WORM_AUTORUN.APJ
TrojanDropper:Win32/Silly_P2P.B (Microsoft); W32/Autorun.worm.dq.gen (McAfee); W32.SillyFDC (Symantec); Worm.Win32.AutoRun.trs (Kaspersky); Trojan.Win32.Autorun.dm (v) (Sunbelt); Trojan-Dropper:W32/Agent.LOX (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This worm 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
1,584,923 bytes
EXE
No
14 Nov 2011
Arrival Details
This worm 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 worm creates the following folders:
- %User Temp%\E_4
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
Other System Modifications
This worm deletes the following files:
- %User Profile%\Cookies\index.dat
- %Temporary Internet Files%\Content.IE5\2TPM8950\desktop.ini
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\desktop.ini
- %Temporary Internet Files%\Content.IE5\desktop.ini
- %Temporary Internet Files%\Content.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\desktop.ini
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\desktop.ini
- %Temporary Internet Files%\desktop.ini
- %User Profile%\History.IE5\index.dat
- %User Profile%\MSHist012010121320101220\index.dat
- %User Profile%\MSHist012010122820101229\index.dat
- %User Profile%\MSHist012010122920101230\index.dat
- %User Profile%\MSHist012011010220110103\index.dat
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
It deletes the following folders:
- %User Profile%\History.IE5\MSHist012010121320101220
- %User Profile%\History.IE5\MSHist012010122820101229
- %User Profile%\History.IE5\MSHist012010122920101230
- %User Profile%\History.IE5\MSHist012011010220110103
- %User Profile%\History\History.IE5
(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)
Dropping Routine
This worm drops the following files:
- %User Temp%\E_4\krnln.fnr
- %User Temp%\E_4\shell.fne
- %User Temp%\E_4\eAPI.fne
- %User Temp%\E_4\internet.fne
- %User Temp%\E_4\spec.fne
- %User Temp%\E_4\RegEx.fnr
- %User Temp%\E_4\dp1.fne
- %User Temp%\E_4\com.run
- %System%\XP-542ADE6B.EXE
- %System%\ul.dll
- %System%\og.dll
- %System%\og.EDT
- %User Startup%\¡¡¡¡¡¡.lnk
- %System%\com.run
- %System%\dp1.fne
- %System%\eAPI.fne
- %System%\internet.fne
- %System%\krnln.fnr
- %System%\RegEx.fnr
- %System%\shell.fne
- %System%\spec.fne
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Search and delete this folder
- %User Temp%\E_4
Step 3
Search and delete these files
- %User Temp%\E_4\krnln.fnr
- %User Temp%\E_4\shell.fne
- %User Temp%\E_4\eAPI.fne
- %User Temp%\E_4\internet.fne
- %User Temp%\E_4\spec.fne
- %User Temp%\E_4\RegEx.fnr
- %User Temp%\E_4\dp1.fne
- %User Temp%\E_4\com.run
- %System%\XP-542ADE6B.EXE
- %System%\ul.dll
- %System%\og.dll
- %System%\og.EDT
- %User Startup%\¡¡¡¡¡¡.lnk
- %System%\com.run
- %System%\dp1.fne
- %System%\eAPI.fne
- %System%\internet.fne
- %System%\krnln.fnr
- %System%\RegEx.fnr
- %System%\shell.fne
- %System%\spec.fne
Step 4
Scan your computer with your Trend Micro product to delete files detected as WORM_AUTORUN.APJ. 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
Restore these deleted files from backup
*Note: Only Microsoft-related keys/values will be restored. If this malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- %User Profile%\Cookies\index.dat
- %Temporary Internet Files%\Content.IE5\2TPM8950\desktop.ini
- %Temporary Internet Files%\Content.IE5\4H9MXTT9\desktop.ini
- %Temporary Internet Files%\Content.IE5\desktop.ini
- %Temporary Internet Files%\Content.IE5\index.dat
- %Temporary Internet Files%\Content.IE5\SMCZPN4M\desktop.ini
- %Temporary Internet Files%\Content.IE5\X9QQH2D9\desktop.ini
- %Temporary Internet Files%\desktop.ini
- %User Profile%\History.IE5\index.dat
- %User Profile%\MSHist012010121320101220\index.dat
- %User Profile%\MSHist012010122820101229\index.dat
- %User Profile%\MSHist012010122920101230\index.dat
- %User Profile%\MSHist012011010220110103\index.dat
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