Analysis

  • max time kernel
    138s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 02:09

General

  • Target

    Purchase Order.exe

  • Size

    998KB

  • MD5

    c4eb73549663f5a0925826350281a9f7

  • SHA1

    6baef77aa43f56c23aa48b19ee7acec0f27213ec

  • SHA256

    d7269fff7321b7254a2a6ce7e6fb9b8347d73cb78597d73412b8d21344832e81

  • SHA512

    2ebeb53cf5229077d96b8bb2f93e7694baaa420d3c719c7156d9d28b1bf1f168da9bd2b095f3d0569dea2eef1a171609f538bfa95d02f0f596c6c3c429ef7f6e

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\F95B724EDE\Log.txt

Family

masslogger

Ransom Note
<|| v2.3.0.0 ||> 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 5:14:43 AM MassLogger Started: 5/21/2022 5:14:32 AM Interval: 96 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes: <|| WD Exclusion ||> Disabled <|| Binder ||> Disabled <|| USB Spread ||> 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 Main Payload 1 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Checks computer location settings 2 TTPs 2 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 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4116
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fRHcKmAof" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF2CC.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:364
    • C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
      "{path}"
      2⤵
        PID:936
      • C:\Users\Admin\AppData\Local\Temp\Purchase Order.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:1456

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpF2CC.tmp

      Filesize

      1KB

      MD5

      f5533fda8385e4e1773500306a02f505

      SHA1

      ee8e46e91e47d599902f8c5ed5a24421d202a406

      SHA256

      5b5122aacfa6809a65fe553de715cbbd34d13b6f172102b281dceba746d23e03

      SHA512

      80f15bf4350e1a197c0f3d8a97c769c20275e5286c238fa404dddef226de8e58a74163254ec82fe23027b0f19a911bd6339eedb408f831664dc843900a6e2143

    • memory/364-134-0x0000000000000000-mapping.dmp

    • memory/936-136-0x0000000000000000-mapping.dmp

    • memory/1456-137-0x0000000000000000-mapping.dmp

    • memory/1456-138-0x0000000000400000-0x00000000004C6000-memory.dmp

      Filesize

      792KB

    • memory/1456-139-0x0000000005760000-0x00000000057C6000-memory.dmp

      Filesize

      408KB

    • memory/1456-140-0x0000000007040000-0x000000000704A000-memory.dmp

      Filesize

      40KB

    • memory/1456-141-0x00000000071E0000-0x0000000007230000-memory.dmp

      Filesize

      320KB

    • memory/4116-130-0x0000000000E90000-0x0000000000F90000-memory.dmp

      Filesize

      1024KB

    • memory/4116-131-0x0000000005B60000-0x0000000005BFC000-memory.dmp

      Filesize

      624KB

    • memory/4116-132-0x0000000005D70000-0x0000000005E02000-memory.dmp

      Filesize

      584KB

    • memory/4116-133-0x0000000006920000-0x0000000006EC4000-memory.dmp

      Filesize

      5.6MB