General

  • Target
    3NTER.exe
  • Size 1.1MB
  • Sample261107-k9zdkab18k
  • SHA256 1dcc081671b33b3992e859d1ae4318fdccb0ca6044543f40a144fdf19fef2b3b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Botnet
  • 3o

C2
  • f3en305f3en-35578.portmap.host:305

  • f3en305f3en-35578.portmap.host:61793

  • anble3en-61793.portmap.host:305

  • anble3en-61793.portmap.host:61793

Attributes
  • delay

    1

  • install

    true

  • install_file

    svhost.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target
      3NTER.exe
    • Size 1.1MB
    • SHA256 1dcc081671b33b3992e859d1ae4318fdccb0ca6044543f40a144fdf19fef2b3b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Async RAT payload

    • Detects Umbral payload

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

    • Family: Umbral

      Umbral stealer is an open-source modular stealer written in C#.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Disables one or more Microsoft Defender components

      Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Disables automatic submission of suspicious files to Microsoft by Windows Defender

      Uses the Powershell Set-MpPreference cmdlet to prevent Windows Defender from automatically sending files to Microsoft for analysis.

    • Executes dropped EXE

    • 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.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v16

Tasks