Tll.exe «Limited 2025»

tll.exe — Executive Summary and Technical Report

Overview

Name: tll.exe
Type: Executable (Windows PE)
Typical locations: Program Files directories, AppData\Roaming, C:\Windows\System32 (malicious actors may use unusual locations)
Primary concerns: Often associated with unknown/third-party software; can be benign if part of legitimate application, but frequently observed in malware/PUA contexts when present unexpectedly.

Use Process Explorer / Sysinternals to view parent process, command line, handles, and loaded modules.

Behavioral characteristics observed in incidents

Persistence mechanisms: Registry Run keys, scheduled tasks, service installations.
Process hollowing or code injection into explorer.exe, svchost.exe, or other system processes.
File system activity: dropping additional payloads, creating autorun files.
Network: beaconing to C2, downloading additional modules, uploading data.
Evasion: packing/obfuscation, anti-analysis checks (VM, debugger detection), encrypted strings.

Launch Failure: Users frequently report that the game fails to start through the Steam or Epic launcher. Manually navigating to the installation folder and running tll.exe as an administrator often resolves this.

Review Registry Run keys, Scheduled Tasks, Services, Startup folders.

Game Executable: It serves as the main application file used to launch UNCHARTED: The Lost Legacy on Windows. tll.exe

3.2 Common Behaviors

| Behavior | Legitimate Use | Malicious Use | |----------|----------------|---------------| | Process injection | Rare, only for legitimate plugin loading | Frequently used to hide in trusted processes (e.g., explorer.exe, svchost.exe) | | Network communication | Connects to vendor’s update servers (HTTPS, TLS) | Contacts command‑and‑control (C2) servers via HTTP, HTTPS, or custom protocols; often uses domain‑generation algorithms (DGAs) | | Persistence | Registry key HKLM\Software\Microsoft\Windows\CurrentVersion\Run pointing to a signed updater | Same registry locations, sometimes scheduled tasks, WMI event subscriptions, or service creation | | File system changes | Writes configuration files in %APPDATA% or %PROGRAMDATA% | Drops additional payloads (e.g., payload.dll, injector.exe) in obscure directories; may modify security settings (UAC bypass) | | Privilege escalation | Not applicable | May exploit known Windows vulnerabilities (e.g., CVE‑2021‑26855) to gain SYSTEM rights | Name: tll