Analysis Overview
SHA256
a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8
Threat Level: Known bad
The file a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8 was found to be: Known bad.
Malicious Activity Summary
Cosmu family
Cosmu
Detects Cosmu payload
Renames multiple (5050) files with added filename extension
Reads user/profile data of web browsers
Executes dropped EXE
Drops file in System32 directory
Drops file in Program Files directory
System Location Discovery: System Language Discovery
Unsigned PE
Browser Information Discovery
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V16
Analysis: static1
Detonation Overview
Reported
2025-07-01 06:58
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2025-07-01 06:58
Reported
2025-07-01 07:01
Platform
win10v2004-20250610-en
Max time kernel
150s
Max time network
139s
Command Line
Signatures
Cosmu
Cosmu family
Detects Cosmu payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (5050) files with added filename extension
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\Zombie.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe | N/A |
Reads user/profile data of web browsers
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\Zombie.exe | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\Zombie.exe | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\it\UIAutomationProvider.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\en-US\micaut.dll.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Security.SecureString.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\8.0.15\System.IO.UnmanagedMemoryStream.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Google\Chrome\Application\133.0.6943.60\VisualElements\SmallLogoDev.png.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\images\cursors\invalid32x32.gif.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Excel2019R_Trial-pl.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\ipsnld.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\dicjp.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\PackageManifests\AppXManifest.90160000-0090-0409-1000-0000000FF1CE.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\SkypeServiceBypassR_PrepidBypass-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\WordVL_KMS_Client-ul.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\api-ms-win-core-timezone-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\it\ReachFramework.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\PresentationCore.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\System.Windows.Forms.Primitives.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\lib\security\cacerts.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\MondoVL_KMS_Client-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectStd2019R_OEM_Perp-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioStd2019R_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\MSIPC\es\msipc.dll.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\System.Windows.Forms.Design.Editors.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\StandardR_Retail-ul-phn.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\ADDINS\Microsoft Power Query for Excel Integrated\bin\Microsoft.Mashup.OleDbInterop.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\main\base_heb.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\VSTO\10.0\1033\VSTOLoaderUI.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\es\WindowsBase.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioProVL_KMS_Client-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\InstallerMainShell.tlb.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\OneNote\SendToOneNote.ini.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.sk-sk.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\insert\insertbase.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\cs\System.Windows.Controls.Ribbon.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\plugin2\vcruntime140.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\ExcelLogoSmall.scale-100.png.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\LogoImages\PowerPntLogo.scale-140.png.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\pt-BR\PresentationFramework.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectStdR_OEM_Perp-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\Bibliography\Style\GostTitle.XSL.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\de\WindowsBase.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hant\UIAutomationProvider.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\ProjectPro2019VL_KMS_Client_AE-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\FPA_f3\FA000000003.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Configuration.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\8.0.15\zh-Hans\System.Windows.Input.Manipulations.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\bin\api-ms-win-core-libraryloader-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\README.txt.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\lib\ir.idl.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\VisioProO365R_SubTrial-ppd.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\ipsplk.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\ipssrl.xml.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\mshwjpn.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.27\System.Runtime.Serialization.Json.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.NETCore.App\7.0.16\System.ServiceProcess.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\7.0.16\tr\UIAutomationClientSideProviders.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\bin\api-ms-win-core-namedpipe-l1-1-0.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\Access2019R_OEM_Perp-pl.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jdk-1.8\jre\bin\javacpl.cpl.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Java\jre-1.8\lib\security\java.security.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Licenses16\O365HomePremDemoR_BypassTrial365-ul-oob.xrm-ms.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\PSRCHPHN.DAT.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Microsoft Office\root\Office16\1033\WacLangPackEula.txt.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\Common Files\microsoft shared\ink\sl-SI\tipresx.dll.mui.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
| File created | C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App\6.0.27\es\UIAutomationClient.resources.dll.tmp | C:\Windows\SysWOW64\Zombie.exe | N/A |
Browser Information Discovery
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\Zombie.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 5284 wrote to memory of 1096 | N/A | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | C:\Windows\SysWOW64\Zombie.exe |
| PID 5284 wrote to memory of 1096 | N/A | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | C:\Windows\SysWOW64\Zombie.exe |
| PID 5284 wrote to memory of 1096 | N/A | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | C:\Windows\SysWOW64\Zombie.exe |
| PID 5284 wrote to memory of 620 | N/A | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe |
| PID 5284 wrote to memory of 620 | N/A | C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe | C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe
"C:\Users\Admin\AppData\Local\Temp\a036531f169d10e473e89306c21fba364a8e50b209abb4388e3395cc6aa33be8.exe"
C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe
"_AcroServicesUpdater2_x64.exe"
C:\Windows\SysWOW64\Zombie.exe
"C:\Windows\system32\Zombie.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 150.171.27.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 150.171.28.10:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | c.pki.goog | udp |
| GB | 142.250.179.227:80 | c.pki.goog | tcp |
Files
C:\Users\Admin\AppData\Local\Temp\_AcroServicesUpdater2_x64.exe
| MD5 | aba284c3712f8cdb2fdc70689933a909 |
| SHA1 | e836d2554ff9043605d333eace443b95c5ceb55d |
| SHA256 | 99727a25e431134f75c9342ca608d1007ea31733f7fd4dda32356e5e36c23f9b |
| SHA512 | 217ab6bfff758b1137aadaa9878727493e3efe5a72412bd4eedcb538854c5e25dcad17c7446443174b0e2ab695a9dbf7c7b67c86c89fd48055c04c2e10dfecd4 |
C:\Windows\SysWOW64\Zombie.exe
| MD5 | 571e4f97273e546b32b4ef5bbfe6e89e |
| SHA1 | 3186d27db5e8412e9f20ec3def0720f779a41f09 |
| SHA256 | 112476057a328b07cc8758f2869a348c7bd6e8aba8bd5b44585322dd8381f089 |
| SHA512 | 112af1cc986dd2a8aa0c0ec5fc7408b2b112e7282b5a3773badd4c69d409c590189dccc3904c43a910239dad18a60cca646a24d1baf2e9b383f7f734f6f4c272 |
C:\$Recycle.Bin\S-1-5-21-2012121138-1878458325-808874697-1000\desktop.ini.exe
| MD5 | 8fd9e66a936f71ebbe2ee28d4cc5f8c8 |
| SHA1 | fe4d9f2482ea0b2d5dcd0d82751759f3036adcee |
| SHA256 | 1cbf09115c52d6376a3ad8ef3a3a0425a4bf71b58a5f0aec8e5aba545fa118a9 |
| SHA512 | c13ad69b28480ae699a23c167c3315d74a54132670c85070c3acf05c840e3c44637a5781babb694cd4b6fb35baaf33942c98a209428227c82002b96804c163c5 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\LN2KZ60H\S3[1].htm
| MD5 | c83301425b2ad1d496473a5ff3d9ecca |
| SHA1 | 941efb7368e46b27b937d34b07fc4d41da01b002 |
| SHA256 | b633a587c652d02386c4f16f8c6f6aab7352d97f16367c3c40576214372dd628 |
| SHA512 | 83bafe4c888008afdd1b72c028c7f50dee651ca9e7d8e1b332e0bf3aa1315884155a1458a304f6e5c5627e714bf5a855a8b8d7db3f4eb2bb2789fe2f8f6a1d83 |
memory/5284-313-0x0000000000400000-0x0000000000407000-memory.dmp