Analysis

  • max time kernel
    91s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    20-05-2022 14:35

General

  • Target

    Purchase notes 5703.exe

  • Size

    1.1MB

  • MD5

    5a01e678188aae74b91464dad269ef65

  • SHA1

    791371f95a8f27965ad5513a419f7e1931c51567

  • SHA256

    730220c2835f81c8897f2bda68e8a4c700ca3e75cb05fb9a57e6b86c7ad7ad75

  • SHA512

    876fcf9c7d6792ccfe612b44f084cdabe17bfba5471aa9b69c348d56e41e329db24046e32bba34747147fe8037149910db6c76971aca40a9aab7d2638bfb9fa4

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\0F48153F20\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 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: 5/20/2022 4:11:48 PM MassLogger Started: 5/20/2022 4:11:45 PM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Purchase notes 5703.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> 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 ||> 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 5 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase notes 5703.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase notes 5703.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:324
    • C:\Users\Admin\AppData\Local\Temp\Purchase notes 5703.exe
      "C:\Users\Admin\AppData\Local\Temp\Purchase notes 5703.exe"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:5092

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/324-131-0x0000000000400000-0x0000000000524000-memory.dmp
    Filesize

    1.1MB

  • memory/5092-130-0x0000000000000000-mapping.dmp
  • memory/5092-132-0x0000000000C70000-0x0000000000D28000-memory.dmp
    Filesize

    736KB

  • memory/5092-133-0x0000000000C70000-0x0000000000D28000-memory.dmp
    Filesize

    736KB

  • memory/5092-134-0x0000000004E60000-0x0000000005404000-memory.dmp
    Filesize

    5.6MB

  • memory/5092-135-0x0000000004D40000-0x0000000004DDC000-memory.dmp
    Filesize

    624KB

  • memory/5092-136-0x0000000005490000-0x00000000054F6000-memory.dmp
    Filesize

    408KB

  • memory/5092-137-0x0000000005720000-0x00000000057B2000-memory.dmp
    Filesize

    584KB

  • memory/5092-138-0x0000000006960000-0x000000000696A000-memory.dmp
    Filesize

    40KB

  • memory/5092-139-0x0000000006790000-0x00000000067E0000-memory.dmp
    Filesize

    320KB