Analysis

  • max time kernel
    152s
  • max time network
    120s
  • platform
    windows10_x64
  • resource
    win10v200722
  • submitted
    08/09/2020, 07:37

General

  • Target
    336eced8bd112621c366d1ace4794964.exe
  • Size 994KB
  • Sample200908-symppsel1a
  • SHA256 6136e00a6bd5e0e14f438f96bce666f47297d0d9735705f4038e55c158b4e9af
  • 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: 9/8/2020 9:33:53 AM MassLogger Started: 9/8/2020 9:33:50 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 <|| 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 2550 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\336eced8bd112621c366d1ace4794964.exe
    "C:\Users\Admin\AppData\Local\Temp\336eced8bd112621c366d1ace4794964.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3488
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:3780
      • 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:4048
        • 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:3884
        • C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe
          "C:\Users\Admin\AppData\Roaming\appdata\ertgvbnfh.exe" 2 3884 259305140
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of SetWindowsHookEx
          PID:3868
  • 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:632

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/3488-0-0x0000000000400000-0x00000000004FE000-memory.dmp

        memory/3868-14-0x0000000000400000-0x00000000004FE000-memory.dmp

        memory/3884-12-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3884-19-0x0000000004B30000-0x0000000004B31000-memory.dmp

        memory/3884-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3884-6-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/3884-26-0x0000000006490000-0x000000000649F000-memory.dmp

        memory/3884-13-0x0000000002440000-0x00000000024DA000-memory.dmp

        memory/3884-25-0x0000000007380000-0x0000000007381000-memory.dmp

        memory/3884-15-0x0000000000AE2000-0x0000000000AE3000-memory.dmp

        memory/3884-16-0x0000000072150000-0x000000007283E000-memory.dmp

        memory/3884-20-0x0000000002940000-0x0000000002941000-memory.dmp

        memory/3884-21-0x0000000000B00000-0x0000000000B3E000-memory.dmp

        memory/3884-22-0x00000000029E0000-0x00000000029E1000-memory.dmp

        memory/3884-23-0x0000000005330000-0x0000000005331000-memory.dmp

        memory/3884-24-0x00000000065E0000-0x00000000065E1000-memory.dmp

        memory/4048-5-0x0000000000400000-0x00000000004FE000-memory.dmp