PE_EXPIRO.MKI
Virus.Win32.Expiro.w (Kaspersky); Virus:Win32/Expiro.AZ (Microsoft)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: File infector
Destructiveness: No
Encrypted: Yes
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.
It infects files by overwriting code in the entry point and saving the overwritten code in the virus body. It then appends the virus body to the host file.
It connects to a website to send and receive information.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
Varies
EXE
Yes
03 Aug 2012
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.
Installation
This file infector drops the following files:
- %Application Data%\wsr{two random numbers}zt{two random numbers}.dll
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- kkq-vx-mtx{number}
- gazavat-svc
File Infection
This file infector infects files by overwriting code in the entry point and saving the overwritten code in the virus body. It then appends the virus body to the host file.
Backdoor Routine
This file infector connects to the following websites to send and receive information:
- {BLOCKED}vrc-usb10bitz.com
- {BLOCKED}o-pestarz.ru
- {BLOCKED}ational-spcsz.ru
- {BLOCKED}axxlubz.ru
- {BLOCKED}vrc-usb10bitz.com
- {BLOCKED}vvz.net
- {BLOCKED}-ydyg.ru
- {BLOCKED}bugin.com
- {BLOCKED}bikav.com
- {BLOCKED}boneb.com
- {BLOCKED}-aquh.ru
- {BLOCKED}betop.com
- {BLOCKED}.{BLOCKED}.19.33
- www.{BLOCKED}-locmocz.ws
- www.{BLOCKED}ckshopsz.ru
- {BLOCKED}ckshopsz.ru
- {BLOCKED}ashingz.cc
Download Routine
As of this writing, the said sites are inaccessible.
NOTES:
This malware may also arrive as an infected file.
SOLUTION
8.900
9.301.00
03 Aug 2012
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
Search and delete this file
There may be some component 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.
- %Application Data%\wsr{two random numbers}zt{two random numbers}.dll
Step 3
Scan your computer with your Trend Micro product to clean files detected as PE_EXPIRO.MKI. 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.
Step 4
Scan your computer with your Trend Micro product to delete files detected as PE_EXPIRO.MKI. 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.
Step 5
Search and delete this file
• For Windows Vista and Windows 7 users:
- Click Start>Computer.
- In the Search input box, type the following:
DATA_GENERIC - Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
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