Analysis

  • max time kernel
    152s
  • max time network
    116s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    15/09/2020, 14:47

General

  • Target
    ccb8b817085d6383614156053979e81b.exe
  • Size 989KB
  • Sample200915-3qb2efcyc2
  • SHA256 f55f1629d0ce8fefbc36ec5ec8f108485e494363531f372f4735186aa4c1bc85
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\42EF15E83D\Log.txt

  • masslogger

Ransom Note
  • <|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.13 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: 9/15/2020 4:43:53 PM MassLogger Started: 9/15/2020 4:43:45 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Roaming\appdata\fkshsks.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 4 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 731 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\ccb8b817085d6383614156053979e81b.exe
    "C:\Users\Admin\AppData\Local\Temp\ccb8b817085d6383614156053979e81b.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • Loads dropped DLL
      • NTFS ADS
      • Suspicious use of WriteProcessMemory
      PID:1528
      • C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe
        "C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:1668
        • C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe
          "C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1768
        • C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe
          "C:\Users\Admin\AppData\Roaming\appdata\fkshsks.exe" 2 1768 259309479
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:1836

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1304-0-0x0000000000400000-0x00000000004FE000-memory.dmp

        memory/1528-2-0x0000000000090000-0x0000000000091000-memory.dmp

        memory/1668-7-0x0000000000400000-0x00000000004FE000-memory.dmp

        memory/1768-10-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1768-16-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1768-18-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/1768-19-0x0000000001E50000-0x0000000001EEA000-memory.dmp

        memory/1768-20-0x0000000001FC2000-0x0000000001FC3000-memory.dmp

        memory/1768-21-0x0000000000310000-0x00000000003A4000-memory.dmp

        memory/1768-23-0x0000000074560000-0x0000000074C4E000-memory.dmp

        memory/1768-26-0x0000000002470000-0x00000000024AE000-memory.dmp

        memory/1768-27-0x00000000052F0000-0x00000000052FF000-memory.dmp

        memory/1836-17-0x0000000000400000-0x00000000004FE000-memory.dmp