General

  • Target

    https://filelu.com/gkf7je1dsruo

  • Sample

    240820-qekjtatbrc

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1273246180444213339/WD3g0fluQYzUEWJLGktGciLgxDNO7vpGOtwr_MbBkj1p4dQ1E_yVhpKFXenzjoh7wM3K

https://discord.com/api/webhooks/1271643069317644288/Yi3JdjrXJ2C95angH0OndOPpWxWydgLtEZVOUV6s32Pf81SxCWBNaV19zjvPX6j0yW0O

Targets

    • Detect Umbral payload

    • Umbral

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Drops startup file

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    • 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.

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v15

Tasks