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OSX64_CVE20175753.POC

January 24, 2018
 Analysis by: Johnlery Triunfante
 ALIASES:

Exploit.Spectre.D (BitDefender); OSX/Spectre-A (Sophos); OSX/Spectre.A!tr (Fortinet)

 PLATFORM:

Mac OS X

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Exploit

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

This proof of concept attempts to exploit a vulnerability known as Spectre. If successful, it allows exploitation of said vulnerability in Mac OS systems. Exploitation of said vulnerability is difficult to mitigate as of this writing because it requires changes in the hardware.

This Exploit arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Type:

Mach-O

Memory Resident:

Yes

Initial Samples Received Date:

11 Jan 2018

Payload:

Displays message/message boxes, Exploits vulnerability

Arrival Details

This Exploit arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other Details

This Exploit does the following:

  • It loads the following string into the memory then uses the exploit to read and display the string via a console:
    • "The Magic Words are Squeamish Ossifrage"

It takes advantage of the following vulnerabilities:

NOTES:

This is the Trend Micro detection for the proof of concept (PoC) sample of CVE-2017-5753.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.914.08

FIRST VSAPI PATTERN DATE:

19 Jan 2018

VSAPI OPR PATTERN File:

13.915.00

VSAPI OPR PATTERN Date:

20 Jan 2018

Step 1

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 2

Scan your computer with your Trend Micro product to delete files detected as OSX64_CVE20175753.POC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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