TROJ_CUTWAIL.YBK
TrojanDropper:Win32/Cutwail (Microsoft); Trojan-PSW.Win32.Fareit.aqyj (Kaspersky)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
84,992 bytes
EXE
Yes
26 Aug 2104
Arrival Details
This Trojan 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 Trojan drops the following copies of itself into the affected system:
- %User Profile%\guataportemg.exe
(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 drops the following files:
- %User Profile%\porjanfelanp.exe
(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.)
Autostart Technique
This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
porjanfelanp = "%User Profile%\porjanfelanp.exe"
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft
OSVersion = "{7-digit number}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
guataportemgzap = "{hex value}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
AppManagement = "{hex value}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
porjanfelanpzap = "{hex value}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
{10-digit number} = "{hex value}"
HKEY_CURRENT_USER\Software\WinRAR
HWID = "{hex value}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Regedit32 = "%System%\regedit.exe"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Tcpip\Parameters
MaxUserPort = "65534"
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}n.com
- http://{BLOCKED}el.is
- http://{BLOCKED}i.net
- http://{BLOCKED}.{BLOCKED}.164.52/gate.php
- http://{BLOCKED}f.com
- http://{BLOCKED}o.com
- http://{BLOCKED}e.org
- http://{BLOCKED}g.com
- http://{BLOCKED}t.com
- http://{BLOCKED}ch.org
- http://{BLOCKED}f.com.au
- http://{LOCKED}bs.com
- http://{BLOCKED}n.de
- http://{BLOCKED}n.net
- http://{BLOCKED}o.com
- http://{BLOCKED}es.com
- http://{BLOCKED}by.com
- http://{BLOCKED}k.co.th
- http://{BLOCKED}e.com
- http://{BLOCKED}4.{BLOCKED}smtp-in.l.google.com
- http://{BLOCKED}n.co.uk
- http://{BLOCKED}k.com
- http://{BLOCKED}a.com
- http://{BLOCKED}t.com
- http://{BLOCKED}a.com
- http://{BLOCKED}f.de
- http://{BLOCKED}lan.cl
- http://{BLOCKED}e.com.tr
- http://{BLOCKED}x.si
- http://{BLOCKED}.co.za
- http://{BLOCKED}lum.cz
- http://{BLOCKED}rx.com
- http://{BLOCKED}ur.lv
- http://{BLOCKED}t.com
- http://{BLOCKED}m.ru
- http://{BLOCKED}x.hu
- http://{BLOCKED}op.nl
- http://{BLOCKED}a.com
- http://{BLOCKED}x.com
- http://{BLOCKED}w.com
- http://{BLOCKED}sa.org
- http://{BLOCKED}l.com
- http://{BLOCKED}m.org
- http://{BLOCKED}gg.no
- http://{BLOCKED}n.de
- http://{BLOCKED}r.com.tr
- http://{BLOCKED}an.com
- http://{BLOCKED}ow.com
- http://{BLOCKED}t.net
- http://{BLOCKED}l.com
- http://{BLOCKED}h.ba
- http://{BLOCKED}hc.org
- http://{BLOCKED}m.com
- http://{BLOCKED}al.ch
- http://{BLOCKED}o.ru
- http://{BLOCKED}s.fr
- http://{BLOCKED}f.com
- http://{BLOCKED}az.com
- http://{BLOCKED}l.es
- http://{BLOCKED}l.it
- http://{BLOCKED}t.com.au
- http://{BLOCKED}u.com
- http://{BLOCKED}ns.com
- http://{BLOCKED}f.org
- http://{BLOCKED}a.net
- http://{BLOCKED}e.ro
- http://{BLOCKED}m.de
- http://{BLOCKED}zug.de
- http://{BLOCKED}n.com
- http://{BLOCKED}ns.org
- http://{BLOCKED}i.com
- http://{BLOCKED}m.cz
- http://{BLOCKED}g.de
- http://{BLOCKED}c.com
- http://{BLOCKED}e.com
- http://{BLOCKED}p.com
- http://{BLOCKED}op.com
- http://{BLOCKED}o.com
- http://{BLOCKED}m.cz
- http://{BLOCKED}s.cl
- http://{BLOCKED}s.com.au
- http://{BLOCKED}s.com
- http://{BLOCKED}z.org
- http://{BLOCKED}l.com
- http://{BLOCKED}a.com
- http://{BLOCKED}d.org.tr
- http://{BLOCKED}e.com
- http://{BLOCKED}w.net
- http://{BLOCKED}a.co.za
- http://{BLOCKED}h.com.tr
- http://{BLOCKED}e.com
- http://{BLOCKED}c.net
- http://{BLOCKED}s.com
- http://{BLOCKED}i.biz
- http://{BLOCKED}ty.com
- http://{BLOCKED}n.com
- http://{BLOCKED}her.cc
- http://{BLOCKED}h.com
- http://{BLOCKED}g.com
- http://{BLOCKED}ic.com
- http://{BLOCKED}d.com
- http://{BLOCKED}smtp-in.l.google.com
- http://{BLOCKED}.gb.com
- http://{BLOCKED}op.com
- http://{BLOCKED}s.nl
- http://{BLOCKED}c.com
- http://{BLOCKED}am.com
- http://{BLOCKED}y.us
- http://{BLOCKED}u.net
- http://{BLOCKED}a.cz
- http://{BLOCKED}me.com
- http://{BLOCKED}r.net
- http://{BLOCKED}l.com
- http://{BLOCKED}er.com
- http://{BLOCKED}c.com
- http://{BLOCKED}s.pt
- http://{BLOCKED}h.de
- http://{BLOCKED}k.com
- http://{BLOCKED}e.ch
- http://{BLOCKED}j.org
- http://{BLOCKED}ox.com:8080/2A490FE/2d075.bin
- http://{BLOCKED}m.it
- http://{BLOCKED}i.com
- http://{BLOCKED}d.org
- http://{BLOCKED}l.biz
- http://{BLOCKED}1.{BLOCKED}p.messagingengine.com
- http://{BLOCKED}a.com
- http://{BLOCKED}ard.pt
- http://{BLOCKED}o.pl
- http://{BLOCKED}isc.de
- http://{BLOCKED}c.com
- http://{BLOCKED}an.net
- http://{BLOCKED}a.org.tw
- http://{BLOCKED}1.co.kr
- http://{BLOCKED}o.co.uk
- http://{BLOCKED}h.org
- http://{BLOCKED}y.com
- http://{BLOCKED}ia.com
- http://{BLOCKED}e.net
- http://{BLOCKED}o.com
- http://{BLOCKED}in.com
- http://{BLOCKED}l.com
- http://{BLOCKED}i.{BLOCKED}c.jp
- http://{BLOCKED}t.com
- http://{BLOCKED}r.com
- http://{BLOCKED}ku.com
- http://{BLOCKED}j.{BLOCKED}o.jp
- http://{BLOCKED}2.com
- http://{BLOCKED}f.dk
- http://{BLOCKED}n.com
- http://{BLOCKED}m.com
- http://{BLOCKED}n.com
- http://{BLOCKED}a.org.uk
- http://{BLOCKED}at.com
- http://{BLOCKED}an.pl
- http://{BLOCKED}1.com
- http://{BLOCKED}er.com
- http://{BLOCKOED}yc.com
- http://{BLOCKED}ty.com
- http://{BLOCKED}m.pt
- http://{BLOCKED}m.pl
- http://{BLOCKED}7.{BLOCKED}lwaves.co.nz
- http://{BLOCKED}f.ca
- http://{BLOCKED}go.net
- http://{BLOCKED}e.ca
- http://{BLOCKED}a.com
- http://{BLOCKED}rt.com
- http://{BLOCKED}n.com
- http://{BLOCKED}a.com
- http://{BLOCKED}a.de
- http://{BLOCKED}e.com
- http://{BLOCKED}m.com
- http://{BLOCKED}es.com
- http://{BLOCKED}s.com
- http://{BLOCKED}o.com
- http://{BLOCKED}a.pt
- http://{BLOCKED}l.{BLOCKED}o.uk
- http://{BLOCKED}p.net
- http://{BLOCKED}x.fr
- http://{BLOCKED}p.hu
- http://{BLOCKED}os.ch
- http://{BLOCKED}c.us
- http://{BLOCKED}m.com
- http://{BLOCKED}s.{BLOCKED}l.ru
- http://{BLOCKED}e.com
- http://{BLOCKED}1.com
- http://{BLOCKED}s.com
- http://{BLOCKED}m.{BLOCKED}m.lb
- http://{BLOCKED}l.cc
- http://{BLOCKED}d.nl
- http://{BLOCKED}n.de
- http://{BLOCKED}an.com
- http://{BLOCKED}ma.com
- http://{BLOCKED}n.com
- http://{BLOCKED}c.org.uk
- http://{BLOCKED}e.com
- http://{BLOCKED}o.com
- http://{BLOCKED}s.de
- http://{BLOCKED}o7.com
- http://{BLOCKED}g.org
- http://{BLOCKED}ce.org
- http://{BLOCKED}5.com
- http://{BLOCKED}ls.com
- http://{BLOCKED}d.{BLOCKED}akume.com
- http://{BLOCKED}o.net
- http://{BLOCKED}nj.com
- http://{BLOCKED}a.co.in
- http://{BLOCKED}n.com
- http://{BLOCKED}is.com
- http://{BLOCKED}ia.pl
- http://{BLOCKED}s.jp
- http://{BLOCKED}s.com
- http://{BLOCKED}s.org
- http://{BLOCKED}i.net
- http://{BLOCKED}i.net
- http://{BLOCKED}s.org
- http://{BLOCKED}me.com
- http://{BLOCKED}n.com
- http://{BLOCKED}c.com
- http://{BLOCKED}la.org
- http://{BLOCKED}s.net
- http://{BLOCKED}it.cz
- http://{BLOCKED}eti.ru
- http://{BLOCKED}c.nl
- http://{BLOCKED}n.cz
- http://{BLOCKED}erl.de
- http://{BLOCKED}p.{BLOCKED}t.au
- http://{BLOCKED}f.org
- http://{BLOCKED}l.com
- http://{BLOCKED}r.com
- http://{BLOCKED}pa.com
- http://{BLOCKED}a.com
- http://{BLOCKED}w.org
- http://{BLOCKED}er.com
- http://{BLOCKED}ux.cz
- http://{BLOCKED}l.org
- http://{BLOCKED}a.org
- http://{BLOCKED}p.de
- http://{BLOCKED}o.pt
- http://{BLOCKED}r.com
- http://{BLOCKED}r.at
- http://{BLOCKED}a.com
- http://{BLOCKED}la.nl
- http://{BLOCKED}g.org
- http://{BLOCKED}w.com
- http://{BLOCKED}d.net
- http://{BLOCKED}t.de
- http://{BLOCKED}st.com
- http://{BLOCKED}n.co.jp
- http://{BLOCKED}up.com
- http://{BLOCKED}ek.com
- http://{BLOCKED}a.com
- http://{BLOCKED}dia.pl
- http://{BLOCKED}c.co.uk
- http://{BLOCKED}a.net
- http://{BLOCKED}et.jp
- http://{BLOCKED}t.ru
- http://{BLOCKED}m.net
- http://{BLOCKED}p.cz
- http://{BLOCKED}s.com
- http://{BLOCKED}e.com
- http://{BLOCKED}u.net
- http://{BLOCKED}s.fi
- http://{BLOCKED}l.org
- http://{BLOCKED}o.org
- http://{BLOCKED}e.com
- http://{BLOCKED}dia.in
- http://{BLOCKED}it.com
- http://{BLOCKED}x.hu
- http://{BLOCKED}t.com
- http://{BLOCKED}n.com
- http://{BLOCKED}c.com
- http://{BLOCKED}l.net
- http://{BLOCKED}ch.at
- http://{BLOCKED}n.com
- http://{BLOCKED}c.com.ua
- http://{BLOCKED}t.dk
- http://www.{BLOCKED}e.com
- http://{BLOCKED}1.com
- http://{BLOCKED}6.com
- http://{BLOCKED}m.es
- http://{BLOCKED}p.org.uk
- http://{BLOCKED}5.net
- http://{BLOCKED}t.com
- http://{BLOCKED}l.net
- http://{BLOCKED}ts.net
- http://{BLOCKED}p.com
- http://{BLOCKED}a.ru
- http://{BLOCKED}r.nl
- http://{BLOCKED}l.net
- http://{BLOCKED}n.com
- http://{BLOCKED}o.com
- http://{BLOCKED}n.com
It deletes the initially executed copy of itself
SOLUTION
9.700
11.110.04
26 Aug 2104
11.111.00
27 Aug 2014
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Restart in Safe Mode
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_CURRENT_USER\Software\WinRAR
- HWID = "{hex value}"
- HWID = "{hex value}"
- In HKEY_CURRENT_USER\Software\Microsoft
- OSVersion = "{7-digit number}"
- OSVersion = "{7-digit number}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- guataportemgzap = "{hex value}"
- guataportemgzap = "{hex value}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- AppManagement = "{hex value}"
- AppManagement = "{hex value}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- porjanfelanpzap = "{hex value}"
- porjanfelanpzap = "{hex value}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- {10-digit number} = "{hex value}"
- {10-digit number} = "{hex value}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- porjanfelanp = "%User Profile%\porjanfelanp.exe"
- porjanfelanp = "%User Profile%\porjanfelanp.exe"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Regedit32 = "%System%\regedit.exe"
- Regedit32 = "%System%\regedit.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
- MaxUserPort = "65534"
- MaxUserPort = "65534"
Step 5
Search and delete this file
- %User Profile%\guataportemg.exe
- %User Profile%\porjanfelanp.exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CUTWAIL.YBK. 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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