Extracted

• • Target

    Best.exe

  • Size

    2.6MB

  • MD5

    ffbd4856b9514f0db9d1f06f51060dd2

  • SHA1

    86a0418a6672754326fe146e68b2db56eae01710

  • SHA256

    be51fb720bcc14fbce1a3360295390290d99921216acc8979fd64e85fa5afff0

  • SHA512

    dc66c8607aec4390f882e796ed8936038cd9db230cf9ce2c5c9779c225b427afe56a593a7c7c0a96657e9d12da1f79da48f3b2ea4c2ee052f1e213bc61b6144a

  • SSDEEP

    49152:PVxkczo+Et3EczvDrtkm3wmTwGyNqXhp3z182x0r8HQ4PhrYLg8hVYMz+PT:9E+YplNwGyNm3Z/x0wCX

  Score

  10^/10

  umbralexecutionpersistencespywarestealer

  • Detect Umbral payload

  • Umbral

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

    stealerumbral

  • Umbral family

    umbral

  • Command and Scripting Interpreter: PowerShell

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

    execution

  • Drops file in Drivers directory

  • Executes dropped EXE

  • Reads user/profile data of web browsers

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

    spywarestealer

  • Adds Run key to start application

    persistence

  • 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.

  behavioral1