Downloader.gen.a!4FD9​C01CD89D

This page shows details and results of our analysis on the malware Downloader.gen.a!4FD9C01CD89D

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 DAT

7493 (2014-07-08)

Updated DAT

7493 (2014-07-08)

Minimum Engine

5600.1067

File Length

606080

Description Added

2014-07-09

Description Modified

2014-07-09

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionDownloader.gen.a
Length606080 bytes
MD54fd9c01cd89d69e75f1b08b8c424432c
SHA1da7a654e839ac7941adaf416b69536a4a8e8a66a


Other Common Detection Aliases

Company NamesDetection Names
AVG (GriSoft)Wedownload.E0C.
Kasperskynot-a-virus:Downloader.Win32.Agent.beao
SymantecTrojan.ADH.2
EsetMSIL/Soft32Downloader.A application
pandaTrj/Chgt.A
vba32Downloader.Agent

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
Adds or modifies Internet Explorer cookiesLow


McAfee ScansScan Detections
McAfee BetaDownloader.gen.a
McAfee SupportedDownloader.gen.a



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:

DA7A654E839AC7941ADAF416B69536A4A8E8A66A

The following files have been added to the system:

  • %USERPROFILE%\Local Settings\Application Data\GDIPFONTCACHEV1.DAT
  • %TEMP%\DM_pOhRaSFFxT\DownloadManager.exe
  • %TEMP%\nsu9.tmp\pwgen.dll
  • %TEMP%\nsu9.tmp\UserInfo.dll
  • %TEMP%\nsu9.tmp\System.dll
  • %TEMP%\nsu9.tmp\inetc.dll

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

  • %TEMP%\nsq16.tmp
  • %TEMP%\Cab51.tmp
  • %TEMP%\Tar52.tmp
  • %TEMP%\nsu9.tmp
  • %TEMP%\nsp8.tmp

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\0048F8D37B153F6EA2798C323EF4F318A5624A9E\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\00EA522C8A9C06AA3ECCE0B4FA6CDC21D92E8099\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\0483ED3399AC3608058722EDBC5E4600E3BEF9D7\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\049811056AFE9FD0F5BE01685AACE6A5D1C4454C\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\0563B8630D62D75ABBC8AB1E4BDFB5A899B24D43\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\0B77BEBBCB7AA24705DECC0FBD6A02FC7ABD9B52\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\1331F48A5DA8E01DAACA1BB0C17044ACFEF755BB\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\1F55E8839BAC30728BE7108EDE7B0BB0D3298224\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\209900B63D955728140CD13622D8C687A4EB0085\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\216B2A29E62A00CE820146D8244141B92511B279\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\23E594945195F2414803B4D564D2A3A3F5D88B8C\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\24A40A1F573643A67F0A4B0749F6A22BF28ABB6B\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\24BA6D6C8A5B5837A48DB5FAE919EA675C94D217\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\273EE12457FDC4F90C55E82B56167F62F532E547\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\284F55C41A1A7A3F8328D4C262FB376ED6096F24\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\2F173F7DE99667AFA57AF80AA2D1B12FAC830338\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\317A2AD07F2B335EF5A1C34E4B57E8B7D8F1FCA6\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\36863563FD5128C7BEA6F005CFE9B43668086CCE\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\394FF6850B06BE52E51856CC[private subnet]CC\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\3F85F2BB4A62B0B58BE1614ABB0D4631B4BEF8BA\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4072BA31FEC351438480F62E6CB95508461EAB2F\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\40E78C1D523D1CD9954FAC1A1AB3BD3CBAA15BFC\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\43DDB1FFF3B49B73831407F6BC8B975023D07C50\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\43F9B110D5BAFD48225231B0D0082B372FEF9A54\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4463C531D7CCC[private subnet]BB656D3BF8257846F\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\47AFB915CDA26D82467B97FA42914468726138DD\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4B421F7515F6AE8A6ECEF97F6982A400A4D9224E\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4BA7B9DDD68788E12FF852E1A024204BF286A8F6\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4C95A9902ABE0777CED18D6ACCC3372D2748381E\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4EF2E6670AC9B5091FE06BE0E5483EAAD6BA32D9\BLOB = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\SYSTEMCERTIFICATES\AUTHROOT\CERTIFICATES\4EFCED9C6BDD0C985CA3C7D253063C5BE6FC620C\BLOB = [binary data]

The applications attempted the following network connection(s):

  • hxxp://www.google-analytics.com/*****
  • hxxp://cacerts.digicert.com/*****
  • 72.21.91.**:80
  • 8.27.248.***:80
  • 54.243.146.***:443

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