Gen.Trojan.Heur.AutoIT.2_969a9c3827 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

at.exe:1068
at.exe:1648

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

%original file name%.exe:1792

Mutexes

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

File activity

The process %original file name%.exe:1792 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%WinDir%\winhelp.ini (784 bytes)
%System%\winhelp.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%WinDir%\regsvr.exe (7547 bytes)
%System%\rundll.exe (673 bytes)
%System%\COMCTL32.OCX (2865 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut4.tmp (1769 bytes)
%System%\setup.ini (164 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (2801 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (392 bytes)
%System%\regsvr.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (2049 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut4.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (0 bytes)

Registry activity

The process at.exe:1068 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "46 3D E8 B6 CA 70 B4 0C DF 50 55 23 0C 91 5A 66"

The process at.exe:1648 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7C 1F 27 74 71 EB 40 8F 41 0C 65 F4 65 FF 44 3D"

The process %original file name%.exe:1792 makes changes in the system registry.

The Trojan 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"
"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\Internet Settings]
"GlobalUserOffline" = "0"

[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\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"

[HKLM\System\CurrentControlSet\Services\Schedule]
"AtTaskMaxHours" = "0"

[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\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"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
"NoFolderOptions" = "0"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"System" = "Winhelp.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System]
"DisableTaskMgr" = "0"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "07 60 67 39 AF 06 A1 DB F1 05 F7 69 23 94 E1 06"

[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\Policies\System]
"DisableRegistryTools" = "1"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Yahoo Messengger" = "%System%\regsvr.exe"

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:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

The Trojan 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 Trojan 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 Trojan adds the reference to itself to be executed when a user logs on:

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"Shell" = "Explorer.exe rundll.exe"

The Trojan deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

Dropped PE files

MD5	File path
db7b8fa4a80923c2ef67853ffc4b4cb1	c:\WINDOWS\system32\COMCTL32.OCX
19eca722500302f159f9872fcfed19ee	c:\WINDOWS\system32\rundll.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

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):
at.exe:1068
at.exe:1648
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%WinDir%\winhelp.ini (784 bytes)
%System%\winhelp.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%WinDir%\regsvr.exe (7547 bytes)
%System%\rundll.exe (673 bytes)
%System%\COMCTL32.OCX (2865 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut4.tmp (1769 bytes)
%System%\setup.ini (164 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut3.tmp (2801 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut1.tmp (392 bytes)
%System%\regsvr.exe (7547 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\aut2.tmp (2049 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Yahoo Messengger" = "%System%\regsvr.exe"
Remove the references to the Trojan by modifying the following registry value(s) (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
"Shell" = "Explorer.exe rundll.exe"
Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Reboot the computer.

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

Static Analysis

VersionInfo

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

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

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	413775	414208	4.64736	b2473821b6b59bc40b8911d5087ad2a7
.rdata	421888	57832	57856	3.32004	49c3e89752eb0893dbb5bde46aa62958
.data	483328	102136	10752	2.68945	61be59dc3ac4214b38825b9ba18ddf9b
.rsrc	585728	770048	692736	5.07868	8976c4d15c2b2c55e430b79cd99ba86f

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://109.201.131.16/setting.doc
hxxp://109.201.131.16/setting.xls

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

%original file name%.exe_1792:

.text

.rdata

.data

.rsrc

PSShD

|$(;|$,~

t=Ht.Ht

t.Ht Ht

YtMSSh

!!!!!!""#$%&'(((((())* ,-.DDDDDDDD//01234555676789:;<:>?@ABC

.VVVVVSRSSj

tGHt.Ht&

operand of unlimited repeat could match the empty string

POSIX named classes are supported only within a class

erroffset passed as NULL

POSIX collating elements are not supported

this version of PCRE is not compiled with PCRE_UTF8 support

PCRE does not support \L, \l, \N, \U, or \u

support for \P, \p, and \X has not been compiled

(*VERB) with an argument is not supported

mscoree.dll

.mixcrt

KERNEL32.DLL

Please contact the application's support team for more information.

- Attempt to initialize the CRT more than once.

- CRT not initialized

- floating point support not loaded

GetProcessWindowStation

USER32.DLL

operator

kernel32.dll

This is a compiled AutoIt script. AV researchers please email avsupport@autoitscript.com for support.

uxtheme.dll

APPSKEY

ASC 0%d

Psapi.dll

shell32.dll

user32.dll

Wininet.dll

FtpGetFileSize

ICMP.DLL

InternetOpenUrlW

HttpOpenRequestW

HttpSendRequestW

HttpQueryInfoW

FtpOpenFileW

InternetCrackUrlW

Advapi32.dll

ADVAPI32.dll

COMCTL32.dll

comdlg32.dll

GDI32.dll

MPR.dll

ole32.dll

OLEAUT32.dll

SHELL32.dll

USER32.dll

VERSION.dll

WINMM.dll

WSOCK32.dll

GetWindowsDirectoryW

CreatePipe

PeekNamedPipe

GetProcessHeap

GetCPInfo

GetConsoleOutputCP

RegDeleteKeyW

RegCreateKeyExW

RegEnumKeyExW

RegCloseKey

RegOpenKeyExW

SetViewportOrgEx

ShellExecuteExW

SHFileOperationW

ShellExecuteW

UnregisterHotKey

ExitWindowsEx

EnumThreadWindows

GetAsyncKeyState

GetKeyboardState

GetKeyState

VkKeyScanA

GetKeyboardLayoutNameA

EnumWindows

EnumChildWindows

MapVirtualKeyW

GetKeyboardLayoutNameW

RegisterHotKey

SetKeyboardState

keybd_event

zcÃ

.LjR=W

.Jbjx=

version="3.0.0.0"

name="Microsoft.Windows.Common-Controls"

version="6.0.0.0"

publicKeyToken="6595b64144ccf1df"

^:u%C)Kk4

Dd.gC

LSu

e-Y}%,

Sy%D&

Jnf.YCa

n.NO9

aW:.kH

iy.Vx

G4%fY

.Ok]d

rSQL

_:.HR

\.lk'kI

.Lpz=

9n-b}S

%Uh*D

.srp^

8=H.Gd

?ne.Ap

F.Wm4

%S}%#

ec3%D

59.EbS

F.xiOP

N~Y.kY

J.LkB

Qc,lQ.Kr9

B=o.mnj

mcvH/)H5u".INp{

.IO

#M%d(

%cu7Dk

:Y.dl

!lB%x

GY%F^

49.yx

.ksgP?

4h.jDr

.MWyEc

S.np!

Ã¿fA

U.qT Ga

CMDLINERAW

CMDLINE

/AutoIt3ExecuteLine

/AutoIt3ExecuteScript

%s (%d) : ==> %s.:

Line %d:

Line %d (File "%s"):

%s (%d) : ==> %s:

AutoIt script files (*.au3, *.a3x)

*.au3;*.a3x

All files (*.*)

04090000

%u.%u.%u.%u

0.0.0.0

Mddddd

FTPSETPROXY

GUICTRLRECVMSG

GUICTRLSENDMSG

GUIGETMSG

GUIREGISTERMSG

HOTKEYSET

HTTPSETPROXY

ISKEYWORD

MSGBOX

REGENUMKEY

SHELLEXECUTE

SHELLEXECUTEWAIT

TCPACCEPT

TCPCLOSESOCKET

TCPCONNECT

TCPLISTEN

TCPNAMETOIP

TCPRECV

TCPSEND

TCPSHUTDOWN

TCPSTARTUP

TRAYGETMSG

UDPBIND

UDPCLOSESOCKET

UDPOPEN

UDPRECV

UDPSEND

UDPSHUTDOWN

UDPSTARTUP

URLDOWNLOADTOFILE

==> %s

\??\%s

GUI_RUNDEFMSG

FtpBinaryMode

SendKeyDelay

SendKeyDownDelay

TCPTimeout

AUTOITCALLVARIABLE%d

Keyword

AutoIt.Error

Null Object assignment in FOR..IN loop

Incorrect Object type in FOR..IN loop

.AUTOITX64

HOTKEYPRESSED

AUTOITEXE

WINDOWSDIR

SOFTWARE\Microsoft\Windows\CurrentVersion

SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders

UNKN%d

WIN32_WINDOWS

.DEFAULT\Control Panel\Desktop\ResourceLocale

3, 2, 10, 0

HKEY_LOCAL_MACHINE

HKEY_CLASSES_ROOT

HKEY_CURRENT_CONFIG

HKEY_CURRENT_USER

HKEY_USERS

%d/d/d

c:\%original file name%.exe

C:\%original file name%.exe

supports the __stdcall (WINAPI) and __cdecl calling conventions. The __stdcall (WINAPI) convention is used by default but __cdecl can be used instead. See the DllCall() documentation for details on changing the calling convention.

Missing operator in expression."Unbalanced brackets in expression.

0Incorrect number of parameters in function call.'"ReDim" used without an array variable.>Illegal text at the end of statement (one statement per line).1"If" statement has no matching "EndIf" statement.1"Else" statement with no matching "If" statement.2"EndIf" statement with no matching "If" statement.7Too many "Else" statements for matching "If" statement.3"While" statement has no matching "Wend" statement.4"Wend" statement with no matching "While" statement.%Variable used without being declared.XArray variable has incorrect number of subscripts or subscript dimension range exceeded.)Array variable subscript badly formatted.'Subscript used with non-Array variable.&Too many subscripts used for an array.0Missing subscript dimensions in "Dim" statement.NNo variable given for "Dim", "Local", "Global", "Struct" or "Const" statement.0Expected a "=" operator in assignment statement.*Invalid keyword at the start of this line.

Unknown macro.'Unable to execute the external program.*Unable to get a list of running processes.*Missing separator character after keyword.

Invalid element in a DllStruct.*Unknown option or bad parameter specified.&Unable to load the internet libraries./"Struct" statement has no matching "EndStruct".HUnable to open file, the maximum number of open files has been exceeded.

Invalid file filter given.*Expected a variable in user function call.1"Do" statement has no matching "Until" statement.2"Until" statement with no matching "Do" statement.#"For" statement is badly formatted.2"Next" statement with no matching "For" statement.N"ExitLoop/ContinueLoop" statements only valid from inside a For/Do/While loop.1"For" statement has no matching "Next" statement.@"Case" statement with no matching "Select"or "Switch" statement.:"EndSelect" statement with no matching "Select" statement.ORecursion level has been exceeded - AutoIt will quit to prevent stack overflow.

Badly formated Enum statement!Badly formated variable or macro.3This keyword cannot be used after a "Then" keyword.

>"Select" statement is missing "EndSelect" or "Case" statement. "If" statements must have a "Then" keyword. Badly formated Struct statement."Cannot assign values to constants..Cannot make existing variables into constants.:Only Object-type variables allowed in an "With" statement.v"long_ptr", "int_ptr" and "short_ptr" DllCall() types have been deprecated. Use "long*", "int*" and "short*" instead.-Object referenced outside a "With" statement.)Nested "With" statements are not allowed."Variable must be of type "Object".1The requested action with this object has failed.8Variable appears more than once in function declaration.2ReDim array can not be initialized in this manner.1An array variable can not be used in this manner.

HCan pass constants by reference only to parameters with "Const" keyword.*Can not initialize a variable with itself.$Incorrect way to use this parameter.:"EndSwitch" statement with no matching "Switch" statement.>"Switch" statement is missing "EndSwitch" or "Case" statement.H"ContinueCase" statement with no matching "Select"or "Switch" statement.

Assert Failed!I has encountered a fatal crash as a result of: Unable to execute DLLCall.

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps