Backdoor.Win32.Farfli_e1368ba67c
Trojan.Win32.Xtrat.kax (Kaspersky), Gen:Variant.Zusy.78805 (B) (Emsisoft), Gen:Variant.Zusy.78805 (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.
| Requires JavaScript enabled! |
|---|
MD5: e1368ba67c2930f4ef5ddfe356d388ef
SHA1: d59d7209fa3a2068e697e2e75cd5a9ea9b2229d0
SHA256: ddbb07f967ad72d01854e9d44b6a4bc360bd14924d0519bdf905b9fd5996fe4a
SSDeep: 3072:BXVwIOjfm7AKoEtrXyL7Ax3L3wfdogxuwXn3143Mp3cKAArDZz4N9GhbkENEkl:T8jfU9BoW3edrpVtpxyN90vEc
Size: 262312 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2014-06-07 15:14:24
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):
mscorsvw.exe:172
%original file name%.exe:1992
The Backdoor injects its code into the following process(es):
%original file name%.exe:528
svchost.exe:320
Mutexes
The following mutexes were created/opened:
ZonesCounterMutex
ZonesCacheCounterMutex
ZonesLockedCacheCounterMutex
ShimCacheMutex
DDrawWindowListMutex
DDrawDriverObjectListMutex
__DDrawExclMode__
__DDrawCheckExclMode__
df8Ha1Fc
_!MSFTHISTORY!_
c:!documents and settings!adm!local settings!temporary internet files!content.ie5!
c:!documents and settings!adm!cookies!
c:!documents and settings!adm!local settings!history!history.ie5!
WininetStartupMutex
WininetConnectionMutex
WininetProxyRegistryMutex
RasPbFile
File activity
The process %original file name%.exe:528 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):
%WinDir%\InstallDir\dir.exe (1425 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\WKESR3E8\desktop.ini (67 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\df8Ha1Fc.dat (322 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\G8TA3EFJ\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ZLA21Y1W\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\S76GYX0P\desktop.ini (67 bytes)
Registry activity
The process mscorsvw.exe:172 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\.NETFramework\v2.0.50727\NGenService\State]
"AccumulatedWaitIdleTime" = "1260000"
The process %original file name%.exe:1992 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "95 D8 0A 97 E1 72 72 4C 58 4E 8F 41 FB FE 6D 47"
The process %original file name%.exe:528 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"
[HKCU\Software\df8Ha1Fc]
"ServerStarted" = "25/06/2014 17:36:09"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 13 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" = "df8Ha1Fc"
[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" = "1402143264"
[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\df8Ha1Fc]
"ServerName" = "%WinDir%\InstallDir\dir.exe"
[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" = "%original file name%.exe"
[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{458E23JG-75K6-87U7-0VLJ-3SS48AYH32D5}]
"StubPath" = "%WinDir%\InstallDir\dir.exe restart"
[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\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"
[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E3 5A 82 A7 CA 21 59 B3 96 45 11 D5 C2 48 2A 7D"
[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"
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:
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"HKCU" = "%WinDir%\InstallDir\dir.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "%WinDir%\InstallDir\dir.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"
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
There are no dropped PE files.
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 | 8192 | 177796 | 178176 | 5.52021 | 1069873fef2830946299da3f632dc8ec |
| .rsrc | 188416 | 82644 | 82944 | 5.17555 | 7df19cfce0fe546b27c2a127a79f47dc |
| .reloc | 278528 | 12 | 512 | 0.070639 | 2b0d57303ee8d1f7d9dff1655bf86f6e |
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):
.idata
.rdata
P.reloc
P.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
GetKeyboardType
RegOpenKeyExA
RegCloseKey
oleaut32.dll
RegOpenKeyExW
RegCreateKeyW
GetWindowsDirectoryW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
shlwapi.dll
SHDeleteKeyW
FindExecutableW
URLDownloadToCacheFileW
wininet.dll
FtpPutFileW
FtpSetCurrentDirectoryW
GetKeyboardState
ShellExecuteW
ntdll.dll
1 1$1(1,10141
KWindows
TServerKeylogger
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
AQO.PUBLICVM.COM
dir.exe
hkcmd.exe
{458E23JG-75K6-87U7-0VLJ-3SS48AYH32D5}HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp.ftpserver.com
C:\Windows\System32\drprov.
ftpuser
c:\%original file name%.exe
%original file name%.exe_528_rwx_10000000_0004A000:
.idata
.rdata
P.reloc
P.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
GetKeyboardType
RegOpenKeyExA
RegCloseKey
oleaut32.dll
RegOpenKeyExW
RegCreateKeyW
GetWindowsDirectoryW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
shlwapi.dll
SHDeleteKeyW
FindExecutableW
URLDownloadToCacheFileW
wininet.dll
FtpPutFileW
FtpSetCurrentDirectoryW
GetKeyboardState
ShellExecuteW
ntdll.dll
1 1$1(1,10141
KWindows
TServerKeylogger
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
AQO.PUBLICVM.COM
dir.exe
hkcmd.exe
{458E23JG-75K6-87U7-0VLJ-3SS48AYH32D5}HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp.ftpserver.com
C:\Windows\System32\drprov.
ftpuser
c:\%original file name%.exe
svchost.exe_320:
.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_320_rwx_10000000_0004A000:
.idata
.rdata
P.reloc
P.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
GetKeyboardType
RegOpenKeyExA
RegCloseKey
oleaut32.dll
RegOpenKeyExW
RegCreateKeyW
GetWindowsDirectoryW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
shlwapi.dll
SHDeleteKeyW
FindExecutableW
URLDownloadToCacheFileW
wininet.dll
FtpPutFileW
FtpSetCurrentDirectoryW
GetKeyboardState
ShellExecuteW
ntdll.dll
1 1$1(1,10141
KWindows
TServerKeylogger
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
AQO.PUBLICVM.COM
dir.exe
hkcmd.exe
{458E23JG-75K6-87U7-0VLJ-3SS48AYH32D5}HKCU\Software\Microsoft\Windows\CurrentVersion\Run
ftp.ftpserver.com
C:\Windows\System32\drprov.
ftpuser
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):
mscorsvw.exe:172
%original file name%.exe:1992 - Delete the original Backdoor file.
- Delete or disinfect the following files created/modified by the Backdoor:
%WinDir%\InstallDir\dir.exe (1425 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\WKESR3E8\desktop.ini (67 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\df8Ha1Fc.dat (322 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\G8TA3EFJ\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\ZLA21Y1W\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\S76GYX0P\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]
"HKCU" = "%WinDir%\InstallDir\dir.exe"
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "%WinDir%\InstallDir\dir.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.
