Analysis

  • max time kernel
    36s
  • max time network
    123s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14/05/2021, 17:02

General

  • Target

    305df52e17cf7e129ece5188cd9bf51102fda9ac812d5.exe

  • Size

    716KB

  • MD5

    3edf30cca0e969d2ba512ffc73d77eb4

  • SHA1

    f6cc5083820a4897fbfb2890568691b12400fb59

  • SHA256

    305df52e17cf7e129ece5188cd9bf51102fda9ac812d597c3e29314b06e8b3b8

  • SHA512

    e50bbe973b796c802a789d0463bad04274d5f81a10e327b731b2c8730d779fb4266a782e59b88d1e590f75038b297873a4ec112097a5873dde3e1e1dd006755e

Malware Config

Extracted

Family

cryptbot

C2

remeze52.top

morhza05.top

Attributes
  • payload_url

    http://suleqs07.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\305df52e17cf7e129ece5188cd9bf51102fda9ac812d5.exe
    "C:\Users\Admin\AppData\Local\Temp\305df52e17cf7e129ece5188cd9bf51102fda9ac812d5.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:708
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\MThYVealsoGBj & timeout 3 & del /f /q "C:\Users\Admin\AppData\Local\Temp\305df52e17cf7e129ece5188cd9bf51102fda9ac812d5.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2176
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1312

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/708-114-0x0000000002180000-0x0000000002261000-memory.dmp

          Filesize

          900KB

        • memory/708-115-0x0000000000400000-0x00000000004E5000-memory.dmp

          Filesize

          916KB