Analysis

  • max time kernel
    150s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v200722
  • submitted
    31/08/2020, 05:21

General

  • Target
    a29eef18539cc9cf7ef1f3e57ee96979.exe
  • Size 980KB
  • Sample200831-9py7a6p3b2
  • SHA256 1d51976f93b1fb65c446f7e27c4ebc1e865006883be720431e5129f2aed7325e
  • 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: 8/31/2020 7:24:58 AM MassLogger Started: 8/31/2020 7:24:53 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.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 2608 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\a29eef18539cc9cf7ef1f3e57ee96979.exe
    "C:\Users\Admin\AppData\Local\Temp\a29eef18539cc9cf7ef1f3e57ee96979.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3288
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:3084
      • C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe
        "C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:292
        • C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:3880
        • C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jkfljdgsglhd.exe" 2 3880 259315671
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:3924
  • 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:716

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/292-5-0x0000000000400000-0x00000000004FC000-memory.dmp

        memory/3288-0-0x0000000000400000-0x00000000004FC000-memory.dmp

        memory/3880-12-0x0000000000400000-0x0000000000542000-memory.dmp

        memory/3880-19-0x0000000004920000-0x0000000004921000-memory.dmp

        memory/3880-11-0x0000000000400000-0x0000000000542000-memory.dmp

        memory/3880-6-0x0000000000400000-0x0000000000542000-memory.dmp

        memory/3880-13-0x0000000002320000-0x00000000023BA000-memory.dmp

        memory/3880-26-0x00000000064B0000-0x00000000064BF000-memory.dmp

        memory/3880-15-0x0000000000762000-0x0000000000763000-memory.dmp

        memory/3880-16-0x00000000730A0000-0x000000007378E000-memory.dmp

        memory/3880-25-0x0000000007850000-0x0000000007851000-memory.dmp

        memory/3880-20-0x0000000004E20000-0x0000000004E21000-memory.dmp

        memory/3880-21-0x0000000004EC0000-0x0000000004EFE000-memory.dmp

        memory/3880-22-0x0000000004F00000-0x0000000004F01000-memory.dmp

        memory/3880-23-0x00000000052B0000-0x00000000052B1000-memory.dmp

        memory/3880-24-0x00000000065E0000-0x00000000065E1000-memory.dmp

        memory/3924-14-0x0000000000400000-0x00000000004FC000-memory.dmp