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TSPY_FAREIT.YYSJO

July 11, 2015
 Analysis by: Sammy Chua
 ALIASES:

Infostealer.Limitail (Symantec); W32/Fareit.ENR!tr (Fortinet); PWS:Win32/Fareit (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

  TECHNICAL DETAILS

File Size:

549,376 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

11 Jul 2015

Arrival Details

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

Other System Modifications

This spyware adds the following registry entries:

HKEY_CURRENT_USER\Software\WinRAR
HWID = "{hex values}"

HKEY_CURRENT_USER\Software\WinRAR
Client Hash = "{hex values}"

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}b.{BLOCKED}s.al/regate/regate.php
  • http://{BLOCKED}c.{BLOCKED}s.al/regate/regate.php
  • http://{BLOCKED}d.{BLOCKED}s.al/regate/regate.php

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.712.06

FIRST VSAPI PATTERN DATE:

05 Jun 2015

VSAPI OPR PATTERN File:

11.713.00

VSAPI OPR PATTERN Date:

06 Jun 2015

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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\WinRAR
    • HWID = "{hex values}"
  • In HKEY_CURRENT_USER\Software\WinRAR
    • Client Hash = "{hex values}"

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_FAREIT.YYSJO. 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 this Knowledge Base page for more information.

Step 5

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\{random numbers}.bat


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