WORM_BRONTOK.IL

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.

It modifies certain registry entries to hide file extensions.

It does not have any backdoor routine.

It does not have any downloading capability.

It does not have any information-stealing capability.

It modifies certain registry entries to hide Hidden files.

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

• %Windows%\windows.exe
• {drive letter}\{Folder Name}\{Folder Name}.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

It then creates the following non-malicious file(s):

• %Windows%\xp.dll

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

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
isass = "%Windows%\WINDOWS.exe"

Other System Modifications

This worm modifies the following registry entries to hide file extensions:

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

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

Backdoor Routine

This worm does not have any backdoor routine.

Download Routine

This worm does not have any downloading capability.

Information Theft

This worm does not have any information-stealing capability.

Other Details

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

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

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

NOTES:

It displays a messagebox with the following details:

Title: OI DAB!!!
Icon: Information
Body: NAMA :{variable 1}pesan :{variable 2}

Where {variable 1} is any of the following:

• ACHMAD MULTAZAM
• ADI JAYUSMAN
• BAGUS SUPARTONO
• DJANAN ZAMZAMI
• EDI DWI DARYAPTO
• ERWAN HERMAWAN
• RICKY ARDIANSYAH
• SUPRIYANTO

Where {variable 2} is any of the following:

• ayo dab cari chatingan lagi
• keep peace
• nggak ada pesen untuk diriku sendiri
• piye kabare parangtritis
• waduh tepo yo keno to

It does not have rootkit capabilities.

It does not exploit any vulnerability.