ALIASES:

Ransom:Win32/Crowti (Microsoft); RDN/CryptoWall (McAfee); Trojan-Ransom.Win32.Cryptodef.xdx (Kaspersky); Win32.Malware!Drop (Sunbelt); Trojan horse MSIL8.BFQG (AVG)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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 itself after execution.

  TECHNICAL DETAILS

File Size: 253,952 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 07 Aug 2015

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.

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
9d6aa9e = "%System Root%\9d6aa9e3\9d6aa9e3.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
9d6aa9e3 = "%User Profile%\Application Data\9d6aa9e3.exe"

Other System Modifications

This Trojan deletes the following files:

  • %System Root%\9d6aa9e3

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It adds the following registry keys:

HKEY_CURRENT_USER\software\8D32DCFA032285C311440C90B364FD84

HKEY_CURRENT_USER\software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF

It adds the following registry entries:

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
3k = "{random values}"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
2u = "{random characters}"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
dr = "{random characters}"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
cv = "{random characters}"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Internet Explorer\brndlog.bak = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Internet Explorer\brndlog.txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\excel.xls = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\excel4.xls = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\powerpnt.ppt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\quattro.wb2 = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\sndrec.wav = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\winword.doc = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\winword2.doc = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Templates\wordpfct.wpd = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@atdmt[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@bing[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@c.atdmt[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@c.msn[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@doubleclick[1].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@microsoft[1].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@msn[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@scorecardresearch[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@www.bing[2].txt = "68adfd"

HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\
001134444689BCDF
%User Profile%\Cookies\wilbert@www.msn[1].txt = "68adfd"

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SystemRestore
DisableSR = "1"

Dropping Routine

This Trojan drops the following files:

  • %System Root%\9d6aa9e3\9d6aa9e3.exe
  • %User Profile%\Application Data\9d6aa9e3.exe
  • %User Startup%\9d6aa9e3.exe
  • A:\HELP_DECRYPT.TXT
  • A:\HELP_DECRYPT.HTML
  • A:\HELP_DECRYPT.URL
  • A:\HELP_DECRYPT.PNG
  • %User Profile%\Internet Explorer\brndlog.bak.957
  • %User Profile%\Internet Explorer\brndlog.txt.di0
  • %User Profile%\Internet Explorer\HELP_DECRYPT.TXT
  • %User Profile%\Internet Explorer\HELP_DECRYPT.HTML
  • %User Profile%\Internet Explorer\HELP_DECRYPT.URL
  • %User Profile%\Internet Explorer\HELP_DECRYPT.PNG
  • %User Profile%\Microsoft\HELP_DECRYPT.TXT
  • %User Profile%\Microsoft\HELP_DECRYPT.HTML
  • %User Profile%\Microsoft\HELP_DECRYPT.URL
  • %User Profile%\Microsoft\HELP_DECRYPT.PNG
  • %User Profile%\Application Data\HELP_DECRYPT.TXT
  • %User Profile%\Application Data\HELP_DECRYPT.HTML
  • %User Profile%\Application Data\HELP_DECRYPT.URL
  • %User Profile%\Application Data\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD.dv1
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\HELP_DECRYPT.PNG
  • %Application Data%\HELP_DECRYPT.TXT
  • %Application Data%\HELP_DECRYPT.HTML
  • %Application Data%\HELP_DECRYPT.URL
  • %Application Data%\HELP_DECRYPT.PNG
  • %User Profile%\Local Settings\HELP_DECRYPT.TXT
  • %User Profile%\Local Settings\HELP_DECRYPT.HTML
  • %User Profile%\Local Settings\HELP_DECRYPT.URL
  • %User Profile%\Local Settings\HELP_DECRYPT.PNG
  • %User Profile%\Templates\excel.xls.r7h
  • %User Profile%\Templates\excel4.xls.o3b
  • %User Profile%\Templates\powerpnt.ppt.9ck
  • %User Profile%\Templates\quattro.wb2.df4
  • %User Profile%\Templates\sndrec.wav.h8n
  • %User Profile%\Templates\winword.doc.1v7
  • %User Profile%\Templates\winword2.doc.6n8
  • %User Profile%\Templates\wordpfct.wpd.u5k
  • %User Profile%\Templates\HELP_DECRYPT.TXT
  • %User Profile%\Templates\HELP_DECRYPT.HTML
  • %User Profile%\Templates\HELP_DECRYPT.URL
  • %User Profile%\Templates\HELP_DECRYPT.PNG
  • %User Profile%\HELP_DECRYPT.TXT
  • %User Profile%\HELP_DECRYPT.HTML
  • %User Profile%\HELP_DECRYPT.URL
  • %User Profile%\HELP_DECRYPT.PNG
  • %User Profile%\Internet Explorer\brndlog.bak.xl0
  • %User Profile%\Internet Explorer\brndlog.txt.426
  • %User Profile%\Cookies\wilbert@atdmt[2].txt.7wg
  • %User Profile%\Cookies\wilbert@bing[2].txt.zu1
  • %User Profile%\Cookies\wilbert@c.atdmt[2].txt.3s7
  • %User Profile%\Cookies\wilbert@c.msn[2].txt.l6x
  • %User Profile%\Cookies\wilbert@doubleclick[1].txt.fv7
  • %User Profile%\Cookies\wilbert@microsoft[1].txt.5ew
  • %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.f41
  • %User Profile%\Cookies\wilbert@msn[2].txt.5nr
  • %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.7d2
  • %User Profile%\Cookies\wilbert@www.bing[2].txt.7d9
  • %User Profile%\Cookies\wilbert@www.msn[1].txt.4od
  • %User Profile%\Cookies\HELP_DECRYPT.TXT
  • %User Profile%\Cookies\HELP_DECRYPT.HTML
  • %User Profile%\Cookies\HELP_DECRYPT.URL
  • %User Profile%\Cookies\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD.o5u
  • %User Profile%\Templates\excel.xls.tx1
  • %User Profile%\Templates\excel4.xls.8gb
  • %User Profile%\Templates\powerpnt.ppt.ex4
  • %User Profile%\Templates\quattro.wb2.ic5
  • %User Profile%\Templates\sndrec.wav.9qs
  • %User Profile%\Templates\winword.doc.bd0
  • %User Profile%\Templates\winword2.doc.dk7
  • %User Profile%\Templates\wordpfct.wpd.q7t
  • %System Root%\Documents and Settings\HELP_DECRYPT.TXT
  • %System Root%\Documents and Settings\HELP_DECRYPT.HTML
  • %System Root%\Documents and Settings\HELP_DECRYPT.URL
  • %System Root%\Documents and Settings\HELP_DECRYPT.PNG
  • %System Root%\HELP_DECRYPT.TXT
  • %System Root%\HELP_DECRYPT.HTML
  • %System Root%\HELP_DECRYPT.URL
  • %System Root%\HELP_DECRYPT.PNG
  • %Desktop%\HELP_DECRYPT.TXT
  • %Desktop%\HELP_DECRYPT.HTML
  • %Desktop%\HELP_DECRYPT.URL
  • %Desktop%\HELP_DECRYPT.PNG
  • %User Startup%\HELP_DECRYPT.TXT
  • %User Startup%\HELP_DECRYPT.HTML
  • %User Startup%\HELP_DECRYPT.URL
  • %User Startup%\HELP_DECRYPT.PNG

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}r.es
  • http://{BLOCKED}sscod.com
  • {BLOCKED}5.164.184
  • {BLOCKED}10.229
  • {BLOCKED}1.66.0
  • {BLOCKED}121.1

It deletes itself after execution.

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.750

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

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ 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
    • 8D32DCFA032285C311440C90B364FD84
  • In HKEY_CURRENT_USER\software\8D32DCFA032285C311440C90B364FD84
    • 001134444689BCDF

Step 4

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\Run
    • 9d6aa9e = "%System Root%\9d6aa9e3\9d6aa9e3.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • 9d6aa9e3 = "%User Profile%\Application Data\9d6aa9e3.exe"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
    • 3k = "{random values}"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
    • 2u = "{random characters}"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
    • dr = "{random characters}"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84
    • cv = "{random characters}"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Internet Explorer\brndlog.bak = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Internet Explorer\brndlog.txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\excel.xls = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\excel4.xls = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\powerpnt.ppt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\quattro.wb2 = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\sndrec.wav = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\winword.doc = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\winword2.doc = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Templates\wordpfct.wpd = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@atdmt[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@bing[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@c.atdmt[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@c.msn[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@doubleclick[1].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@microsoft[1].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@msn[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@scorecardresearch[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@www.bing[2].txt = "68adfd"
  • In HKEY_CURRENT_USER\Software\8D32DCFA032285C311440C90B364FD84\001134444689BCDF
    • %User Profile%\Cookies\wilbert@www.msn[1].txt = "68adfd"

Step 5

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore
    • DisableSR = "1"

Step 6

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 Root%\9d6aa9e3\9d6aa9e3.exe
  • %User Profile%\Application Data\9d6aa9e3.exe
  • %User Startup%\9d6aa9e3.exe
  • A:\HELP_DECRYPT.TXT
  • A:\HELP_DECRYPT.HTML
  • A:\HELP_DECRYPT.URL
  • A:\HELP_DECRYPT.PNG
  • %User Profile%\Internet Explorer\brndlog.bak.957
  • %User Profile%\Internet Explorer\brndlog.txt.di0
  • %User Profile%\Internet Explorer\HELP_DECRYPT.TXT
  • %User Profile%\Internet Explorer\HELP_DECRYPT.HTML
  • %User Profile%\Internet Explorer\HELP_DECRYPT.URL
  • %User Profile%\Internet Explorer\HELP_DECRYPT.PNG
  • %User Profile%\Microsoft\HELP_DECRYPT.TXT
  • %User Profile%\Microsoft\HELP_DECRYPT.HTML
  • %User Profile%\Microsoft\HELP_DECRYPT.URL
  • %User Profile%\Microsoft\HELP_DECRYPT.PNG
  • %User Profile%\Application Data\HELP_DECRYPT.TXT
  • %User Profile%\Application Data\HELP_DECRYPT.HTML
  • %User Profile%\Application Data\HELP_DECRYPT.URL
  • %User Profile%\Application Data\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD.dv1
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\Windows Media\9.0\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\Windows Media\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\HELP_DECRYPT.TXT
  • %Application Data%\Microsoft\HELP_DECRYPT.HTML
  • %Application Data%\Microsoft\HELP_DECRYPT.URL
  • %Application Data%\Microsoft\HELP_DECRYPT.PNG
  • %Application Data%\HELP_DECRYPT.TXT
  • %Application Data%\HELP_DECRYPT.HTML
  • %Application Data%\HELP_DECRYPT.URL
  • %Application Data%\HELP_DECRYPT.PNG
  • %User Profile%\Local Settings\HELP_DECRYPT.TXT
  • %User Profile%\Local Settings\HELP_DECRYPT.HTML
  • %User Profile%\Local Settings\HELP_DECRYPT.URL
  • %User Profile%\Local Settings\HELP_DECRYPT.PNG
  • %User Profile%\Templates\excel.xls.r7h
  • %User Profile%\Templates\excel4.xls.o3b
  • %User Profile%\Templates\powerpnt.ppt.9ck
  • %User Profile%\Templates\quattro.wb2.df4
  • %User Profile%\Templates\sndrec.wav.h8n
  • %User Profile%\Templates\winword.doc.1v7
  • %User Profile%\Templates\winword2.doc.6n8
  • %User Profile%\Templates\wordpfct.wpd.u5k
  • %User Profile%\Templates\HELP_DECRYPT.TXT
  • %User Profile%\Templates\HELP_DECRYPT.HTML
  • %User Profile%\Templates\HELP_DECRYPT.URL
  • %User Profile%\Templates\HELP_DECRYPT.PNG
  • %User Profile%\HELP_DECRYPT.TXT
  • %User Profile%\HELP_DECRYPT.HTML
  • %User Profile%\HELP_DECRYPT.URL
  • %User Profile%\HELP_DECRYPT.PNG
  • %User Profile%\Internet Explorer\brndlog.bak.xl0
  • %User Profile%\Internet Explorer\brndlog.txt.426
  • %User Profile%\Cookies\wilbert@atdmt[2].txt.7wg
  • %User Profile%\Cookies\wilbert@bing[2].txt.zu1
  • %User Profile%\Cookies\wilbert@c.atdmt[2].txt.3s7
  • %User Profile%\Cookies\wilbert@c.msn[2].txt.l6x
  • %User Profile%\Cookies\wilbert@doubleclick[1].txt.fv7
  • %User Profile%\Cookies\wilbert@microsoft[1].txt.5ew
  • %User Profile%\Cookies\wilbert@msnportal.112.2o7[1].txt.f41
  • %User Profile%\Cookies\wilbert@msn[2].txt.5nr
  • %User Profile%\Cookies\wilbert@scorecardresearch[2].txt.7d2
  • %User Profile%\Cookies\wilbert@www.bing[2].txt.7d9
  • %User Profile%\Cookies\wilbert@www.msn[1].txt.4od
  • %User Profile%\Cookies\HELP_DECRYPT.TXT
  • %User Profile%\Cookies\HELP_DECRYPT.HTML
  • %User Profile%\Cookies\HELP_DECRYPT.URL
  • %User Profile%\Cookies\HELP_DECRYPT.PNG
  • %Application Data%\Microsoft\Windows Media\9.0\WMSDKNS.DTD.o5u
  • %User Profile%\Templates\excel.xls.tx1
  • %User Profile%\Templates\excel4.xls.8gb
  • %User Profile%\Templates\powerpnt.ppt.ex4
  • %User Profile%\Templates\quattro.wb2.ic5
  • %User Profile%\Templates\sndrec.wav.9qs
  • %User Profile%\Templates\winword.doc.bd0
  • %User Profile%\Templates\winword2.doc.dk7
  • %User Profile%\Templates\wordpfct.wpd.q7t
  • %System Root%\Documents and Settings\HELP_DECRYPT.TXT
  • %System Root%\Documents and Settings\HELP_DECRYPT.HTML
  • %System Root%\Documents and Settings\HELP_DECRYPT.URL
  • %System Root%\Documents and Settings\HELP_DECRYPT.PNG
  • %System Root%\HELP_DECRYPT.TXT
  • %System Root%\HELP_DECRYPT.HTML
  • %System Root%\HELP_DECRYPT.URL
  • %System Root%\HELP_DECRYPT.PNG
  • %Desktop%\HELP_DECRYPT.TXT
  • %Desktop%\HELP_DECRYPT.HTML
  • %Desktop%\HELP_DECRYPT.URL
  • %Desktop%\HELP_DECRYPT.PNG
  • %User Startup%\HELP_DECRYPT.TXT
  • %User Startup%\HELP_DECRYPT.HTML
  • %User Startup%\HELP_DECRYPT.URL
  • %User Startup%\HELP_DECRYPT.PNG

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_CRYPWALL.CBQ157N. 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 8

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.

  • %System Root%\9d6aa9e3


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