TROJ_DLOADR.DCG

October 09, 2012
 Modified by: Abraham Latimer Camba
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • 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 connects to certain URLs. It may do this to remotely inform a malicious user of its installation. It may also do this to download possibly malicious files onto the computer, which puts the computer at a greater risk of infection by other threats.

  TECHNICAL DETAILS

File Size:

75,264 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

08 Mar 2012

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.

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdate
value = "20120304"

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdate
GUID = "{GUID}"

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\NVIDIA Corporation

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global

HKEY_CURRENT_USER\Software\NVIDIA Corporation\
Global\nvUpdate

Download Routine

This Trojan connects to the following malicious URLs:

  • http://{BLOCKED}.{BLOCKED}.161.29:8180/feed/go.php?id=e209acd3-2f26-4d5c-a703-258627640d08&sid=3385485a14c01785aba545830ab7bf57&n=n-8&tid=8101276899597433174&s=3118
  • http://{BLOCKED}.{BLOCKED}.173.65:8001/speed
  • http://{BLOCKED}.{BLOCKED}.138.81/ok
  • http://{BLOCKED}.{BLOCKED}.200.224:8001/speed
  • http://{BLOCKED}.{BLOCKED}.73.108/
  • http://{BLOCKED}.{BLOCKED}.73.118:8001/speed
  • http://{BLOCKED}.{BLOCKED}.56.190/
  • http://{BLOCKED}.{BLOCKED}.53.205/sample_city.php
  • http://{BLOCKED}.{BLOCKED}.102.86/
  • http://{BLOCKED}.{BLOCKED}.126.120:8001/speed
  • http://{BLOCKED}.{BLOCKED}.172.246/~serpee/craigslist/post/proxy_info.php
  • http://{BLOCKED}.{BLOCKED}.77.139/returnip.req
  • http://{BLOCKED}.{BLOCKED}.214.18/1.html
  • http://{BLOCKED}.{BLOCKED}.214.18/2.html
  • http://api.{BLOCKED}e.com/1.0/shorten?input=http%3A%2F%2Faustenbookz.info%2Fcommon-design-patterns-for-symbian-os-the-foundations-of-smartphone-software-symbian-press-adrian-j-issott-download-read-buy-online%2F
  • http://chek.{BLOCKED}ab.com/proxy.php
  • http://clients.{BLOCKED}va.com/data/?p=7f7fa3c97f9d46efa6525302bb50109a&cm=7&subid=24252_7869
  • http://clients.{BLOCKED}va.com/data/?p=7f7fa3c97f9d46efa6525302bb50109a&cm=7&subid=29638_10025
  • http://{BLOCKED}m.bs/api.php?function=simpleshorten&url=http%3A%2F%2Fdickensbookz.info%2Fcompanion-encyclopedia-of-theology-routledge-companion-encyclopedias-peter-byrne-leslie-houlden-rev-prof-leslie-houlden-ebook-2%2F

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.832.03

FIRST VSAPI PATTERN DATE:

12 Mar 2012

VSAPI OPR PATTERN File:

8.833.00

VSAPI OPR PATTERN Date:

13 Mar 2012

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Delete this registry key

[ 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. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

 
  • In HKEY_CURRENT_USER\Software
    • NVIDIA Corporation

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLOADR.DCG. 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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