Analysis

  • max time kernel
    150s
  • max time network
    124s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    20/07/2020, 11:31

General

  • Target
    f29cbb184f0d0d183098b61505270c43.exe
  • Size 1.2MB
  • Sample200720-726wktmtlj
  • SHA256 ea7d1d4d1756342dc5d5fd0d0bb7c68499b0c06623a005e66903d2262f4fcb39
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\480F96756F\Log.txt

  • masslogger

Ransom Note
  • <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 10 Pro 64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 7/20/2020 11:31:18 AM MassLogger Started: 7/20/2020 11:31:15 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> NA

Signatures

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • NTFS ADS 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • Suspicious use of WriteProcessMemory 14 IoCs
  • Executes dropped EXE 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Drops startup file 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2714 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f29cbb184f0d0d183098b61505270c43.exe
    "C:\Users\Admin\AppData\Local\Temp\f29cbb184f0d0d183098b61505270c43.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious behavior: EnumeratesProcesses
    PID:976
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      • Drops startup file
      PID:3876
      • C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe
        "C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe"
        3⤵
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        PID:3364
        • C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Executes dropped EXE
          • Suspicious behavior: AddClipboardFormatListener
          PID:3944
        • C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jshuiwe.exe" 2 3944 62640
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:3904

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/3944-4-0x0000000000400000-0x000000000053D000-memory.dmp

        memory/3944-8-0x0000000000400000-0x000000000053D000-memory.dmp

        memory/3944-10-0x0000000002370000-0x000000000240A000-memory.dmp

        memory/3944-11-0x0000000002522000-0x0000000002523000-memory.dmp