WORM_DAHAD.XVX

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

It drops copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.

It executes commands from a remote malicious user, effectively compromising the affected system.

It modifies certain registry entries to hide Hidden files.

Arrival Details

This worm arrives via removable drives.

It 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 drops the following copies of itself into the affected system and executes them:

• %System%\flash.exe

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It adds the following processes:

• cmd.exe {to modify and add registries}

Autostart Technique

This worm adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
microsoftflash = "%System%\flash.exe"

Propagation

This worm drops copies of itself in removable drives. These dropped copies use the names of the folders located on the said drives for their file names.

Backdoor Routine

This worm executes the following commands from a remote malicious user:

• Terminate itself
• Get screenshot
• Upload stolen information
• Execute programs
• Download files
• Enumerate folders
• Visit a webpage
• Send stolen information thru email
• Enumerate drives and determine their drive type (removable, remote, network, cd-rom, etc.)

It posts the following information to its command and control (C&C) server:

• .net version
• current activewindow
• Computer name
• Operating system version
• User profile directory
• User name
• Processor information

Stolen Information

This worm sends the data it gathers to the following email addresses via SMTP:

• {BLOCKED}hadad998@yahoo.com

Drop Points

Some of the email addresses that this spyware uses are the following:

• {BLOCKED}adad200@gmail.com

Other Details

This worm modifies the following registry entries to hide Hidden files:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
ShowSuperHidden = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
SuperHidden = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
HideFileExt = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "2"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced\Folder\Hidden\
SHOWALL
CheckedValue = "0"

(Note: The default value data of the said registry entry is 1.)

NOTES:

It sets the attributes of the folders in removable drives to Hidden to trick users into clicking its dropped copy instead. Upon execution, it will also open the corresponding folder so that the user that it is the actual folder.

This worm sends the data it gathers to the following email addresses via SMTP:

• {BLOCKED}ad998@yahoo.com

Some of the email addresses that this spyware uses are the following:

• {BLOCKED}ad200@gmail.com

• http://{BLOCKED}ad927.no-ip.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad927.no-ip.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad927.no-ip.biz/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad927.no-ip.biz{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad927.zapto.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad927.zapto.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad939.no-ip.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad939.no-ip.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad939.zapto.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad939.zapto.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad939.no-ip.biz/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad939.no-ip.biz{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad936.no-ip.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad936.no-ip.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad936.no-ip.biz/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad936.no-ip.biz{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad936.zapto.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad936.zapto.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad932.no-ip.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad932.no-ip.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad932.no-ip.biz/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad932.no-ip.biz{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)
• http://{BLOCKED}ad932.zapto.org/bot.php?id=(hostname)flash&compname={.net version}&os=(Operating System)&memory=(Operating System){-nx}(%User Profile%){-nx}(hostname){-nx}no command{-nx}amrhadad932.zapto.org{-nx}ActiveWindow:(window name){-nx}(random values)&processor=(processor identifier)&interval=(values)