JS_NEMUCOD.DLDSAMQ
JS.Downloader (Symantec), TrojanDownloader:JS/Swabfex.P (Microsoft), Troj/JSDldr-QU (Sophos)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
TECHNICAL DETAILS
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.
Dropping Routine
This Trojan executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
Download Routine
This Trojan saves the files it downloads using the following names:
- %User Temp$\{random}
- %User Temp$\{random}.exe
Other Details
This Trojan connects to the following possibly malicious URL:
- http://www.opal.{BLOCKED}wer.pl/je19nms
- http://www.{BLOCKED}ruments.com/wf2g3r
- http://terminatorhc.{BLOCKED}s.com/y0bkw5hr
SOLUTION
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
Search and delete these files
- %User Temp$\{random}
- %User Temp$\{random}.exe
Step 4
Scan your computer with your Trend Micro product to delete files detected as JS_NEMUCOD.DLDSAMQ. 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.