Analysis

  • max time kernel
    136s
  • max time network
    140s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    29/03/2022, 19:25

General

  • Target
    1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe
  • Size 1.2MB
  • Sample220329-x4xc8sedcj
  • SHA256 1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38
  • MD5 SHA1 SHA512

Malware Config

Extracted

Credentials
  • Protocol

    smtp

  • Host

    bh-58.webhostbox.net

  • Port

    587

  • Password

    7213575aceACE@#

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 1 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 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe
    "C:\Users\Admin\AppData\Local\Temp\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:224
    • C:\Users\Admin\AppData\Local\Temp\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe
      "C:\Users\Admin\AppData\Local\Temp\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.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:3656
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2308

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\1df387bbcfc8d43b35a7f41993effb93d0a9676b2c30fc91639b4c62d36abf38.exe.log
        • Size 1KB
        • SHA256 e3ee6a044b6f017ce5c0607f32e71934d21e4a57a9b74eb4cf63b69baa2178bc
        • MD5 SHA1 SHA512

        memory/224-134-0x00000000053B0000-0x0000000005954000-memory.dmp

        memory/224-135-0x0000000004EA0000-0x0000000004F32000-memory.dmp

        memory/224-136-0x0000000004E90000-0x0000000004E9A000-memory.dmp

        memory/224-137-0x0000000007420000-0x0000000007470000-memory.dmp

        memory/224-138-0x0000000007750000-0x0000000007802000-memory.dmp

        memory/224-133-0x00000000004F0000-0x000000000061E000-memory.dmp

        memory/2308-154-0x00000000067C0000-0x00000000067DE000-memory.dmp

        memory/2308-151-0x0000000004D95000-0x0000000004D97000-memory.dmp

        memory/2308-161-0x0000000007850000-0x0000000007858000-memory.dmp

        memory/2308-160-0x0000000007870000-0x000000000788A000-memory.dmp

        memory/2308-159-0x0000000007760000-0x000000000776E000-memory.dmp

        memory/2308-146-0x00000000028E0000-0x0000000002916000-memory.dmp

        memory/2308-147-0x00000000053D0000-0x00000000059F8000-memory.dmp

        memory/2308-148-0x0000000005250000-0x0000000005272000-memory.dmp

        memory/2308-149-0x0000000005AB0000-0x0000000005B16000-memory.dmp

        memory/2308-150-0x0000000004FD0000-0x0000000004FEE000-memory.dmp

        memory/2308-158-0x00000000077B0000-0x0000000007846000-memory.dmp

        memory/2308-152-0x0000000006800000-0x0000000006832000-memory.dmp

        memory/2308-153-0x000000006F7E0000-0x000000006F82C000-memory.dmp

        memory/2308-157-0x00000000075B0000-0x00000000075BA000-memory.dmp

        memory/2308-155-0x0000000007BA0000-0x000000000821A000-memory.dmp

        memory/2308-156-0x0000000007540000-0x000000000755A000-memory.dmp

        memory/3656-140-0x0000000000400000-0x0000000000486000-memory.dmp

        memory/3656-145-0x0000000007450000-0x00000000074EC000-memory.dmp

        memory/3656-143-0x0000000005673000-0x0000000005675000-memory.dmp

        memory/3656-142-0x0000000006A80000-0x0000000006AE6000-memory.dmp