Analysis

  • max time kernel
    123s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    28/11/2020, 11:59

General

  • Target

    Document,PDF.com.exe

  • Size

    762KB

  • MD5

    b9ffffd93501391a2910e75c2ee0abe0

  • SHA1

    23a0b7c463d3682fa9a567b1f60b3943d44d3ef3

  • SHA256

    f4c976f3587362c6138a4dd309aabf2ec5c31f0ebe98b4618a2f52f145ce4a77

  • SHA512

    830cdf1c15cd19d66899a630d1bec09a5933ee76b0bb17a8025a48d0a650e2c1a23c4b14a47e757814d0474b05a75c4756ff9abbae52b1d15786432cf5cdb597

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\5FADD7138A\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: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 11/28/2020 11:56:21 AM MassLogger Started: 11/28/2020 11:56:15 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Document,PDF.com.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| Window Searcher ||> Disabled <|| Downloader ||> 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.

  • 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 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Document,PDF.com.exe
    "C:\Users\Admin\AppData\Local\Temp\Document,PDF.com.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:800
    • C:\Users\Admin\AppData\Local\Temp\Document,PDF.com.exe
      "C:\Users\Admin\AppData\Local\Temp\Document,PDF.com.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1628

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/800-2-0x00000000746D0000-0x0000000074DBE000-memory.dmp

    Filesize

    6.9MB

  • memory/800-3-0x0000000000DD0000-0x0000000000DD1000-memory.dmp

    Filesize

    4KB

  • memory/800-5-0x0000000005380000-0x0000000005435000-memory.dmp

    Filesize

    724KB

  • memory/800-6-0x0000000000800000-0x0000000000816000-memory.dmp

    Filesize

    88KB

  • memory/1628-7-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1628-9-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1628-10-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/1628-11-0x00000000746D0000-0x0000000074DBE000-memory.dmp

    Filesize

    6.9MB

  • memory/1628-14-0x00000000004C0000-0x0000000000531000-memory.dmp

    Filesize

    452KB