BKDR_EMDIVI.TRYF
Trojan:Win32/Dynamer!ac (Microsoft); RDN/Generic Downloader.x (McAfee); Downloader.Ponik (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Agent5.ACYP (AVG)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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.
TECHNICAL DETAILS
292,352 bytes
EXE
No
14 Jul 2015
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.
Dropping Routine
This backdoor drops the following files:
- %Common Startup%\{malware file name}.lnk
- %User Startup%\{malware file name}.lnk
(Note: %Common Startup% is the system's shared Startup folder, which is usually C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003, and C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)
Other Details
This backdoor connects to the following possibly malicious URL:
- http://www.{BLOCKED}ko-golf.com/news/index.php
- http://www.{BLOCKED}sub.com/ec/index.php
- http://www.{BLOCKED}norei.com/{5 random numbers}?p=#
- http://jp.{BLOCKED}b.biz/{5 random numbers}?p=#
SOLUTION
9.750
11.806.06
22 Jul 2015
11.807.00
23 Jul 2015
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
Search and delete this file
- %Common Startup%\{malware file name}.lnk
- %User Startup%\{malware file name}.lnk
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_EMDIVI.TRYF. 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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