Extracted

• • Target

    riomultitool.exe

  • Size

    557KB

  • MD5

    903b9e6bdaf8721d44891f5da47fb6e5

  • SHA1

    4dde5721fbba23c63bf9ca62ec93a5ad72e6789d

  • SHA256

    c0351dccf1117ee1924671a77fa67db75d05a4be5297cee995d6ebfcb6f71587

  • SHA512

    006c1b8d1aebbdc0217cb6c44023e8e1a9916d82fa436ac5b065443b17f13da558039fa9a432e3790e6b8bb8aa6979e14122412815d5987b9fb693bf51312927

  • SSDEEP

    12288:PFUNDaqoZtL+EP8ty4/IuphChn6opNsie2hy:PFOauI8E4/IuphChn6opNsiHy

  Score

  10^/10

  umbralcredential_accessdiscoveryevasionexecutionpersistencespywarestealer

  • Detect Umbral payload

  • Modifies visiblity of hidden/system files in Explorer

    evasion

  • Umbral

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

    stealerumbral

  • Credentials from Password Stores: Credentials from Web Browsers

    Malicious Access or copy of Web Browser Credential store.

    credential_accessstealer

  • 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

  • Loads dropped DLL

  • 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.

  • Drops file in System32 directory

  behavioral1behavioral2