Analysis

  • max time kernel
    115s
  • max time network
    106s
  • platform
    windows7_x64
  • resource
    win7-20220414-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\8506BBE7FF\Log.txt

Family

masslogger

Ransom Note
<|| v2.3.0.0 ||> User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 7 Ultimate 64bit Windows Serial Key: D4F6K-QK3RD-TMVMJ-BBMRX-3MBMV CPU: Intel Core Processor (Broadwell) GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 5/21/2022 5:13:36 AM MassLogger Started: 5/21/2022 5:13:15 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 6 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 35 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
  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 13 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⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1240
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\fRHcKmAof" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3A63.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1376
    • 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:1604

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp3A63.tmp

    Filesize

    1KB

    MD5

    174a6e7c45770e4e020e01b34147ce0a

    SHA1

    93df9d70655e715b7d497075d6bee44d7b5cb153

    SHA256

    198d53a1a99ddf097cb967ef139fe2efbd88255ef3b6d36a372e130a3124d9a4

    SHA512

    a3c84bf8da7e8547bc85b7efc46a9654a82f7196690d0a56675689fe22da20b66a86f44a61242dc0ab54e6d07de20ac64cf091bb85b335bb1253c1603af89e7a

  • memory/1240-54-0x0000000000E30000-0x0000000000F30000-memory.dmp

    Filesize

    1024KB

  • memory/1240-55-0x0000000000270000-0x0000000000278000-memory.dmp

    Filesize

    32KB

  • memory/1240-56-0x00000000056D0000-0x000000000579C000-memory.dmp

    Filesize

    816KB

  • memory/1376-57-0x0000000000000000-mapping.dmp

  • memory/1604-63-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-60-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-62-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-59-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-64-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-65-0x00000000004C005E-mapping.dmp

  • memory/1604-67-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-69-0x0000000000400000-0x00000000004C6000-memory.dmp

    Filesize

    792KB

  • memory/1604-70-0x0000000000DA0000-0x0000000000E18000-memory.dmp

    Filesize

    480KB

  • memory/1604-71-0x00000000753E1000-0x00000000753E3000-memory.dmp

    Filesize

    8KB

  • memory/1604-72-0x0000000004465000-0x0000000004476000-memory.dmp

    Filesize

    68KB

  • memory/1604-73-0x0000000000890000-0x00000000008A4000-memory.dmp

    Filesize

    80KB