Analysis

  • max time kernel
    117s
  • max time network
    133s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220310-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\5A22B5680F\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> User Name: Admin IP: 154.61.71.13 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: 3/27/2022 12:23:57 PM MassLogger Started: 3/27/2022 12:23:53 PM 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 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 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 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:4464
    • 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:3176

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/3176-141-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/3176-142-0x0000000005950000-0x00000000059EC000-memory.dmp

    Filesize

    624KB

  • memory/3176-143-0x0000000005AE0000-0x0000000005B46000-memory.dmp

    Filesize

    408KB

  • memory/3176-144-0x0000000005943000-0x0000000005945000-memory.dmp

    Filesize

    8KB

  • memory/3176-145-0x00000000076B0000-0x0000000007700000-memory.dmp

    Filesize

    320KB

  • memory/4464-134-0x0000000000B70000-0x0000000000C2E000-memory.dmp

    Filesize

    760KB

  • memory/4464-135-0x0000000005B10000-0x00000000060B4000-memory.dmp

    Filesize

    5.6MB

  • memory/4464-136-0x0000000005600000-0x0000000005692000-memory.dmp

    Filesize

    584KB

  • memory/4464-137-0x00000000055E0000-0x00000000055EA000-memory.dmp

    Filesize

    40KB

  • memory/4464-138-0x00000000076C0000-0x0000000007736000-memory.dmp

    Filesize

    472KB

  • memory/4464-139-0x0000000007830000-0x000000000784E000-memory.dmp

    Filesize

    120KB