TROJ_FAKEAV.ORM

January 31, 2014
 Modified by: Jimelle Monteser
 ALIASES:

Trojan.Win32.FakeAV (Ikarus), Trojan-FakeAV.Win32.SmartFortress2012.adpz (Kaspersky), Rogue:Win32/Winwebsec (Microsoft), Win32/Adware.FakeAV.I application (NOD32)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • 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:

692,224 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

21 Jan 2014

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:

  • %All Users Profile%\Application Data\{random name}\{random name}.exe

(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)

It creates the following folders:

  • %All Users Profile%\Application Data\{random name}
  • %Start Menu%\Programs\AntivirusSecurity Pro

(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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
AS2014 = "%All Users Profile%\Application Data\{random name}\{random name}.exe"

Dropping Routine

This Trojan drops the following files:

  • %All Users Profile%\Application Data\{random name}\{random name}{random}.in
  • %All Users Profile%\Application Data\{random name}\{random name}{random}.lg
  • %All Users Profile%\Application Data\{random name}\{random name}.exe.manifest
  • %All Users Profile%\Application Data\{random name}\{random name}.ico
  • %All Users Profile%\Application Data\{random name}\DD1
  • %All Users Profile%\Application Data\{random name}\DD2
  • %All Users Profile%\Application Data\{random name}\DD3
  • %All Users Profile%\Application Data\{random name}\serv.bat
  • %Desktop%\Antivirus Security Pro support.url
  • %Desktop%\Antivirus Security Pro.lnk
  • %Start Menu%\Programs\AntivirusSecurity Pro
  • %Start Menu%\Programs\AntivirusSecurity Pro\Antivirus Security Pro support.url
  • %Start Menu%\Programs\AntivirusSecurity Pro\Antivirus Security Pro.lnk

(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.. %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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.1.127/api/stats/debug/1/?{random}
  • http://{BLOCKED}.{BLOCKED}.1.127/api/stats/debug/2/?{random}
  • http://{BLOCKED}.{BLOCKED}.1.127/api/stats/debug/3/?{random}
  • http://{BLOCKED}.{BLOCKED}.1.127/api/stats/debug/4/?{random}
  • http://{BLOCKED}.{BLOCKED}1.127/api/dom/no_respond/?{random}
  • http://{BLOCKED}.{BLOCKED}.1.127/api/urls/?{random}

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.556.02

FIRST VSAPI PATTERN DATE:

22 Jan 2014

VSAPI OPR PATTERN File:

10.557.00

VSAPI OPR PATTERN Date:

23 Jan 2014

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

Restart in Safe Mode

[ Learn More ]

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\Windows\CurrentVersion\Run
    • AS2014 = "%All Users Profile%\Application Data\{random name}\{random name}.exe"

Step 4

Search and delete this folder

[ 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.
  • %All Users Profile%\Application Data\{random name}
  • %Start Menu%\Programs\AntivirusSecurity Pro

Step 5

Search and delete this file

[ Learn More ]
There may be some files 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.
  • %Desktop%\Antivirus Security Pro support.url
  • %Desktop%\Antivirus Security Pro.lnk

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.ORM. 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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