TROJ_DLLHIJACK.C
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan may arrive bundled with malware packages as a malware component.
It steals certain information from the system and/or the user.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
136,704 bytes
DLL
Yes
28 Jan 2016
Connects to URLs/IPs, Steals information, Downloads files
Arrival Details
This Trojan may arrive bundled with malware packages as a malware component.
Autostart Technique
This Trojan is a .DLL file that adds the following services:
- Service Name: Dncp
- Display Name: Dncp Client
- Binary Path: %SystemRoot%\System32\svchost.exe -k netsvcs
- Startup Type: SERVICE_AUTO_START
- Account: LocalSystem
It is a .DLL file that adds the following services:
HKLM\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost\
netsvcs
Dncp = ""
HKLM\SYSTEM\CurrentControlSet\
Services\Dncp\Parameters
ServiceDll = "{malware path}\McAltLib.dll"
Backdoor Routine
This Trojan connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}anbox.org:22
Information Theft
This Trojan steals the following information:
- Username
- Hostname
- MAC Address
- IP Address
- CPU Information
- IE User Agent
Other Details
Based on analysis of the codes, it has the following capabilities:
- Steal information
- Remote Control
- Download malware
However, as of this writing, the said sites are inaccessible.
NOTES:
It uses the following exports to download further plugins from the remote server:
- StartWorker
- StopWorker
- WorkerRun
- DllEntryPoint
SOLUTION
9.800
12.302.06
28 Jan 2016
12.303.00
29 Jan 2016
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Restart in Safe Mode, and then delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\netsvcs
- Dncp = ""
- Dncp = ""
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dncp\Parameters
- ServiceDll = "{malware path}\McAltLib.dll"
- ServiceDll = "{malware path}\McAltLib.dll"
Step 4
Disable this malware service
-
- Dncp
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLLHIJACK.C. 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.
Did this description help? Tell us how we did.