Analysis

  • max time kernel
    43s
  • max time network
    117s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    21-05-2022 11:01

General

  • Target

    Purchase Order.exe

  • Size

    1.1MB

  • MD5

    0d9f1b254725cd1375c8c2a8b12c7ab2

  • SHA1

    186b7c279999005af4dd955a89461ea77eae6499

  • SHA256

    8353cb4ec041596a1abfeaee6219d8fa495741ee8927674b6a248186de849db9

  • SHA512

    0e5293132e5a59a69e9969dc740cbb6dec33603888ce71ca53520fb2d44de50f45fdef15d4cbc4ffd2acfd1cf018c701fd28938376768ebb570435bb66536daf

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\79FE0CC911\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 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 11:16:07 AM MassLogger Started: 5/21/2022 11:15:56 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 <|| Window Searcher ||> Disabled <|| Bot Killer ||> Disabled <|| Downloader ||> 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 35 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
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 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 behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:1624
    • C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe
      "C:\Users\Admin\AppData\Local\Temp\Purchase Order.exe"
      2⤵
      • Checks computer location settings
      • Accesses Microsoft Outlook profiles
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • outlook_office_path
      • outlook_win_path
      PID:916

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/916-55-0x0000000000580A80-mapping.dmp
  • memory/916-57-0x0000000001EF0000-0x0000000001FA8000-memory.dmp
    Filesize

    736KB

  • memory/916-58-0x0000000001EF0000-0x0000000001FA8000-memory.dmp
    Filesize

    736KB

  • memory/916-60-0x0000000004AF0000-0x0000000004B68000-memory.dmp
    Filesize

    480KB

  • memory/916-61-0x0000000004C45000-0x0000000004C56000-memory.dmp
    Filesize

    68KB

  • memory/1624-54-0x0000000075C71000-0x0000000075C73000-memory.dmp
    Filesize

    8KB

  • memory/1624-56-0x0000000000400000-0x0000000000524000-memory.dmp
    Filesize

    1.1MB