General

  • Target

    https://mega.nz/folder/B4tghDaB#XGa0qgFhhAeW_1hHC79Xlg

  • Sample

    221027-n85ezacae2

Malware Config

Targets

    • Target

      https://mega.nz/folder/B4tghDaB#XGa0qgFhhAeW_1hHC79Xlg

    • Modifies system executable filetype association

    • StormKitty

      StormKitty is an open source info stealer written in C#.

    • StormKitty payload

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Registers COM server for autorun

    • Checks BIOS information in registry

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v6

Tasks