Analysis

  • max time kernel
    150s
  • max time network
    180s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    16-05-2022 13:03

General

  • Target

    48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe

  • Size

    730KB

  • MD5

    2de9afcc1fbcca2ec17df764daad2ec4

  • SHA1

    7e0f715ef2f1a54de703c784ac1889707c1749e5

  • SHA256

    48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f

  • SHA512

    7046c17deae26114c1325cbf30cfb8e10f0c291c8b0d3253101ce33b04ad5e81b0100828ffa29f255288fbe6137de12ed799f185cd554f3afc4e916c7a23fce6

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\8236ADF044\Log.txt

Family

masslogger

Ransom Note
################################################################# MassLogger v2.0.0.0 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.50 Location: United States Windows OS: Microsoft Windows 10 Pro 64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Intel Core Processor (Broadwell) GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/16/2022 4:40:39 PM MassLogger Started: 5/16/2022 4:40:35 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Credentials

  • Protocol:
    smtp
  • Host:
    mail.privateemail.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    @Mexico1.,

Signatures

  • MassLogger

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

  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • 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 18 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.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe
    "C:\Users\Admin\AppData\Local\Temp\48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1072
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tLXEQKAnq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp146D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4152
    • C:\Users\Admin\AppData\Local\Temp\48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe
      "{path}"
      2⤵
        PID:2572
      • C:\Users\Admin\AppData\Local\Temp\48d9cb77f8ed388bfccf2d12b6f10f60c69d14b8559f5d545d31e443635e465f.exe
        "{path}"
        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:1476

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp146D.tmp

      Filesize

      1KB

      MD5

      f8257d4dfdcb1c3e946850e8298450b4

      SHA1

      8cb715e844ed3815d75416b542a0a1110806c0a2

      SHA256

      f96daabc2a1c5afefe630abc272f121783b1a4ea73830dc06ca483c92ad4b7f3

      SHA512

      f90a7886382196581180740784c6b6751502027d0bef199fe15bb896cd625887a6a537552d1bc504a587a6e9364dc44cfd1389b3dbf60cc9ad50be3edee6735d

    • memory/1072-130-0x00000000008A0000-0x000000000095C000-memory.dmp

      Filesize

      752KB

    • memory/1072-131-0x0000000005900000-0x0000000005EA4000-memory.dmp

      Filesize

      5.6MB

    • memory/1072-132-0x0000000005350000-0x00000000053E2000-memory.dmp

      Filesize

      584KB

    • memory/1072-133-0x0000000005300000-0x000000000530A000-memory.dmp

      Filesize

      40KB

    • memory/1072-134-0x0000000007820000-0x00000000078BC000-memory.dmp

      Filesize

      624KB

    • memory/1476-138-0x0000000000000000-mapping.dmp

    • memory/1476-139-0x0000000000400000-0x000000000048E000-memory.dmp

      Filesize

      568KB

    • memory/1476-140-0x0000000005630000-0x0000000005696000-memory.dmp

      Filesize

      408KB

    • memory/1476-141-0x0000000008310000-0x0000000008360000-memory.dmp

      Filesize

      320KB

    • memory/2572-137-0x0000000000000000-mapping.dmp

    • memory/4152-135-0x0000000000000000-mapping.dmp