Analysis

  • max time kernel
    151s
  • max time network
    117s
  • platform
    windows10_x64
  • resource
    win10v200722
  • submitted
    02/09/2020, 05:57

General

  • Target
    91390eb941cc5a6bd277fc75b46891c9.exe
  • Size 1004KB
  • Sample200902-gh19g7qjsa
  • SHA256 5a756de7992382891d3e6bad6f6c8298b280969dcd246a5e2cbcab30e4b3346d
  • 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: 9/2/2020 7:53:55 AM MassLogger Started: 9/2/2020 7:53:50 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.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.

  • 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 2536 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\91390eb941cc5a6bd277fc75b46891c9.exe
    "C:\Users\Admin\AppData\Local\Temp\91390eb941cc5a6bd277fc75b46891c9.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:592
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:3736
      • C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe
        "C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:2252
        • C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:3296
        • C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jdkbkjb.exe" 2 3296 259318609
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:3960
  • 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:428

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/592-0-0x0000000000400000-0x0000000000501000-memory.dmp

        memory/2252-5-0x0000000000400000-0x0000000000501000-memory.dmp

        memory/3296-6-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3296-22-0x0000000004A00000-0x0000000004A01000-memory.dmp

        memory/3296-26-0x00000000062B0000-0x00000000062BF000-memory.dmp

        memory/3296-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3296-12-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3296-25-0x0000000007390000-0x0000000007391000-memory.dmp

        memory/3296-13-0x0000000002320000-0x00000000023BA000-memory.dmp

        memory/3296-24-0x0000000006500000-0x0000000006501000-memory.dmp

        memory/3296-15-0x00000000006E2000-0x00000000006E3000-memory.dmp

        memory/3296-16-0x0000000072D60000-0x000000007344E000-memory.dmp

        memory/3296-19-0x0000000004A80000-0x0000000004A81000-memory.dmp

        memory/3296-20-0x0000000004960000-0x0000000004961000-memory.dmp

        memory/3296-21-0x00000000023C0000-0x00000000023FE000-memory.dmp

        memory/3296-23-0x00000000052B0000-0x00000000052B1000-memory.dmp

        memory/3960-14-0x0000000000400000-0x0000000000501000-memory.dmp