BKDR_HUPIG.B
Backdoor.Win32.Small.khm (Kaspersky); W32/Hupig.B!tr.bdr (Fortinet)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It may be injected into processes running in memory.
It executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
Arrival Details
This backdoor 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 backdoor may be injected into processes running in memory.
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- download file
- execute file
- execute command shell (cmd.exe)
- kill process
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- *.dyndns.org
NOTES:
It also connects to the mentioned URL to report system infection and send system information such as:
- hostname
- ip address
- language
- machine name
- OS name
- proxy server
- system time
- username
Note that the language and proxy server information that it sends is hard-coded.
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
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_HUPIG.B. 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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