General

  • Target

    Bootstrapper.exe

  • Size

    13.2MB

  • Sample

    240813-fcm7tazcqr

  • MD5

    a20c7241b0483b3673b17d42ad9987ea

  • SHA1

    45a38459e0dad54433243a45e5b53fdfe48c333a

  • SHA256

    0d64d6c344e5278118e4dc6e91036dc2211bae692d36dfd085c47940b42c768e

  • SHA512

    2e7131f1f50b15005cee38d5bfcc77a20ad303e45935dc22664f4b49ad8f8ef459331c7089a44b348c4986076367d425c8e9e40aaa04726f39a590ed539af313

  • SSDEEP

    393216:S/S0ZYVrwXh0SJamfZ9/2RofvW/sT4iLYCsOZ:ojZYpqWRmfZ4y+/m4ifsOZ

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1272766538968989716/t4bHEulMCc8ZPLSkXHMGfVgD58v1g-K-JZub8tE24Ak0gTGty1chfOxer22lc0KvQs6F

Targets

    • Target

      Bootstrapper.exe

    • Size

      13.2MB

    • MD5

      a20c7241b0483b3673b17d42ad9987ea

    • SHA1

      45a38459e0dad54433243a45e5b53fdfe48c333a

    • SHA256

      0d64d6c344e5278118e4dc6e91036dc2211bae692d36dfd085c47940b42c768e

    • SHA512

      2e7131f1f50b15005cee38d5bfcc77a20ad303e45935dc22664f4b49ad8f8ef459331c7089a44b348c4986076367d425c8e9e40aaa04726f39a590ed539af313

    • SSDEEP

      393216:S/S0ZYVrwXh0SJamfZ9/2RofvW/sT4iLYCsOZ:ojZYpqWRmfZ4y+/m4ifsOZ

    • 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

      Using powershell.exe command.

    • Drops file in Drivers directory

    • 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.

    • Unsecured Credentials: Credentials In Files

      Steal credentials from unsecured files.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • 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.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks