Analysis

  • max time kernel
    150s
  • max time network
    112s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    12/07/2020, 08:07

General

  • Target
    851ac75e2c62e8f02f2d15e60f562e3f.exe
  • Size 1.2MB
  • Sample200712-xqkhalhkca
  • SHA256 d730df4850006dea47a1820961961672cc08042a07d4bace39568261d1de2ddc
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

  • NTFS ADS 1 IoCs
  • Drops startup file 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2668 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\851ac75e2c62e8f02f2d15e60f562e3f.exe
    "C:\Users\Admin\AppData\Local\Temp\851ac75e2c62e8f02f2d15e60f562e3f.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • NTFS ADS
      • Drops startup file
      • Suspicious use of WriteProcessMemory
      PID:1664
      • C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe
        "C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        • Suspicious behavior: MapViewOfSection
        PID:1792
        • C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious behavior: AddClipboardFormatListener
          PID:2028
        • C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jjfghj.exe" 2 2028 126250
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:2124

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/2028-4-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/2028-8-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/2028-9-0x0000000000400000-0x0000000000541000-memory.dmp

        memory/2028-11-0x0000000002310000-0x00000000023AA000-memory.dmp

        memory/2028-12-0x00000000007B2000-0x00000000007B3000-memory.dmp