Analysis

  • max time kernel
    80s
  • max time network
    67s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-04-2022 04:24

General

  • Target

    a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe

  • Size

    1.1MB

  • MD5

    d77ad4004f0b4c33a955c27ab30ed42f

  • SHA1

    23e8c7b5eedff353bb44478a753cd6c75781b8b2

  • SHA256

    a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878

  • SHA512

    86965eb4ad5b2f2264f052923231b5d3fb8062c4afbdb4554f4fdddcb62386778e9b0a7a826f6ca662c5562c5b2af3de16a2520806bb0a9d2493566e84c834f8

Malware Config

Signatures

  • MassLogger

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

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

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

  • Deletes itself 1 IoCs
  • 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 35 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe
    "C:\Users\Admin\AppData\Local\Temp\a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1072
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:940
      • C:\Windows\SysWOW64\notepad.exe
        "C:\Windows\system32\notepad.exe"
        2⤵
        • Drops startup file
        PID:1428
      • C:\Users\Admin\AppData\Local\Temp\a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe
        "C:\Users\Admin\AppData\Local\Temp\a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe"
        2⤵
        • Checks computer location settings
        • Accesses Microsoft Outlook profiles
        • Suspicious behavior: AddClipboardFormatListener
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        • outlook_office_path
        • outlook_win_path
        PID:1408
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\a84c8d7d84dacffbfa80ab2eec320132c5c0789a72a1d9e85465417edfd7a878.exe'
          3⤵
          • Deletes itself
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1888

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • memory/940-55-0x0000000000000000-mapping.dmp

    • memory/940-56-0x000007FEFBD51000-0x000007FEFBD53000-memory.dmp

      Filesize

      8KB

    • memory/1072-54-0x00000000753E1000-0x00000000753E3000-memory.dmp

      Filesize

      8KB

    • memory/1408-61-0x000000000051C9C0-mapping.dmp

    • memory/1408-63-0x0000000001E00000-0x0000000001E86000-memory.dmp

      Filesize

      536KB

    • memory/1408-62-0x0000000001E00000-0x0000000001E86000-memory.dmp

      Filesize

      536KB

    • memory/1408-65-0x0000000004AA5000-0x0000000004AB6000-memory.dmp

      Filesize

      68KB

    • memory/1408-66-0x0000000006750000-0x000000000678E000-memory.dmp

      Filesize

      248KB

    • memory/1408-67-0x00000000067D0000-0x0000000006860000-memory.dmp

      Filesize

      576KB

    • memory/1428-59-0x0000000000000000-mapping.dmp

    • memory/1888-68-0x0000000000000000-mapping.dmp

    • memory/1888-70-0x0000000074080000-0x000000007462B000-memory.dmp

      Filesize

      5.7MB