Analysis

  • max time kernel
    175s
  • max time network
    182s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    14/04/2022, 13:40

General

  • Target

    c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe

  • Size

    3.6MB

  • MD5

    8a4242d7f73d7dcbebc6c64e56fdf8c7

  • SHA1

    b974408e0879b1a2bce0bb9b95e6191d83f64ca2

  • SHA256

    c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0

  • SHA512

    405eab4cad3965f225fb4e34cd877aeedf1e9f860c0f515f368b55b7d7d9a52e3806b737ef5dcb382a62ca815b788b0f3fa603fa8e7de47bc02cc6559110a258

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\A481D1992D\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> User Name: Admin IP: 127.0.0.1 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: 4/14/2022 5:04:06 PM MassLogger Started: 4/14/2022 5:03:30 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Downloader ||> Disabled <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Search And Upload ||> Disabled <|| Telegram Desktop ||> Not Installed <|| Pidgin ||> Not Installed <|| FileZilla ||> Not Installed <|| Discord Tokken ||> Not Installed <|| NordVPN ||> Not Installed <|| Outlook ||> Not Installed <|| FoxMail ||> Not Installed <|| Thunderbird ||> Not Installed <|| FireFox ||> Not Found <|| QQ Browser ||> Not Installed <|| Chromium Recovery ||> Not Installed or Not Found <|| Keylogger And Clipboard ||> NA

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 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 8 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\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe
    "C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe
      "C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe"
      2⤵
        PID:1280
      • C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe
        "C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe"
        2⤵
          PID:4656
        • C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.exe
          "C:\Users\Admin\AppData\Local\Temp\c9a8b16591a76cfdccc1a84fae7ec51c02e42e41e2ef8923319692cd2a4f65d0.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:4256

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/4256-131-0x0000000000400000-0x00000000004B8000-memory.dmp

        Filesize

        736KB

      • memory/4256-132-0x0000000005440000-0x00000000054DC000-memory.dmp

        Filesize

        624KB

      • memory/4256-133-0x00000000055D0000-0x0000000005636000-memory.dmp

        Filesize

        408KB

      • memory/4256-134-0x0000000005393000-0x0000000005395000-memory.dmp

        Filesize

        8KB

      • memory/4256-135-0x0000000007480000-0x00000000074D0000-memory.dmp

        Filesize

        320KB

      • memory/5096-124-0x0000000000410000-0x00000000007B6000-memory.dmp

        Filesize

        3.6MB

      • memory/5096-125-0x00000000057E0000-0x0000000005D84000-memory.dmp

        Filesize

        5.6MB

      • memory/5096-126-0x0000000005150000-0x00000000051E2000-memory.dmp

        Filesize

        584KB

      • memory/5096-127-0x0000000005200000-0x000000000520A000-memory.dmp

        Filesize

        40KB