BKDR_CHISTON.A
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 runs certain commands that it receives remotely from a malicious user. Doing this puts the affected computer and information found on the computer at greater risk.
TECHNICAL DETAILS
48,128 bytes
No
02 Aug 2018
Connects to URLs/IPs, Compromises system security, Modifies system registry, Terminates processes
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.
Autostart Technique
This Backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
ConfigTool = {malware path}\{malware name}.exe
Other System Modifications
This Backdoor adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\ODBC
it = {hex values}
HKEY_LOCAL_MACHINE\SOFTWARE\ODBC
id = {id}
Backdoor Routine
This Backdoor executes the following command(s) from a remote malicious user:
- File System Commands
- List Processes
- Terminate Processes
- Find Files
Other Details
This Backdoor does the following:
- Resolve its C&C server by sending a query to a DNS Server using the following:
- {random}.t.{BLOCKED}y.com
- Can terminate the following Anti Virus products:
- ACAAS
- ArcaConfSV
- cmdagent
- freshclam
- a2service
- FPAVServer
- FortiScand
- NSESVC
- scanwscs
- Vba32Ldr
- SavService
- K7RTScan
- SpySweeper
- avpmapp
- AvastSvc
- PavFnSvr
- MPSvc
- avp core
- ServiceShell
- GDFwSvc
- fsdfwd
- mcshield
- vsserv
- MsMpEng
- avgwdsvc
- ccSvcHst
- KVSrvX
- kxescore
- RavMonD
- zhudongfangyu
- 360rp
- avguard
- ekrn
SOLUTION
9.850
14.418.07
02 Aug 2018
14.419.00
03 Aug 2018
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
Step 4
Delete this registry value
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\ODBC
- it = {hex values}
- it = {hex values}
- In HKEY_LOCAL_MACHINE\SOFTWARE\ODBC
- id = {id}
- id = {id}
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- ConfigTool = {malware path}\{malware name}.exe
- ConfigTool = {malware path}\{malware name}.exe
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_CHISTON.A. 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.
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_CHISTON.A. 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 the following Trend Micro Support pages for more information:
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