Virus.Win32.Sality_2310c481b6

Dynamic Analysis

Payload

Behaviour	Description
WormAutorun	A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Virus's file once a user opens a drive's folder in Windows Explorer.
IRCBot	A bot can communicate with command and control servers via IRC channel.
MSNWorm	A worm can spread its copies through the MSN Messanger.
DNSBlocker	A program can block designated DNS servers for making it difficult for users to locate specific domains or web sites on the Internet.
UDPFlooder	This program can make a UDP flood. A UDP flood attack is a denial-of-service attack using the User Datagram Protocol (UDP). It can be initiated by sending a large number of UDP packets to random ports on a remote host.
SYNFlooder	This program can make a SYN flood. It is a form of denial-of-service attack in which an attacker sends a succession of SYN requests to a target's system in an attempt to consume enough server resources to make the system unresponsive to legitimate traffic.
Trojan-Proxy	This program can launch a proxy server (SOCKS4) on a designated TCP port.
USBInfector	A program can register a device notification with the help of RegisterDeviceNotification. So it is notified when a USB device is plugged and then the worm copies itself to the USB device plugged into the affected computer.

Process activity

The Virus creates the following process(es):

2310c481b6999793a5c75c53efb1670d.exe:47236
2310c481b6999793a5c75c53efb1670d.exe:47280

The Virus injects its code into the following process(es):

mspaint.exe:47332
2310c481b6999793a5c75c53efb1670d.exe:1868

File activity

The process mspaint.exe:47332 makes changes in a file system.

The Virus creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\VX7DG99W\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\K7W9ABG9\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\21GXY9KL\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\History\History.IE5\desktop.ini (159 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\ENILMFUD\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Cukmko.exe (2105 bytes)

The Virus deletes the following file(s):

C:\2310c481b6999793a5c75c53efb1670d.exe (0 bytes)

The process 2310c481b6999793a5c75c53efb1670d.exe:1868 makes changes in a file system.

The Virus creates and/or writes to the following file(s):

%WinDir%\system.ini (72 bytes)
%Program Files%\Common Files\Adobe\ARM\1.0\AdobeARM.exe (31 bytes)
%System%\winmine.exe (1956 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\alybhv.exe (601 bytes)
%Program Files%\Adobe\Reader 9.0\Reader\READER_SL.EXE (1336 bytes)
%System%\notepad.exe (1116 bytes)
%Program Files%\Common Files\Java\Java Update\jusched.exe (272 bytes)

The Virus deletes the following file(s):

D:\a342e (0 bytes)
C:\a3027 (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\alybhv.exe (0 bytes)

The process 2310c481b6999793a5c75c53efb1670d.exe:47236 makes changes in a file system.

The Virus creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\ScreenSaverPro.scr (2105 bytes)
%Documents and Settings%\%current user%\Application Data\temp.bin (2105 bytes)

Registry activity

Network activity (URLs)

No activity has been detected.

Rootkit activity

The Virus installs the following user-mode hooks in WININET.dll:

HttpSendRequestW
InternetWriteFile
HttpSendRequestA

The Virus installs the following user-mode hooks in dnsapi.dll:

DnsQuery_A
DnsQuery_W

The Virus installs the following user-mode hooks in WS2_32.dll:

send
GetAddrInfoW

The Virus installs the following user-mode hooks in kernel32.dll:

MoveFileA
CopyFileW
CopyFileA
MoveFileW
CreateFileW
CreateFileA

The Virus installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtResumeThread
NtQueryInformationProcess
NtQueryDirectoryFile
ZwOpenFile
NtEnumerateValueKey
NtDeviceIoControlFile
NtCreateProcessEx
NtCreateProcess
NtCreateFile

Propagation

A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Virus's file once a user opens a drive's folder in Windows Explorer.A program can register a device notification with the help of RegisterDeviceNotification. So it is notified when a USB device is plugged and then the worm copies itself to the USB device plugged into the affected computer.A worm can spread its copies through the MSN Messanger.

Removals

Remove it with Ad-Aware

1. Click (here) to download and install Ad-Aware Free Antivirus.
2. Update the definition files.
3. Run a full scan of your computer.

Manual removal*

1. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):

   2310c481b6999793a5c75c53efb1670d.exe:47236
   2310c481b6999793a5c75c53efb1670d.exe:47280

3. Delete the original Virus file.
   
4. Delete or disinfect the following files created/modified by the Virus:

   %Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\VX7DG99W\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\K7W9ABG9\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\21GXY9KL\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\History\History.IE5\desktop.ini (159 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\Temporary Internet Files\Content.IE5\ENILMFUD\desktop.ini (67 bytes)
   %Documents and Settings%\%current user%\Application Data\Microsoft\Cukmko.exe (2105 bytes)
   %WinDir%\system.ini (72 bytes)
   %Program Files%\Common Files\Adobe\ARM\1.0\AdobeARM.exe (31 bytes)
   %System%\winmine.exe (1956 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\alybhv.exe (601 bytes)
   %Program Files%\Adobe\Reader 9.0\Reader\READER_SL.EXE (1336 bytes)
   %System%\notepad.exe (1116 bytes)
   %Program Files%\Common Files\Java\Java Update\jusched.exe (272 bytes)
   %Documents and Settings%\%current user%\Application Data\ScreenSaverPro.scr (2105 bytes)
   %Documents and Settings%\%current user%\Application Data\temp.bin (2105 bytes)

5. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
   
6. Reboot the computer.
   

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

Network Activity

Map

Strings from Dumps