In late February 2024, a Russian state-sponsored group called APT29 launched a campaign targeting German political parties, employing a new backdoor called WINELOADER. This marks a shift in APT29's priorities, suggesting an evolution influenced by the current geopolitical climate. The attack chain begins with a spear-phishing email containing a malicious ZIP file that initiates a multi-stage infection process, ultimately delivering the WINELOADER backdoor. This detailed analysis explores the tactics, techniques, and procedures used in the initial access stage and provides an in-depth examination of the WINELOADER malware itself, including its capabilities, command and control communication, and evasion techniques.