ALIASES:

Virus:Win32/Pardona.B (Microsoft); W32/HLLP.46124 (McAfee); W32.Pardona.A@mm (Symantec); Virus.Win32.Delf.an (Kaspersky); Win32.Vadar.A@mm (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This file infector 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: 1,587,200 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 27 Nov 2012

Arrival Details

This file infector 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 file infector drops the following copies of itself into the affected system:

  • %System%\ePower.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Dropping Routine

This file infector drops the following files:

  • %System%\yBykwdFM.sys
  • \VMware Shared Folders\c$\explorer.exe
  • \VMware Shared Folders\c$\windows\cmd.com
  • \VMware Shared Folders\c$\windows\regedit.com
  • \VMware Shared Folders\c$\windows\net.com
  • \VMware Shared Folders\c$\winnt\cmd.com
  • \VMware Shared Folders\c$\winnt\regedit.com
  • \VMware Shared Folders\c$\winnt\net.com
  • \Microsoft Terminal Services\c$\explorer.exe
  • \Microsoft Terminal Services\c$\windows\cmd.com
  • \Microsoft Terminal Services\c$\windows\regedit.com
  • \Microsoft Terminal Services\c$\windows\net.com
  • \Microsoft Terminal Services\c$\winnt\cmd.com
  • \Microsoft Terminal Services\c$\winnt\regedit.com
  • \Microsoft Terminal Services\c$\winnt\net.com
  • \\BRIAN-03A68ED\c$\explorer.exe
  • \\BRIAN-03A68ED\c$\windows\cmd.com
  • \\BRIAN-03A68ED\c$\windows\regedit.com
  • \\BRIAN-03A68ED\c$\windows\net.com
  • \\BRIAN-03A68ED\c$\winnt\cmd.com
  • \\BRIAN-03A68ED\c$\winnt\regedit.com
  • \\BRIAN-03A68ED\c$\winnt\net.com
  • \\BRIAN-108E9A4A3\c$\explorer.exe
  • \\BRIAN-108E9A4A3\c$\windows\cmd.com
  • \\BRIAN-108E9A4A3\c$\windows\regedit.com
  • \\BRIAN-108E9A4A3\c$\windows\net.com
  • \\BRIAN-108E9A4A3\c$\winnt\cmd.com
  • \\BRIAN-108E9A4A3\c$\winnt\regedit.com
  • \\BRIAN-108E9A4A3\c$\winnt\net.com
  • \\BRIAN-15CCAD32E\c$\explorer.exe
  • \\BRIAN-15CCAD32E\c$\windows\cmd.com
  • \\BRIAN-15CCAD32E\c$\windows\regedit.com
  • \\BRIAN-15CCAD32E\c$\windows\net.com
  • \\BRIAN-15CCAD32E\c$\winnt\cmd.com
  • \\BRIAN-15CCAD32E\c$\winnt\regedit.com

Other Details

This file infector connects to the following possibly malicious URL:

  • http://www.{BLOCKED}bella.com/1.exe
  • http://www.{BLOCKED}bella.com/2.exe

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

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 components

[ Learn More ]
There may be some components 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.
  • %System%\yBykwdFM.sys
  • \VMware Shared Folders\c$\explorer.exe
  • \VMware Shared Folders\c$\windows\cmd.com
  • \VMware Shared Folders\c$\windows\regedit.com
  • \VMware Shared Folders\c$\windows\net.com
  • \VMware Shared Folders\c$\winnt\cmd.com
  • \VMware Shared Folders\c$\winnt\regedit.com
  • \VMware Shared Folders\c$\winnt\net.com
  • \Microsoft Terminal Services\c$\explorer.exe
  • \Microsoft Terminal Services\c$\windows\cmd.com
  • \Microsoft Terminal Services\c$\windows\regedit.com
  • \Microsoft Terminal Services\c$\windows\net.com
  • \Microsoft Terminal Services\c$\winnt\cmd.com
  • \Microsoft Terminal Services\c$\winnt\regedit.com
  • \Microsoft Terminal Services\c$\winnt\net.com
  • \\BRIAN-03A68ED\c$\explorer.exe
  • \\BRIAN-03A68ED\c$\windows\cmd.com
  • \\BRIAN-03A68ED\c$\windows\regedit.com
  • \\BRIAN-03A68ED\c$\windows\net.com
  • \\BRIAN-03A68ED\c$\winnt\cmd.com
  • \\BRIAN-03A68ED\c$\winnt\regedit.com
  • \\BRIAN-03A68ED\c$\winnt\net.com
  • \\BRIAN-108E9A4A3\c$\explorer.exe
  • \\BRIAN-108E9A4A3\c$\windows\cmd.com
  • \\BRIAN-108E9A4A3\c$\windows\regedit.com
  • \\BRIAN-108E9A4A3\c$\windows\net.com
  • \\BRIAN-108E9A4A3\c$\winnt\cmd.com
  • \\BRIAN-108E9A4A3\c$\winnt\regedit.com
  • \\BRIAN-108E9A4A3\c$\winnt\net.com
  • \\BRIAN-15CCAD32E\c$\explorer.exe
  • \\BRIAN-15CCAD32E\c$\windows\cmd.com
  • \\BRIAN-15CCAD32E\c$\windows\regedit.com
  • \\BRIAN-15CCAD32E\c$\windows\net.com
  • \\BRIAN-15CCAD32E\c$\winnt\cmd.com
  • \\BRIAN-15CCAD32E\c$\winnt\regedit.com

Step 3

Scan your computer with your Trend Micro product to clean files detected as PE_PARDONA.B. 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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