Analysis

  • max time kernel
    132s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    15-04-2022 08:56

General

  • Target

    76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe

  • Size

    661KB

  • MD5

    bd3418b1fef079b20bee903645a3a1e6

  • SHA1

    f4914dae7b7677f527b39ed6a581849d2c64fd96

  • SHA256

    76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba

  • SHA512

    6f226069eca220ff74263d99e0ec284b6390a7a598f52002b4a0c3064f0af9aa44756047e4266528b50a2d3ecb9892359fec0768c0f28ffd8c171b4721363570

Malware Config

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    bh-58.webhostbox.net
  • Port:
    587
  • Username:
    [email protected]
  • 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 2 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
  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe
    "C:\Users\Admin\AppData\Local\Temp\76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2564
    • C:\Users\Admin\AppData\Local\Temp\76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe
      "C:/Users/Admin/AppData/Local/Temp/76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.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:3248
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe'
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4084
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c copy "C:/Users/Admin/AppData/Local/Temp/76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba.exe" "%temp%\FolderN\name.exe" /Y
      2⤵
        PID:5072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "%temp%\FolderN\name.exe.lnk" /f
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:4116
        • C:\Windows\SysWOW64\reg.exe
          reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe.lnk" /f
          3⤵
            PID:4056
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c echo [zoneTransfer]ZoneID = 2 > %temp%\FolderN\name.exe:Zone.Identifier
          2⤵
          • NTFS ADS
          PID:3392
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe.bat
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1432
          • C:\Windows\SysWOW64\timeout.exe
            timeout /t 300
            3⤵
            • Delays execution with timeout.exe
            PID:3808

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe

        Filesize

        661KB

        MD5

        bd3418b1fef079b20bee903645a3a1e6

        SHA1

        f4914dae7b7677f527b39ed6a581849d2c64fd96

        SHA256

        76c77083a255a33c0f87189398ea25c36d313b1f79ad85304986312a724b58ba

        SHA512

        6f226069eca220ff74263d99e0ec284b6390a7a598f52002b4a0c3064f0af9aa44756047e4266528b50a2d3ecb9892359fec0768c0f28ffd8c171b4721363570

      • C:\Users\Admin\AppData\Local\Temp\FolderN\name.exe.bat

        Filesize

        204B

        MD5

        bfcbf382f036462e63f307ca4ae280c7

        SHA1

        ffe98d15fa5ea205220d6bc105e317253a6ea003

        SHA256

        2c3dd84c3ce3e529117e611d8caf4fc7f5a902840350f4ca524c251a2152c727

        SHA512

        1b912652cc989541b396df5fd6bf207a4cf4ed891dc6e3223b8d0497c19a2589cb644c4c96ca01d882a7643f240c566966d84e46d77e9ad33e05214f8f553d16

      • memory/1432-140-0x0000000000000000-mapping.dmp

      • memory/2564-131-0x0000000005800000-0x000000000589C000-memory.dmp

        Filesize

        624KB

      • memory/2564-130-0x0000000000E20000-0x0000000000ECC000-memory.dmp

        Filesize

        688KB

      • memory/3248-134-0x0000000000500000-0x0000000000586000-memory.dmp

        Filesize

        536KB

      • memory/3248-147-0x00000000066C0000-0x0000000006710000-memory.dmp

        Filesize

        320KB

      • memory/3248-148-0x0000000006690000-0x000000000669A000-memory.dmp

        Filesize

        40KB

      • memory/3248-149-0x0000000004A23000-0x0000000004A25000-memory.dmp

        Filesize

        8KB

      • memory/3248-144-0x00000000054C0000-0x0000000005A64000-memory.dmp

        Filesize

        5.6MB

      • memory/3248-132-0x0000000000000000-mapping.dmp

      • memory/3248-145-0x0000000005D60000-0x0000000005DC6000-memory.dmp

        Filesize

        408KB

      • memory/3248-143-0x0000000004E70000-0x0000000004F02000-memory.dmp

        Filesize

        584KB

      • memory/3392-139-0x0000000000000000-mapping.dmp

      • memory/3808-142-0x0000000000000000-mapping.dmp

      • memory/4056-137-0x0000000000000000-mapping.dmp

      • memory/4084-155-0x00000000067B0000-0x00000000067E2000-memory.dmp

        Filesize

        200KB

      • memory/4084-156-0x000000006F500000-0x000000006F54C000-memory.dmp

        Filesize

        304KB

      • memory/4084-165-0x0000000007820000-0x0000000007828000-memory.dmp

        Filesize

        32KB

      • memory/4084-150-0x0000000004C10000-0x0000000004C46000-memory.dmp

        Filesize

        216KB

      • memory/4084-151-0x00000000053D0000-0x00000000059F8000-memory.dmp

        Filesize

        6.2MB

      • memory/4084-152-0x0000000005350000-0x0000000005372000-memory.dmp

        Filesize

        136KB

      • memory/4084-153-0x0000000005A70000-0x0000000005AD6000-memory.dmp

        Filesize

        408KB

      • memory/4084-154-0x00000000061F0000-0x000000000620E000-memory.dmp

        Filesize

        120KB

      • memory/4084-146-0x0000000000000000-mapping.dmp

      • memory/4084-164-0x0000000007840000-0x000000000785A000-memory.dmp

        Filesize

        104KB

      • memory/4084-157-0x0000000006790000-0x00000000067AE000-memory.dmp

        Filesize

        120KB

      • memory/4084-158-0x0000000004D95000-0x0000000004D97000-memory.dmp

        Filesize

        8KB

      • memory/4084-159-0x0000000007B40000-0x00000000081BA000-memory.dmp

        Filesize

        6.5MB

      • memory/4084-160-0x00000000074F0000-0x000000000750A000-memory.dmp

        Filesize

        104KB

      • memory/4084-161-0x0000000007560000-0x000000000756A000-memory.dmp

        Filesize

        40KB

      • memory/4084-162-0x0000000007750000-0x00000000077E6000-memory.dmp

        Filesize

        600KB

      • memory/4084-163-0x0000000007730000-0x000000000773E000-memory.dmp

        Filesize

        56KB

      • memory/4116-136-0x0000000000000000-mapping.dmp

      • memory/5072-135-0x0000000000000000-mapping.dmp