Analysis

  • max time kernel
    150s
  • max time network
    118s
  • platform
    windows10_x64
  • resource
    win10v200722
  • submitted
    15/09/2020, 05:42

General

  • Target
    a6de5722cb9978b0e73781c41301c19f.exe
  • Size 1002KB
  • Sample200915-eemaw2f12s
  • SHA256 7df80cbc3b1a80c75e28295d06119ffef7c17cb39f73a8e31ae1e90fae54a6d1
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\94A4C56A47\Log.txt

  • masslogger

Ransom Note
  • <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.13 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: 9/15/2020 7:38:57 AM MassLogger Started: 9/15/2020 7:38:53 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.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

  • 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 2612 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\a6de5722cb9978b0e73781c41301c19f.exe
    "C:\Users\Admin\AppData\Local\Temp\a6de5722cb9978b0e73781c41301c19f.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1568
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:2684
      • C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe
        "C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:2752
        • C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe
          "C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:3720
        • C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe
          "C:\Users\Admin\AppData\Roaming\appdata\sfhjhdkk.exe" 2 3720 259294250
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:3876

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1568-0-0x0000000000400000-0x0000000000501000-memory.dmp

        memory/2752-5-0x0000000000400000-0x0000000000501000-memory.dmp

        memory/3720-11-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3720-19-0x00000000048A0000-0x00000000048A1000-memory.dmp

        memory/3720-26-0x00000000064C0000-0x00000000064CF000-memory.dmp

        memory/3720-6-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3720-13-0x0000000002370000-0x000000000240A000-memory.dmp

        memory/3720-25-0x00000000074B0000-0x00000000074B1000-memory.dmp

        memory/3720-15-0x00000000006E2000-0x00000000006E3000-memory.dmp

        memory/3720-16-0x0000000072D80000-0x000000007346E000-memory.dmp

        memory/3720-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3720-20-0x0000000004DE0000-0x0000000004DE1000-memory.dmp

        memory/3720-21-0x0000000004EA0000-0x0000000004EDE000-memory.dmp

        memory/3720-22-0x0000000004EE0000-0x0000000004EE1000-memory.dmp

        memory/3720-23-0x00000000052B0000-0x00000000052B1000-memory.dmp

        memory/3720-24-0x0000000006510000-0x0000000006511000-memory.dmp

        memory/3876-14-0x0000000000400000-0x0000000000501000-memory.dmp