Analysis

  • max time kernel
    149s
  • max time network
    159s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    21/11/2022, 15:57

General

  • Target

    52d00acb16cd0ace3299cf0316737c7984e235957e83a6369d0f4d16f70598a9.exe

  • Size

    806KB

  • MD5

    3a16a6be9ce2c8c3a36e6a5046defe20

  • SHA1

    eaeb585bd7cb1366f830b09624c130196df7b0f3

  • SHA256

    52d00acb16cd0ace3299cf0316737c7984e235957e83a6369d0f4d16f70598a9

  • SHA512

    0ad9fdc87a07079d028e96eea2300305df75e048d344b3691bcf02a7efa06c406a574e058f10470993a5169508f9cf7c4841b931df234faef12513426dc54b73

  • SSDEEP

    12288:8gDhdkq5BCoC5LfWSLTUQpr2Zu19QmrM9Q:8gDhdkMRWfLTUO2Zu1umrMS

Score
10/10

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 7 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\52d00acb16cd0ace3299cf0316737c7984e235957e83a6369d0f4d16f70598a9.exe
    "C:\Users\Admin\AppData\Local\Temp\52d00acb16cd0ace3299cf0316737c7984e235957e83a6369d0f4d16f70598a9.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /C AT /delete /yes
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1996
      • C:\Windows\SysWOW64\at.exe
        AT /delete /yes
        3⤵
          PID:1496
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\blastclnnn.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:532
        • C:\Windows\SysWOW64\at.exe
          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\blastclnnn.exe
          3⤵
            PID:1120

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • memory/2036-54-0x00000000767B1000-0x00000000767B3000-memory.dmp

              Filesize

              8KB

            • memory/2036-61-0x0000000000400000-0x00000000004E2000-memory.dmp

              Filesize

              904KB

            • memory/2036-62-0x0000000000400000-0x00000000004E2000-memory.dmp

              Filesize

              904KB