MD5: 06812ba491e5ef56ffd8415f2fbbb688
SHA1: e04a3f8d387239c72cada3599696a9df45380860
SHA256: 4fa10286dcf2b574463339c94d43c8110d649a84e16c012a25faa1d95ceeeb44
SSDeep: 768:9MuijtHf5g7/IIG3bGcYDBSvFIWuePQtv66lZtzEWBp/mEU8kT:WNW71rcYDAWeotvXlfgWB9fU
Size: 33792 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 1992-06-20 01:22:17
Analyzed on: WindowsXP SP3 32-bit

Summary:

Backdoor. Malware that enables a remote control of victim's machine.

Payload

Process activity

The Backdoor creates the following process(es):

%original file name%.exe:972

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

notepad.exe:240
svchost.exe:1332

Mutexes

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

File activity

The process notepad.exe:240 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):

%WinDir%\InstallDir\Server.exe (33 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\UyEWrxhbnT.dat (322 bytes)

Registry activity

The process %original file name%.exe:972 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D6 B6 1D 50 EE 2A 1C 12 3A 6E 6E 7E 99 77 25 AB"

[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" = "UyEWrxhbnT"

The process notepad.exe:240 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKCU\Software\UyEWrxhbnT]
"ServerStarted" = "18/02/2016 04:53:03"

[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 1D 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\Cryptography\RNG]
"Seed" = "C3 82 1C 2A 4B F2 D8 79 5A EF C9 00 75 42 F5 88"

[HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\{1TI7DK7E-C1P2-558Q-VH41-X3XW4V6618GE}]
"StubPath" = "%WinDir%\InstallDir\Server.exe restart"

[HKCU\Software\UyEWrxhbnT]
"ServerName" = "%WinDir%\InstallDir\Server.exe"

[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:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"HKLM" = "%WinDir%\InstallDir\Server.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" = "%WinDir%\InstallDir\Server.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

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

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 29
088d672ec89c5e64653a39824efb8bd6
acec496972fe1df16c71234bfd002ae3
efe3e3f56fc80b503bfb34a792109e15
806ab0aa75079ca8830880151025022d
00875c665ffc2c45ceee65894899f3d2
63f9417b091568c3cf03c623778280cf
aa736ca565d4a974b9996a92393e6b3b
68cb88a719e22208dab1e3f0eb40c644
c19c555d466a5236eecf68caee8be222
17f96cc6f59a7a59930e2c7f3ba0c7b0
a418d1437d4be571517b3373e6a7b6a6
f45d4f99a27e91429a1154e594011baa
11e3bbea15a3f1b1773adc6c3bb56677
7d880d345915084e072ff6e64431d92f
0b7c77a6754fd850a2fa7f39e6b5b011
f978f6fe21a1364d5bbbc53aa6685e97
7840c3eec497bea19d6b9f8336ed82fd
9c0bf3c4efb129cdad101feb4a1ea071
27e5f6599dee6c3148e1e4dccfda2423
6724035489bbad1df81bf3a06618cbfb
04906659c2aef2cb3c53f7c07061635f
1cdcd0ba5943b514a948a6391e1ca61c
ff18d2ed7afd9850b40e7a6f77776c40
e31bbc9dd0715b7196e8e81abc6717e7
bbbf4e222e1704127f8d58f5e3d7df2d

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):

.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_1332_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

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

<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

pepsicola.no-ip.org

Server.exe

notepad.exe

%System%\pnrpnsp

{1TI7DK7E-C1P2-558Q-VH41-X3XW4V6618GE}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

ftpuser

C:\Users\FaUyEWrxhbnTPERSIST

PTF.ftpserver.com

notepad.exe_240:

.text

`.data

.rsrc

comdlg32.dll

SHELL32.dll

WINSPOOL.DRV

COMCTL32.dll

msvcrt.dll

ADVAPI32.dll

KERNEL32.dll

NTDLL.DLL

GDI32.dll

USER32.dll

notepad.chm

hhctrl.ocx

CLSID\{ADB880A6-D8FF-11CF-9377-00AA003B7A11}\InprocServer32

notepad.pdb

t%SSh

_acmdln

RegCloseKey

RegCreateKeyW

RegOpenKeyExA

SetViewportExtEx

GetKeyboardLayout

name="Microsoft.Windows.Shell.notepad"

version="5.1.0.0"

<description>Windows Shell</description>

name="Microsoft.Windows.Common-Controls"

version="6.0.0.0"

publicKeyToken="6595b64144ccf1df"

&*$#$$#$*

MMMrMMM`MMMRMMMFMMM:MMM.MMM"MMM

*.txt

/.SETUP

5.1.2600.5512 (xpsp.080413-2105)

NOTEPAD.EXE

Windows

Operating System

5.1.2600.5512

notepad.hlp

Text Documents (*.txt)

You cannot quit Windows because the Save As dialog

dialog box, and then try quitting Windows again.

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 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.

Page %d

Ln %d, Col %d

notepad.exe_240_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

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

<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

pepsicola.no-ip.org

Server.exe

notepad.exe

%System%\pnrpnsp

{1TI7DK7E-C1P2-558Q-VH41-X3XW4V6618GE}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

ftpuser

C:\Users\FaUyEWrxhbnTPERSIST

PTF.ftpserver.com

c:\%original file name%.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:972
   

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

   %WinDir%\InstallDir\Server.exe (33 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\UyEWrxhbnT.dat (322 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "HKLM" = "%WinDir%\InstallDir\Server.exe"
   
   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "HKCU" = "%WinDir%\InstallDir\Server.exe"

5. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
   
6. Reboot the computer.
   

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