Backdoor.Win32.Farfli_9c5e180e28

by malwarelabrobot on May 2nd, 2016 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.MSIL.MalPack (A) (Emsisoft), 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.

Requires JavaScript enabled!

Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 9c5e180e286a61425bf6cec54f2b2fa7
SHA1: d34327b986003cfd4cf1735265b193ade3f71ebe
SHA256: 9e3e39e03f28fe1a00879fe70c0c7d4726d9fdb96358422d7c7544ccca577c58
SSDeep: 6144:GuSET5NIcOmgFUDCIo/U2tEQRJF3it//cn8C0jB:Dz7I/mO/XVJhy/JjjB
Size: 298496 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2016-04-11 03:59:01
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:928
%original file name%.exe:1924

The Backdoor injects its code into the following process(es):

svchost.exe:632
iexplore.exe:524

Mutexes

The following mutexes were created/opened:
No objects were found.

File activity

The process %original file name%.exe:928 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe (1425 bytes)
%WinDir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new (724 bytes)
%WinDir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new (724 bytes)

The process %original file name%.exe:1924 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)

Registry activity

The process %original file name%.exe:928 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C9 B8 2E E4 9F A2 0C E9 93 92 63 D0 04 27 83 37"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Program Files%\Internet Explorer]
"iexplore.exe" = "Internet Explorer"

[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"

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]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

The process %original file name%.exe:1924 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D5 C3 22 58 62 D3 34 E8 2C 97 DC 79 CA CE 6A 90"

[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))--"

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

Company Name:
Product Name:
Product Version: 0.0.0.0
Legal Copyright:
Legal Trademarks:
Original Filename: aoecoqky.exe
Internal Name: aoecoqky.exe
File Version: 0.0.0.0
File Description:
Comments:
Language: Language Neutral

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 8192 241076 241152 4.39876 9665a8c60bb1ff09ff190c204a747955
.rsrc 253952 4096 4096 0.473678 bb2536bec23f7c15473b0100a2a18b7c
.reloc 262144 12 512 0.070639 9719eec4a6d0ac3e49ce2364356cdb48
fKqUVpYF 270336 51368 51712 5.32227 b4a39ea186c2076d440c69380ce39783

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://www.google.com/ 173.194.113.211
hxxp://www.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA 173.194.113.207
taherbadboy73.ddns.net 41.107.70.89
ssl.gstatic.com 216.58.214.227
clients1.google.com.ua 216.58.209.195


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET / HTTP/1.1
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C)
Host: VVV.google.com
Connection: Keep-Alive


HTTP/1.1 302 Found
Cache-Control: private
Content-Type: text/html; charset=UTF-8
Location: hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA
Content-Length: 259
Date: Sun, 01 May 2016 19:49:40 GMT
<HTML><HEAD><meta http-equiv="content-type" content="te
xt/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HE
AD><BODY>.<H1>302 Moved</H1>.The document has mov
ed.<A HREF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJ
YM_zhVA">here</A>...</BODY></HTML>..HTTP/1.1 302 
Found..Cache-Control: private..Content-Type: text/html; charset=UTF-8.
.Location: hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA.
.Content-Length: 259..Date: Sun, 01 May 2016 19:49:40 GMT..<HTML>
;<HEAD><meta http-equiv="content-type" content="text/html;cha
rset=utf-8">.<TITLE>302 Moved</TITLE></HEAD><B
ODY>.<H1>302 Moved</H1>.The document has moved.<A HR
EF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA">
;here</A>...</BODY></HTML>....



GET /?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA HTTP/1.1
Accept: */*
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C)
Host: VVV.google.com.ua
Connection: Keep-Alive


HTTP/1.1 302 Found
Location: hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoPJYM_zhVA&gws_rd=ssl
Cache-Control: private
Content-Type: text/html; charset=UTF-8
P3P: CP="This is not a P3P policy! See hXXps://VVV.google.com/support/accounts/answer/151657?hl=en for more info."
Date: Sun, 01 May 2016 19:49:40 GMT
Server: gws
Content-Length: 275
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Set-Cookie: NID=79=dzqB4nOjEGG6zCUQRV0LlU43wMjPfStSWqNzfIXfvw05pmVpkLGxeegmsn76RyIpDTQMcgPQwl_gJxSJDKvvmttYbYUOEMkUSGenk4f_6GHJf9bQ_TX2A2BNxSewAzEZ; expires=Mon, 31-Oct-2016 19:49:40 GMT; path=/; domain=.google.com.ua; HttpOnly
<HTML><HEAD><meta http-equiv="content-type" content="te
xt/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HE
AD><BODY>.<H1>302 Moved</H1>.The document has mov
ed.<A HREF="hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=1F0mV7WRCoP
JYM_zhVA&gws_rd=ssl">here</A>...</BODY></HTML>
;..HTTP/1.1 302 Found..Location: hXXps://VVV.google.com.ua/?gfe_rd=cr&
ei=1F0mV7WRCoPJYM_zhVA&gws_rd=ssl..Cache-Control: private..Content-Typ
e: text/html; charset=UTF-8..P3P: CP="This is not a P3P policy! See ht
tps://VVV.google.com/support/accounts/answer/151657?hl=en for more inf
o."..Date: Sun, 01 May 2016 19:49:40 GMT..Server: gws..Content-Length:
 275..X-XSS-Protection: 1; mode=block..X-Frame-Options: SAMEORIGIN..Se
t-Cookie: NID=79=dzqB4nOjEGG6zCUQRV0LlU43wMjPfStSWqNzfIXfvw05pmVpkLGxe
egmsn76RyIpDTQMcgPQwl_gJxSJDKvvmttYbYUOEMkUSGenk4f_6GHJf9bQ_TX2A2BNxSe
wAzEZ; expires=Mon, 31-Oct-2016 19:49:40 GMT; path=/; domain=.google.c
om.ua; HttpOnly..<HTML><HEAD><meta http-equiv="content-
type" content="text/html;charset=utf-8">.<TITLE>302 Moved<
/TITLE></HEAD><BODY>.<H1>302 Moved</H1>.The
 document has moved.<A HREF="hXXps://VVV.google.com.ua/?gfe_rd=cr&a
mp;ei=1F0mV7WRCoPJYM_zhVA&gws_rd=ssl">here</A>...</BOD
Y></HTML>....
<<< skipped >>>

The Backdoor connects to the servers at the folowing location(s):

iexplore.exe_956:

%?9-*09,*19}*09
.text
`.data
.rsrc
msvcrt.dll
KERNEL32.dll
NTDLL.DLL
USER32.dll
SHLWAPI.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
rsabase.dll
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
watson.microsoft.com
IEWatsonURL
%s -h %u
iedw.exe
Iexplore.XPExceptionFilter
jscript.DLL
mshtml.dll
mlang.dll
urlmon.dll
wininet.dll
shdocvw.DLL
browseui.DLL
comctl32.DLL
IEXPLORE.EXE
iexplore.pdb
ADVAPI32.dll
MsgWaitForMultipleObjects
IExplorer.EXE
IIIIIB(II<.Fg
7?_____ZZSSH%
)z.UUUUUUUU
,....Qym
````2```
{.QLQIIIKGKGKGKGKGKG
;33;33;0
8888880
8887080
browseui.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
Windows
Operating System
6.00.2900.5512

svchost.exe_632:

.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_632_rwx_10000000_0004D000:

`.rsrc
ServerKeyloggerU
789:;<&'()* ,-./12345
%SERVER%
URLMON.DLL
shell32.dll
hXXp://
advapi32.dll
kernel32.dll
mpr.dll
version.dll
comctl32.dll
gdi32.dll
opengl32.dll
user32.dll
wintrust.dll
msimg32.dll
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExA
RegCloseKey
RegOpenKeyExW
RegCreateKeyW
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLD!
x).dcqR;G
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
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
.html
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
.functions
icon=shell32.dll,4
shellexecute=
autorun.inf
\Microsoft\Windows
\Microsoft\Windows\
ÞFAULTBROWSER%
svchost.exe
taherbadboy73.ddns.net
Server.exe
Port
BAD{5460C4DF-B266-909E-CB58-E32B79832EB2}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Porta
Pin%SERVER%
2.8.1
PTF.ftpserver.com
C:\Prog
ftpuser

iexplore.exe_524:

%?9-*09,*19}*09
.text
`.data
.rsrc
msvcrt.dll
KERNEL32.dll
NTDLL.DLL
USER32.dll
SHLWAPI.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
rsabase.dll
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
watson.microsoft.com
IEWatsonURL
%s -h %u
iedw.exe
Iexplore.XPExceptionFilter
jscript.DLL
mshtml.dll
mlang.dll
urlmon.dll
wininet.dll
shdocvw.DLL
browseui.DLL
comctl32.DLL
IEXPLORE.EXE
iexplore.pdb
ADVAPI32.dll
MsgWaitForMultipleObjects
IExplorer.EXE
IIIIIB(II<.Fg
7?_____ZZSSH%
)z.UUUUUUUU
,....Qym
````2```
{.QLQIIIKGKGKGKGKGKG
;33;33;0
8888880
8887080
browseui.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
Windows
Operating System
6.00.2900.5512

iexplore.exe_524_rwx_10000000_0004D000:

`.rsrc
ServerKeyloggerU
789:;<&'()* ,-./12345
%SERVER%
URLMON.DLL
shell32.dll
hXXp://
advapi32.dll
kernel32.dll
mpr.dll
version.dll
comctl32.dll
gdi32.dll
opengl32.dll
user32.dll
wintrust.dll
msimg32.dll
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExA
RegCloseKey
RegOpenKeyExW
RegCreateKeyW
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLD!
x).dcqR;G
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
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
.html
XtremeKeylogger
Software\Microsoft\Windows\CurrentVersion\Run
.functions
icon=shell32.dll,4
shellexecute=
autorun.inf
\Microsoft\Windows
\Microsoft\Windows\
ÞFAULTBROWSER%
svchost.exe
taherbadboy73.ddns.net
Server.exe
Port
BAD{5460C4DF-B266-909E-CB58-E32B79832EB2}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Porta
Pin%SERVER%
2.8.1
PTF.ftpserver.com
C:\Prog
ftpuser
c:\%original file name%.exe
%Program Files%\Internet Explorer\iexplore.exe


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate malicious process(es) (How to End a Process With the Task Manager):

    %original file name%.exe:928
    %original file name%.exe:1924

  2. Delete the original Backdoor file.
  3. Delete or disinfect the following files created/modified by the Backdoor:

    %Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe (1425 bytes)
    %WinDir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new (724 bytes)
    %WinDir%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new (724 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    "18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

  5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  6. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
  7. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

No votes yet


Lavasoft is the maker of Ad-Aware, the world's most popular anti-malware software with over 450 million downloads.
© 2026 Lavasoft. All rights reserved.
Terms Of Use |   Privacy Policy


x

Our best antivirus yet!

Fresh new look. Faster scanning. Better protection.

Enjoy unique new features, lightning fast scans and a simple yet beautiful new look in our best antivirus yet!

For a quicker, lighter and more secure experience, download the all new adaware antivirus 12 now!

Download adaware antivirus 12
No thanks, continue to lavasoft.com
close x

Discover the new adaware antivirus 12

Our best antivirus yet

Download Now