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Threat Encyclopedia

TROJ_FAKEAL.SMDP


ALIASES:

TrojanDownloader:Win32/Renos.KF (Microsoft); FakeAlert-MA.gen (McAfee); Trojan.FakeAV (Symantec); PAK:UPX, Packed.Win32.Krap.an (Kaspersky); VirTool.Win32.Obfuscator.hg!b1 (v) (Sunbelt); Trojan-Downloader:W32/Renos.GMR (FSecure)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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:

135,680 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

27 Apr 2012

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:

  • {malware path and file name}.exe
  • %Windows%\msa.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\ROUA3O12PW

It adds the following registry entries:

HKEY_CURRENT_USER\Software\ROUA3O12PW
Vqo6 = "0"

HKEY_CURRENT_USER\Software\ROUA3O12PW
Vqo14 = "0"

HKEY_CURRENT_USER\Software\ROUA3O12PW
Vqo0 = "1cd24df"

HKEY_CURRENT_USER\Software\ROUA3O12PW
Vqo1 = "f92bb2f"

Dropping Routine

This Trojan drops the following files:

  • %Windows%\Tasks\{35DC3473-A719-4d14-B7C1-FD326CA84A0C}.job

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

This report is generated via an automated analysis system.

SOLUTION

Minimum Scan Engine:

9.200

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
    • ROUA3O12PW

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\ROUA3O12PW
    • Vqo6 = "0"
  • In HKEY_CURRENT_USER\Software\ROUA3O12PW
    • Vqo14 = "0"
  • In HKEY_CURRENT_USER\Software\ROUA3O12PW
    • Vqo0 = "1cd24df"
  • In HKEY_CURRENT_USER\Software\ROUA3O12PW
    • Vqo1 = "f92bb2f"

Step 4

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.
  • %Windows%\Tasks\{35DC3473-A719-4d14-B7C1-FD326CA84A0C}.job

Step 5

Scan your computer with your Trend Micro product to delete files detected as TROJ_FAKEAL.SMDP. 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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