BKDR_SKYIPOT.Z
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This backdoor may be dropped by other malware.
It adds registry entries to enable its automatic execution at every system startup.
It opens a hidden Internet Explorer window.
TECHNICAL DETAILS
37376 bytes
EXE
Yes
04 Apr 2011
Arrival Details
This backdoor may be dropped by the following malware:
- TROJ_ARTIEF.AZ
Installation
This backdoor drops the following files:
- %UserProfile%\Local Settings\update.dll - also detected as BKDR_SKYIPOT.Z
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\Run
start = "{malware path and filename} -installkys"
Backdoor Routine
This backdoor opens a hidden Internet Explorer window.
Other Details
This backdoor connects to the following possibly malicious URL:
- www.{BLOCKED}cus.com/kys_allow_put.asp?type=put.jpg&hostname={hostname}-{ipaddress}
- www.{BLOCKED}cus.com/kys_allow_get.asp?name=getkys.jpg&hostname={hostname}-{ipaddress}
- www.{BLOCKED}cus.com/getkys.jpg
It does the following:
- Maybe executed using the following parameters:
- removekys
- installkys
SOLUTION
8.900
Step 1
For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 3
Scan your computer with your Trend Micro product and note files detected as BKDR_SKYIPOT.Z
Step 4
Terminate this process
- For Windows 98 and ME users, the Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 5
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- start = "{malware path and filename} -installkys"
- start = "{malware path and filename} -installkys"
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_SKYIPOT.Z 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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