Trojan.Win32.Reconyc.brsi (Kaspersky), Trojan.Generic.11304439 (AdAware), Backdoor.Win32.Xtrat.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: 0c892510fa6089b8968eedc2d4901d64
SHA1: 0c80eb98e42e03f32ee8842ca9c3b94fab34a21b
SHA256: dfeb291923ac827cf3ab395596b5e1456270a6f0b38c0ea6a93c2d5c1a75503d
SSDeep: 12288:YOZKQj7O80xsxNImGh7odwEWO8P8C33qhF:j0UcKeVo
Size: 550400 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2014-05-03 15:24:55
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:2020
%original file name%.exe:2024
The Backdoor injects its code into the following process(es):
notepad.exe:436
Mutexes
The following mutexes were created/opened:No objects were found.
File activity
The process notepad.exe:436 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\InstallDir\updater.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Zow47bTpx.dat (322 bytes)
Registry activity
The process vbc.exe:2020 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7A 4E 9B 95 35 3E D8 6C 09 D4 79 2E 5C 38 44 D3"
[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" = "Zow47bTpx"
The process %original file name%.exe:2024 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1A F0 D1 B6 DB 5E 16 F2 FB 29 F8 FF AD DB 3C E0"
[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 notepad.exe:436 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 17 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"
[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" = "1208111751"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"
[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" = "notepad.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\Active Setup\Installed Components\{8Q5SI75H-5L0W-2LSN-I048-17Y15Q411653}]
"StubPath" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\InstallDir\updater.exe restart"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "50 39 5F 21 F2 94 5C 06 D9 1C 5B 17 75 61 CE D2"
[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\Zow47bTpx]
"ServerStarted" = "22/06/2014 22:04:20"
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" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\InstallDir\updater.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" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\InstallDir\updater.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:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\InstallDir\updater.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:2020
%original file name%.exe:2024 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%Documents and Settings%\%current user%\Local Settings\Temp\InstallDir\updater.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\Zow47bTpx.dat (322 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\InstallDir\updater.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"HKCU" = "C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\InstallDir\updater.exe" - 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:
Product Name:
Product Version: 0.0.0.0
Legal Copyright:
Legal Trademarks:
Original Filename: Chrome.exe
Internal Name: Chrome.exe
File Version: 0.0.0.0
File Description:
Comments:
Language: English (United States)
Company Name: Product Name: Product Version: 0.0.0.0Legal Copyright: Legal Trademarks: Original Filename: Chrome.exeInternal Name: Chrome.exeFile Version: 0.0.0.0File Description: Comments: Language: English (United States)
PE Sections
Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
---|---|---|---|---|---|
.text | 8192 | 548068 | 548352 | 2.95049 | 63273867f9ccd553d0918a6308be6fae |
.rsrc | 557056 | 672 | 1024 | 1.48043 | 05708c48d5ea0f6b2b485acf35364f95 |
.reloc | 565248 | 12 | 512 | 0.070639 | c4891fef7e383c84449af82460469fc3 |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
Network Activity
URLs
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
Map
The Backdoor connects to the servers at the folowing location(s):
Strings from Dumps
notepad.exe_436:
.text
.text
`.data
`.data
.rsrc
.rsrc
comdlg32.dll
comdlg32.dll
SHELL32.dll
SHELL32.dll
WINSPOOL.DRV
WINSPOOL.DRV
COMCTL32.dll
COMCTL32.dll
msvcrt.dll
msvcrt.dll
ADVAPI32.dll
ADVAPI32.dll
KERNEL32.dll
KERNEL32.dll
NTDLL.DLL
NTDLL.DLL
GDI32.dll
GDI32.dll
USER32.dll
USER32.dll
notepad.chm
notepad.chm
hhctrl.ocx
hhctrl.ocx
CLSID\{ADB880A6-D8FF-11CF-9377-00AA003B7A11}\InprocServer32
CLSID\{ADB880A6-D8FF-11CF-9377-00AA003B7A11}\InprocServer32
notepad.pdb
notepad.pdb
t%SSh
t%SSh
_acmdln
_acmdln
RegCloseKey
RegCloseKey
RegCreateKeyW
RegCreateKeyW
RegOpenKeyExA
RegOpenKeyExA
SetViewportExtEx
SetViewportExtEx
GetKeyboardLayout
GetKeyboardLayout
name="Microsoft.Windows.Shell.notepad"
name="Microsoft.Windows.Shell.notepad"
version="5.1.0.0"
version="5.1.0.0"
<description>Windows Shell</description>
<description>Windows Shell</description>
name="Microsoft.Windows.Common-Controls"
name="Microsoft.Windows.Common-Controls"
version="6.0.0.0"
version="6.0.0.0"
publicKeyToken="6595b64144ccf1df"
publicKeyToken="6595b64144ccf1df"
&*$#$$#$*
&*$#$$#$*
MMMrMMM`MMMRMMMFMMM:MMM.MMM"MMM
MMMrMMM`MMMRMMMFMMM:MMM.MMM"MMM
*.txt
*.txt
/.SETUP
/.SETUP
5.1.2600.5512 (xpsp.080413-2105)
5.1.2600.5512 (xpsp.080413-2105)
NOTEPAD.EXE
NOTEPAD.EXE
Windows
Windows
Operating System
Operating System
5.1.2600.5512
5.1.2600.5512
notepad.hlp
notepad.hlp
Text Documents (*.txt)
Text Documents (*.txt)
You cannot quit Windows because the Save As dialog
You cannot quit Windows because the Save As dialog
dialog box, and then try quitting Windows again.
dialog box, and then try quitting Windows again.
Common Dialog error (0xx)
Common Dialog error (0xx)
Not enough memory available to complete this operation. Quit one or more applications to increase available memory, and then try again.KThe %% file is too large for Notepad.
Not enough memory available to complete this operation. Quit one or more applications to increase available memory, and then try again.KThe %% file is too large for Notepad.
Not a valid file name.MCannot create the %% file.
Not a valid file name.MCannot create the %% file.
Make sure that the path and filename are correct.RCannot carry out the Word Wrap command because there is too much text in the file.
Make sure that the path and filename are correct.RCannot carry out the Word Wrap command because there is too much text in the file.
Page %d
Page %d
Ln %d, Col %d
Ln %d, Col %d
notepad.exe_436_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
mesk92.no-ip.biz
mesk92.no-ip.biz
updater.exe
updater.exe
notepad.exe
notepad.exe
LEAUT32.dll
LEAUT32.dll
{8Q5SI75H-5L0W-2LSN-I048-17Y15Q411653}
{8Q5SI75H-5L0W-2LSN-I048-17Y15Q411653}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
%windows%
%windows%
ftp.ftpserver.com
ftp.ftpserver.com
ftpuser
ftpuser
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe