Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-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\F95B724EDE\Log.txt

Family

masslogger

Ransom Note
<|| v2.1.0.0 ||> User Name: Admin IP: 154.61.71.50 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: 5/21/2022 5:55:15 AM MassLogger Started: 5/21/2022 5:55:12 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 <|| Downloader ||> Disabled <|| USB Spread ||> 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 ||> 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 42 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 8 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:3016
    • 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:4044

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\Sales note PO53.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

  • memory/3016-130-0x0000000000230000-0x000000000030E000-memory.dmp

    Filesize

    888KB

  • memory/3016-131-0x0000000005290000-0x0000000005834000-memory.dmp

    Filesize

    5.6MB

  • memory/3016-132-0x0000000004CE0000-0x0000000004D72000-memory.dmp

    Filesize

    584KB

  • memory/3016-133-0x0000000004CB0000-0x0000000004CBA000-memory.dmp

    Filesize

    40KB

  • memory/3016-134-0x0000000007490000-0x000000000752C000-memory.dmp

    Filesize

    624KB

  • memory/4044-135-0x0000000000000000-mapping.dmp

  • memory/4044-136-0x0000000000400000-0x000000000049A000-memory.dmp

    Filesize

    616KB

  • memory/4044-138-0x00000000053A0000-0x0000000005406000-memory.dmp

    Filesize

    408KB

  • memory/4044-139-0x0000000006E80000-0x0000000006ED0000-memory.dmp

    Filesize

    320KB