TROJ_KRYPTIK.SFC
RDN/Generic.cf!a (McAfee); Trojan.Gen (Symantec); HEUR:Trojan.Win32.Generic (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan horse Atros.XVL (AVG)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
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.
TECHNICAL DETAILS
430,592 bytes
EXE
No
12 May 2015
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 creates the following folders:
- %System Root%\Documents and Settings\Wilbert
- %User Profile%\Microsoft\CLR Security Config
- %User Profile%\CLR Security Config\v2.0.50727.42
(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Dropping Routine
This Trojan drops the following files:
- %User Temp%\passwordfox.exe
- %User Temp%\iepv.exe
- %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new
- %User Profile%\v2.0.50727.42\security.config.cch.new
- %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new
- %User Temp%\firefox.txt
- %User Temp%\ie.txt
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
Other Details
This Trojan connects to the following possibly malicious URL:
- {BLOCKED}.252.34
This report is generated via an automated analysis system.
SOLUTION
9.750
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
Search and delete these components
- %User Temp%\passwordfox.exe
- %User Temp%\iepv.exe
- %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new
- %User Profile%\v2.0.50727.42\security.config.cch.new
- %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new
- %User Temp%\firefox.txt
- %User Temp%\ie.txt
Step 3
Search and delete these folders
- %System Root%\Documents and Settings\Wilbert
- %User Profile%\Microsoft\CLR Security Config
- %User Profile%\CLR Security Config\v2.0.50727.42
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_KRYPTIK.SFC. 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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