Analysis

  • max time kernel
    71s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 02:37

General

  • Target

    Sales note PO53.exe

  • Size

    861KB

  • MD5

    3e414d89b9f98f4cc6c5988634791c0a

  • SHA1

    fd7d1e1c6b49b97db475ccc56958bee3964ad766

  • SHA256

    1c2f10aaf4e8b9a9e90316e8b470616bac893609cd85374cb11bb4a1a3971e5b

  • SHA512

    a7781136e267d2549d9f248830951170f4b6eaabbaa212df3307362a895414ae85ece41c25d1256e09302d5b1c603ca45d1e1753dac85ed5493acb2b8cbe6508

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\79FE0CC911\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: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 3:55:39 AM MassLogger Started: 5/21/2022 3:55:29 AM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Sales note PO53.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> Disabled <|| Downloader ||> Disabled <|| Bot Killer ||> Disabled <|| Window Searcher ||> 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 ||> Disabled

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
  • 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: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 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\Sales note PO53.exe
    "C:\Users\Admin\AppData\Local\Temp\Sales note PO53.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2044
    • C:\Users\Admin\AppData\Local\Temp\Sales note PO53.exe
      "{path}"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:1648

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1648-64-0x0000000000494ADE-mapping.dmp

  • memory/1648-62-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-72-0x00000000006E0000-0x00000000006F4000-memory.dmp

    Filesize

    80KB

  • memory/1648-71-0x0000000000C55000-0x0000000000C66000-memory.dmp

    Filesize

    68KB

  • memory/1648-58-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-59-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-69-0x0000000000700000-0x0000000000744000-memory.dmp

    Filesize

    272KB

  • memory/1648-63-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-61-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-68-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/1648-66-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/2044-54-0x00000000012B0000-0x000000000138E000-memory.dmp

    Filesize

    888KB

  • memory/2044-55-0x0000000075441000-0x0000000075443000-memory.dmp

    Filesize

    8KB

  • memory/2044-57-0x0000000005650000-0x00000000056F2000-memory.dmp

    Filesize

    648KB

  • memory/2044-56-0x00000000008B0000-0x00000000008B8000-memory.dmp

    Filesize

    32KB