WORM_SOHANAD.EX

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This worm arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This worm creates the following folders:

• %User Temp%\E_4

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)

Other System Modifications

This worm deletes the following files:

• %User Profile%\Cookies\index.dat
• %Temporary Internet Files%\Content.IE5\2TPM8950\desktop.ini
• %Temporary Internet Files%\Content.IE5\4H9MXTT9\desktop.ini
• %Temporary Internet Files%\Content.IE5\desktop.ini
• %Temporary Internet Files%\Content.IE5\index.dat
• %Temporary Internet Files%\Content.IE5\SMCZPN4M\desktop.ini
• %Temporary Internet Files%\Content.IE5\X9QQH2D9\desktop.ini
• %Temporary Internet Files%\desktop.ini
• %User Profile%\History.IE5\index.dat
• %User Profile%\MSHist012010121320101220\index.dat
• %User Profile%\MSHist012010122820101229\index.dat
• %User Profile%\MSHist012010122920101230\index.dat
• %User Profile%\MSHist012011010220110103\index.dat

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista and 7.)

It deletes the following folders:

• %User Profile%\History.IE5\MSHist012010121320101220
• %User Profile%\History.IE5\MSHist012010122820101229
• %User Profile%\History.IE5\MSHist012010122920101230
• %User Profile%\History.IE5\MSHist012011010220110103
• %User Profile%\History\History.IE5

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Dropping Routine

This worm drops the following files:

• %User Temp%\E_4\krnln.fnr
• %User Temp%\E_4\shell.fne
• %User Temp%\E_4\eAPI.fne
• %User Temp%\E_4\internet.fne
• %User Temp%\E_4\spec.fne
• %User Temp%\E_4\RegEx.fnr
• %User Temp%\E_4\dp1.fne
• %User Temp%\E_4\com.run
• %System%\XP-542ADE6B.EXE
• %System%\ul.dll
• %System%\og.dll
• %System%\og.EDT
• %User Startup%\¡¡¡¡¡¡.lnk
• %System%\com.run
• %System%\dp1.fne
• %System%\eAPI.fne
• %System%\internet.fne
• %System%\krnln.fnr
• %System%\RegEx.fnr
• %System%\shell.fne
• %System%\spec.fne

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Other Details

This worm connects to the following possibly malicious URL:

• http://www.{BLOCKED}oft.com
• http://hi.{BLOCKED}u.com/siletoyou
• http://hi.{BLOCKED}u.com/ul.htm

This report is generated via an automated analysis system.