Analysis

  • max time kernel
    118s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • 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.

  • Deletes itself 1 IoCs
  • 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
  • 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 behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 8 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 whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\idtUAWAp & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\dd96b13e82e44ba3b20e0ef08bedd0342cc7347339292388f29d9c7539e71df1.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1724
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:660

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1668-54-0x0000000075B51000-0x0000000075B53000-memory.dmp

          Filesize

          8KB

        • memory/1668-55-0x00000000010F0000-0x00000000017DD000-memory.dmp

          Filesize

          6.9MB

        • memory/1668-56-0x00000000010F0000-0x00000000017DD000-memory.dmp

          Filesize

          6.9MB

        • memory/1668-57-0x0000000077330000-0x0000000077332000-memory.dmp

          Filesize

          8KB

        • memory/1668-58-0x00000000010F0000-0x00000000017DD000-memory.dmp

          Filesize

          6.9MB