Analysis

  • max time kernel
    122s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    27/01/2022, 18:22

General

  • Target

    bf51bc4bba9638f5411821d48ef31e7e478c28f3.exe

  • Size

    1.3MB

  • MD5

    ff99d60ef8dbf1a27b38e3cd86f2c037

  • SHA1

    bf51bc4bba9638f5411821d48ef31e7e478c28f3

  • SHA256

    188d31cc6d4e4a75f41b6593331a92c5453bbb4c38b790b9a253f2a4c3e2048d

  • SHA512

    d244c3088731d70afd078a53735e4380476878aee8e0b54d2cccbf9985727c5f5d17933ea9cd23d8ef6e174bd9ca90c82402f9a0cda8582633aca62a1b571bee

Malware Config

Extracted

Family

cryptbot

C2

gomvub75.top

morder07.top

Attributes
  • payload_url

    http://peugbe10.top/download.php?file=lierne.exe

Signatures

  • CryptBot

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

  • Deletes itself 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 use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bf51bc4bba9638f5411821d48ef31e7e478c28f3.exe
    "C:\Users\Admin\AppData\Local\Temp\bf51bc4bba9638f5411821d48ef31e7e478c28f3.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1944
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\uQhkMLvP & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bf51bc4bba9638f5411821d48ef31e7e478c28f3.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1100
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:476

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1944-54-0x00000000760F1000-0x00000000760F3000-memory.dmp

          Filesize

          8KB

        • memory/1944-55-0x0000000000400000-0x0000000000555000-memory.dmp

          Filesize

          1.3MB

        • memory/1944-56-0x00000000005B0000-0x00000000005F8000-memory.dmp

          Filesize

          288KB