VBS_LOVEBOT.A

March 14, 2015
 Analysis by: David John Agni
 ALIASES:

VBS/Lovy.A (ESET-NOD32), Trojan:VBS/Agent.J (Microsoft), VBS/LoveLetter (AVG), VBS/Lovy.A (Avira)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size:

1,887 bytes

File Type:

VBS

Memory Resident:

No

Initial Samples Received Date:

13 Mar 2015

Payload:

Drops files

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:

  • %Application Data%\Net.txt
  • {Malware Path}\i_love_u.txt

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.)

Other Details

This Trojan opens the following applications:

  • NtTerminate.exe

It opens the following files:

  • {Malware Path}\i_love_u.txt - delete after Open

NOTES:

The said text file contains the following:

+--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+ +--+[i Love You]+--+

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

9.944.03

FIRST VSAPI PATTERN DATE:

27 May 2013

VSAPI OPR PATTERN File:

9.945.00

VSAPI OPR PATTERN Date:

28 May 2013

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.  
  • %Application Data%\Net.txt

Step 4

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


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