Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    14/01/2022, 16:16

General

  • Target

    25031893-833908.xlsm

  • Size

    83KB

  • MD5

    a19739c3b8b42e530b0c39885a7eb572

  • SHA1

    034d7b56335bc65f1010c24801f40f739f981418

  • SHA256

    689555499fd2dff9a85acca987cf63ecb004150fb9428e7336b11a90eed8a4a6

  • SHA512

    30cda33c13a7c5cbee38fc74846b6263ca20efc53434577855032e59f1e4376675d9f46b804e61964713d91fe7af8f9bcd3ffe010ebeec4461e45c38ea6c7238

Score
10/10

Malware Config

Extracted

Language
xlm4.0
Source
URLs
xlm40.dropper

http://therecyclingmachine.com/wp-admin/LzpOZSlkq90fYT1/

xlm40.dropper

http://zhongmaifangwu.com/TEST777/3U4Un0u/

Signatures

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • Blocklisted process makes network request 4 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • 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 SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\25031893-833908.xlsm
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1756
    • C:\Windows\SysWow64\rundll32.exe
      C:\Windows\SysWow64\rundll32.exe ..\erum.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1672
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\erum.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1168
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Mxjarqnhjydos\cybxbupgobc.rqe",IHJOXeHIaAIRHlO
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1764
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Mxjarqnhjydos\cybxbupgobc.rqe",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:988

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/988-86-0x0000000000AA1000-0x0000000000AC5000-memory.dmp

          Filesize

          144KB

        • memory/988-95-0x0000000002AB1000-0x0000000002AD5000-memory.dmp

          Filesize

          144KB

        • memory/988-92-0x0000000002231000-0x0000000002255000-memory.dmp

          Filesize

          144KB

        • memory/988-90-0x0000000002101000-0x0000000002125000-memory.dmp

          Filesize

          144KB

        • memory/988-88-0x0000000000B01000-0x0000000000B25000-memory.dmp

          Filesize

          144KB

        • memory/1168-76-0x0000000002771000-0x0000000002795000-memory.dmp

          Filesize

          144KB

        • memory/1168-66-0x00000000002A1000-0x00000000002C5000-memory.dmp

          Filesize

          144KB

        • memory/1168-68-0x00000000003A1000-0x00000000003C5000-memory.dmp

          Filesize

          144KB

        • memory/1168-70-0x0000000001F31000-0x0000000001F55000-memory.dmp

          Filesize

          144KB

        • memory/1168-72-0x0000000001F91000-0x0000000001FB5000-memory.dmp

          Filesize

          144KB

        • memory/1168-74-0x0000000002711000-0x0000000002735000-memory.dmp

          Filesize

          144KB

        • memory/1672-58-0x0000000076451000-0x0000000076453000-memory.dmp

          Filesize

          8KB

        • memory/1672-61-0x0000000001BE1000-0x0000000001C05000-memory.dmp

          Filesize

          144KB

        • memory/1672-62-0x0000000001C05000-0x0000000001C06000-memory.dmp

          Filesize

          4KB

        • memory/1756-55-0x0000000071AA1000-0x0000000071AA3000-memory.dmp

          Filesize

          8KB

        • memory/1756-54-0x000000002FC51000-0x000000002FC54000-memory.dmp

          Filesize

          12KB

        • memory/1756-56-0x000000005FFF0000-0x0000000060000000-memory.dmp

          Filesize

          64KB