PE_DOOVO.A
New Win32 !! (McAfee); W32.Imamihong (Symantec); Virus.Win32.Agent.eb (Kaspersky); LooksLike.Win32.InfectedFile!A (v) (Sunbelt); Win32.Dasinap.A (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
327,680 bytes
EXE
Yes
29 Apr 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.
Autostart Technique
This file infector adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
!CleanupNetMeetingDispDriver = "%System%\rundll32.exe msconf.dll,CleanupNetMeetingDispDriver 0"
Other System Modifications
This file infector adds the following registry keys:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Conferencing\UI\CallMRU
HKEY_CURRENT_USER\SOFTWARE\Policies\
Microsoft\Conferencing
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Conferencing\Audio Control
HKEY_CURRENT_USER\Software\Microsoft\
User Location Service\Client
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
FirstRun = "1"
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkContactRefresh = "0"
HKEY_CURRENT_USER\Software\Microsoft\
WAB\WAB4
OlkFolderRefresh = "0"
It modifies the following registry entries:
HKEY_CURRENT_USER\Identities
Last Username = "Main Identity"
(Note: The default value data of the said registry entry is Main Identity.)
HKEY_CURRENT_USER\Identities
Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
(Note: The default value data of the said registry entry is {C0FE0177-5693-4537-9331-A7402AD82D40}.)
HKEY_CURRENT_USER\Identities
Identity Login = "9853"
(Note: The default value data of the said registry entry is 98053.)
HKEY_CURRENT_USER\Identities
Identity Ordinal = "2"
(Note: The default value data of the said registry entry is 1.)
HKEY_CURRENT_USER\SessionInformation
ProgramCount = "1"
(Note: The default value data of the said registry entry is 2.)
Dropping Routine
This file infector drops the following files:
- %Windows%\explorer.exe
- \?\C:\Program Files\NetMeeting\conf.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other Details
This file infector connects to the following possibly malicious URL:
- http://www.{BLOCKED}oto.com/logo1.jpg
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
Restart in Safe Mode
Step 3
Delete this registry key
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\Conferencing\UI
- CallMRU
- In HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft
- Conferencing
- In HKEY_CURRENT_USER\SOFTWARE\Microsoft\Conferencing
- Audio Control
- In HKEY_CURRENT_USER\Software\Microsoft\User Location Service
- Client
Step 4
Delete this registry value
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
- !CleanupNetMeetingDispDriver = "%System%\rundll32.exe msconf.dll,CleanupNetMeetingDispDriver 0"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- FirstRun = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- OlkContactRefresh = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\WAB\WAB4
- OlkFolderRefresh = "0"
Step 5
Restore this modified registry value
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\Identities
- From: Last Username = "Main Identity"
To: Last Username = ""Main Identity""
- From: Last Username = "Main Identity"
- In HKEY_CURRENT_USER\Identities
- From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
To: Last User ID = ""{C0FE0177-5693-4537-9331-A7402AD82D40}""
- From: Last User ID = "{341F68BA-C841-4200-A7B4-3D5CFF202166}"
- In HKEY_CURRENT_USER\Identities
- From: Identity Login = "9853"
To: Identity Login = ""98053""
- From: Identity Login = "9853"
- In HKEY_CURRENT_USER\Identities
- From: Identity Ordinal = "2"
To: Identity Ordinal = ""1""
- From: Identity Ordinal = "2"
- In HKEY_CURRENT_USER\SessionInformation
- From: ProgramCount = "1"
To: ProgramCount = ""2""
- From: ProgramCount = "1"
Step 6
Search and delete these files
- %Windows%\explorer.exe
- \?\C:\Program Files\NetMeeting\conf.exe
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as PE_DOOVO.A. 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.
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