TROJ_HWDOOR.A
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This malware is associated with the attacks against the word processing application Hangul Word Processor (HWP), which is able to run PostScript code. The attacks do not involve actual exploits, the attackers instead abuse a feature of PostScript.
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
133,120 bytes
DLL
No
29 Sep 2017
Connects to URLs/IPs
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- https://www.{BLOCKED}sys.com:1091/include/form/goods.asp?idx={number}&no={encoded value}&mode={encoded value}
- http://{BLOCKED}.{BLOCKED}.126.32
- http://{BLOCKED}.{BLOCKED}.103.37
As of this writing, the said sites are inaccessible.
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
Scan your computer with your Trend Micro product to delete files detected as TROJ_HWDOOR.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.
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