RDN/Downloader.a!nm!F​3B65E3E7272

This page shows details and results of our analysis on the malware RDN/Downloader.a!nm!F3B65E3E7272

Overview

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.


Minimum Engine

5600.1067

File Length

51989

Description Added

2013-09-29

Description Modified

2013-09-29

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionRDN/Downloader.a!nm
Length51989 bytes
MD5f3b65e3e7272fd33c4d24a4ba38931e0
SHA1edcc8087ad499f8ae482f493cafc85b656d0a3d6


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareTrojan.Downloader.NSIS.EF (B)
ahnlabDropper/Win32.Daws
avastNSIS:Downloader-YU [Trj]
aviraTR/Downloader.Gen7
KasperskyTrojan-Dropper.Win32.Agent.ihym
BitDefenderTrojan.Downloader.NSIS.EF
FortiNetW32/Agent.IHZC!tr
MicrosoftTrojanDownloader:Win32/Leechole.B
EsetNSIS/TrojanDownloader.Leechole.C
normanDownloader
pandaTrj/NsisDownloader.A
SophosMal/Generic-S
Trend MicroTROJ_GEN.RCBCDDA

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Enumerates many system files and directories.Low
Process attempts to call itself recursivelyLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaRDN/Downloader.a!nm
McAfee SupportedRDN/Downloader.a!nm



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

EDCC8087AD499F8AE482F493CAFC85B656D0A3D6

The following files have been added to the system:

  • %TEMP%\nsyC.tmp
  • %TEMP%\TaughtTrapping\flag.ini
  • %TEMP%\nsa9.tmp
  • %TEMP%\TaughtTrapping\flag.txt

The following files were temporarily written to disk then later removed:

  • %TEMP%\nsiB.tmp
  • %TEMP%\TaughtTrapping\20121116001127.cnt
  • %TEMP%\TaughtTrapping\20121116001127.ini
  • %TEMP%\nsqA.tmp\System.dll
  • %TEMP%\nsqA.tmp\NSISdl.dll
  • %TEMP%\nsv8.tmp
  • %TEMP%\TaughtTrapping\20121116001127.dat
  • %TEMP%\nsqA.tmp

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MID\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MID\PIC = 674201211160011271621511
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\CONTROL\SESSION MANAGER\PENDINGFILERENAMEOPERATIONS = \??\%TEMP%\EDCC8087AD499F8AE482F493CAFC85B656D0A3D6

Symptoms

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

Removal

Please use the following instructions for all supported versions of Windows:


1. Disable Windows System Restore. For instructions, please refer to: http://www.mcafee.com/us/downloads/free-tools/disabling-system-restore.aspx

2. Update your McAfee Anti-Virus product to the latest version (when possible), and ensure the latest DAT and Engine and any applicable EXTRA.DATs are installed.

3. Run a full system scan. (On-Demand Scan)

4. Reboot, as soon as it is convenient, to ensure all malicious components are removed.

Variants