Analysis

  • max time kernel
    4294181s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    27-03-2022 10:14

General

  • Target

    338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.exe

  • Size

    745KB

  • MD5

    fda8ea8e879680612ddf94866615773f

  • SHA1

    02d25911c9cc8337cece038dbc52bd6de9841219

  • SHA256

    338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934

  • SHA512

    f674658fb37e236fa7884d5b9735051d22b93ea14341dc62601e914a7988c0597488c14e39688ff1d630de1ebad0bf88cb7bb9d622dbe3925d7756256cd42b85

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\23C2295DA4\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> User Name: Admin IP: 154.61.71.51 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 3/27/2022 10:21:24 AM MassLogger Started: 3/27/2022 10:21:18 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.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 35 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.exe
    "C:\Users\Admin\AppData\Local\Temp\338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1044
    • C:\Users\Admin\AppData\Local\Temp\338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.exe
      "C:\Users\Admin\AppData\Local\Temp\338f675be1c7412047b0d16c39b30f2709879566fa60ef127513c3c049561934.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:1068

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1044-54-0x00000000009A0000-0x0000000000A5E000-memory.dmp

    Filesize

    760KB

  • memory/1044-55-0x0000000004FD0000-0x0000000005082000-memory.dmp

    Filesize

    712KB

  • memory/1044-56-0x0000000000760000-0x000000000077C000-memory.dmp

    Filesize

    112KB

  • memory/1068-57-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-58-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-60-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-61-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-62-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-65-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-67-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1068-68-0x0000000001FF0000-0x0000000002068000-memory.dmp

    Filesize

    480KB

  • memory/1068-69-0x0000000004CD5000-0x0000000004CE6000-memory.dmp

    Filesize

    68KB