOOOC:0hAwxMxFELMO9wapsOZC
TLSH
T11BE3026A67845422C74601382253E83E77B32C691D15CB527F8BCE0E6BF67D9F43922B
MD5 SHA1 SHA512 SSDEEP TLSH