Trojan.Win32.INFOSTEAL.TIDAOCN
Trojan:Win32/Casdet!rfn (Microsoft)
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
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.
It connects to certain websites to send and receive information.
TECHNICAL DETAILS
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.
Installation
This Trojan adds the following folders:
- %AppDataLocal%\chrome
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)
It drops the following component file(s):
- %AppDataLocal%\chrome.crx
- %AppDataLocal%\chrome\content.js
- %AppDataLocal%\chrome\manifest.json
- %AppDataLocal%\chrome\page.js
- %AppDataLocal%\chrome\sec.vbe
- %AppDataLocal%\chrome\background.js
- %AppDataLocal%\{Random Characters}.dat
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)
It adds the following processes:
- cmd /c rundll32 "%AppDataLocal%\zb1lUqwR.dat",DllUnInstall %User Temp%\{Malware Name}.exe %AppDataLocal%\zb1lUqwR.dat
- DllUnInstall %User Temp%\{Malware Name}.exe %AppDataLocal%\zb1lUqwR.dat
- cmd /c rundll32 "%AppDataLocal%\{Random Character}.dat"
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
Other Details
This Trojan connects to the following website to send and receive information:
- http://dazqc4f140wtl.{BLOCKED}ront.net/RSKl
It does the following:
- The following command creates the scheduled task:
- schtasks /create /sc minute /mo 1 /tn "chrome" /tr %AppDataLocal%\chrome\sec.vbe ← Triggered every 1 minute
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)
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
Restart in Safe Mode
Step 4
Search and delete these files
- %AppDataLocal%\chrome.crx
- %AppDataLocal%\chrome\content.js
- %AppDataLocal%\chrome\manifest.json
- %AppDataLocal%\chrome\page.js
- %AppDataLocal%\chrome\sec.vbe
- %AppDataLocal%\chrome\background.js
- %AppDataLocal%\{Random Characters}.dat
Step 5
Search and delete this folder
- %AppDataLocal%\chrome
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win32.INFOSTEAL.TIDAOCN. 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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