cosmu | b818c443585bdd1fb747876028606fa2d7fba73956886ddb5514bfb00e5dbfc0

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
16/04/2026, 02:56

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General

Target
2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
Size 392KB
Sample260416-dff7kaew7p
SHA256 b818c443585bdd1fb747876028606fa2d7fba73956886ddb5514bfb00e5dbfc0
MD5 ee075a0aa73ffa6faf0484fb18d3a839
SHA1 c793b67f824359d5212d9d3e633f9f382dcfcaa4
SHA512 c4079dcebcfe4a3efc222904718280b2c21a0a4bcab80cbc57d7a09e2fd780da8309473c29d865e647f200543cfb285a029ed35c5d4dcc07efc53e3ff00ccf16
SSDEEP 3072:npWp6qbFBWN6wcUeGNqGdBBUhSfiK7HozIzPHvG4s6yW2UI54KC0bA/:g1HvUfBvKhoTSC
TLSH
T1F484D97C117BA2C7C8509BF0B9D2D8A94A14BD27D8642D681BACE365E3D122F740D2F7
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/5008-0-0x0000000000400000-0x0000000000409D5C-memory.dmp	family_cosmu
behavioral1/files/0x001400000001f0bb-2.dat	family_cosmu
behavioral1/files/0x000700000001e6cc-6.dat	family_cosmu
behavioral1/memory/5008-514-0x0000000000400000-0x0000000000409D5C-memory.dmp	family_cosmu

Detects executables packed with eXPressor 4 IoCs

resource	yara_rule
behavioral1/memory/5008-0-0x0000000000400000-0x0000000000409D5C-memory.dmp	INDICATOR_EXE_Packed_eXPressor
behavioral1/files/0x001400000001f0bb-2.dat	INDICATOR_EXE_Packed_eXPressor
behavioral1/files/0x000700000001e6cc-6.dat	INDICATOR_EXE_Packed_eXPressor
behavioral1/memory/5008-514-0x0000000000400000-0x0000000000409D5C-memory.dmp	INDICATOR_EXE_Packed_eXPressor

Renames multiple (4190) 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\7.0.16\System.Threading.Tasks.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Client\vcruntime140.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_Trial-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019XC2RVL_MAKC2R-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Threading.ThreadPool.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ComponentModel.Primitives.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.Drawing.Primitives.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.ValueTuple.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\fr\PresentationCore.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Internet Explorer\ieinstal.exe.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365SmallBusPremR_Subscription2-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\MSInfo\fr-FR\msinfo32.exe.mui.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\UIAutomationClient.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_MAK-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\PresentationFramework.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\javaws.exe.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusE5R_SubTrial-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteVL_MAK-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Trial-ppd.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\PRIVATE_ODBC32.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\7-Zip\7z.sfx.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\hr-HR\tipresx.dll.mui.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\ko\System.Windows.Forms.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\management\jmxremote.password.template.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Excel2019VL_MAK_AE-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Document Themes 16\Theme Fonts\Tw Cen MT.xml.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\PSRCHLTS.DAT.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Security.Cryptography.ProtectedData.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\PresentationUI.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\flavormap.properties.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\PersonalR_Grace-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_OEM_Perp-ppd.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\StandardMSDNR_Retail-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\WordR_Retail-ul-phn.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-libraryloader-l1-1-0.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\accessibility.properties.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremR_Grace-ppd.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.Pipes.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\es\UIAutomationClient.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\ext\jaccess.jar.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\jvm.hprof.txt.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\OneNoteR_Trial-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\VisioPro2019R_Retail-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_Retail-ppd.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProPlus2019R_OEM_Perp3-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jdk-1.8\jre\bin\ssv.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Java\jre-1.8\lib\jsse.jar.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\rtscom.dll.mui.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\tr\System.Windows.Forms.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hans\UIAutomationClientSideProviders.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\ClientPreview_eula.txt.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Spatial.NetFX35.V7.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\7-Zip\7zG.exe.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365BusinessR_Subscription-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\Professional2019R_Grace-ppd.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdCO365R_SubTest-pl.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\StandardVL_KMS_Client-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\ink\de-DE\TabTip.exe.mui.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\cs\WindowsBase.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Licenses16\O365ProPlusR_SubTrial3-ul-oob.xrm-ms.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Microsoft Office\root\Office16\1033\ClientSub_M365_eula.txt.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\Common Files\microsoft shared\OFFICE16\Office Setup Controller\pkeyconfig.companion.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\pl\UIAutomationTypes.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
File created	C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\zh-Hant\System.Windows.Forms.resources.dll.tmp	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_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	2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe

C:\Users\Admin\AppData\Local\Temp\2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-04-16_ee075a0aa73ffa6faf0484fb18d3a839_elex_wannacry.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:5008

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-1-5-21-914486190-3969805341-592249730-1000\desktop.ini.tmp
Size 392KB
SHA256 e9f149ec703494fa50807b5d08051f4aea85e2542542f3a9e7b0215025d9db38
MD5 cffcfa53fb56040918bd8deb14e8ba6c
SHA1 ccc5f514ce65b4d46b0feeb4acc793be18dfb6c2
SHA512 892d2688815cbd4100443755c85cbcca934fcc80a534f15c97ab0cf7c6e727d178e17a14edd860a1d60f74a9ff34ed994730a48ffcf36b07e954a75b615f24e0
SSDEEP 3072:npWp6qbFBWN6wcUeGNqGdBBUhSfiK7HozIzPHvG4s6yW2UI54KC0bAV:g1HvUfBvKhoTS0
TLSH
T1E684D97C117BA2C7C8509BF0B9D2D8A94A14BD27D8642D681BACE365E3D122F740D2F7
MD5 SHA1 SHA512 SSDEEP TLSH

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7-zip.dll.tmp

Path C:\Program Files\7-Zip\7-zip.dll.tmp
Size 491KB
SHA256 dc74ce1c78b3161b74686b91f606ae953d3f0a0e36a3305c0b4d6d151eb1f1d7
MD5 c2a3ae14d023270530bfb119ebec5e1e
SHA1 12abf3997c3b83e19c2b674b74d061ab00bbba05
SHA512 93b83ac4c121488311917c53b9d4feb835209e61f9cbfb65ded784a338f5e79f27bdfc3f9f3dbbe6ea50b8c9de60e9353aeef4da6b76e92e2188e4b636d5a2c0
SSDEEP 3072:npWp6qbFBWN6wcUeGNqGdBBUhSfiK7HozIzPHvG4s6yW2UI54KC0bA75ZMfTiu6R:g1HvUfBvKhoTSqMfTinqncsWp+W
TLSH
T1F3B44D68117FE2D7C9409BF0B9D3DCAA4A10BD279C645D2527AC9366E3D122F680D2F3
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/5008-1357-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-514-0x0000000000400000-0x0000000000409D5C-memory.dmp

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memory/5008-513-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-835-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-0-0x0000000000400000-0x0000000000409D5C-memory.dmp

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memory/5008-1875-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-3529-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-3831-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-4323-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-4880-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-5861-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-7097-0x0000000002090000-0x000000000214F000-memory.dmp

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memory/5008-8315-0x0000000002090000-0x000000000214F000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads