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WORM_VERCUS.A

December 05, 2014
 Analysis by: Francis Xavier Antazo
 ALIASES:

Trojan:Win32/Vercuser.A (MICROSOFT), Worm.Win32.VB.eem (KASPERSKY),

 PLATFORM:

Windows

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

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Via physical/removable drives, Downloaded from the Internet


This worm arrives via removable drives. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It uses the default Windows folder icon to trick users into opening the file. Double-clicking the file executes this malware.

  TECHNICAL DETAILS

File Size:

36,864 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

02 Dec 2014

Arrival Details

This worm arrives via removable drives.

It 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 worm adds the following processes:

  • (Malware Path)\USB\Data\SecureDrive.exe

It creates the following folders:

  • (Malware Path)\(Malware File Name)

It uses the default Windows folder icon to trick users into opening the file. Double-clicking the file executes this malware.

Other Details

This worm requires the following additional components to properly run:

  • {Malware Path}\USB\Data\SecureDrive.exe

NOTES:

This worm opens the following created folder to trick users:

  • {Malware Path}\{Malware File Name}

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

11.314.04

FIRST VSAPI PATTERN DATE:

02 Dec 2014

VSAPI OPR PATTERN File:

11.315.00

VSAPI OPR PATTERN Date:

03 Dec 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

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.
  • (Malware Path)\USB
  • (Malware Path)\(Malware File Name)

Step 3

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