Backdoor.Win32.Farfli_5ab7472e21
Trojan.Win32.VB.cjnn (Kaspersky), Gen:Trojan.Heur.fm3@sK!1j4di (AdAware), Backdoor.Win32.Farfli.FD, 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.
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MD5: 5ab7472e21001923ec704c2036da6e30
SHA1: c6c5196cf6cca3f4eea213e80c9b2d9a758c2228
SHA256: 5633979cde64f17a66d8c3ee016a8e9345a6ddc05ffd81f9c5770fb99ce5b2d6
SSDeep: 6144:hPRuC9OooOZ29DmUKBj79LsJGlh0zxXXAAOpC:hPRu3bOUEBP9LsJI0zFAtC
Size: 213444 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2010-12-17 18:14:19
Analyzed on: WindowsXP SP3 32-bit
Summary:
Backdoor. Malware that enables a remote control of victim's machine.
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):
%original file name%.exe:2356
WindowsMonitor.exe:556
The Backdoor injects its code into the following process(es):
WindowsMonitor.exe:3560
svchost.exe:3348
File activity
The process %original file name%.exe:2356 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe (601 bytes)
The Backdoor deletes the following file(s):
%Program Files%\WindowsMonitorConfig\__tmp_rar_sfx_access_check_928500 (0 bytes)
The process WindowsMonitor.exe:3560 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\44f874e8t78r7t8r7e8454h564gh564gf86h48gf.dat (314 bytes)
%System%\ConfigSystem\WindowsMonitor.exe (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
The Backdoor deletes the following file(s):
%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)
Registry activity
The process %original file name%.exe:2356 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5B 15 76 B3 47 FF 4A 8C C4 30 22 2F F3 91 43 D8"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Desktop" = "%Documents and Settings%\%current user%\Desktop"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Program Files%\WindowsMonitorConfig]
"WindowsMonitor.exe" = "WindowsMonitor"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"
[HKCU\Software\WinRAR SFX]
"C%%Program Files%WindowsMonitorConfig" = "%Program Files%\WindowsMonitorConfig"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
"Personal" = "%Documents and Settings%\%current user%\My Documents"
The Backdoor modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"
The Backdoor modifies IE settings for security zones to map all urls to the Intranet Zone:
"IntranetName" = "1"
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:
"UNCAsIntranet" = "1"
The process WindowsMonitor.exe:3560 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\sdgfg4984r8997ey87t98y79789684sdgsgfpoiqpoioriertretrektokknn]
"StubPath" = "%System%\ConfigSystem\WindowsMonitor.exe restart"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "46 00 00 00 41 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\XtremeRAT]
"Mutex" = "44f874e8t78r7t8r7e8454h564gh564gf86h48gf"
[HKCU\Software\44f874e8t78r7t8r7e8454h564gh564gf86h48gf]
"ServerName" = "%System%\ConfigSystem\WindowsMonitor.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
[HKLM\SOFTWARE\Microsoft\DirectDraw\MostRecentApplication]
"ID" = "1400271546"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common AppData" = "%Documents and Settings%\All Users\Application Data"
[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" = "WindowsMonitor.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\44f874e8t78r7t8r7e8454h564gh564gf86h48gf]
"LastSize" = "0"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D1 FF 2A 68 D9 1D 4C F9 1E 45 09 EF 72 A4 AD 24"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"
[HKCU\Software\44f874e8t78r7t8r7e8454h564gh564gf86h48gf]
"ServerStarted" = "01/06/2014 01:56:22"
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"
Proxy settings are disabled:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"
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"
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]
"WindowsMonitor.exe" = "%System%\ConfigSystem\WindowsMonitor.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"WindowsMonitor.exe" = "%System%\ConfigSystem\WindowsMonitor.exe"
The Backdoor modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "1"
The Backdoor deletes the following value(s) in system registry:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"
The process WindowsMonitor.exe:556 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "25 58 60 1B DB 39 E4 8F 4E A3 37 CA BD 5F B8 E2"
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]
"Windows Monitor" = "%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe"
Dropped PE files
| MD5 | File path |
|---|---|
| f28aa886444e212469165e88698069d3 | c:\Program Files\WindowsMonitorConfig\WindowsMonitor.exe |
| f28aa886444e212469165e88698069d3 | c:\WINDOWS\system32\ConfigSystem\WindowsMonitor.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.
VersionInfo
No information is available.
PE Sections
| Name | Virtual Address | Virtual Size | Raw Size | Entropy | Section MD5 |
|---|---|---|---|---|---|
| .text | 4096 | 51553 | 51712 | 4.52918 | 6e1bc625cba081cd77d936dde461f0fe |
| .rdata | 57344 | 7029 | 7168 | 3.44765 | 1f979c8b2c924276d339a2610fc742b5 |
| .data | 65536 | 121304 | 512 | 0.89898 | 2e0a815532c7fa1bc90cc6f513ae2b95 |
| .CRT | 188416 | 16 | 512 | 0.147711 | f020b6536e0e65bd519bc2f3f112cd03 |
| .rsrc | 192512 | 104828 | 104960 | 5.21191 | d2fab1e363aab9181bcaffca5c9d0459 |
Dropped from:
Downloaded by:
Similar by SSDeep:
Similar by Lavasoft Polymorphic Checker:
URLs
No activity has been detected.
IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)
Traffic
Web Traffic was not found.
The Backdoor connects to the servers at the folowing location(s):
`.rsrc
ServerKeyloggerU
789:;<&'()* ,-./12345
%SERVER%
URLMON.DLL
shell32.dll
http://
advapi32.dll
kernel32.dll
mpr.dll
version.dll
comctl32.dll
gdi32.dll
opengl32.dll
user32.dll
wintrust.dll
msimg32.dll
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLDb&}
KERNEL32.DLL
ntdll.dll
oleaut32.dll
shlwapi.dll
wininet.dll
x.html
HKEY_CLASSES_ROOT
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_USERS
HKEY_CURRENT_CONFIG
[Execute]
KeyDelBackspace
.html
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
.functions
icon=shell32.dll,4
shellexecute=
autorun.inf
\Microsoft\Windows\
ÞFAULTBROWSER%
svchost.exe
77777772.no-ip.org
d77777772.no-ip.org
WindowsMonitor.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp://imagens.esy.es
%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe
WindowsMonitor.exe_3560_rwx_10000000_0004D000:
`.rsrc
ServerKeyloggerU
789:;<&'()* ,-./12345
%SERVER%
URLMON.DLL
shell32.dll
http://
advapi32.dll
kernel32.dll
mpr.dll
version.dll
comctl32.dll
gdi32.dll
opengl32.dll
user32.dll
wintrust.dll
msimg32.dll
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLDb&}
KERNEL32.DLL
ntdll.dll
oleaut32.dll
shlwapi.dll
wininet.dll
x.html
HKEY_CLASSES_ROOT
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_USERS
HKEY_CURRENT_CONFIG
[Execute]
KeyDelBackspace
.html
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
.functions
icon=shell32.dll,4
shellexecute=
autorun.inf
\Microsoft\Windows\
ÞFAULTBROWSER%
svchost.exe
77777772.no-ip.org
d77777772.no-ip.org
WindowsMonitor.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp://imagens.esy.es
%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe
svchost.exe_3348:
.text
`.data
.rsrc
ADVAPI32.dll
KERNEL32.dll
NTDLL.DLL
RPCRT4.dll
NETAPI32.dll
ole32.dll
ntdll.dll
RegCloseKey
RegOpenKeyExW
GetProcessHeap
NtOpenKey
svchost.pdb
\PIPE\
Software\Microsoft\Windows NT\CurrentVersion\Svchost
\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\
5.1.2600.5512 (xpsp.080413-2111)
svchost.exe
Windows
Operating System
5.1.2600.5512
svchost.exe_3348_rwx_10000000_0004D000:
`.rsrc
ServerKeyloggerU
789:;<&'()* ,-./12345
%SERVER%
URLMON.DLL
shell32.dll
http://
advapi32.dll
kernel32.dll
mpr.dll
version.dll
comctl32.dll
gdi32.dll
opengl32.dll
user32.dll
wintrust.dll
msimg32.dll
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLDb&}
KERNEL32.DLL
ntdll.dll
oleaut32.dll
shlwapi.dll
wininet.dll
x.html
HKEY_CLASSES_ROOT
HKEY_CURRENT_USER
HKEY_LOCAL_MACHINE
HKEY_USERS
HKEY_CURRENT_CONFIG
[Execute]
KeyDelBackspace
.html
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
.functions
icon=shell32.dll,4
shellexecute=
autorun.inf
\Microsoft\Windows\
ÞFAULTBROWSER%
svchost.exe
77777772.no-ip.org
d77777772.no-ip.org
WindowsMonitor.exe
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp://imagens.esy.es
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):
%original file name%.exe:2356
WindowsMonitor.exe:556 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe (601 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Windows\44f874e8t78r7t8r7e8454h564gh564gf86h48gf.dat (314 bytes)
%System%\ConfigSystem\WindowsMonitor.exe (601 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes) - Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"WindowsMonitor.exe" = "%System%\ConfigSystem\WindowsMonitor.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"WindowsMonitor.exe" = "%System%\ConfigSystem\WindowsMonitor.exe"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Windows Monitor" = "%Program Files%\WindowsMonitorConfig\WindowsMonitor.exe" - Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
- Reboot the computer.
*Manual removal may cause unexpected system behaviour and should be performed at your own risk.
