Analysis by: Michael Jay Villanueva
ALIASES:

Trojan:Win32/Occamy.B (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware

This Trojan Spy may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 231,424 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 12 Feb 2018
Payload: Collects system information

Arrival Details

This Trojan Spy may be dropped by the following malware:

Information Theft

This Trojan Spy gathers the following data:

  • System Credentials, such as:
    • Username
    • Password
    • Domain/Hostname

Other Details

This Trojan Spy does the following:

  • After gathering the system credentials on the affected machine, TROJ_OLYMPICDESTROYER.A will use the stolen credentials for remote connection and propagation using PsExec.
  • It extracts the stolen information/credentials from lsass.exe.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.982.08
FIRST VSAPI PATTERN DATE: 22 Feb 2018
VSAPI OPR PATTERN File: 13.983.00
VSAPI OPR PATTERN Date: 23 Feb 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

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 3

Identify and terminate files detected as TSPY_MALSASS.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_MALSASS.A. 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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