Content
Bomber
- Type
- Virus
- SubType
- File Infector
- Discovery Date
- 05/01/1992
- Length
- 2,204 Bytes
- Minimum DAT
- 4002 (12/02/1998)
- Updated DAT
- 4233 (11/13/2002)
- Minimum Engine
- 5.1.00
- Description Added
- 05/15/1992
- Description Modified
- 05/15/1992 12:00 AM (PT)
Tab Navigation
Characteristics
Bomber is a stealth, memory resident, file infecting virus. It infects .COM files.
Upon infection, the Bomber virus becomes memory resident at the top of system memory but below the 640K DOS boundary. Interrupt 12's return is not moved. Interrupts 1C, 20, 21, and 22 are hooked by the Bomber virus in memory.
Once the Bomber virus is memory resident, it infects .COM files as they are executed or opened. It also infects all of the .COM files in a directory when a DOS DIR command is issued.
Additional Comments:
The Bomber, or Bomb, virus was received from Malaysia in May, 1992.
This virus is a memory resident infector of .COM files which employs
some stealth technology to avoid detection. It activates on
August 31st, Malaysia's Independence Day.
When the first program infected with the Bomber virus is executed,
the Bomber virus will install itself memory resident at the top of
system memory but below the 640K DOS boundary. Interrupt 12's return
will not be moved. Total system and available free memory, as
indicated by the DOS CHKDSK program, will have decreased by 3,072
bytes. Interrupts 1C, 20, 21, and 22 will be hooked by the Bomber
virus in memory.
Once the Bomber virus is memory resident, it will infect .COM
programs when they are executed or opened. It will also infect all
of the .COM programs in a directory when a DOS DIR command is
issued. Programs infected with the Bomber virus will have a file
length increase of 2,204 bytes, though the increase in size will be
hidden if Bomber is memory resident. The virus will be located at
the beginning of the infected files. Infected programs will not have
their file date and time altered in the DOS disk directory listing.
Bomber is an encrypted virus, and no text strings are visible within
the viral code in infected programs.
The Bomber virus activates on August 31st, Malaysia's Independence
Day. On August 31st, the virus will occassionally emit three beeps
and the following message will be displayed:
"! I AM THE STEALTH BOMBER !
U컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
3 I BELONG TO THE NEW 3
3 GENERATION OF COMPUTER 3
3 VIRUSES. LIKE THE STEALTH 3
3 BOMBER, I GO UNDETECTED 3
3 BY ENEMY RADAR 3
A컴컴컴컴컴컴컴컴컴컴컴컴컴컴U
!!! DO NOT PANIC !!!
I AM SHOWING OFF HOW
EASY I CAN EVADE YOUR ANTI
VIRUS SYSTEM - I DO NO HARM"
Bomber doesn't do anything malicious besides displaying its
message. However, systems infected with the Bomber virus will
experience boot failures after COMMAND.COM becomes infected, as
well as file allocation errors being detected by the DOS CHKDSK
program when Bomber is memory resident. Lastly, the DOS DIR
command will be very sluggish.
Known variant(s) of Bomber are:
Symptoms
The Bomber virus activates on August 31st, Malaysia's Independence Day. On August 31st, the virus occasionally emits three beeps and the following message is displayed:
"! I AM THE STEALTH BOMBER !
U컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 3 I BELONG TO THE NEW 3 3 GENERATION OF COMPUTER 3 3 VIRUSES. LIKE THE STEALTH 3 3 BOMBER, I GO UNDETECTED 3 3 BY ENEMY RADAR 3 A컴컴컴컴컴컴컴컴컴컴컴컴컴컴U
!!! DO NOT PANIC !!!
I AM SHOWING OFF HOW EASY I CAN EVADE YOUR ANTI VIRUS SYSTEM - I DO NO HARM"
Systems infected with the Bomber virus experience boot failures after COMMAND.COM becomes infected, as well as file allocation errors being detected by the DOS CHKDSK program when Bomber is memory resident. The DOS DIR command may be very sluggish.
Total system and available free memory decreases by 3,072 bytes. Files infected with the Bomber virus have a file length increase of 2,204 bytes. The increase in size is hidden if Bomber is memory resident (Stealth techniques). The virus is located at the beginning of the infected files. Infected files do not have their file date and time altered in the DOS disk directory listing. Bomber is an encrypted virus, and no text strings are visible within the viral code in infected files.
Method of Infection
The only way to infect a computer with a file infecting virus is to execute an infected file on the computer. The infected file may come from a multitude of sources including: floppy diskettes, downloads through an online service, network, etc. Once the infected file is executed, the virus may activate.
Removal
All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.
PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:
Additional Windows ME/XP removal considerations
Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.
AVERT Recommended Updates :
* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )
* scriptlet.typelib/Eyedog vulnerability patch
* Outlook as an email attachment security update
* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield
For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .
It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.
Variants
Variants
- Messy
All Information
Overview -
This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.
Aliases
- Bomb
Characteristics
Characteristics -
Bomber is a stealth, memory resident, file infecting virus. It infects .COM files.
Upon infection, the Bomber virus becomes memory resident at the top of system memory but below the 640K DOS boundary. Interrupt 12's return is not moved. Interrupts 1C, 20, 21, and 22 are hooked by the Bomber virus in memory.
Once the Bomber virus is memory resident, it infects .COM files as they are executed or opened. It also infects all of the .COM files in a directory when a DOS DIR command is issued.
Additional Comments:
The Bomber, or Bomb, virus was received from Malaysia in May, 1992.
This virus is a memory resident infector of .COM files which employs
some stealth technology to avoid detection. It activates on
August 31st, Malaysia's Independence Day.
When the first program infected with the Bomber virus is executed,
the Bomber virus will install itself memory resident at the top of
system memory but below the 640K DOS boundary. Interrupt 12's return
will not be moved. Total system and available free memory, as
indicated by the DOS CHKDSK program, will have decreased by 3,072
bytes. Interrupts 1C, 20, 21, and 22 will be hooked by the Bomber
virus in memory.
Once the Bomber virus is memory resident, it will infect .COM
programs when they are executed or opened. It will also infect all
of the .COM programs in a directory when a DOS DIR command is
issued. Programs infected with the Bomber virus will have a file
length increase of 2,204 bytes, though the increase in size will be
hidden if Bomber is memory resident. The virus will be located at
the beginning of the infected files. Infected programs will not have
their file date and time altered in the DOS disk directory listing.
Bomber is an encrypted virus, and no text strings are visible within
the viral code in infected programs.
The Bomber virus activates on August 31st, Malaysia's Independence
Day. On August 31st, the virus will occassionally emit three beeps
and the following message will be displayed:
"! I AM THE STEALTH BOMBER !
U컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
3 I BELONG TO THE NEW 3
3 GENERATION OF COMPUTER 3
3 VIRUSES. LIKE THE STEALTH 3
3 BOMBER, I GO UNDETECTED 3
3 BY ENEMY RADAR 3
A컴컴컴컴컴컴컴컴컴컴컴컴컴컴U
!!! DO NOT PANIC !!!
I AM SHOWING OFF HOW
EASY I CAN EVADE YOUR ANTI
VIRUS SYSTEM - I DO NO HARM"
Bomber doesn't do anything malicious besides displaying its
message. However, systems infected with the Bomber virus will
experience boot failures after COMMAND.COM becomes infected, as
well as file allocation errors being detected by the DOS CHKDSK
program when Bomber is memory resident. Lastly, the DOS DIR
command will be very sluggish.
Known variant(s) of Bomber are:
Symptoms
Symptoms -
The Bomber virus activates on August 31st, Malaysia's Independence Day. On August 31st, the virus occasionally emits three beeps and the following message is displayed:
"! I AM THE STEALTH BOMBER !
U컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 3 I BELONG TO THE NEW 3 3 GENERATION OF COMPUTER 3 3 VIRUSES. LIKE THE STEALTH 3 3 BOMBER, I GO UNDETECTED 3 3 BY ENEMY RADAR 3 A컴컴컴컴컴컴컴컴컴컴컴컴컴컴U
!!! DO NOT PANIC !!!
I AM SHOWING OFF HOW EASY I CAN EVADE YOUR ANTI VIRUS SYSTEM - I DO NO HARM"
Systems infected with the Bomber virus experience boot failures after COMMAND.COM becomes infected, as well as file allocation errors being detected by the DOS CHKDSK program when Bomber is memory resident. The DOS DIR command may be very sluggish.
Total system and available free memory decreases by 3,072 bytes. Files infected with the Bomber virus have a file length increase of 2,204 bytes. The increase in size is hidden if Bomber is memory resident (Stealth techniques). The virus is located at the beginning of the infected files. Infected files do not have their file date and time altered in the DOS disk directory listing. Bomber is an encrypted virus, and no text strings are visible within the viral code in infected files.
Method of Infection
Method of Infection -
The only way to infect a computer with a file infecting virus is to execute an infected file on the computer. The infected file may come from a multitude of sources including: floppy diskettes, downloads through an online service, network, etc. Once the infected file is executed, the virus may activate.
Removal -
Removal -
All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.
PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:
Additional Windows ME/XP removal considerations
Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.
AVERT Recommended Updates :
* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )
* scriptlet.typelib/Eyedog vulnerability patch
* Outlook as an email attachment security update
* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield
For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .
It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.
Variants
Variants -
- Messy
