HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Kazy.63886 (B) (Emsisoft), Gen:Variant.Kazy.63886 (AdAware), Backdoor.Win32.Farfli.FD, Backdoor.Win32.Xtrat.FD, Trojan.Win32.IEDummy.FD, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)Behaviour: Trojan, Backdoor, Worm, WormAutorun
The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.
Summary
MD5: f37a323e68ae62575cdf2e9255ce45b6
SHA1: 68850add5f53716fd7b75aefd99429248fe94173
SHA256: 330eea4c6ec15469652320fa3a3285253adbbe064641e6f73e5ccf26c46bacdc
SSDeep: 6144:TYf4aX04HyLw5cfGiF/iUkHVgxb6dq8/BxjH0:sf4a3SLw5cOiRiUkHVg96k6xj
Size: 214016 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: pinstaller
Created at: 2014-04-24 00:38:45
Analyzed on: WindowsXP SP3 32-bit
Summary: Backdoor. Malware that enables a remote control of victim's machine.
Dynamic Analysis
Payload
Behaviour | Description |
---|---|
WormAutorun | A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Backdoor's file once a user opens a drive's folder in Windows Explorer. |
Process activity
The Backdoor creates the following process(es):
vbc.exe:1216
%original file name%.exe:1764
The Backdoor injects its code into the following process(es):
iexplore.exe:1436
svchost.exe:1860
File activity
The process vbc.exe:1216 makes changes in the file system.
The Backdoor deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)
The process iexplore.exe:1436 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%WinDir%\windows\aston.exe (7547 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\--((Mutex))--.dat (314 bytes)
Registry activity
The process vbc.exe:1216 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "BC 32 59 FA B1 56 02 89 0F 21 CC D2 F0 1E 5D 57"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\XtremeRAT]
"Mutex" = "--((Mutex))--"
The process %original file name%.exe:1764 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C0 0C 13 AF 95 ED B1 9D 55 BE 16 71 CF CA C2 D0"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
The process iexplore.exe:1436 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 01 00 00 00 00 00 00 00"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{P71PWCT0-BC4C-5NF6-RI6M-YVCK21X18G66}]
"StubPath" = "%WinDir%\windows\aston.exe restart"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"ID" = "1208111653"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
[HKCU\Software\--((Mutex))--]
"ServerStarted" = "02/05/2014 14:20:38"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"Name" = "iexplore.exe"
[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "83 00 13 AF 3B EB 73 3B 11 53 78 B1 3C E5 94 E3"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MigrateProxy" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKCU\Software\--((Mutex))--]
"ServerName" = "%WinDir%\windows\aston.exe"
The Backdoor modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"
To automatically run itself each time Windows is booted, the Backdoor adds the following link to its file to the system registry autorun key:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "%WinDir%\windows\aston.exe"
The Backdoor modifies IE settings for security zones to map all urls to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"IntranetName" = "1"
The Backdoor modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
"ProxyBypass" = "1"
To automatically run itself each time Windows is booted, the Backdoor adds the following link to its file to the system registry autorun key:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"HKCU" = "%WinDir%\windows\aston.exe"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
The Backdoor deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
Dropped PE files
MD5 | File path |
---|---|
67f5238229333c061092f5a32e8c2ee1 | c:\WINDOWS\windows\aston.exe |
HOSTS file anomalies
No changes have been detected.
Rootkit activity
No anomalies have been detected.
Propagation
A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Backdoor's file once a user opens a drive's folder in Windows Explorer.
Removals
Remove it with Ad-Aware
- Click (here) to download and install Ad-Aware Free Antivirus.
- Update the definition files.
- Run a full scan of your computer.
Manual removal*
- Terminate malicious process(es) (How to End a Process With the Task Manager):
vbc.exe:1216
%original file name%.exe:1764 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%WinDir%\windows\aston.exe (7547 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\--((Mutex))--.dat (314 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "%WinDir%\windows\aston.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"HKCU" = "%WinDir%\windows\aston.exe" - Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
- Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.
Static Analysis
VersionInfo
Company Name: Chrome
Product Name: Chrome
Product Version: 1.4.4.4
Legal Copyright: Chrome
Legal Trademarks: Chrome
Original Filename: Vinder.exe
Internal Name: Vinder.exe
File Version: 1.4.4.4
File Description: Chrome
Comments: Chrome
Language: English (United States)
Company Name: ChromeProduct Name: ChromeProduct Version: 1.4.4.4Legal Copyright: ChromeLegal Trademarks: ChromeOriginal Filename: Vinder.exeInternal Name: Vinder.exeFile Version: 1.4.4.4File Description: ChromeComments: ChromeLanguage: English (United States)
PE Sections
Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
---|---|---|---|---|---|
.text | 8192 | 181204 | 181248 | 4.00393 | ce25b01ab83e7152357526832f066994 |
.rsrc | 196608 | 31464 | 31744 | 2.33733 | 991a31c223d6ca6fabfb1cc624ffff3d |
.reloc | 229376 | 12 | 512 | 0.070639 | f8abc9a239f39511d8fa9affa5d5ae5c |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Network Activity
URLs
URL | IP |
---|---|
wll.no-ip.info | 41.109.188.90 |
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
Map
Strings from Dumps
svchost.exe_1860:
.text
.text
`.data
`.data
.rsrc
.rsrc
ADVAPI32.dll
ADVAPI32.dll
KERNEL32.dll
KERNEL32.dll
NTDLL.DLL
NTDLL.DLL
RPCRT4.dll
RPCRT4.dll
NETAPI32.dll
NETAPI32.dll
ole32.dll
ole32.dll
ntdll.dll
ntdll.dll
RegCloseKey
RegCloseKey
RegOpenKeyExW
RegOpenKeyExW
GetProcessHeap
GetProcessHeap
NtOpenKey
NtOpenKey
svchost.pdb
svchost.pdb
\PIPE\
\PIPE\
Software\Microsoft\Windows NT\CurrentVersion\Svchost
Software\Microsoft\Windows NT\CurrentVersion\Svchost
\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\
\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\
5.1.2600.5512 (xpsp.080413-2111)
5.1.2600.5512 (xpsp.080413-2111)
svchost.exe
svchost.exe
Windows
Windows
Operating System
Operating System
5.1.2600.5512
5.1.2600.5512
svchost.exe_1860_rwx_10000000_0004A000:
.idata
.idata
.rdata
.rdata
P.reloc
P.reloc
P.rsrc
P.rsrc
ServerKeyloggerU
ServerKeyloggerU
789:;<&'()* ,-./12345
789:;<&'()* ,-./12345
%SERVER%
%SERVER%
URLMON.DLL
URLMON.DLL
shell32.dll
shell32.dll
http://
http://
advapi32.dll
advapi32.dll
kernel32.dll
kernel32.dll
mpr.dll
mpr.dll
version.dll
version.dll
comctl32.dll
comctl32.dll
gdi32.dll
gdi32.dll
opengl32.dll
opengl32.dll
user32.dll
user32.dll
wintrust.dll
wintrust.dll
msimg32.dll
msimg32.dll
GetKeyboardType
GetKeyboardType
RegOpenKeyExA
RegOpenKeyExA
RegCloseKey
RegCloseKey
oleaut32.dll
oleaut32.dll
RegOpenKeyExW
RegOpenKeyExW
RegCreateKeyW
RegCreateKeyW
GetWindowsDirectoryW
GetWindowsDirectoryW
UnhookWindowsHookEx
UnhookWindowsHookEx
SetWindowsHookExW
SetWindowsHookExW
MapVirtualKeyW
MapVirtualKeyW
GetKeyboardLayout
GetKeyboardLayout
GetKeyState
GetKeyState
shlwapi.dll
shlwapi.dll
SHDeleteKeyW
SHDeleteKeyW
FindExecutableW
FindExecutableW
URLDownloadToCacheFileW
URLDownloadToCacheFileW
wininet.dll
wininet.dll
FtpPutFileW
FtpPutFileW
FtpSetCurrentDirectoryW
FtpSetCurrentDirectoryW
GetKeyboardState
GetKeyboardState
ShellExecuteW
ShellExecuteW
ntdll.dll
ntdll.dll
1 1$1(1,10141
1 1$1(1,10141
KWindows
KWindows
TServerKeylogger
TServerKeylogger
x.html
x.html
HKEY_CLASSES_ROOT
HKEY_CLASSES_ROOT
HKEY_CURRENT_USER
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_LOCAL_MACHINE
HKEY_USERS
HKEY_USERS
HKEY_CURRENT_CONFIG
HKEY_CURRENT_CONFIG
[Execute]
[Execute]
KeyDelBackspace
KeyDelBackspace
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
.html
.html
XtremeKeylogger
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
Software\Microsoft\Windows\CurrentVersion\Run
.functions
.functions
icon=shell32.dll,4
icon=shell32.dll,4
shellexecute=
shellexecute=
autorun.inf
autorun.inf
\Microsoft\Windows\
\Microsoft\Windows\
ÞFAULTBROWSER%
ÞFAULTBROWSER%
svchost.exe
svchost.exe
wll.no-ip.info
wll.no-ip.info
ftpuser
ftpuser
aston.exe
aston.exe
windows
windows
Portas
Portas
{P71PWCT0-BC4C-5NF6-RI6M-YVCK21X18G66}
{P71PWCT0-BC4C-5NF6-RI6M-YVCK21X18G66}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Atrans.dll
Atrans.dll
ftp.ftpserver.com
ftp.ftpserver.com
iexplore.exe_1436:
%?9-*09,*19}*09
%?9-*09,*19}*09
.text
.text
`.data
`.data
.rsrc
.rsrc
msvcrt.dll
msvcrt.dll
KERNEL32.dll
KERNEL32.dll
NTDLL.DLL
NTDLL.DLL
USER32.dll
USER32.dll
SHLWAPI.dll
SHLWAPI.dll
SHDOCVW.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
IE-X-X
rsabase.dll
rsabase.dll
System\CurrentControlSet\Control\Windows
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
dw15 -x -s %u
watson.microsoft.com
watson.microsoft.com
IEWatsonURL
IEWatsonURL
%s -h %u
%s -h %u
iedw.exe
iedw.exe
Iexplore.XPExceptionFilter
Iexplore.XPExceptionFilter
jscript.DLL
jscript.DLL
mshtml.dll
mshtml.dll
mlang.dll
mlang.dll
urlmon.dll
urlmon.dll
wininet.dll
wininet.dll
shdocvw.DLL
shdocvw.DLL
browseui.DLL
browseui.DLL
comctl32.DLL
comctl32.DLL
IEXPLORE.EXE
IEXPLORE.EXE
iexplore.pdb
iexplore.pdb
ADVAPI32.dll
ADVAPI32.dll
MsgWaitForMultipleObjects
MsgWaitForMultipleObjects
IExplorer.EXE
IExplorer.EXE
IIIIIB(II<.Fg
IIIIIB(II<.Fg
7?_____ZZSSH%
7?_____ZZSSH%
)z.UUUUUUUU
)z.UUUUUUUU
,....Qym
,....Qym
````2```
````2```
{.QLQIIIKGKGKGKGKGKG
{.QLQIIIKGKGKGKGKGKG
;33;33;0
;33;33;0
8888880
8888880
8887080
8887080
browseui.dll
browseui.dll
shdocvw.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
6.00.2900.5512 (xpsp.080413-2105)
Windows
Windows
Operating System
Operating System
6.00.2900.5512
6.00.2900.5512
iexplore.exe_1436_rwx_10000000_0004A000:
.idata
.idata
.rdata
.rdata
P.reloc
P.reloc
P.rsrc
P.rsrc
ServerKeyloggerU
ServerKeyloggerU
789:;<&'()* ,-./12345
789:;<&'()* ,-./12345
%SERVER%
%SERVER%
URLMON.DLL
URLMON.DLL
shell32.dll
shell32.dll
http://
http://
advapi32.dll
advapi32.dll
kernel32.dll
kernel32.dll
mpr.dll
mpr.dll
version.dll
version.dll
comctl32.dll
comctl32.dll
gdi32.dll
gdi32.dll
opengl32.dll
opengl32.dll
user32.dll
user32.dll
wintrust.dll
wintrust.dll
msimg32.dll
msimg32.dll
GetKeyboardType
GetKeyboardType
RegOpenKeyExA
RegOpenKeyExA
RegCloseKey
RegCloseKey
oleaut32.dll
oleaut32.dll
RegOpenKeyExW
RegOpenKeyExW
RegCreateKeyW
RegCreateKeyW
GetWindowsDirectoryW
GetWindowsDirectoryW
UnhookWindowsHookEx
UnhookWindowsHookEx
SetWindowsHookExW
SetWindowsHookExW
MapVirtualKeyW
MapVirtualKeyW
GetKeyboardLayout
GetKeyboardLayout
GetKeyState
GetKeyState
shlwapi.dll
shlwapi.dll
SHDeleteKeyW
SHDeleteKeyW
FindExecutableW
FindExecutableW
URLDownloadToCacheFileW
URLDownloadToCacheFileW
wininet.dll
wininet.dll
FtpPutFileW
FtpPutFileW
FtpSetCurrentDirectoryW
FtpSetCurrentDirectoryW
GetKeyboardState
GetKeyboardState
ShellExecuteW
ShellExecuteW
ntdll.dll
ntdll.dll
1 1$1(1,10141
1 1$1(1,10141
KWindows
KWindows
TServerKeylogger
TServerKeylogger
x.html
x.html
HKEY_CLASSES_ROOT
HKEY_CLASSES_ROOT
HKEY_CURRENT_USER
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_LOCAL_MACHINE
HKEY_USERS
HKEY_USERS
HKEY_CURRENT_CONFIG
HKEY_CURRENT_CONFIG
[Execute]
[Execute]
KeyDelBackspace
KeyDelBackspace
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
.html
.html
XtremeKeylogger
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
Software\Microsoft\Windows\CurrentVersion\Run
.functions
.functions
icon=shell32.dll,4
icon=shell32.dll,4
shellexecute=
shellexecute=
autorun.inf
autorun.inf
\Microsoft\Windows\
\Microsoft\Windows\
ÞFAULTBROWSER%
ÞFAULTBROWSER%
svchost.exe
svchost.exe
wll.no-ip.info
wll.no-ip.info
ftpuser
ftpuser
aston.exe
aston.exe
windows
windows
Portas
Portas
{P71PWCT0-BC4C-5NF6-RI6M-YVCK21X18G66}
{P71PWCT0-BC4C-5NF6-RI6M-YVCK21X18G66}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Atrans.dll
Atrans.dll
ftp.ftpserver.com
ftp.ftpserver.com
%WinDir%\Microsoft.NET\Framework\v2.0.50727\vbc.exe
%WinDir%\Microsoft.NET\Framework\v2.0.50727\vbc.exe
%Program Files%\Internet Explorer\iexplore.exe
%Program Files%\Internet Explorer\iexplore.exe