TROJ_DLOADR.AUR

May 04, 2013
 Analysis by: Erika Bianca Mendoza
 PLATFORM:

Windows 98, ME, NT, 2000, XP, Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan uses icons similar to those of legitimate applications to entice a user to click them.

It uses file names similar to those of legitimate applications to trick a user into thinking they are legitimate.

  TECHNICAL DETAILS

File Size:

151 bytes

File Type:

EXE

Memory Resident:

Yes

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\
CurrentVersion\Run
{Legitimate looking name} = {Malware path and file name}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\
CurrentVersion\RunServices
{Legitimate looking name} = {Malware path and file name}

Propagation

This Trojan uses icons similar to those of legitimate applications to entice a user to click them.

Other Details

This Trojan uses file names similar to those of legitimate applications to trick a user into thinking they are legitimate.

  SOLUTION

Minimum Scan Engine:

8.900

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

Scan your computer with your Trend Micro product and note files detected as TROJ_DLOADR.AUR

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\ CurrentVersion\Run
    • {File name used by malware detected earlier}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\ CurrentVersion\RunServices
    • {File name used by malware detected earlier}

Step 5

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