Analysis

  • max time kernel
    23s
  • max time network
    114s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    28/11/2020, 11:22

General

  • Target

    1e2b0143e30d4e5af0cfa521ad65c169.exe

  • Size

    583KB

  • MD5

    1e2b0143e30d4e5af0cfa521ad65c169

  • SHA1

    3bdb4191d641c0a7cb3b1a51bda0e8c50b0e517e

  • SHA256

    7ad2fda0cceebf5c2c83f30d7a1d38a25b74726f03099bb1a97371373d4eadcf

  • SHA512

    7c59904e76d93c6173f917ad8ffd88eb9ca1f6e221d3c87ffe55a66e86843ac06aad95aaf83159dc95600fd011502dd4b93cf5ef9f5b1b70a89c1b33f24e4b76

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\5FADD7138A\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> 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 11:18:50 AM MassLogger Started: 11/28/2020 11:18:43 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\1e2b0143e30d4e5af0cfa521ad65c169.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 4 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.

  • 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1e2b0143e30d4e5af0cfa521ad65c169.exe
    "C:\Users\Admin\AppData\Local\Temp\1e2b0143e30d4e5af0cfa521ad65c169.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Users\Admin\AppData\Local\Temp\1e2b0143e30d4e5af0cfa521ad65c169.exe
      "C:\Users\Admin\AppData\Local\Temp\1e2b0143e30d4e5af0cfa521ad65c169.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1784

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1740-2-0x00000000741A0000-0x000000007488E000-memory.dmp

    Filesize

    6.9MB

  • memory/1740-3-0x00000000000D0000-0x00000000000D1000-memory.dmp

    Filesize

    4KB

  • memory/1740-5-0x0000000000780000-0x00000000007F5000-memory.dmp

    Filesize

    468KB

  • memory/1740-6-0x0000000004710000-0x00000000047A4000-memory.dmp

    Filesize

    592KB

  • memory/1740-7-0x0000000000810000-0x0000000000826000-memory.dmp

    Filesize

    88KB

  • memory/1784-8-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1784-10-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1784-11-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1784-12-0x00000000741A0000-0x000000007488E000-memory.dmp

    Filesize

    6.9MB

  • memory/1784-15-0x0000000000620000-0x000000000065E000-memory.dmp

    Filesize

    248KB

  • memory/1784-16-0x0000000001FC0000-0x0000000001FCF000-memory.dmp

    Filesize

    60KB