Overview

overview

10

Static

static

1

URLScan

urlscan

https://mega.nz/fold...

windows10-1703-x64

10

Sharing

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General

  • Target

    https://mega.nz/folder/iG4GlTRZ#Xa2tQ1iSr93n28K_EJWBMQ

  • Sample

    240624-225ztaxanc

Score
10/10
umbralevasionexecutionpersistencestealerthemida

Malware Config

Targets

    • Target

      https://mega.nz/folder/iG4GlTRZ#Xa2tQ1iSr93n28K_EJWBMQ

    Score
    10/10
    umbralevasionexecutionpersistencestealerthemida

    • Detect Umbral payload

    • Umbral

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

      stealerumbral

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

      evasion

    • 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

    • Sets service image path in registry

      persistence

    • Checks BIOS information in registry

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • 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

    behavioral1

MITRE ATT&CK Enterprise v15

Tasks