WORM_MMS.A

Malware type: Worm

Aliases: IRC/Flood.bv (McAfee), Trojan Horse (Symantec), Worm/Pendex.1 (Avira), W32/Pendex-A (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

Medium

Description: 
This worm propagates via shared network drives. It also has the ability to compromise network security.

This malware is packed using UPX and runs on Windows 95, 98, ME, NT, 2000 and XP.

For additional information about this threat, see:

Description created: May. 20, 2003 12:46:12 AM GMT -0800


TECHNICAL DETAILS


Size of malware: 48,640 bytes

Initial samples received on: May 20, 2003

Related toBAT_FLOOD.BV

Payload 1: Compromises network security

Details:

This worm propagates via shared network drives and has the ability to compromise network security.

Installation

Upon execution, it drops the following batch files in the directory where the malware was executed:

  • SH.BAT (1,061 Bytes)
  • SH2.BAT (424 Bytes)
  • SH3.BAT (464 Bytes)

These batch files are used to execute the worm and give administator privileges to a malicious user. Trend Micro detects these dropped files as BAT_FLOOD.BV.

Autostart Technique

To enable its automatic execution everytime Windows restarts, the worm creates the following registry entry:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ATM Control = "%Path%\ADPN.EXE"

Note that %Path% is the path of the malware file.

Other Details

This malware is packed using UPX.


SOLUTION


Minimum scan engine version needed: 5.200

Pattern file needed: 1.543.08

Pattern release date: May 20, 2003


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:

Identifying the Malware Program

Before proceeding to remove this malware, first identify the malware program.

Scan your system with Trend Micro antivirus and NOTE all files detected as WORM_MMS.A. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro's free online virus scanner.

Terminating the Malware Program

This procedure terminates the running malware process from memory.

  1. Open Windows Task Manager.
    On Windows 9x/ME systems, press
    CTRL%20ALT%20DELETE
    On Windows NT/2000/XP systems, press
    CTRL%20SHIFT%20ESC, and click the Processes tab.
  2. In the list of running programs*, locate the process:
    ADPN.EXE
  3. Select the malware process, then press either the End Task or the End Process button, depending on the version of Windows on your system.
  4. To check if the malware process has been terminated, close Task Manager, and then open it again.
  5. Close Task Manager.

*NOTE: On systems running Windows 9x/ME, Windows Task Manager may not show certain processes. You may use a third party process viewer to terminate the malware process. Otherwise, continue with the next procedure, noting additional instructions.

Removing Autostart Entries from the Registry

Removing autostart entries from the registry prevents the malware from executing during startup.

  1. Open Registry Editor. To do this, click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>Run
  3. In the right panel, locate and delete the entry or entries:
    ATM Control
  4. Close Registry Editor

NOTE: If you were not able to terminate the malware process from memory as described in the previous procedure, restart your system.

Additional Windows ME/XP Cleaning Instructions

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete all files detected as WORM_MMS.A. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro�s free online virus scanner.


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