Overview

overview

10

Static

static

6

windows-up...fw.exe

windows7_x64

10

windows-up...fw.exe

windows10_x64

10

Resubmissions

28/12/2020, 17:21

201228-w8s6w2cpm210

28/12/2020, 11:12

201228-bctexhqz8s10

Analysis

  • max time kernel
    7s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    28/12/2020, 17:21

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General

  • Target
    windows-update-cve-wfw.exe
  • Size 2.7MB
  • Sample201228-w8s6w2cpm2
  • SHA256 1fda7a2eeb2478c97b59f75f094c546d585923b286d8d7a52d4afe2795f186e7
  • MD5 SHA1 SHA512
Score
10/10
evasionransomwaretrojan

Malware Config

Signatures

  • UAC bypass 3 TTPs
    evasiontrojan
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Enumerates VirtualBox DLL files 2 TTPs
  • Looks for VirtualBox drivers on disk 2 TTPs
    evasion
  • Looks for VMWare drivers on disk 2 TTPs
    evasion
  • Drops file in Program Files directory 398 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\windows-update-cve-wfw.exe
    "C:\Users\Admin\AppData\Local\Temp\windows-update-cve-wfw.exe"
    1⤵
    • Drops file in Program Files directory
    • Suspicious use of WriteProcessMemory
    PID:3372
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /C reg ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1788
      • C:\Windows\system32\reg.exe
        reg ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        3⤵
        • Modifies registry key
        PID:1156
    • C:\Windows\system32\cmd.exe
      cmd /C vssadmin Delete Shadows /All /Quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:592
      • C:\Windows\system32\vssadmin.exe
        vssadmin Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:1864
    • C:\Windows\system32\cmd.exe
      cmd /C "rd /s /q C:\\$RECYCLE.BIN"
      2⤵
        PID:588
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3268

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/3372-2-0x0000000000BD0000-0x0000000000EB7000-memory.dmp
          Download