Analysis

  • max time kernel
    150s
  • max time network
    157s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    13/09/2026, 10:31

General

  • Target
    2026-09-13_c675848d76ae6aabec2e0714db4c73ee_cloudeye_elex_wannacry.exe
  • Size 87.5MB
  • Sample260913-mkhevsfn2s
  • SHA256 992228d01288155f2e89988e807e178d977112f28840065d67709b4cb6ee6baa
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: DonutLoader

    DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

  • Family: ValleyRat

    ValleyRat stage2 is a backdoor written in C++.

  • Detects DonutLoader 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 7 IoCs
  • Badlisted process makes network request 1 IoCs

    Network request originating from process or tool commonly abused by malware.

  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 12 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies trusted root certificate store through registry 1 TTPs 2 IoCs

    A root certificate was added, modified, or removed in the trusted certificate store registry paths.

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Inno Setup is an open-source installation builder for Windows applications. 4 IoCs

    Inno Setup installer

  • Modifies data under HKEY_USERS 52 IoCs
  • Modifies registry class 26 IoCs
  • Modifies system certificate store 2 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-09-13_c675848d76ae6aabec2e0714db4c73ee_cloudeye_elex_wannacry.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-09-13_c675848d76ae6aabec2e0714db4c73ee_cloudeye_elex_wannacry.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4312
    • C:\Windows\SysWOW64\cscript.exe
      cscript.exe /nologo "C:\Users\Admin\AppData\Roaming\MeiQia\adddf.vbe" C:\
      2⤵
      • Executes a VBScript file via the Windows Script Host.
      • System Location Discovery: System Language Discovery
      PID:5004
    • C:\Users\Admin\AppData\Local\Temp\gentee8C\MeiqiaWinLatest.exe
      "C:\Users\Admin\AppData\Local\Temp\gentee8C\MeiqiaWinLatest.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      PID:5100
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 5100 -s 864
        3⤵
        • Program crash
        PID:4424
    • C:\Users\Admin\AppData\Local\Temp\gentee8C\cloudflared_installer.exe
      "C:\Users\Admin\AppData\Local\Temp\gentee8C\cloudflared_installer.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4160
      • C:\Users\Admin\AppData\Local\Temp\is-K8RE0.tmp\cloudflared_installer.tmp
        "C:\Users\Admin\AppData\Local\Temp\is-K8RE0.tmp\cloudflared_installer.tmp" /SL5="$3901BE,20802367,926208,C:\Users\Admin\AppData\Local\Temp\gentee8C\cloudflared_installer.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:5276
        • C:\Windows\SysWOW64\msiexec.exe
          "msiexec.exe" /i "C:\Users\Admin\AppData\Local\Temp\is-7G57L.tmp\cf.msi" /qn /norestart
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:4104
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 5100 -ip 5100
    1⤵
      PID:5708
    • C:\Windows\system32\msiexec.exe
      C:\Windows\system32\msiexec.exe /V
      1⤵
      • Badlisted process makes network request
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • Modifies data under HKEY_USERS
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2520
    • C:\ProgramData\Microsoft\System\System.exe
      "C:\ProgramData\Microsoft\System\System.exe" access tcp --url tcp://127.0.0.1:443 --hostname www.qccf2.cyou
      1⤵
      • Executes dropped EXE
      • Modifies trusted root certificate store through registry
      • Modifies data under HKEY_USERS
      • Modifies system certificate store
      PID:5892
    • C:\Windows\System32\rundll32.exe
      "C:\Windows\System32\rundll32.exe" C:\ProgramData\CfServerSoftwareDistribution\Guard.dll,pKYbXy2P
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:1392
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\System32\rundll32.exe" C:\ProgramData\CfServerSoftwareDistribution\Guard.dll,pKYbXy2P
        2⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        PID:1280
    • C:\ProgramData\CfServerSoftwareDistribution\WindowsEvent.exe
      "C:\ProgramData\CfServerSoftwareDistribution\WindowsEvent.exe"
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4320
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /run /tn WinSafe
        2⤵
        • System Location Discovery: System Language Discovery
        PID:4404
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe
      1⤵
        PID:568
      • C:\ProgramData\CfServerSoftwareDistribution\WindowsEvent.exe
        C:\ProgramData\CfServerSoftwareDistribution\WindowsEvent.exe
        1⤵
        • Executes dropped EXE
        PID:5208

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            e597894.rbs

            • Path C:\Config.Msi\e597894.rbs
            • Size 7KB
            • SHA256 243cf058ed4dc99867716637da0eaf9b38bcc0144f630a33c4274462090de8f7
            • MD5 SHA1 SHA512 SSDEEP TLSH

            Guard.dll

            • Path C:\ProgramData\CfServerSoftwareDistribution\Guard.dll
            • Size 142KB
            • SHA256 e10d7b68eb4a581171b208951c71bd88693809300b4845fcc06ced9ea9b40f06
            • MD5 SHA1 SHA512 SSDEEP TLSH

            WindowsEvent.exe

            • Path C:\ProgramData\CfServerSoftwareDistribution\WindowsEvent.exe
            • Size 103KB
            • SHA256 0e9812ab85d4ff6e9fcc00eb4a8be35a867bd99e082b17105d64b41fd5711b94
            • MD5 SHA1 SHA512 SSDEEP TLSH

            cloudflared_installer.exe

            • Path C:\Users\Admin\AppData\Local\Temp\gentee8C\cloudflared_installer.exe
            • Size 20.9MB
            • SHA256 9ac26859c5b48c4b85695adbca1f8881d7a881ffb0319dd091b974e91dec29a7
            • MD5 SHA1 SHA512 SSDEEP TLSH

            guig.dll

            • Path C:\Users\Admin\AppData\Local\Temp\gentee8C\guig.dll
            • Size 20KB
            • SHA256 624f4c25504ba431f450d8ecee2e2d0a4d87b95f7fa0b72db43f057ca021c328
            • MD5 SHA1 SHA512 SSDEEP TLSH

            genteert.dll

            • Path C:\Users\Admin\AppData\Local\Temp\genteert.dll
            • Size 60KB
            • SHA256 54c0da1735bb1cb02b60c321de938488345f8d1d26bf389c8cb2acad5d01b831
            • MD5 SHA1 SHA512 SSDEEP TLSH

            CoreLogic.dll

            • Path C:\Users\Admin\AppData\Local\Temp\is-7G57L.tmp\CoreLogic.dll
            • Size 105KB
            • SHA256 fc9b81d7969666e1515eb75302d3c9f6e6b0d75c391c997ae95eed8ee8d6705f
            • MD5 SHA1 SHA512 SSDEEP TLSH

            cf.msi

            • Path C:\Users\Admin\AppData\Local\Temp\is-7G57L.tmp\cf.msi
            • Size 19.0MB
            • SHA256 6d2eea059b29d04bb4b68c4a1172e631df4a49c3e2a11195619533ae437c46d4
            • MD5 SHA1 SHA512 SSDEEP TLSH

            cloudflared_installer.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\is-K8RE0.tmp\cloudflared_installer.tmp
            • Size 3.4MB
            • SHA256 21f15350de34eca4dd28158c814bd560cce87d00edc8e78639e15ff060c6528b
            • MD5 SHA1 SHA512 SSDEEP TLSH

            System.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsh6048.tmp\System.dll
            • Size 12KB
            • SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
            • MD5 SHA1 SHA512 SSDEEP TLSH

            UAC.dll

            • Path C:\Users\Admin\AppData\Local\Temp\nsh6048.tmp\UAC.dll
            • Size 14KB
            • SHA256 2f7f8fc05dc4fd0d5cda501b47e4433357e887bbfed7292c028d99c73b52dc08
            • MD5 SHA1 SHA512 SSDEEP TLSH

            adddf.vbe

            • Path C:\Users\Admin\AppData\Roaming\MeiQia\adddf.vbe
            • Size 9KB
            • SHA256 4ab61a28fb3175a523e528c1d6964d6005afcde98c5c2bda11b96023e7762822
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/4160-36-0x0000000000A20000-0x0000000000B12000-memory.dmp

            memory/4160-71-0x0000000000A20000-0x0000000000B12000-memory.dmp

            memory/4160-76-0x0000000000A20000-0x0000000000B12000-memory.dmp

            memory/4320-80-0x0000000002490000-0x00000000024B1000-memory.dmp

            memory/4320-78-0x0000000000940000-0x0000000000959000-memory.dmp

            memory/5276-75-0x0000000000B30000-0x0000000000EAE000-memory.dmp

            memory/5892-83-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-84-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-85-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-86-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-87-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-89-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-90-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-91-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-92-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-93-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-94-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-95-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp

            memory/5892-96-0x00007FF7B3260000-0x00007FF7B783C000-memory.dmp