LNK_CHCHES.YSQI
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet, Via email
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It does not have any propagation routine.
It does not have any backdoor routine.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
3,704 bytes
LNK
No
01 Mar 2017
Connects to URLs/IPs
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It 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 Trojan adds the following processes:
- powershell.exe
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- https://{BLOCKED}o.gl/y3GdWF <- redirects to the other URL
- http://m.video.{BLOCKED}petsu.com/src/image/ZWYitfHJti.jpg
As of this writing, the said sites are inaccessible.
Other Details
This Trojan does the following:
- Executes a powershell script for its download routine
- Upon successful download, the download file will be loaded and executed in memory
SOLUTION
9.850
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
Identify and terminate files detected as LNK_CHCHES.YSQI
- 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 3
Scan your computer with your Trend Micro product to delete files detected as LNK_CHCHES.YSQI. 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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