Content
BackDoor-DMG
- Type
- Trojan
- SubType
- Remote Access
- Discovery Date
- 09/07/2007
- Length
- Varies
- Minimum DAT
- 5115 (09/07/2007)
- Updated DAT
- 5342 (07/18/2008)
- Minimum Engine
- 5.2.00
- Description Added
- 09/07/2007
- Description Modified
- 08/06/2008 10:33 PM (PT)
Tab Navigation
Characteristics
BackDoor-DMG was often found to be installed through spamming of exploits by means of targeting PDF and CHM vulnerabilities. These exploits were detected as either Exploit-PDF.b or BackDoor-DMG!chm.
When run, it connects to the following site(s) to receive instructions that are Base64-encrypted:
- 203.220.22.138
- ugwireless.com
At the time of writing, the site(s) did not send any active instructions. The possible active instructions it may send include at least the following:
- getfile
- exit
- cd
- quit
This enables the backdoor to upload/download and execute arbitrary files from any directory.
It can also create the following MUTEX to ensure one copy is run at any one time:
- L!A@O#Y$A%O
It also hooks system start-up with the following registry key(s):
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
Symptoms
- Presence of the files/registry keys mentioned.
- Unexpected connection to the mentioned site(s).
Method of Infection
BackDoor-DMG was often found to be installed through spamming of exploits by means of targeting PDF and CHM vulnerabilities. These exploits were detected as either Exploit-PDF.b or BackDoor-DMG!chm.
Removal
AVERT recommends to always use latest DATs and engine. This threat will be cleaned if you have this combination.
Variants
Variants
N/A
All Information
Overview -
This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.
Characteristics
Characteristics -
BackDoor-DMG was often found to be installed through spamming of exploits by means of targeting PDF and CHM vulnerabilities. These exploits were detected as either Exploit-PDF.b or BackDoor-DMG!chm.
When run, it connects to the following site(s) to receive instructions that are Base64-encrypted:
- 203.220.22.138
- ugwireless.com
At the time of writing, the site(s) did not send any active instructions. The possible active instructions it may send include at least the following:
- getfile
- exit
- cd
- quit
This enables the backdoor to upload/download and execute arbitrary files from any directory.
It can also create the following MUTEX to ensure one copy is run at any one time:
- L!A@O#Y$A%O
It also hooks system start-up with the following registry key(s):
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
Symptoms
Symptoms -
- Presence of the files/registry keys mentioned.
- Unexpected connection to the mentioned site(s).
Method of Infection
Method of Infection -
BackDoor-DMG was often found to be installed through spamming of exploits by means of targeting PDF and CHM vulnerabilities. These exploits were detected as either Exploit-PDF.b or BackDoor-DMG!chm.
Removal -
Removal -
AVERT recommends to always use latest DATs and engine. This threat will be cleaned if you have this combination.
Additional Windows ME/XP removal considerations
Variants
Variants -
N/A
