Virus:Worm/Agobot.agw.1
Date discovered:08/03/2006
Type:Worm
In the wild:No
Reported Infections:Low
Distribution Potential:Medium
Damage Potential:Medium
Static file:Yes
File size:85.291 Bytes
MD5 checksum:c57ee618f1c7445a66064d87f506662e

 General Methods of propagation:
   • Local network


Aliases:
   •  Kaspersky: Backdoor.Win32.Agobot.agw
   •  TrendMicro: WORM_AGOBOT.BBR


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


Side effects:
   • Registry modification
   • Makes use of software vulnerability
   • Steals information
   • Third party control

 Files It copies itself to the following location:
   • %SYSDIR%\mssvcc.exe



It deletes the initially executed copy of itself.

 Registry The following registry keys are added in order to run the processes after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "msconfig38"="mssvcc.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices]
   • "msconfig38"="mssvcc.exe"



The following registry keys are changed:

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

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

 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:
   • IPC$
   • C$
   • ADMIN$


It uses the following login information in order to gain access to the remote machine:

– The following list of usernames:
   • adm; admin; administrador; administrat; administrateur; administrator;
      admins; computer; database; db2; dba; default; guest; oracle; owner;
      root; staff; student; teacher; wwwadmin

– The following list of passwords:
   • 007; 123; 1234; 12345; 123456; 1234567; 12345678; 123456789;
      1234567890; 2000; 2001; 2002; 2003; 2004; access; accounting;
      accounts; asd; backup; bill; bitch; blank; bob; brian; changeme;
      chris; cisco; compaq; control; data; databasepass; databasepassword;
      db1; db1234; db2; dbpass; dbpassword; default; dell; demo; domain;
      domainpass; domainpassword; eric; exchange; fred; fuck; george; god;
      guest; hell; hello; home; homeuser; ian; ibm; internet; intranet; jen;
      joe; john; kate; katie; lan; lee; linux; login; loginpass; luke; mail;
      main; mary; mike; neil; nokia; none; null; oem; oeminstall; oemuser;
      office; orainstall; outlook; pass; pass1234; passwd; password;
      password1; peter; pwd; qaz; qwe; qwerty; root; sam; server; sex;
      siemens; slut; sql; sqlpassoainstall; sue; susan; system; technical;
      test; unix; user; web; win2000; win2k; win98; windows; winnt; winpass;
      winxp; www; zxc



Exploit:
It makes use of the following Exploits:
– 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 a TFTP or 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 Servers:

Server: **********.slateit1703.info
Port: 8080
Channel: #final,#finaldownload
Nickname: USA|%six-digit random character string%
Password: he.he

Server: **********.3071tietals.info
Port: 8080
Channel: #final,#finaldownload
Nickname: USA|%six-digit random character string%
Password: he.he



– This malware has the ability to collect and send information such as:
    • CPU speed
    • Current user
    • Details about drivers
    • Free disk space
    • Free memory
    • Malware uptime
    • Information about the network
    • Size of memory
    • Information about the Windows operating system


– Furthermore it has the ability to perform actions such as:
    • connect to IRC server
    • Launch DDoS ICMP flood
    • Launch DDoS SYN flood
    • Launch DDoS UDP flood
    • Disable DCOM
    • Disable network shares
    • disconnect from IRC server
    • Download file
    • Enable DCOM
    • Enable network shares
    • Execute file
    • Join IRC channel
    • Kill process
    • Leave IRC channel
    • Open remote shell
    • Perform network scan
    • Restart system
    • Start spreading routine
    • Terminate malware
    • Updates itself
    • Upload file

 Backdoor The following port is opened:

– mssvcc.exe on UDP port 69 in order to provide a TFTP server.

 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 Iulia Diaconescu on Wednesday, March 8, 2006
Description updated by Iulia Diaconescu on Wednesday, March 22, 2006

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