TROJ_SCAR.YLK

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.

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 drops the following copies of itself into the affected system:

• %User Temp%\PrintConfig.exe

(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 and 7.)

It creates the following folders:

• %User Profile%\Application Data\dclogs

(Note: %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.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AdobeZ = "%Desktop%\dlexec.exe"

Other System Modifications

This Trojan deletes the following files:

• {malware path and file name}:zone.identifier
• Desktop:Zone.Identifier
• %User Temp%\cmiadapter.exe:Zone.Identifier
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.312.42750
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.312.42750
• %User Profile%\v2.0.50727.42\security.config.cch.312.43140
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.580.65046
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.580.65125
• %User Profile%\v2.0.50727.42\security.config.cch.580.65640
• %User Temp%\PrintConfig.exe:Zone.Identifier
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.1088.76968
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.1088.76968
• %User Profile%\v2.0.50727.42\security.config.cch.1088.77281
• %Application Data%\5826231652013vbc.exe:Zone.Identifier
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.1352.94046
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.1352.94062
• %User Profile%\v2.0.50727.42\security.config.cch.1352.94578
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.1856.102546
• %Windows%\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.1856.102546
• %User Profile%\v2.0.50727.42\security.config.cch.1856.103093

(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 and 7.. %Windows% is the Windows folder, which is usually C:\Windows.. %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.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
oh59OOVq

HKEY_CURRENT_USER\Software\DC3_FEXEC

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
oh59OOVq
UID = "{A759E5A8-1567-40AA-A202-EF962C938120}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
oh59OOVq
19 = "-"

HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "%Windows%\explorer.exe, %User Temp%\cmiadapter.exe"

Dropping Routine

This Trojan drops the following files:

• %Desktop%\dlexec.exe
• %User Temp%\cmiadapter.exe
• %User Profile%\Application Data\phatk.ptx
• %User Profile%\Application Data\usft_ext.dll
• %User Profile%\Application Data\miner.dll
• %User Profile%\Application Data\coinutil.dll
• %User Profile%\Application Data\Adobe-Z.exe
• %Application Data%\5826231652013vbc.exe
• %User Temp%\PrintConfig.exe

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %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 and 7.. %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.. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://www.{BLOCKED}hinfos.com/newtech/miner/phatk.ptx
• http://www.{BLOCKED}hinfos.com/newtech/miner/usft_ext.dll
• http://www.{BLOCKED}hinfos.com/newtech/miner/miner.dll
• http://www.{BLOCKED}hinfos.com/newtech/miner/coinutil.dll
• http://www.{BLOCKED}hinfos.com/newtech/miner/adobeUp.exe
• http://{BLOCKED}camera.comlevotresalo/Panel/bot.php
• http://{BLOCKED}camera.com/levotresalo/Panel/uploads/vbc.exe

This report is generated via an automated analysis system.