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TROJ_AGENT.XXTVB

September 26, 2014
 Analysis by: Jaime Benigno Reyes
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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 executes then deletes itself afterward.

  TECHNICAL DETAILS

File Size:

125,952 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

21 Sep 2014

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:

  • {malware path}\ka4281x3.log - deleted afterwards
  • {malware path}\{malware's base filename less the last 4 characters}.doc - if malware's base filename is made up of more than 4 characters
  • {malware path}\.doc - if malware's base filename is made up of 4 characters

It executes then deletes itself afterward.

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.162.05

FIRST VSAPI PATTERN DATE:

21 Sep 2014

VSAPI OPR PATTERN File:

11.163.00

VSAPI OPR PATTERN Date:

22 Sep 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.
  • {malware path}\ka4281x3.log
  • {malware path}\{malware's base filename less the last 4 characters}.doc
  • {malware path}\.doc

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.XXTVB. 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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