Full description

Virus:	BDS/Cycbot.B.1279
Date discovered:	20/03/2011
Type:	Backdoor Server
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Medium
Static file:	Yes
VDF version:	7.10.09.227
IVDF version:	7.11.05.02 - Sunday, March 20, 2011

General Method of propagation:
   • No own spreading routine

Aliases:
   • 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:
• %APPDATA%\Microsoft\conhost.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:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "conhost"="%APPDATA%\Microsoft\conhost.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=127.0.0.1:%number%"
   • "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 port is opened:

– svchost.exe on UDP port in order to provide backdoor capabilities.

Stealing – It uses a network sniffer that checks for the following strings:
   • .2mdn.; .abmr.; .adtechus.; .aol.; .atdmt.; .atwola.;
      .autodatadirect.; .bing.net; .dartsearch.; .doubleclick.; .ggpht.;
      .google; .ivwbox.; .mapquestapi.; .microsoft.; .opera.; .tacoda.;
      .thawte.; .tlowdb.; .truveo.; .virtualearth.; .wsod.; .yimg.com;
      .ypcdn.; /complete/search; /gen_204; /images; /imglanding; ?query=;
      amazon.; aol/search; aolcdn.; aolsvc.; bing.com; bing.com/search;
      blogger; brightcove.com; doubleclick.; ebay.; err069; facebook.;
      flickr; google-analytics.; google.; googlesyndication.;
      googleusercontent.; gstatic.; http%3A##; imdb.; mapq.st; msn;
      scorecardresearch.com; search.aol.; search.yahoo.com/search;
      searcht2.aol.; start=; start=0; suche.aol.; twitter.; wikimedia.;
      wikipedia.; yahoo.; yahoo.com; youtube.; ytimg.

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

Miscellaneous String:
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

설명 삽입자 Andrei Ilie 2011년 10월 5일 수요일
설명 업데이트 Andrei Ilie 2011년 10월 6일 목요일

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