Analysis

  • max time kernel
    36s
  • max time network
    126s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    13/05/2021, 19:01

General

  • Target

    2051799f92fd036d6e1c8a9c06a4aea85a9509214cd06.exe

  • Size

    731KB

  • MD5

    105f97e06f45250a6448035b94f2ef2b

  • SHA1

    3819346f3b8c05add77c89205a58533dabbc7249

  • SHA256

    2051799f92fd036d6e1c8a9c06a4aea85a9509214cd0623c0df2fe62bd99986b

  • SHA512

    9a57ebc3835d2abedb966a501bfb7c2d15769a8f3a95320c00dc91e892710d182fffd4f1971dda989c5129da493cb64ce329cb9b8a2aa1177167ecadd07cc3d7

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\2051799f92fd036d6e1c8a9c06a4aea85a9509214cd06.exe
    "C:\Users\Admin\AppData\Local\Temp\2051799f92fd036d6e1c8a9c06a4aea85a9509214cd06.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:800
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\rPQsVWrlNvv & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\2051799f92fd036d6e1c8a9c06a4aea85a9509214cd06.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1472
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2076

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/800-114-0x0000000002260000-0x0000000002341000-memory.dmp

          Filesize

          900KB

        • memory/800-115-0x0000000000400000-0x00000000004E5000-memory.dmp

          Filesize

          916KB