Analysis

  • max time kernel
    38s
  • max time network
    42s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14/05/2021, 09:06

General

  • Target

    fe68a629898384bb2edf90406da4c9d6764fd04e53375.exe

  • Size

    745KB

  • MD5

    4f47f2fa563304efe9fffb13b32427f4

  • SHA1

    97cc4db66c9636bd47031cb9e4a667643be9ee89

  • SHA256

    fe68a629898384bb2edf90406da4c9d6764fd04e5337514e7edd9c2c608d2242

  • SHA512

    a359e40931c6124e6b2dfce44b107fdad8e439d10dc1dba018d4c62c9bbca88f8bb2788249d810c3c91dd542461dd659b0472af746fd79455c246b7e5dddec03

Malware Config

Extracted

Family

cryptbot

C2

remdny42.top

morpgr04.top

Attributes
  • payload_url

    http://sulnom06.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 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fe68a629898384bb2edf90406da4c9d6764fd04e53375.exe
    "C:\Users\Admin\AppData\Local\Temp\fe68a629898384bb2edf90406da4c9d6764fd04e53375.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\OPsmMqiVs & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\fe68a629898384bb2edf90406da4c9d6764fd04e53375.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:744
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3744

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/740-114-0x0000000002270000-0x0000000002351000-memory.dmp

          Filesize

          900KB

        • memory/740-115-0x0000000000400000-0x00000000004E5000-memory.dmp

          Filesize

          916KB