Analysis

  • max time kernel
    152s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/10/2022, 14:26

General

  • Target

    3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe

  • Size

    248KB

  • MD5

    a123251af864122aa944e99d145b0051

  • SHA1

    ef8aef577bb37e2badd7d2705eebf9c83b156b42

  • SHA256

    3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8

  • SHA512

    ee62b85b66dc71811148d10d57b4b7d58df07d3cd63a50e2aad8c7d2d092d1ab300f5d48f7c63b1a31c6d98c9ec38b8a9e3c4cc07a8e2d2e2a6e84a95ebfccf9

  • SSDEEP

    6144:huMJWY+qaHEQCcYfSBYJbQCjRcqESEgm6Anhc1kG6EmRzxs:h+YcUc6SBLLTSEgBAnhc1kGsxs

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
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 5 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.exe
    "C:\Users\Admin\AppData\Local\Temp\3b737fe6f838d72c9f28ddb5ea1c27257ceca61d9db3e36bae9dec9aa1c540b8.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
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5068
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /C AT /delete /yes
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4480
      • C:\Windows\SysWOW64\at.exe
        AT /delete /yes
        3⤵
          PID:2752
      • 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\WORD.exe
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3504
        • C:\Windows\SysWOW64\at.exe
          AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\WORD.exe
          3⤵
            PID:2348

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • memory/5068-132-0x0000000000400000-0x000000000049AF8B-memory.dmp

        Filesize

        619KB

      • memory/5068-137-0x0000000000400000-0x000000000049AF8B-memory.dmp

        Filesize

        619KB