Worm:W32/Kaxela.A

Classification

Malware

Worm

W32

Worm:W32/Kaxela.A, Backdoor.Win32.Agent.msv, Worm:Win32/Winko.A (Microsoft), TROJ_NSPM.JR (Trend Micro), W32/Winko.worm.gen (McAfee), Packed.Generic.115 (Symantec)

Summary

Kaxela is a type of autorun worm that propogates through infected disks and removable drives. This means that a user must physically connect the disk or drive to their system to become infected.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

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User Guide

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Submit a sample

Submit a file or URL for further analysis.

Technical Details

The worm infects the system by dropping a copy of itself and the autorun.inf file into the drive. During the infection process, the worm will make copies of itself and place them in various, randomly generated files, then delete the original copy of the worm.

Once installed, the worm will also attempt to connect to two sites, most likely in order to send information, to download malicious programs or to receive further commands.

File System Changes

Creates these files:

  • %System%\[Random].DLL
  • %System%\[Random].EXE
  • C:\autorun.inf
  • C:\auto.exe
  • %System%\delme.bat

Process Changes

Uses these temporary processes:

  • %System%\[Random].EXE

These modules were loaded into other processes:

  • %System%\[Random].DLL

Writes in memory of these processes:

  • %System%\services.exe
  • %System%\lsass.exe
  • %System%\svchost.exe

Network Connections

Attempts to download files from:

  • https://alexa.verynx.cn//[...]xa.txt

Attempts to connect to:

  • https://211.100.21.4/[..].cnt

Registry Modifications

Sets these values:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[random] = "%System%\[random].EXE -k"

Creates these keys:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[random]
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_[random]

Deletes these keys:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ERSvc

Date Created: 2008-07-18 09:50:03.0

Date Last Modified: 2008-09-09 07:49:24.0