Modified by: Mark Joseph Manahan
 ALIASES:

TrojanDownloader:Win32/Renos.MV (Microsoft); Downloader-CEW (McAfee); Trojan.FakeAV!gen45 (Symantec); Trojan-Downloader.Win32.CodecPack.ktu (Kaspersky); VirTool.Win32.Obfuscator.hg!b1 (v) (Sunbelt); Trojan.Renos.PBA (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.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

Tipo de compactação: 99,840 bytes
Tipo de arquivo: EXE
Residente na memória: No
Data de recebimento das amostras iniciais: 16 Feb 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.

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = "3a98"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}fishingarts.com/sd56c1d56sc1d56sc.php?=e
  • http://{BLOCKED}ationarts.com/sd56c1d56sc1d56sc.php?=e
  • http://{BLOCKED}rtsworld.com/sd56c1d56sc1d56sc.php?=e

It deletes the initially executed copy of itself

  SOLUTION

Mecanismo de varredura mínima: 9.300
Primeiro arquivo padrão VSAPI: 6.990.08
Data do lançamento do primeiro padrão VSAPI: 12 Apr 2010
VSAPI OPR Pattern Version: 6.991.00
VSAPI OPR Pattern veröffentlicht am: 13 Apr 2010

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 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_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
    • TrapPollTimeMilliSecs = "3a98"

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_RENOS.SMD. 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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