Analysis

  • max time kernel
    148s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/08/2026, 02:52

General

  • Target
    2026-08-08_b63f29e7768bef83e2a6b33da764b385_akira.exe
  • Size 601KB
  • Sample260808-dcymfabc93
  • SHA256 0c9d3755f7157ee428cccc43c2497daae05b9fc3d9667ede6806356596319740
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Detects ransomware indicator 2 IoCs
  • Modifies boot configuration data using bcdedit 1 TTPs 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Deletes backup catalog 3 TTPs 2 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Drops file in Drivers directory 2 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Checks SCSI registry key(s) 3 TTPs 4 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 2 IoCs
  • Interacts with shadow copies 3 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies Control Panel 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-08_b63f29e7768bef83e2a6b33da764b385_akira.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-08_b63f29e7768bef83e2a6b33da764b385_akira.exe"
    1⤵
    • Drops file in Drivers directory
    • Adds Run key to start application
    • Sets desktop wallpaper using registry
    • Modifies Control Panel
    • Suspicious behavior: RenamesItself
    • Suspicious use of WriteProcessMemory
    PID:4864
    • C:\Windows\system32\vssadmin.exe
      "vssadmin" delete shadows /all /quiet
      2⤵
      • Interacts with shadow copies
      PID:3704
    • C:\Windows\System32\Wbem\wmic.exe
      "wmic" shadowcopy delete
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4116
    • C:\Windows\system32\bcdedit.exe
      "bcdedit" /set {default} recoveryenabled No
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:2504
    • C:\Windows\system32\bcdedit.exe
      "bcdedit" /set {default} bootstatuspolicy ignoreallfailures
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:2180
    • C:\Windows\system32\wbadmin.exe
      "wbadmin" delete catalog -quiet
      2⤵
      • Deletes backup catalog
      PID:5028
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -NoProfile -WindowStyle Hidden -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\Temp\wupd_init.ps1
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Sets desktop wallpaper using registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1588
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
        "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\4vlihsaf\4vlihsaf.cmdline"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1168
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
          C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES60D3.tmp" "c:\Users\Admin\AppData\Local\Temp\4vlihsaf\CSCEE7A76E7BCB48CCA894F333B884F991.TMP"
          4⤵
            PID:1828
      • C:\Windows\system32\cmd.exe
        "cmd" /c C:\Users\Admin\AppData\Local\Temp\wupd_gc.bat
        2⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:1768
        • C:\Windows\system32\timeout.exe
          timeout /t 3 /nobreak
          3⤵
          • Delays execution with timeout.exe
          PID:3212
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:968
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3200
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:5968
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:4276
      • C:\Users\Admin\AppData\Local\Temp\2026-08-08_b63f29e7768bef83e2a6b33da764b385_akira.exe
        C:\Users\Admin\AppData\Local\Temp\2026-08-08_b63f29e7768bef83e2a6b33da764b385_akira.exe
        1⤵
        • Drops file in Drivers directory
        • Adds Run key to start application
        • Suspicious use of WriteProcessMemory
        PID:1204
        • C:\Windows\system32\vssadmin.exe
          "vssadmin" delete shadows /all /quiet
          2⤵
          • Interacts with shadow copies
          PID:2356
        • C:\Windows\System32\Wbem\wmic.exe
          "wmic" shadowcopy delete
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:820
        • C:\Windows\system32\bcdedit.exe
          "bcdedit" /set {default} recoveryenabled No
          2⤵
          • Modifies boot configuration data using bcdedit
          PID:6000
        • C:\Windows\system32\bcdedit.exe
          "bcdedit" /set {default} bootstatuspolicy ignoreallfailures
          2⤵
          • Modifies boot configuration data using bcdedit
          PID:2316
        • C:\Windows\system32\wbadmin.exe
          "wbadmin" delete catalog -quiet
          2⤵
          • Deletes backup catalog
          PID:3756
        • C:\Windows\system32\cmd.exe
          "cmd" /c C:\Users\Admin\AppData\Local\Temp\wupd_gc.bat
          2⤵
          • Executes a command shell one-liner
          • Suspicious use of WriteProcessMemory
          PID:4208
          • C:\Windows\system32\timeout.exe
            timeout /t 3 /nobreak
            3⤵
            • Delays execution with timeout.exe
            PID:5980

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            4vlihsaf.dll

            • Path C:\Users\Admin\AppData\Local\Temp\4vlihsaf\4vlihsaf.dll
            • Size 3KB
            • SHA256 dd1e124bab426297ffba291822fa566a774c651ccb99871826597e6b1e469bf4
            • MD5 SHA1 SHA512 TLSH

            RES60D3.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\RES60D3.tmp
            • Size 1KB
            • SHA256 3a2b13f33b5999366c8ec34ebb91629b8a5b3a93ba22fb83239205028c82b57e
            • MD5 SHA1 SHA512 TLSH

            wupd_gc.bat

            • Path C:\Users\Admin\AppData\Local\Temp\wupd_gc.bat
            • Size 145B
            • SHA256 e146f835032b184e7227f0cd168285a4452da8fed0929bd311d99047d61c3488
            • MD5 SHA1 SHA512 TLSH

            wupd_gc.bat

            • Path C:\Users\Admin\AppData\Local\Temp\wupd_gc.bat
            • Size 186B
            • SHA256 07ec1a5789a5372d9d192918024279443d972fb2f6b0bf9797103f4094f15028
            • MD5 SHA1 SHA512 TLSH

            wupd_init.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\wupd_init.ps1
            • Size 1KB
            • SHA256 753bf1a6df9283e72a56a516f4082b0ccbae260ca1a68406642c7f9c5601bcdb
            • MD5 SHA1 SHA512 TLSH

            wupd_note.tmp

            • Path C:\Users\Admin\AppData\Local\Temp\wupd_note.tmp
            • Size 64B
            • SHA256 7bd23106ac7ead2c3e2783c5976ed41da0a02d86bb2e6dedcdd6c69cf5fd7372
            • MD5 SHA1 SHA512 TLSH

            4vlihsaf.0.cs

            • Path \??\c:\Users\Admin\AppData\Local\Temp\4vlihsaf\4vlihsaf.0.cs
            • Size 196B
            • SHA256 70dfabfd1615832390e496ccb312d1f826cbf4eb57a36a6c2e337130e6449192
            • MD5 SHA1 SHA512 TLSH

            4vlihsaf.cmdline

            • Path \??\c:\Users\Admin\AppData\Local\Temp\4vlihsaf\4vlihsaf.cmdline
            • Size 369B
            • SHA256 10ec70db44c15f005fabdab9c0f5df7f9c664143877f157aafe865b0468e1f12
            • MD5 SHA1 SHA512 TLSH

            CSCEE7A76E7BCB48CCA894F333B884F991.TMP

            • Path \??\c:\Users\Admin\AppData\Local\Temp\4vlihsaf\CSCEE7A76E7BCB48CCA894F333B884F991.TMP
            • Size 652B
            • SHA256 aacb02d4d00135ee10bbd7415b9047b73d19836239190302d38f6e60eb8f9e2a
            • MD5 SHA1 SHA512 TLSH

            memory/1204-908-0x00007FF667620000-0x00007FF6676BC000-memory.dmp

            memory/1588-906-0x0000024EE5400000-0x0000024EE5422000-memory.dmp

            memory/1588-925-0x0000024E80000000-0x0000024E80008000-memory.dmp

            memory/1588-927-0x0000024EFD830000-0x0000024EFD9FA000-memory.dmp

            memory/4864-892-0x00007FF667620000-0x00007FF6676BC000-memory.dmp