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Date discovered:22/06/2011
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Medium
Static file:Yes
File size:187.904 Bytes
MD5 checksum:4D0B59243D9AC9D047A20858CAF74F52
VDF version:
IVDF version:

 General Method of propagation:
   • No own spreading routine

   •  TrendMicro: BKDR_CYCBOT.SME3
   •  Sophos: Troj/FakeAV-EFL
   •  Microsoft: Backdoor:Win32/Cycbot.B

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows 7

Side effects:
   • Third party control
   • Drops files
   • Registry modification
   • Steals information

 Files It copies itself to the following location:
   • %TEMPDIR%\csrss.exe

The following file is created:

– %APPDATA%\%hex values%.%hex values% Contains parameters used by the malware.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   • "Load"="%TEMPDIR%\csrss.exe"

The following registry key is changed:

Lower security settings from Internet Explorer:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:00000001
   • "ProxyEnable"=dword:00000001
   • "ProxyServer"="http="
   • "ProxyOverride"=-
   • "AutoConfigURL"=-

 Process termination Processes with one of the following strings are terminated:
   • AVG
   • Avast
   • Avira
   • Dr.Web
   • Kaspersky
   • McAfee
   • ESET NOD32
   • Norton
   • BitDefender

 Backdoor The following ports are opened:

%executed file% on a random TCP port in order to provide a proxy server.
%executed file% on a random TCP port in order to provide backdoor capabilities.

Contact server:
All of the following:
   • http://********************
   • http://********************

As a result it may send information and remote control could be provided.

Sends information about:
    • Created logfiles
    • visited URLs

Remote control capabilities:
    • Visit a website

 Stealing – It uses a network sniffer that checks for the following strings:
   • .2mdn.; .abmr.; .adtechus.; .aol.; .atdmt.; .atwola.;
      .autodatadirect.;; .dartsearch.; .doubleclick.; .ggpht.;
      .google; .ivwbox.; .mapquestapi.; .microsoft.; .opera.; .tacoda.;
      .thawte.; .tlowdb.; .truveo.; .virtualearth.; .wsod.;;
      .ypcdn.; /complete/search; /gen_204; /images; /imglanding; ?query=;
      amazon.; aol/search; aolcdn.; aolsvc.;;;
      blogger;; doubleclick.; ebay.; err069; facebook.;
      flickr; google-analytics.; google.; googlesyndication.;
      googleusercontent.; gstatic.; http%3A##; imdb.;; msn;;;;; start=; start=0;; twitter.; wikimedia.;
      wikipedia.; yahoo.;; youtube.; ytimg.

 Injection     All of the following processes:
   • wmiprvse.exe
   • svchost.exe

 Miscellaneous Accesses internet resources:

Furthermore it contains the following string:
   • IsDebuggerPresent

 File details Programming language:
The malware program was written in MS Visual C++.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Descrição enviada por Andrei Ilie em segunda-feira, 24 de outubro de 2011
Descrição atualizada por Andrei Ivanes em sexta-feira, 28 de outubro de 2011

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