Analysis

  • max time kernel
    37s
  • max time network
    44s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    25-06-2022 11:04

General

  • Target

    395c92e5ce1c277a8fc8506e3dca15664db664eb68682990d1c0d47d38d15ea3.exe

  • Size

    144KB

  • MD5

    71b87a615077fbe383a4632b0eb8f14d

  • SHA1

    8da9f51e455a93c154a44ea63b29ccde657ec5a7

  • SHA256

    395c92e5ce1c277a8fc8506e3dca15664db664eb68682990d1c0d47d38d15ea3

  • SHA512

    c8d218822bbf76014e7fcb233622f2665ff2606613f93e09ad64194ea662cea2f63c24951be784a31789bcd38ed76f7e4dbf9f8ecd1c86ca6f41150418c4b50a

Malware Config

Extracted

Family

metasploit

Version

encoder/fnstenv_mov

Signatures

  • MetaSploit

    Detected malicious payload which is part of the Metasploit Framework, likely generated with msfvenom or similar.

  • Deletes itself 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry class 3 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\395c92e5ce1c277a8fc8506e3dca15664db664eb68682990d1c0d47d38d15ea3.exe
    "C:\Users\Admin\AppData\Local\Temp\395c92e5ce1c277a8fc8506e3dca15664db664eb68682990d1c0d47d38d15ea3.exe"
    1⤵
    • Writes to the Master Boot Record (MBR)
    • Drops file in System32 directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1472
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\395C92~1.EXE >> NUL
      2⤵
      • Deletes itself
      PID:840

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Bootkit

1
T1067

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/840-57-0x0000000000000000-mapping.dmp
  • memory/1472-54-0x0000000000400000-0x0000000000434000-memory.dmp
    Filesize

    208KB

  • memory/1472-55-0x0000000074F21000-0x0000000074F23000-memory.dmp
    Filesize

    8KB

  • memory/1472-56-0x0000000000260000-0x0000000000290000-memory.dmp
    Filesize

    192KB

  • memory/1472-58-0x0000000000400000-0x0000000000434000-memory.dmp
    Filesize

    208KB

  • memory/1472-59-0x0000000000260000-0x0000000000290000-memory.dmp
    Filesize

    192KB