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Posted by on Dec 7, 2012 in Hardware News |

Cluster with 25 GPUs sprayed passwords LM / NTLM Windows

Cluster with 25 GPUs sprayed passwords LM / NTLM Windows

In the last event Passwords ^ 12 Conference, held a demonstration of a consisting of four rackmount servers equipped with a total of 18 video cards (11 + 7 dual GPU single GPU) in the arduous task of breaking passwords using brute force attacks.

The servers used a total of 18 video cards based on single and dual GPU configurations:

  • A server with 10 Radeon HD 7970 (10 GPUs).
  • A server with four Radeon HD 5970 (8 GPUs).
  • A server with 3 cards Radeon HD 6990 (6 GPUs).
  • A server with a Radeon HD 5870 (1 GPU).

To operate all together GPUs used a technology called Virtual (VCL), which allows multiple GPUs using the network as if they were all installed on a local computer, allowing you to use their combined computing power under the API OpenCL 1.1 on a modified version of the utility oclHashCat.

With this computing power, performed a brute force attack generates 348 billion passwords per second, achieving break in about 5.5 hours a user password (8 characters) (NTLM), and just 6 minutes break user passwords (14 characters) Windows (LM authentication used in Windows 2003/XP and below).

Cluster with 25 GPUs sprayed passwords LM / NTLM Windows image 2

Cluster with 25 GPUs sprayed passwords LM / NTLM Windows image 3

Link: A 25-GPU Monster Cracks Passwords in OpenCL (Geeks3D)

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