PE_EXPIRO.EP

May 15, 2013
 ALIASES:

Virus:Win32/Expiro.gen!E (Microsoft); W32/Expiro (McAfee); W32.Xpiro.B (Symantec); Virus.Win32.Expiro.t (Kaspersky); Virus.Win32.Expiro.e (v) (Sunbelt); Win32.Expiro.R (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 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:

254,464 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

14 May 2013

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 deletes the following files:

  • %User Profile%\Cookies\index.dat

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
2103 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
2103 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
2103 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
2103 = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
2103 = "0"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\0
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\1
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\2
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\3
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
Zones\4
1609 = "0"

(Note: The default value data of the said registry entry is 1.)

Dropping Routine

This file infector drops the following files:

  • %System%\magnify.ivr
  • %System%\narrator.ivr
  • %System%\osk.ivr
  • %System%\utilman.ivr
  • %Program Files%\Outlook Express\wab.ivr
  • %System%\cmd.ivr
  • %Program Files%\Windows Media Player\wmplayer.ivr
  • %System%\notepad.ivr
  • %System%\mobsync.ivr
  • %System%\tourstart.ivr
  • %Program Files%\Internet Explorer\IEXPLORE.ivr
  • %Program Files%\Outlook Express\msimn.ivr
  • %System%\rcimlby.ivr
  • %System%\accwiz.ivr
  • %System%\calc.ivr
  • %Program Files%\Windows NT\hypertrm.ivr
  • %System%\mstsc.ivr
  • %System%\sndrec32.ivr
  • %System%\sndvol32.ivr
  • %System%\mspaint.ivr
  • %System%\ntbackup.ivr
  • %System%\charmap.ivr
  • %System%\cleanmgr.ivr
  • %System%\usmt\migwiz.ivr
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.ivr
  • %System%\Restore\rstrui.ivr
  • %Program Files%\Windows NT\Accessories\wordpad.ivr
  • %System%\odbcad32.ivr
  • %System%\freecell.ivr
  • %System%\mshearts.ivr
  • %Program Files%\MSN Gaming Zone\Windows\bckgzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\chkrzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\hrtzzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\Rvsezm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\shvlzm.ivr
  • %System%\winmine.ivr
  • %Program Files%\Windows NT\Pinball\PINBALL.ivr
  • %System%\sol.ivr
  • %System%\spider.ivr
  • %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.ivr
  • %Program Files%\Movie Maker\moviemk.ivr
  • %System%\control.ivr
  • %System%\wupdmgr.ivr
  • %System%\magnify.exe
  • %System%\narrator.exe
  • %System%\osk.exe
  • %System%\utilman.exe
  • %Program Files%\Outlook Express\wab.exe
  • %System%\cmd.exe
  • %Program Files%\Windows Media Player\wmplayer.exe
  • %System%\notepad.exe
  • %System%\mobsync.exe
  • %System%\tourstart.exe
  • %Program Files%\Internet Explorer\IEXPLORE.EXE
  • %Program Files%\Outlook Express\msimn.exe
  • %System%\rcimlby.exe
  • %System%\accwiz.exe
  • %System%\calc.exe
  • %Program Files%\Windows NT\hypertrm.exe
  • %System%\mstsc.exe
  • %System%\sndrec32.exe
  • %System%\sndvol32.exe
  • %System%\mspaint.exe
  • %System%\ntbackup.exe
  • %System%\charmap.exe
  • %System%\cleanmgr.exe
  • %System%\usmt\migwiz.exe
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
  • %System%\Restore\rstrui.exe
  • %Program Files%\Windows NT\Accessories\wordpad.exe
  • %System%\odbcad32.exe
  • %System%\freecell.exe
  • %System%\mshearts.exe
  • %Program Files%\MSN Gaming Zone\Windows\bckgzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\chkrzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\hrtzzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\Rvsezm.exe
  • %Program Files%\MSN Gaming Zone\Windows\shvlzm.exe
  • %System%\winmine.exe
  • %Program Files%\Windows NT\Pinball\PINBALL.EXE
  • %System%\sol.exe
  • %System%\spider.exe
  • %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
  • %Program Files%\Movie Maker\moviemk.exe
  • %System%\control.exe
  • %System%\wupdmgr.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
    • 2103 = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
    • 2103 = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
    • 2103 = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • 2103 = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
    • 2103 = "0"

Step 3

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3
    • From: 1609 = "0"
      To: 1609 = ""1""
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4
    • From: 1609 = "0"
      To: 1609 = ""1""

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %System%\magnify.ivr
  • %System%\narrator.ivr
  • %System%\osk.ivr
  • %System%\utilman.ivr
  • %Program Files%\Outlook Express\wab.ivr
  • %System%\cmd.ivr
  • %Program Files%\Windows Media Player\wmplayer.ivr
  • %System%\notepad.ivr
  • %System%\mobsync.ivr
  • %System%\tourstart.ivr
  • %Program Files%\Internet Explorer\IEXPLORE.ivr
  • %Program Files%\Outlook Express\msimn.ivr
  • %System%\rcimlby.ivr
  • %System%\accwiz.ivr
  • %System%\calc.ivr
  • %Program Files%\Windows NT\hypertrm.ivr
  • %System%\mstsc.ivr
  • %System%\sndrec32.ivr
  • %System%\sndvol32.ivr
  • %System%\mspaint.ivr
  • %System%\ntbackup.ivr
  • %System%\charmap.ivr
  • %System%\cleanmgr.ivr
  • %System%\usmt\migwiz.ivr
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.ivr
  • %System%\Restore\rstrui.ivr
  • %Program Files%\Windows NT\Accessories\wordpad.ivr
  • %System%\odbcad32.ivr
  • %System%\freecell.ivr
  • %System%\mshearts.ivr
  • %Program Files%\MSN Gaming Zone\Windows\bckgzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\chkrzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\hrtzzm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\Rvsezm.ivr
  • %Program Files%\MSN Gaming Zone\Windows\shvlzm.ivr
  • %System%\winmine.ivr
  • %Program Files%\Windows NT\Pinball\PINBALL.ivr
  • %System%\sol.ivr
  • %System%\spider.ivr
  • %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.ivr
  • %Program Files%\Movie Maker\moviemk.ivr
  • %System%\control.ivr
  • %System%\wupdmgr.ivr
  • %System%\magnify.exe
  • %System%\narrator.exe
  • %System%\osk.exe
  • %System%\utilman.exe
  • %Program Files%\Outlook Express\wab.exe
  • %System%\cmd.exe
  • %Program Files%\Windows Media Player\wmplayer.exe
  • %System%\notepad.exe
  • %System%\mobsync.exe
  • %System%\tourstart.exe
  • %Program Files%\Internet Explorer\IEXPLORE.EXE
  • %Program Files%\Outlook Express\msimn.exe
  • %System%\rcimlby.exe
  • %System%\accwiz.exe
  • %System%\calc.exe
  • %Program Files%\Windows NT\hypertrm.exe
  • %System%\mstsc.exe
  • %System%\sndrec32.exe
  • %System%\sndvol32.exe
  • %System%\mspaint.exe
  • %System%\ntbackup.exe
  • %System%\charmap.exe
  • %System%\cleanmgr.exe
  • %System%\usmt\migwiz.exe
  • %Program Files%\Common Files\Microsoft Shared\MSInfo\msinfo32.exe
  • %System%\Restore\rstrui.exe
  • %Program Files%\Windows NT\Accessories\wordpad.exe
  • %System%\odbcad32.exe
  • %System%\freecell.exe
  • %System%\mshearts.exe
  • %Program Files%\MSN Gaming Zone\Windows\bckgzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\chkrzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\hrtzzm.exe
  • %Program Files%\MSN Gaming Zone\Windows\Rvsezm.exe
  • %Program Files%\MSN Gaming Zone\Windows\shvlzm.exe
  • %System%\winmine.exe
  • %Program Files%\Windows NT\Pinball\PINBALL.EXE
  • %System%\sol.exe
  • %System%\spider.exe
  • %Program Files%\MSN\MSNCoreFiles\Install\msnsusii.exe
  • %Program Files%\Movie Maker\moviemk.exe
  • %System%\control.exe
  • %System%\wupdmgr.exe

Step 5

Scan your computer with your Trend Micro product to clean files detected as PE_EXPIRO.EP. 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 6

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Profile%\Cookies\index.dat


Did this description help? Tell us how we did.