Analysis by: Maydalene Edsel Salvador
 ALIASES:

Rogue:Win32/FakeRean (Microsoft), Fake-SecTool-FLM!63EDB30F5F0D (NAI), Trojan.Win32.FakeAV.go (v) (Sunbelt), W32/Generic.GOJ!tr

 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:

  • 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

Tipo de compactação: 822,784 bytes
Tipo de arquivo: EXE
Residente na memória: Yes
Data de recebimento das amostras iniciais: 11 May 2013

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.

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
Internet Security = {MALWARE_LOCATION}\{MALWARE_FILE_NAME}.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
FRun = "0"

HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
O`ld = "Houdsodu!Rdbtshux"

HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
Q`ui = "B;]whstr]USNK^G@JD@W^MVX/dyd"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}rtal360.com/404.php?id=105

  SOLUTION

Mecanismo de varredura mínima: 9.300
Primeiro arquivo padrão VSAPI: 9.918.02
Data do lançamento do primeiro padrão VSAPI: 03 May 2013
VSAPI OPR Pattern Version: 9.919.00
VSAPI OPR Pattern veröffentlicht am: 04 May 2013

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

Scan your computer with your Trend Micro product and note files detected as TROJ_FAKEAV.LWY

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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
    • Internet Security = {MALWARE_LOCATION}\{MALWARE_FILE_NAME}.exe
  • In HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
    • FRun = "0"
  • In HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
    • O`ld = "Houdsodu!Rdbtshux"
  • In HKEY_CURRENT_USER\Software\{RANDOM_VALUES}
    • Q`ui = "B;]whstr]USNK^G@JD@W^MVX/dyd"

Step 5

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