Analysis

  • max time kernel
    170s
  • max time network
    184s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220331-en
  • submitted
    14-04-2022 13:36

General

  • Target

    3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe

  • Size

    1.4MB

  • MD5

    b7890da54f9e83507f1316e9198fa9c8

  • SHA1

    7367430eba6c00c6a459c7aaec5326527c7097b1

  • SHA256

    3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93

  • SHA512

    ba1108c728d61bfd4dfa965e233f36799970b4dfb296d6aa4f3be741d51d30787c0afe521129a9e3bb015400be7f1be789395e5a78440a56603af038eb8746a2

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\57B82846A9\Log.txt

Family

masslogger

Ransom Note
<|| v2.4.0.0 ||> User Name: Admin IP: 127.0.0.1 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: 4/14/2022 4:56:03 PM MassLogger Started: 4/14/2022 4:55:33 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.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 ||> 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.

  • Accesses Microsoft Outlook profiles 1 TTPs 42 IoCs
  • 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 8 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe
    "C:\Users\Admin\AppData\Local\Temp\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4948
    • C:\Users\Admin\AppData\Local\Temp\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe
      "C:\Users\Admin\AppData\Local\Temp\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • outlook_office_path
      • outlook_win_path
      PID:4328

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\3d44d7bea2dcf261e79424004a4e05c721ce1d8fe4fd7c5b0785d6fbf4a17c93.exe.log

    Filesize

    700B

    MD5

    73f7cf0cc0d233587dab42e5f96d3055

    SHA1

    bd4763dec908b33d502e1ad6528e5b3b6d556849

    SHA256

    42950caa27b247f877d372f7afeb4e1f30843d7668489881d0d3a5fc1fda8a44

    SHA512

    d6d7c6812bd9f138570499974e90052e7929fdfe18c5915d5de7ccf926e17290bca03b03102e3396f30d2281e405d5047de50074e5e7bc5dc9d7474590701782

  • memory/4328-133-0x0000000005580000-0x0000000005612000-memory.dmp

    Filesize

    584KB

  • memory/4328-129-0x0000000000400000-0x00000000004B8000-memory.dmp

    Filesize

    736KB

  • memory/4328-131-0x0000000005160000-0x00000000051FC000-memory.dmp

    Filesize

    624KB

  • memory/4328-132-0x0000000005270000-0x00000000052D6000-memory.dmp

    Filesize

    408KB

  • memory/4328-134-0x00000000068D0000-0x00000000068DA000-memory.dmp

    Filesize

    40KB

  • memory/4328-135-0x0000000005153000-0x0000000005155000-memory.dmp

    Filesize

    8KB

  • memory/4328-136-0x0000000006AF0000-0x0000000006B40000-memory.dmp

    Filesize

    320KB

  • memory/4948-126-0x0000000004B80000-0x0000000004BF6000-memory.dmp

    Filesize

    472KB

  • memory/4948-127-0x0000000004EF0000-0x0000000004F0E000-memory.dmp

    Filesize

    120KB

  • memory/4948-125-0x00000000050B0000-0x0000000005654000-memory.dmp

    Filesize

    5.6MB

  • memory/4948-124-0x0000000000050000-0x00000000001B8000-memory.dmp

    Filesize

    1.4MB