Analysis

  • max time kernel
    150s
  • max time network
    111s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    20/09/2020, 04:01

General

  • Target
    d7da46701d3da6ffd69d4c05bd6dea98.exe
  • Size 1.1MB
  • Sample200920-tmfp355dhj
  • SHA256 0ca3dafa35066c7aaf4b76268b035cd0fe5fb10130bc5f9b04d723d50c974e82
  • 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: 9/20/2020 3:57:51 AM MassLogger Started: 9/20/2020 3:57:47 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Downloader ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> 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

  • MassLogger

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

  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Executes dropped EXE 3 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • 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 use of SetThreadContext 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2444 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d7da46701d3da6ffd69d4c05bd6dea98.exe
    "C:\Users\Admin\AppData\Local\Temp\d7da46701d3da6ffd69d4c05bd6dea98.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3052
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:1012
      • C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe
        "C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:968
        • C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe
          "C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1220
        • C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe
          "C:\Users\Admin\AppData\Roaming\appdata\bjsbjsf.exe" 2 1220 259268843
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:1352

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/968-5-0x0000000000400000-0x0000000000517000-memory.dmp

        memory/1220-6-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1220-22-0x0000000004F50000-0x0000000004F51000-memory.dmp

        memory/1220-26-0x0000000006490000-0x000000000649F000-memory.dmp

        memory/1220-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1220-11-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1220-25-0x0000000007380000-0x0000000007381000-memory.dmp

        memory/1220-13-0x00000000023A0000-0x000000000243A000-memory.dmp

        memory/1220-14-0x0000000002392000-0x0000000002393000-memory.dmp

        memory/1220-24-0x0000000006510000-0x0000000006511000-memory.dmp

        memory/1220-16-0x00000000739C0000-0x00000000740AE000-memory.dmp

        memory/1220-19-0x0000000004A50000-0x0000000004A51000-memory.dmp

        memory/1220-20-0x0000000004940000-0x0000000004941000-memory.dmp

        memory/1220-21-0x00000000028E0000-0x000000000291E000-memory.dmp

        memory/1220-23-0x00000000052C0000-0x00000000052C1000-memory.dmp

        memory/1352-15-0x0000000000400000-0x0000000000517000-memory.dmp

        memory/3052-0-0x0000000000400000-0x0000000000517000-memory.dmp