Spectre is a vulnerability that affects modern microprocessors that perform branch prediction. On most processors, the speculative execution resulting from a branch mis-prediction may leave observable side effects that may reveal private data to attackers. For example, if the pattern of memory accesses performed by such speculative execution depends on private data, the resulting state of the data cache constitutes a side channel through which an attacker may be able to extract information about the private data using a timing attack.
Spectre exploits for Windows was put on VirusTotal. The exploit allows dumping Kerberos tickets that can be used with PsExec for local privilege escalation and lateral movement on Windows systems.
Update: Download Spectre Exploit for Linux
Spectre exploits for Windows Signatures
Spectre exploits for Windows Download