Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    11/02/2022, 02:44

General

  • Target

    dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1.exe

  • Size

    2.7MB

  • MD5

    3aad5cb245c67dcc227bda1dd4ffc88b

  • SHA1

    13be9d3f00503f3faf7233815f5adcc3357993bd

  • SHA256

    dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1

  • SHA512

    9efa9aea5dc722519fe15127a6bf24cd7c45113414734c3da8089a1ab13cfe34120ecdf2aca5972d25078d4f4752b2a7ef91d61ad808c1692308fe8287c8be2f

Malware Config

Extracted

Family

cryptbot

C2

zyodof42.top

moregv04.top

Attributes
  • payload_url

    http://yaplzm05.top/download.php?file=bargen.exe

Signatures

  • CryptBot

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

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • 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 4 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies data under HKEY_USERS 47 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1.exe
    "C:\Users\Admin\AppData\Local\Temp\dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3556
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\vCldYLQeqLhyw & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:372
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:3396
  • C:\Windows\system32\MusNotifyIcon.exe
    %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
    1⤵
    • Checks processor information in registry
    PID:2120
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k NetworkService -p
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    PID:2220

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/3556-130-0x0000000000D80000-0x000000000146D000-memory.dmp

          Filesize

          6.9MB

        • memory/3556-131-0x0000000000D80000-0x000000000146D000-memory.dmp

          Filesize

          6.9MB

        • memory/3556-133-0x00000000776D4000-0x00000000776D6000-memory.dmp

          Filesize

          8KB

        • memory/3556-132-0x0000000000D80000-0x000000000146D000-memory.dmp

          Filesize

          6.9MB