Overview

overview

8

Static

static

51f0887e1e...70.exe

windows7_x64

8

51f0887e1e...70.exe

windows10_x64

8

Analysis

  • max time kernel
    133s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    21/08/2021, 21:50

Sharing

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General

  • Target
    51f0887e1e94b2d5bdc7acf159e98670.exe
  • Size 317KB
  • Sample210821-bqbe25tb5e
  • SHA256 b78535aa7762e46ae614bf634240893124d20dc958d934748ebdb382425f474d
  • MD5 SHA1 SHA512
Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\51f0887e1e94b2d5bdc7acf159e98670.exe
    "C:\Users\Admin\AppData\Local\Temp\51f0887e1e94b2d5bdc7acf159e98670.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:664
    • C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe
      "C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:3980
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" /f /v Startup /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\bd1299733e\
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3044
        • C:\Windows\SysWOW64\reg.exe
          REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders" /f /v Startup /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\bd1299733e\
          4⤵
            PID:3544
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /SC MINUTE /MO 1 /TN rnyuf.exe /TR "C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe" /F
          3⤵
          • Creates scheduled task(s)
          PID:2864
    • C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe
      C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe
      1⤵
      • Executes dropped EXE
      PID:3488
    • C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe
      C:\Users\Admin\AppData\Local\Temp\bd1299733e\rnyuf.exe
      1⤵
      • Executes dropped EXE
      PID:3136

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/664-114-0x0000000002470000-0x000000000251E000-memory.dmp
          Download

          memory/664-115-0x0000000000400000-0x00000000023BA000-memory.dmp
          Download

          memory/3136-131-0x0000000000400000-0x00000000023BA000-memory.dmp
          Download

          memory/3136-130-0x0000000002500000-0x000000000264A000-memory.dmp
          Download

          memory/3488-127-0x0000000000400000-0x00000000023BA000-memory.dmp
          Download

          memory/3980-121-0x0000000003FB0000-0x0000000003FE3000-memory.dmp
          Download

          memory/3980-122-0x0000000000400000-0x00000000023BA000-memory.dmp
          Download