General

  • Target
    4-5114-HT.exe
  • Size 818KB
  • Sample201109-47gf4mcv32
  • SHA256 81ae80d0dc7e949cd78a6b555c1b08ebd8ec89ecf9847f3d1c0d9790b11be355
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\Users\Admin\AppData\Local\Temp\60F5850B53\Log.txt

  • masslogger

Ransom Note
  • ################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 7 Professional 64bit Windows Serial Key: HYF8J-CVRMY-CM74G-RPHKF-PW487 CPU: Persocon Processor 2.5+ GPU: Standard VGA Graphics Adapter AV: NA Screen Resolution: 1280x720 Current Time: 11/11/2020 5:21:51 AM MassLogger Started: 11/11/2020 5:21:41 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\4-5114-HT.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Extracted

Path
  • C:\Users\Admin\AppData\Local\Temp\7C372DB998\Log.txt

  • masslogger

Ransom Note
  • ################################################################# MassLogger v1.3.7.1 ################################################################# ### Logger Details ### User Name: Admin IP: 154.61.71.13 Location: United States Windows OS: Microsoft Windows 10 Pro64bit Windows Serial Key: W269N-WFGWX-YVC9B-4J6C9-T83GX CPU: Persocon Processor 2.5+ GPU: Microsoft Basic Display Adapter AV: NA Screen Resolution: 1280x720 Current Time: 11/11/2020 5:22:04 AM MassLogger Started: 11/11/2020 5:21:51 AM Interval: 2 hour MassLogger Process: C:\Users\Admin\AppData\Local\Temp\4-5114-HT.exe MassLogger Melt: false MassLogger Exit after delivery: false As Administrator: True Processes:

Targets

    • Target
      4-5114-HT.exe
    • Size 818KB
    • SHA256 81ae80d0dc7e949cd78a6b555c1b08ebd8ec89ecf9847f3d1c0d9790b11be355
    • MD5 SHA1 SHA512
    • MassLogger

      Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

    • MassLogger Main Payload

    • MassLogger log file

      Detects a log file produced by MassLogger.

    • rezer0

      Detects ReZer0, a packer with multiple versions used in various campaigns.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Looks up external IP address via web service

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks