Analysis

  • max time kernel
    150s
  • max time network
    117s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    08/09/2020, 07:38

General

  • Target
    a243176be93018dec5d7139c5143ecc9.exe
  • Size 995KB
  • Sample200908-1gjvamd1k2
  • SHA256 30b5bc6724803fbff98a3cc091d20146a58efe109f7b469aa42cf0a592178e54
  • 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: 9/8/2020 7:41:57 AM MassLogger Started: 9/8/2020 7:41:54 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.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.

  • 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
  • Drops file in Windows directory 1 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2572 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a243176be93018dec5d7139c5143ecc9.exe
    "C:\Users\Admin\AppData\Local\Temp\a243176be93018dec5d7139c5143ecc9.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3612
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:588
      • C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe
        "C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:188
        • C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe
          "C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:672
        • C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe
          "C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe" 2 672 259263140
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:1680
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:3248

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/188-5-0x0000000000400000-0x00000000004FF000-memory.dmp

        memory/672-12-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/672-22-0x00000000023F0000-0x00000000023F1000-memory.dmp

        memory/672-26-0x0000000006470000-0x000000000647F000-memory.dmp

        memory/672-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/672-6-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/672-25-0x00000000073A0000-0x00000000073A1000-memory.dmp

        memory/672-13-0x0000000002490000-0x000000000252A000-memory.dmp

        memory/672-24-0x00000000065D0000-0x00000000065D1000-memory.dmp

        memory/672-15-0x00000000023E2000-0x00000000023E3000-memory.dmp

        memory/672-16-0x0000000071D60000-0x000000007244E000-memory.dmp

        memory/672-19-0x0000000004B40000-0x0000000004B41000-memory.dmp

        memory/672-20-0x0000000004A10000-0x0000000004A11000-memory.dmp

        memory/672-21-0x0000000002360000-0x000000000239E000-memory.dmp

        memory/672-23-0x00000000053E0000-0x00000000053E1000-memory.dmp

        memory/1680-14-0x0000000000400000-0x00000000004FF000-memory.dmp

        memory/3612-0-0x0000000000400000-0x00000000004FF000-memory.dmp