General

  • Target

    https://cdn.discordapp.com/attachments/1247299953315938336/1280271915197399113/speed.exe?ex=66d779a2&is=66d62822&hm=defe9cb6339053d13138dfdfd917bacbdbc2fb89a8994d2ccd0ed577b2bfa76c&

  • Sample

    240902-zylqnayblg

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1279926585402593512/-p7sFnb_2x6CbCygjElBC0Haj-3_Y2RxDPvXsumD8jWDE7C7BvP3uhfi8a5Z45S9Whkt

Targets

    • Target

      https://cdn.discordapp.com/attachments/1247299953315938336/1280271915197399113/speed.exe?ex=66d779a2&is=66d62822&hm=defe9cb6339053d13138dfdfd917bacbdbc2fb89a8994d2ccd0ed577b2bfa76c&

    • Skuld stealer

      An info stealer written in Go lang.

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Command and Scripting Interpreter: PowerShell

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

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Executes dropped EXE

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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.

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Network Service Discovery

      Attempt to gather information on host's network.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

MITRE ATT&CK Enterprise v15

Tasks