Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    14/01/2022, 03:45

General

  • Target
    SecuriteInfo.com.Trojan.Agent.FRJZ.4911.1584.xlsm
  • Size 83KB
  • Sample220114-ea4w4seah3
  • SHA256 8de4c5b9bc7d488fbc48d117b2334e77d59d4e88255b3115a24ec31e3999f776
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://shopnhap.com/highbinder/UedVfTHDf5Em40/

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 5 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\SecuriteInfo.com.Trojan.Agent.FRJZ.4911.1584.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:1464
    • C:\Windows\SysWow64\rundll32.exe
      C:\Windows\SysWow64\rundll32.exe ..\wxeu.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:596
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\wxeu.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1084
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Vxlmfny\tuzxltomgvsofuc.gaf",LrPrkjVYSzBm
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1772
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Vxlmfny\tuzxltomgvsofuc.gaf",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1972

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/596-63-0x0000000000295000-0x0000000000296000-memory.dmp

        memory/596-62-0x0000000000271000-0x0000000000295000-memory.dmp

        memory/596-59-0x0000000075F81000-0x0000000075F83000-memory.dmp

        memory/1084-69-0x0000000000361000-0x0000000000385000-memory.dmp

        memory/1084-73-0x0000000002591000-0x00000000025B5000-memory.dmp

        memory/1084-77-0x00000000027D1000-0x00000000027F5000-memory.dmp

        memory/1084-67-0x00000000001F1000-0x0000000000215000-memory.dmp

        memory/1084-75-0x00000000025F1000-0x0000000002615000-memory.dmp

        memory/1084-71-0x0000000002441000-0x0000000002465000-memory.dmp

        memory/1464-55-0x000000002F671000-0x000000002F674000-memory.dmp

        memory/1464-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1464-56-0x0000000071551000-0x0000000071553000-memory.dmp

        memory/1772-81-0x0000000000251000-0x0000000000275000-memory.dmp

        memory/1972-85-0x0000000000751000-0x0000000000775000-memory.dmp

        memory/1972-87-0x0000000002321000-0x0000000002345000-memory.dmp

        memory/1972-89-0x0000000002381000-0x00000000023A5000-memory.dmp

        memory/1972-91-0x00000000024E1000-0x0000000002505000-memory.dmp

        memory/1972-93-0x0000000002641000-0x0000000002665000-memory.dmp