Analysis

  • max time kernel
    45s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    20-05-2022 14:22

General

  • Target

    Bank Statement_pdf.exe

  • Size

    899KB

  • MD5

    1c3985f5c3ad3e9a5394d093237ecd72

  • SHA1

    9d3c319ac9c93ed1227c7808f8a8a16b935a6fcf

  • SHA256

    e91593299dba4d7f9362c8d64e701413af0384f0f7ecca356ab138497f3a8e4d

  • SHA512

    3f3ce2ddac434d8bc8cb8f5c376b31e63d54ccfb809907542bb5b0f6094a01049ba6e15e20e5c6b3af815248e3ec6ea1993194b68eeb78743fd88c7ec5037511

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\8506BBE7FF\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.13 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: 5/20/2022 5:48:05 PM MassLogger Started: 5/20/2022 5:47:50 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Bank Statement_pdf.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> 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 Main Payload 2 IoCs
  • 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
  • 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 3 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bank Statement_pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Bank Statement_pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1984
    • C:\Users\Admin\AppData\Local\Temp\Bank Statement_pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\Bank Statement_pdf.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:1972

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1972-55-0x000000000053FAE0-mapping.dmp

  • memory/1972-57-0x0000000001E70000-0x0000000001F0A000-memory.dmp

    Filesize

    616KB

  • memory/1972-58-0x0000000001E70000-0x0000000001F0A000-memory.dmp

    Filesize

    616KB

  • memory/1972-60-0x00000000025A0000-0x00000000025E4000-memory.dmp

    Filesize

    272KB

  • memory/1972-61-0x0000000002145000-0x0000000002156000-memory.dmp

    Filesize

    68KB

  • memory/1972-62-0x0000000005A80000-0x0000000005A94000-memory.dmp

    Filesize

    80KB

  • memory/1984-54-0x00000000756E1000-0x00000000756E3000-memory.dmp

    Filesize

    8KB

  • memory/1984-56-0x0000000000400000-0x00000000004E7000-memory.dmp

    Filesize

    924KB