Analysis

  • max time kernel
    51s
  • max time network
    175s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    30/03/2022, 07:59

General

  • Target
    04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe
  • Size 1.2MB
  • Sample220330-jvdb4seedl
  • SHA256 04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • MassLogger

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

  • MassLogger Main Payload 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe
    "C:\Users\Admin\AppData\Local\Temp\04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5116
    • C:\Users\Admin\AppData\Local\Temp\04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe
      "C:\Users\Admin\AppData\Local\Temp\04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:3472

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\04152a0afcecfd0fec39d738d02d64f2ef360a82b9d001c4e25465ec6a44d9cc.exe.log
        • Size 226B
        • SHA256 7e750c904c43d27c89e55af809a679a96c0bb63fc511006ffbceffc2c7f6fb7d
        • MD5 SHA1 SHA512

        memory/3472-126-0x0000000000400000-0x0000000000486000-memory.dmp

        memory/3472-128-0x0000000005BA0000-0x0000000005C32000-memory.dmp

        memory/3472-129-0x00000000061F0000-0x0000000006794000-memory.dmp

        memory/3472-130-0x0000000006BD0000-0x0000000006C36000-memory.dmp

        memory/3472-131-0x0000000007420000-0x0000000007470000-memory.dmp

        memory/3472-132-0x0000000007640000-0x00000000076DC000-memory.dmp

        memory/3472-133-0x0000000007410000-0x000000000741A000-memory.dmp

        memory/3472-134-0x0000000003153000-0x0000000003155000-memory.dmp

        memory/5116-124-0x0000000000170000-0x00000000002B0000-memory.dmp