TROJ_ALUREON.SV

March 06, 2014
 Analysis by: Mark Joseph Manahan
 ALIASES:

Trojan horse Generic33.CBBU (AVG) ,W32/Generic_FAJN.7720162F1548!tr (Fortinet) ,Trojan.Win32.Alureon (Ikarus) ,Trojan:Win32/Alureon.GQ (Microsoft) ,Generic-FAJN!7720162F1548 (McAfee) ,a variant of Win32/Kryptik.BFLM trojan (Eset) ,Trojan.Gen (Symantec) ,Lookslike.Win32.Sirefef.e!ag (v) (Sunbelt)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

219,648 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

05 Mar 2014

Payload:

Compromises system security

Arrival Details

This Trojan 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 Trojan drops the following files:

  • %User Temp%\{random folder name 1}\{random folder name 2}\wow.ini

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It drops the following copies of itself into the affected system:

  • %User Temp%\{random folder name 1}\{random folder name 2}\wow.dll
  • {Malware Path and Filename}.exe:del

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

It creates the following folders:

  • %User Temp%\{random folder name 1}\{random folder name 2}
  • %User Temp%\{random folder name 1}

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Information Theft

This Trojan gathers the following data:

  • Operating System
  • Host CLSID

Other Details

This Trojan connects to the following website to send and receive information:

  • {BLOCKED}pepp.com:80
  • {BLOCKED}nggg.com:80
  • {BLOCKED}.{BLOCKED}.232.20:80

NOTES:
It can execute certain malicious activities on the affected system, such as:

  • Click Fraud
  • Proxy Service

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.644.05

FIRST VSAPI PATTERN DATE:

05 Mar 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

Using Trend Micro Rootkit Buster

RootkitBuster is a rootkit scanner that can check through hidden files, registry entries, processes, drivers, and hooked system services.

To use this tool, do the following:

  1. Download the tool from the following link and extract it to a temporary folder:
    http://www.trendmicro.com/download/rbuster.asp
  2. Run the RootkitBuster.exe file.
  3. On the upper left corner, select the types of hidden items that you wish to scan. We recommend selecting all types.
  4. Click the Scan button.
  5. The system is infected by this malware if the Scan result is similar to the image below:

    RootkitBuster

Step 3

Identify and terminate files detected as TROJ_ALUREON.SV

[ 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

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Temp%\{random folder name 1}
 

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_ALUREON.SV. 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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