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Analysis

  • max time kernel
    3s
  • max time network
    35s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    26/04/2021, 18:02

General

  • Target

    keygen-step-4d.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
    "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2232
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2732
      • C:\Windows\SysWOW64\rundll32.exe
        "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
        3⤵
          PID:3708
      • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
        "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
        2⤵
          PID:208
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k SystemNetworkService
        1⤵
          PID:2664

        Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • memory/208-127-0x00000000000B0000-0x00000000000B1000-memory.dmp

                Filesize

                4KB

              • memory/208-133-0x0000000000500000-0x0000000000501000-memory.dmp

                Filesize

                4KB

              • memory/208-138-0x0000000000510000-0x000000000052C000-memory.dmp

                Filesize

                112KB

              • memory/208-141-0x0000000000530000-0x0000000000531000-memory.dmp

                Filesize

                4KB

              • memory/1040-153-0x000001AB154B0000-0x000001AB15520000-memory.dmp

                Filesize

                448KB

              • memory/1800-148-0x000001BD4EA80000-0x000001BD4EACB000-memory.dmp

                Filesize

                300KB

              • memory/1800-152-0x000001BD4ED00000-0x000001BD4ED70000-memory.dmp

                Filesize

                448KB

              • memory/3708-146-0x00000000049B5000-0x0000000004AB6000-memory.dmp

                Filesize

                1.0MB

              • memory/3708-147-0x0000000004B80000-0x0000000004BDC000-memory.dmp

                Filesize

                368KB