Analysis

  • max time kernel
    153s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 12:30

General

  • Target

    PAYMENT.exe

  • Size

    570KB

  • MD5

    fcec6c7bdf33a7154f7b569495fc6e7c

  • SHA1

    afa9dae1b5575371f54eafa93c17ec10c79ec21c

  • SHA256

    c1eb825c340f71f623701f1bd53ecdc89ffc44a7598f51efc6c1febb8e6439e6

  • SHA512

    64e587d36f93d44edc322fc4f9aae8a743574c5252c7be113641f9613e68fa8f802fe56f0b83f82d0d48bbc40e259a45e7604e119f65ead7265e532508b06dd3

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\F293CD6622\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: 5/21/2022 2:39:17 PM MassLogger Started: 5/21/2022 2:38:56 PM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\PAYMENT.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 Main Payload 1 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.

  • 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: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PAYMENT.exe
    "C:\Users\Admin\AppData\Local\Temp\PAYMENT.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2388
    • C:\Users\Admin\AppData\Local\Temp\PAYMENT.exe
      "C:\Users\Admin\AppData\Local\Temp\PAYMENT.exe"
      2⤵
        PID:2260
      • C:\Users\Admin\AppData\Local\Temp\PAYMENT.exe
        "C:\Users\Admin\AppData\Local\Temp\PAYMENT.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:4812

    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

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

      1KB

      MD5

      64db62f1fcd6f05a3298e223fe336792

      SHA1

      c71bec9b3dbb6ec42e03ea82a9de0ad85ddbe54e

      SHA256

      48e2648284e19b36808a8979cfd32e0e272bc52446854784328343912c808989

      SHA512

      222caa4f30f905b008651506122d7b1c4119277d9cdb69aa3bf3ea911285f94176f257d9f76d4a5097b501d097910e1fea78eaaab9b00543e16b573fba618228

    • memory/2260-137-0x0000000000000000-mapping.dmp
    • memory/2388-136-0x0000000008A50000-0x0000000008AB6000-memory.dmp
      Filesize

      408KB

    • memory/2388-133-0x0000000004DA0000-0x0000000004DAA000-memory.dmp
      Filesize

      40KB

    • memory/2388-134-0x00000000087B0000-0x0000000008826000-memory.dmp
      Filesize

      472KB

    • memory/2388-135-0x0000000008730000-0x000000000874E000-memory.dmp
      Filesize

      120KB

    • memory/2388-130-0x0000000000360000-0x00000000003F4000-memory.dmp
      Filesize

      592KB

    • memory/2388-132-0x0000000004E00000-0x0000000004E92000-memory.dmp
      Filesize

      584KB

    • memory/2388-131-0x00000000053B0000-0x0000000005954000-memory.dmp
      Filesize

      5.6MB

    • memory/4812-138-0x0000000000000000-mapping.dmp
    • memory/4812-139-0x0000000000400000-0x00000000004B8000-memory.dmp
      Filesize

      736KB

    • memory/4812-141-0x00000000050C0000-0x000000000515C000-memory.dmp
      Filesize

      624KB

    • memory/4812-142-0x0000000006FB0000-0x0000000007000000-memory.dmp
      Filesize

      320KB