Virus:Worm/Agobot.54352
Date discovered:25/11/2005
Type:Worm
In the wild:Yes
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:54.352 Bytes
MD5 checksum:bec730468a4f3353231a393f838e7a50
VDF version:6.32.00.224

 General Method of propagation:
   • Local network


Aliases:
   •  Symantec: W32.Spybot.Worm
   •  Kaspersky: Backdoor.Win32.Agobot.afk
   •  TrendMicro: WORM_AGOBOT.BCO
   •  F-Secure: Backdoor.Win32.Agobot.afk
   •  Sophos: W32/Tilebot-BG
   •  Panda: W32/Sdbot.FRU.worm
   •  VirusBuster: Worm.RBot.DCO
   •  Eset: IRC/SdBot
   •  Bitdefender: Backdoor.Agobot.AFK


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Lowers security settings
   • Registry modification
   • Makes use of software vulnerability
   • Third party control

 Files It copies itself to the following location:
   • %WINDIR%\MSmedia.exe



The following file is created:

– %SYSDIR%\rdriv.sys Further investigation pointed out that this file is malware, too.

 Registry The following registry keys are added in order to load the service after reboot:

– HKLM\SYSTEM\ControlSet001\Services\MicroSoft Media Tools
   • "Type"=dword:00000110
   • "Start"=dword:00000002
   • "ErrorControl"=dword:00000000
   • "ImagePath"="%WINDIR%\MSmedia.exe"
   • "DisplayName"="MicroSoft Media Tools"
   • "ObjectName"="LocalSystem"
   • "FailureActions"=%hex values%
   • "Description"="MicroSoft Media Tools"



The following registry key is added:

– HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate
   • "DoNotAllowXPSP2"=dword:00000001



The following registry keys are changed:

– HKLM\SOFTWARE\Microsoft\Security Center
   Old value:
   • "AntiVirusDisableNotify"=%user defined settings%
   • "FirewallDisableNotify"=%user defined settings%
   • "UpdatesDisableNotify"=%user defined settings%
   • "AntiVirusOverride"=%user defined settings%
   • "FirewallOverride"=%user defined settings%
   New value:
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001

Deactivate Windows Firewall:
– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\DomainProfile
   Old value:
   • "EnableFirewall"=%user defined settings%
   New value:
   • "EnableFirewall"=dword:00000000

Deactivate Windows Firewall:
– HKLM\SOFTWARE\Policies\Microsoft\WindowsFirewall\StandardProfile
   Old value:
   • "EnableFirewall"=%user defined settings%
   New value:
   • "EnableFirewall"=dword:00000000

– HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\
   Auto Update
   Old value:
   • "AUOptions"=%user defined settings%
   New value:
   • "AUOptions"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Control\Lsa
   Old value:
   • "restrictanonymous"=%user defined settings%
   New value:
   • "restrictanonymous"=dword:00000001

– HKLM\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters
   Old value:
   • "AutoShareWks"=%user defined settings%
   • "AutoShareServer"=%user defined settings%
   New value:
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\parameters
   Old value:
   • "AutoShareWks"=%user defined settings%
   • "AutoShareServer"=%user defined settings%
   New value:
   • "AutoShareWks"=dword:00000000
   • "AutoShareServer"=dword:00000000

– HKLM\SOFTWARE\Microsoft\Ole
   Old value:
   • "EnableDCOM"=%user defined settings%
   New value:
   • "EnableDCOM"="N"

– HKLM\SYSTEM\CurrentControlSet\Control
   Old value:
   • "WaitToKillServiceTimeout"=%user defined settings%
   New value:
   • "WaitToKillServiceTimeout"="7000"

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It drops copies of itself to the following network shares:
   • Z$
   • Z$
   • Y$
   • X$
   • W$
   • V$
   • U$
   • T$
   • S$
   • R$
   • Q$
   • P$
   • O$
   • N$
   • M$
   • L$
   • K$
   • J$
   • I$
   • H$
   • G$
   • F$
   • E$
   • D$
   • C$
   • IPC$
   • d$\windows\system32
   • C$\windows\system32
   • c$\winnt\system32
   • ADMIN$\system32\
   • ADMIN$


Exploit:
It makes use of the following Exploit:
– MS01-059 (Unchecked Buffer in Universal Plug and Play)
– MS02-061 (Elevation of Privilege in SQL Server Web)
– MS03-026 (Buffer Overrun in RPC Interface)
– MS03-039 (Buffer Overrun in RPCSS Service)
– MS03-049 (Buffer Overrun in the Workstation Service)
– MS04-007 (ASN.1 Vulnerability)
– MS04-011 (LSASS Vulnerability)


IP address generation:
It creates random IP addresses while it keeps the first two octets from its own address. Afterwards it tries to establish a connection with the created addresses.


Infection process:
Creates an FTP script on the compromised machine in order to download the malware to the remote location.


Remote execution:
–It attempts to schedule a remote execution of the malware, on the newly infected machine. Therefore it uses the NetScheduleJobAdd function.

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: blast.p**********
Port: 10421
Channel: #H#
Nickname: [USA|XP|P00|%six-digit random character string%]
Password: #H#



– This malware has the ability to collect and send the following information:
    • Cached passwords
    • Collected Email addresses
    • CPU speed
    • Details about drivers
    • Free disk space
    • Free memory
    • Information about the network
    • Platform ID
    • Information about running processes
    • Size of memory
    • Username


– Furthermore it has the ability to perform actions such as:
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Launch DDoS UDP flood
    • Disable network shares
    • Download file
    • Enable network shares
    • Execute file
    • Kill process
    • Open remote shell
    • Perform network scan
    • Perform port redirection
    • Restart system
    • Start spreading routine
    • Terminate malware
    • Terminate process
    • Updates itself
    • Upload file
    • Visit a website

 Process termination  List of services that are disabled:
   • Security Center
   • Telnet
   • Remote Registry
   • Messenger

 Backdoor Contact server:
All of the following:
   • http://hpcgi1.nifty.com/mute/c/**********
   • http://www.age.ne.jp/x/maxwell/cgi-bin/**********
   • http://www2.dokidoki.ne.jp/tomocrus/cgi-bin/check/**********
   • http://cgi14.plala.or.jp/little_w/**********
   • http://yia.s22.xrea.com/**********
   • http://www.kinchan.net/cgi-bin/**********


 Miscellaneous Mutex:
It creates the following Mutex:
   • 0xFFFFFFFF

 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 a runtime packer.

Description inserted by Irina Boldea on Tuesday, April 4, 2006
Description updated by Irina Boldea on Wednesday, April 19, 2006

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