Extracted

• • Target
    Umbral.exe
  • Size 229KB
  • SHA256 c893e3eab53f77d9e8a9cc0d2fd6fa140939ee7f3c79f6f9ead458b19db8afdd
  • MD5 18361df906415ffc8d72b7d786793ab2
  • SHA1 01d9858285965762a56126ab60f0eaf86327d0b3
  • SHA512 d9cc3629e88fb26071ba3f9b29ad22a955ee1ca28c4389d47161e09ebbb6bc30ac9af8649abb7b311a195c9d6d536debbc380ed438b1c5e5a32681ac74fba2c2
  • SSDEEP 6144:lloZMhrIkd8g+EtXHkv/iD4DGd4NSQPL4KBECDjafMb8e1mCi:noZiL+EP8DGGNSQPL4KBECDja0s
  • TLSH
    T168346C5937B88B17E25F8BBDD5B1148F87B2F103E90AF78E0C8895E82412742E949E57
  • MD5 SHA1 SHA512 SSDEEP TLSH

  Score

  10^/10

  defense_evasiondiscoveryexecutionumbralspywarestealer

  • Detects Umbral payload

  • Family: Umbral

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

    stealerumbral

  • Command and Scripting Interpreter: PowerShell

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

    execution

  • Command and Scripting Interpreter: PowerShell

    Using powershell.exe command.

    execution

  • Disables one or more Microsoft Defender components

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

    defense_evasion

  • Drops file in Drivers directory

  • 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.

    defense_evasion

  • Reads user/profile data of web browsers

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

    spywarestealer

  • Contacts third-party web service commonly abused for C2

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • Looks up external IP address via web service

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

    discovery
  behavioral1behavioral2