Analysis

  • max time kernel
    151s
  • max time network
    128s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    09/09/2020, 12:21

General

  • Target
    5d2216c22cbd6af8d98e633c6d27010a.exe
  • Size 1.0MB
  • Sample200909-28nttemz42
  • SHA256 3d5ccf2295d249dcdc8309b2471ba26943edd9945ececd27929335cccf65049b
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\E2C1E8F1FA\Log.txt

  • masslogger

Ransom Note
  • <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 9/9/2020 12:17:54 PM MassLogger Started: 9/9/2020 12:17:48 PM Interval: 1 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.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
  • Loads dropped DLL 2 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 768 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5d2216c22cbd6af8d98e633c6d27010a.exe
    "C:\Users\Admin\AppData\Local\Temp\5d2216c22cbd6af8d98e633c6d27010a.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:336
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:1048
      • C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe
        "C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:1796
        • C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe
          "C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1180
        • C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe
          "C:\Users\Admin\AppData\Roaming\appdata\hasjkhka.exe" 2 1180 259267031
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:1780

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/336-0-0x0000000000400000-0x0000000000508000-memory.dmp

        memory/1048-2-0x0000000000090000-0x0000000000091000-memory.dmp

        memory/1180-16-0x0000000001E80000-0x0000000001F1A000-memory.dmp

        memory/1180-25-0x0000000005020000-0x000000000502F000-memory.dmp

        memory/1180-24-0x0000000004A90000-0x0000000004ACE000-memory.dmp

        memory/1180-12-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1180-14-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1180-21-0x0000000073750000-0x0000000073E3E000-memory.dmp

        memory/1180-9-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1180-19-0x0000000000340000-0x00000000003D3000-memory.dmp

        memory/1180-18-0x0000000000272000-0x0000000000273000-memory.dmp

        memory/1780-17-0x0000000000400000-0x0000000000508000-memory.dmp

        memory/1796-7-0x0000000000400000-0x0000000000508000-memory.dmp