Analysis

  • max time kernel
    60s
  • max time network
    80s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    30/03/2022, 08:16

General

  • Target
    eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe
  • Size 1.2MB
  • Sample220330-j6bbwsaed3
  • SHA256 eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58
  • 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\eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe
    "C:\Users\Admin\AppData\Local\Temp\eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4564
    • C:\Users\Admin\AppData\Local\Temp\eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe
      "C:\Users\Admin\AppData\Local\Temp\eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.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:5032

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\eb2fe4029a0f9d3b2f5e3b9aafed5367667a94bdb288065969a4222c76d51c58.exe.log
        • Size 226B
        • SHA256 7e750c904c43d27c89e55af809a679a96c0bb63fc511006ffbceffc2c7f6fb7d
        • MD5 SHA1 SHA512

        memory/4564-124-0x00000000009F0000-0x0000000000B2A000-memory.dmp

        memory/5032-126-0x0000000000400000-0x0000000000486000-memory.dmp

        memory/5032-128-0x0000000005C80000-0x0000000005D12000-memory.dmp

        memory/5032-129-0x00000000062D0000-0x0000000006874000-memory.dmp

        memory/5032-130-0x0000000006EE0000-0x0000000006F46000-memory.dmp

        memory/5032-131-0x0000000007810000-0x0000000007860000-memory.dmp

        memory/5032-132-0x0000000005843000-0x0000000005845000-memory.dmp

        memory/5032-133-0x0000000007420000-0x000000000742A000-memory.dmp

        memory/5032-134-0x0000000007980000-0x0000000007A1C000-memory.dmp