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Threat Encyclopedia

ELF_MARE.C

Malware type: Elf Executable

Aliases: Net-Worm.Linux.Mare.d (Kaspersky), Linux/Lupper.worm.b (McAfee), Linux.Plupii.C (Symantec), Worm/Linux.Lupper.B (Avira), Linux/Lupper-H (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Linux

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Infection Channel 1 : Propagates via software vulnerabilities


Description: 

To get a one-glance comprehensive view of the behavior of this malware, refer to the Behavior Diagram shown below.

ELF_MARE.C Behavior Diagram

Malware Overview

This executable Linux file (ELF) propagates by taking advantage of the XML-RPC for PHP Remote Code vulnerability. It also takes advantage of the Mambo FUNCTION.PHP Arbitrary Command Execution vulnerability.

It generates random IP addresses and appends certain strings to access target systems.

It connects to the Web site http://19{BLOCKED}5.69/supina to download a file into the Temporary folder. The said file is detected by Trend Micro as PERL_MARE.C. The said action increases the threat risk of the affected computer.

Furthermore, it opens UPD port 27015 to connect to specific servers. Once connected, it receives commands from a remote user. The said commands are executed locally on the affected computer, which effectively compromises the affected system's security.

For additional information about this threat, see:

Description created: Feb. 18, 2006 2:21:20 PM GMT -0800


TECHNICAL DETAILS


File type: ELF

Memory resident:  No

Size of malware: 407,576 Bytes

Ports used: UDP Port 27015

Initial samples received on: Feb 18, 2006

Vulnerability used:  XML-RPC for PHP Remote Code, Mambo FUNCTION.PHP Arbitrary Command Execution

Related toPERL_MARE.C

Payload 1: Downloads a file

Payload 2: Compromises system security

Details:

This executable Linux file (ELF) propagates by taking advantage of the XML-RPC for PHP Remote Code vulnerability. It also takes advantage of the Mambo FUNCTION.PHP Arbitrary Command Execution vulnerability.

It generates random IP addresses and appends the following strings to access target systems:

  • /blog/xmlrpc.php
  • /blog/xmlsrv/xmlrpc.php
  • /blogs/xmlsrv/xmlrpc.php
  • /cvs/mambo/
  • /drupal/xmlrpc.php
  • /mambo/
  • /phpgroupware/xmlrpc.php
  • /wordpress/xmlrpc.php
  • /xmlrpc/xmlrpc.php

It connects to the Web site http://19{BLOCKED}5.69/supina to download a file into the Temporary folder. The said file is detected by Trend Micro as PERL_MARE.C.

Furthermore, it opens UDP port 27015 to connect to the following servers:

  • 24.224.174.18
  • 81.223.104.152

Once connected, it receives commands from a remote user. The following commands are executed locally on the affected computer, which effectively compromises the affected system's security:

  • Execute files
  • Kill its process
  • Log its activities
  • Update itself

It runs on Linux operating systems.

Analysis By: Kerr Brynner C. Ang

Revision History:

 
Feb 28, 2006 - Modified Virus Report

SOLUTION


Minimum scan engine version needed: 7.000

Pattern file needed: 3.220.10

Pattern release date: Feb 19, 2006


Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.

Solution:

Note: To fully remove all associated malware, perform the clean solution for PERL_MARE.C.

Running Trend Micro Antivirus

Scan your computer with Trend Micro antivirus and delete files detected as ELF_MARE.C. To do this, Trend Micro customers must download the latest virus pattern file and scan their computer. Other Internet users can use HouseCall, the Trend Micro online virus scanner.

Applying Patches

This malware exploits a known vulnerability in various products. Download and install the corresponding fix patches from the URLs found in the following Web pages:

Refrain from using these products until the appropriate patch has been installed. Trend Micro advises users to download critical patches upon release by vendors.




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