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PE_MADANGEL.D

October 05, 2013
 ALIASES:

Virus:Win32/Madang.A (Microsoft); W32/Alisa.d (McAfee); W32.Madangel (Symantec); Virus.Win32.Small.l (Kaspersky); Virus.Win32.Madang.d (v) (Sunbelt); Win32.Madangel.I (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This file infector 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:

94,922 bytes

File Type:

EXE

Initial Samples Received Date:

30 Sep 2011

Arrival Details

This file infector 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 file infector adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\parameters
AutoShareServer = 1

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\lanmanserver\parameters
AutoShareWks = 1

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Serverx = "%System%\Serverx.exe"

Dropping Routine

This file infector drops the following files:

  • %Windows%\ST5UNST.000

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

Other Details

This file infector connects to the following possibly malicious URL:

  • http://192.{BLOCKED}8.5.150/setupx.dat

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 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\SYSTEM\ControlSet001\Services\lanmanserver\parameters
    • AutoShareServer=1
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\lanmanserver\parameters
    • AutoShareWks=1
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Serverx="%System%\Serverx.exe"

Step 3

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%\ST5UNST.000

Step 4

Scan your computer with your Trend Micro product to clean files detected as PE_MADANGEL.D. 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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