BKDR_DEMTRAN.SM
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This malware is dropped by TROJ_ADOBFP.SMA.
It checks if proxy is enabled on the affected system by checking certain registry entries.
It connects to certain malicious servers and URLs, and waits for commands from a remote malicious user.
It retrieves specific information from the affected system.
This backdoor may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware.
TECHNICAL DETAILS
Arrival Details
This backdoor may be downloaded by other malware/grayware/spyware from remote sites.
It may be dropped by the following malware:
- TROJ_ADOBFP.SMA
Backdoor Routine
This backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}2.{BLOCKED}3.82.99
NOTES:
Information Theft
This backdoor retrieves the following information from the affected system:
- user name
- host name
- IP address
- Windows version
Other Details
This malware checks if proxy is enabled by checking the following registry entries:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyServer
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
Proxyenable
- {BLOCKED}2.{BLOCKED}3.82.99\AES{random}O{encrypted data}.jsp?{encrypted data}
- {BLOCKED}2.{BLOCKED}3.82.99\SUS{random}O{random}.jsp?{encrypted data}
- {BLOCKED}2.{BLOCKED}3.82.99\SEU{random}O{random}.jsp?{encrypted data}
- {BLOCKED}2.{BLOCKED}3.82.99\ZES{random}O{random}.jsp?{encrypted data}
- {BLOCKED}2.{BLOCKED}3.82.99\PES{random}O{random}.jsp?{encrypted data}
- exit (terminate)
- put (download file)
- sleep
- dos (execute specified command)
- run (create process)
SOLUTION
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Terminate a process file/s detected as BKDR_DEMTRAN.SM
*Note: If the detected file/s is/are not displayed in theWindows Task Manager, continue doing the next steps.
Step 3
Scan your computer with your Trend Micro product to delete files detected as BKDR_DEMTRAN.SM. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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