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TROJ_DLOADR.UIC

February 10, 2015
 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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

File Size:

1,202,250 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Feb 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:

  • %User Temp%\mrt1.tmp
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsq1E.tmp
  • %System Root%\Documents and Settings\Wilbert

(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.. %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.)

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\mrt1.tmp
  • %System Root%\STRING~1.TXT
  • %System Root%\checkOS.txt
  • %User Temp%\nsg1C.tmp
  • %User Temp%\nsq1E.tmp
  • %System Root%\soft.exe

(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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION

HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\
Camtasia Studio\7.0

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Adobe Licensing Console

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Adobe Licensing Console\Enum

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\Adobe Licensing Console\Security

HKEY_CURRENT_USER\Software\DEF001\
Windows\CurrentVersion\Policies\
System

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
stdrt.exe = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
scrrt.exe = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
stdrtd.exe = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
CertificateRevocation = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnonBadCertRecving = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\
Camtasia Studio\7.0
RegisteredTo = "null"

HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\
Camtasia Studio\7.0
RegistrationKey = "SH5ZZ-85ADS-CXPB5-RGVBC-BA2AR"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
CertificateRevocation = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
WarnonBadCertRecving = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
stdrt.exe = "2711"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
scrrt.exe = "2711"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
stdrtd.exe = "2711"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
Type = "11"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
Start = "2"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
ImagePath = "%SystemRoot%\System32\lnsecsl.exe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
DisplayName = "Adobe Licensing Console"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
ObjectName = "LocalSystem"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
Description = "This service allows console management and licensing for FLEXnet enabled products."

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console
FailureActions = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console\Enum
0 = "Root\LEGACY_ADOBE_LICENSING_CONSOLE\0000"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console\Enum
Count = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console\Enum
NextInstance = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Adobe Licensing Console\Security
Security = "{random values}"

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\mrt1.tmp\stdrt.exe
  • %User Temp%\mrt1.tmp\mmfs2.dll
  • %User Temp%\mrt1.tmp\kclist.mfx
  • %User Temp%\mrt1.tmp\kcfile.mfx
  • %User Temp%\mrt1.tmp\Registry2.mfx
  • %User Temp%\mrt1.tmp\KcWebX.mfx
  • %User Temp%\mrt1.tmp\Download.mfx
  • %User Temp%\mrt1.tmp\Get.mfx
  • %User Temp%\mrt1.tmp\volume.mfx
  • %User Temp%\mrt1.tmp\Yaso.mfx
  • %User Temp%\mrt1.tmp\kcclock.mfx
  • %User Temp%\mrt1.tmp\tgaflt.ift
  • %User Temp%\mrt1.tmp\pngflt.ift
  • %User Temp%\mrt1.tmp\jpgflt.ift
  • %User Temp%\mrt1.tmp\gifflt.ift
  • %User Temp%\mrt1.tmp\fliflt.ift
  • %User Temp%\mrt1.tmp\bmpflt.ift
  • %User Temp%\mrt1.tmp\aviflt.ift
  • %User Temp%\mrt1.tmp\pcxflt.ift
  • version.txt
  • x86detect.bat
  • soft.exe
  • get.dat
  • apply.reg
  • apply.bat
  • checkOS.txt
  • StringCheck.txt
  • %User Profile%\Application Data\ICCVID.DR_
  • %User Temp%\nsq1E.tmp\arums.dll

(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.. %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:

  • http://{BLOCKED}45.103/BOT/soft.exe
  • http://{BLOCKED}filetube.ru/scpt_x/get.dat
  • http://{BLOCKED}filetube.ru/scpt_x/1/user_agent/user_agent89.php
  • http://{BLOCKED}filetube.ru/scpt_x/2/user_agent/user_agent143.php
  • http://{BLOCKED}filetube.ru/scpt_x/2/referer/referer143.php
  • http://{BLOCKED}filetube.ru/scpt_x/1/referer/referer89.php
  • http://{BLOCKED}filetube.ru/scpt_x/1/link/link89.php
  • http://{BLOCKED}filetube.ru/scpt_x/2/link/link143.php
  • {BLOCKED}.93.194
  • {BLOCKED}0.1
  • {BLOCKED}.131.200
  • {BLOCKED}.88.123
  • {BLOCKED}.76.175
  • {BLOCKED}.29.82

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
    • FEATURE_BROWSER_EMULATION
  • In HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\Camtasia Studio
    • 7.0
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services
    • Adobe Licensing Console
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Adobe Licensing Console
    • Enum
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\services\Adobe Licensing Console
    • Security
  • In HKEY_CURRENT_USER\Software\DEF001\Windows\CurrentVersion\Policies
    • System

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • stdrt.exe = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • scrrt.exe = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • stdrtd.exe = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • CertificateRevocation = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • WarnonBadCertRecving = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\Camtasia Studio\7.0
    • RegisteredTo = "null"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\TechSmith\Camtasia Studio\7.0
    • RegistrationKey = "SH5ZZ-85ADS-CXPB5-RGVBC-BA2AR"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • CertificateRevocation = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • WarnonBadCertRecving = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • stdrt.exe = "2711"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • scrrt.exe = "2711"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
    • stdrtd.exe = "2711"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • Type = "11"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • Start = "2"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • ImagePath = "%SystemRoot%\System32\lnsecsl.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • DisplayName = "Adobe Licensing Console"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • ObjectName = "LocalSystem"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • Description = "This service allows console management and licensing for FLEXnet enabled products."
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console
    • FailureActions = "{random values}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console\Enum
    • 0 = "Root\LEGACY_ADOBE_LICENSING_CONSOLE\0000"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console\Enum
    • Count = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console\Enum
    • NextInstance = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Adobe Licensing Console\Security
    • Security = "{random values}"

Step 4

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\mrt1.tmp\stdrt.exe
  • %User Temp%\mrt1.tmp\mmfs2.dll
  • %User Temp%\mrt1.tmp\kclist.mfx
  • %User Temp%\mrt1.tmp\kcfile.mfx
  • %User Temp%\mrt1.tmp\Registry2.mfx
  • %User Temp%\mrt1.tmp\KcWebX.mfx
  • %User Temp%\mrt1.tmp\Download.mfx
  • %User Temp%\mrt1.tmp\Get.mfx
  • %User Temp%\mrt1.tmp\volume.mfx
  • %User Temp%\mrt1.tmp\Yaso.mfx
  • %User Temp%\mrt1.tmp\kcclock.mfx
  • %User Temp%\mrt1.tmp\tgaflt.ift
  • %User Temp%\mrt1.tmp\pngflt.ift
  • %User Temp%\mrt1.tmp\jpgflt.ift
  • %User Temp%\mrt1.tmp\gifflt.ift
  • %User Temp%\mrt1.tmp\fliflt.ift
  • %User Temp%\mrt1.tmp\bmpflt.ift
  • %User Temp%\mrt1.tmp\aviflt.ift
  • %User Temp%\mrt1.tmp\pcxflt.ift
  • version.txt
  • x86detect.bat
  • soft.exe
  • get.dat
  • apply.reg
  • apply.bat
  • checkOS.txt
  • StringCheck.txt
  • %User Profile%\Application Data\ICCVID.DR_
  • %User Temp%\nsq1E.tmp\arums.dll

Step 5

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Temp%\mrt1.tmp
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsq1E.tmp
  • %System Root%\Documents and Settings\Wilbert

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_DLOADR.UIC. 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.

Step 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\mrt1.tmp
  • %System Root%\STRING~1.TXT
  • %System Root%\checkOS.txt
  • %User Temp%\nsg1C.tmp
  • %User Temp%\nsq1E.tmp
  • %System Root%\soft.exe


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