Analysis

  • max time kernel
    25s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    15/06/2021, 08:47

General

  • Target
    12dcd1bdd0cae0600249bccca37eb78756f4bec7b9e98.exe
  • Size 712KB
  • Sample210615-7r81bc1a3a
  • SHA256 12dcd1bdd0cae0600249bccca37eb78756f4bec7b9e98d857eb33251b6f357fe
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • cryptbot

C2
  • kiykci22.top

  • morhap02.top

Attributes
  • payload_url

    http://peouts02.top/download.php?file=lv.exe

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • CryptBot Payload 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\12dcd1bdd0cae0600249bccca37eb78756f4bec7b9e98.exe
    "C:\Users\Admin\AppData\Local\Temp\12dcd1bdd0cae0600249bccca37eb78756f4bec7b9e98.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c start "" "C:\Users\Admin\AppData\Local\Temp\ZZIeXQLh.exe"
      2⤵
        PID:2164
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\lbchgESbwfssX & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\12dcd1bdd0cae0600249bccca37eb78756f4bec7b9e98.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:3872
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          3⤵
          • Delays execution with timeout.exe
          PID:2576

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/580-114-0x0000000002AB0000-0x0000000002B91000-memory.dmp

          memory/580-115-0x0000000000400000-0x0000000000C7A000-memory.dmp