General

  • Target
    Solara_Updater.exe
  • Size 1.9MB
  • Sample240519-tpx5faef98
  • SHA256 4a10203f9773e4a4f5173a3d1840461bed2b6c206e16b47543bb127a541192bf
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • xworm

C2
  • answer-riverside.gl.at.ply.gg:45691

Attributes
  • Install_directory

    %AppData%

  • install_file

    svhost.exe

Extracted

Family
  • umbral

C2
  • https://discordapp.com/api/webhooks/1239665745831530598/iJT0OELt4O4igXW_VMu-CUIfcqaawXLhyC4Bruuv1t2x0XOvC0_p9dc-G_RxJMO7fn-V

Targets

    • Target
      Solara_Updater.exe
    • Size 1.9MB
    • SHA256 4a10203f9773e4a4f5173a3d1840461bed2b6c206e16b47543bb127a541192bf
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Umbral payload

    • Detect Xworm Payload

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Command and Scripting Interpreter: PowerShell

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

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • 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

MITRE ATT&CK Enterprise v15

Tasks