Virus:TR/Drop.Agent.avam
Date discovered:26/10/2009
Type:Trojan
Subtype:Dropper
In the wild:Yes
Reported Infections:Medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:745.472 Bytes
MD5 checksum:0C59eadc2628f66819ee0F76f5eeb910
IVDF version:7.01.04.220 - Saturday, July 11, 2009

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan.Win32.Obfuscated.whl
   •  Sophos: W32/IRCBot-ADJ
   •  Panda: Bck/Mircbased.BT
   •  Eset: IRC/Cloner.BX trojan
   •  Bitdefender: Trojan.AgentMB.ITGL3168337


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Disable security applications
   • Drops files
   • Drops malicious files
   • Lowers security settings
   • Registry modification
   • Third party control

 Files It copies itself to the following locations:
   • %PROGRAM FILES%\Microsoft Office\OFFICE11\ WINWORD.EXE
   • %PROGRAM FILES%\Microsoft Office\OFFICE11\services.exe
   • %Start Menu%\Programs\Startup\Adobe Gamma Loader.com



It creates the following directory:
   • %PROGRAM FILES%\Microsoft Office\OFFICE11



The following files are created:

– %PROGRAM FILES%\Microsoft Office\OFFICE11\Drvics32.dll Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\hjwgsd.dll Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\jwiegh.dll Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\remote.ini Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\ruimsbbe.dll Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\control.ini Contains parameters used by the malware.
– %PROGRAM FILES%\Microsoft Office\OFFICE11\PUB60SP.mrc Further investigation pointed out that this file is malware, too. Detected as: WORM/IrcBot.7385.A

– %PROGRAM FILES%\Microsoft Office\OFFICE11\yofc.dll Further investigation pointed out that this file is malware, too. Detected as: IRC/Zapchast.YF

– %PROGRAM FILES%\Microsoft Office\OFFICE11\smss.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Spy.576628.2

 Registry The following registry key is added in order to run the process after reboot:

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Shell"="Explorer.exe, %PROGRAM FILES%\Microsoft Office\OFFICE11\services.exe"



The values of the following registry key are removed:

–  [HKCU\Software\Microsoft\windows\CurrentVersion\Internet Settings]
   • "ProxyServer"
   • "ProxyOverride"
   • "AutoConfigURL"

–  [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\
   %all registry keys%]
–  [HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\
   %all registry keys%]


The following registry keys are added:

– [HKCR\exefile]
   • "NeverShowExt"=""

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\Acha.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\registry.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\AmyMastura.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\csrsz.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\SMSSS.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\lsasc.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\BabyRina.exe]
   • "Debugger"="cmd.exe /c del"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\wscript.exe]
   • "Debugger"="rundll32.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\cscript.exe]
   • "Debugger"="rundll32.exe"

– [HKLM\SOFTWARE\Microsoft\Security Center\Svc]
   • "AntiVirusDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "FirewallOverride"=dword:00000001
   • "FirstRunDisabled"=dword:00000001
   • "UpdatesDisableNotify"=dword:00000001
   • "UacDisableNotify"=dword:00000001

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system]
   • "EnableLUA"=dword:00000000



The following registry keys are changed:

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "ShowSuperHidden"="0x0"
   • "SuperHidden"="0x0"

Various Explorer settings:
– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\SuperHidden]
   New value:
   • "CheckedValue"=dword:00000000
   • "UncheckedValue"=dword:00000000
   • "DefaultValue"=dword:00000000

– [HKLM\SOFTWARE\Microsoft\Security Center]
   New value:
   • "AntiVirusDisableNotify"=dword:00000001
   • "FirewallDisableNotify"=dword:00000001
   • "UpdatesDisableNotify"=dword:00000001
   • "AntiVirusOverride"=dword:00000001
   • "FirewallOverride"=dword:00000001
   • "FirstRunDisabled"=dword:00000001
   • "UacDisableNotify"=dword:00000001

– [HKLM\SYSTEM\CurrentControlSet\Services\wuauserv]
   New value:
   • "Type"=dword:00000004
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess]
   New value:
   • "Type"=dword:00000004
   • "Start"=dword:00000004

– [HKLM\SYSTEM\CurrentControlSet\Services\WinDefend]
   New value:
   • "Type"=dword:00000004
   • "Start"=dword:00000004

 IRC To deliver system information and to provide remote control it connects to the following IRC Server:

Server: irc.dal.net
Port: 6667
Nickname: Gold_girXls

 Miscellaneous  Checks for an internet connection by contacting the following web sites:
   • www.tourism.gov.my
   • www.miti.gov.my
   • www.putera.com

 Rootkit Technology Hides the following:
– Its own files

 File details Programming language:
 The malware program was written in Visual Basic.

Description inserted by Raluca Georgescu on Monday, October 26, 2009
Description updated by Andrei Ivanes on Tuesday, October 27, 2009

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