Analysis by: Rika Joi Gregorio
ALIASES:

Infostealer.Limitail(NOrton), W32/Chisburg.BAQ!tr.pws(Fortinet), Trojan.Win32.Inject(Ikarus), a variant of Win32/Injector.Autoit.BAQ trojan(Eset)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet

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

  TECHNICAL DETAILS

File Size: 1,107,823 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 30 Oct 2014
Payload: Connects to URLs/IPs

Arrival Details

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

Installation

This spyware drops the following files:

  • %User Temp%\{10 random alphanumeric characters}.ini - deleted afterwards

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Information Theft

This spyware attempts to steal stored email credentials from the following:

  • Yahoo
  • Hotmail
  • Pidgin
  • Eudora
  • Outlook Express
  • Incredimail
  • MS Outlook 2002/2003/2007
  • Group Mail
  • Netscape Mail
  • Windows Mail
  • Windows Live Mail

It attempts to get stored information such as user names, passwords, and hostnames from the following browsers:

  • Safari
  • Mozilla Firefox
  • Opera
  • Chrome
  • Thunderbird
  • Netscape

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

  • http://www.{BLOCKED}office.fulba.com/engr/index.php?action=add&username={user name}&password={password}=&app={application}&pcname={computer name}&sitename={URL of credentials}

NOTES:

This spyware steals user names and passwords from the following:

  • FileZilla
  • jDownloader
  • Internet Download Manager
  • Registry, website, or application defined in %User Temp%\{10 random alphanumeric characters}.ini
  • Trillian
  • VPN Credentials

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 11.244.05
FIRST VSAPI PATTERN DATE: 30 Oct 2014
VSAPI OPR PATTERN File: 11.245.00
VSAPI OPR PATTERN Date: 31 Oct 2014

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

Search and delete this file

[ 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%\{10 random alphanumeric characters}.ini

Step 4

Scan your computer with your Trend Micro product to delete files detected as TSPY_CHISBURG.YU. 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.


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