Gen.Variant.Kazy.10474_7332b0c515 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

uhfyav.exe:1364
%original file name%.exe:1756

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

Explorer.EXE:1572

Mutexes

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

File activity

The process %original file name%.exe:1756 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\tmpdae11fda.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Baegi\uhfyav.exe (148 bytes)

Registry activity

The process uhfyav.exe:1364 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "90 0F 36 1F AF 9B D3 2D 3C 1C 5C 8B 6D EC 37 00"

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

The process %original file name%.exe:1756 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D0 49 F0 7B D1 5B DD 58 1E A0 98 34 E8 68 5A B6"

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

[HKCU\Software\Microsoft\Toad]
"Rovyw" = "A3 FD D8 C1 A1 C9 9C 67 D4 EE E0 F5 A4 01 01 D2"

Adds a rule to the firewall Windows which allows any network activity:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%windir%]
"explorer.exe" = "%windir%\explorer.exe"

The Trojan adds process executable file it works in to the list of trusted Windows Firewall applications:

[HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List\%windir%]
"explorer.exe" = "%windir%\explorer.exe"

Dropped PE files

MD5	File path
dafc7b1cc92de9126bfb9b54fb554b54	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Baegi\uhfyav.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetQueryDataAvailable
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle

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

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*

Scan a system with an anti-rootkit tool.
Terminate malicious process(es) (How to End a Process With the Task Manager):
uhfyav.exe:1364
%original file name%.exe:1756
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Local Settings\Temp\tmpdae11fda.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Baegi\uhfyav.exe (148 bytes)
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: Opera Software
Product Name: Opera Internet Browser
Product Version: 11.61
Legal Copyright: Copyright (c) Opera Software 1995-2012
Legal Trademarks:
Original Filename: Opera.exe
Internal Name: Opera
File Version: 1250
File Description: Opera Internet Browser
Comments:
Language: English (United States)

Company Name: Opera SoftwareProduct Name: Opera Internet BrowserProduct Version: 11.61Legal Copyright: Copyright (c) Opera Software 1995-2012Legal Trademarks: Original Filename: Opera.exeInternal Name: OperaFile Version: 1250File Description: Opera Internet BrowserComments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
UPX0	4096	155648	0	0	d41d8cd98f00b204e9800998ecf8427e
UPX1	159744	147456	145920	5.54279	a7f49a536c724d1a7244b97ec4e6d35c
.rsrc	307200	4096	1536	2.17673	b558fcd0c05208542f942c3dd1edcdf4

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://layerofficerez.com/bxs/wedzx.php	82.165.37.26

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:29 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:29 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:24 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:19 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:13 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:24 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:13 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

POST /bxs/wedzx.php HTTP/1.1

Accept: */*

Content-Type: application/x-www-form-urlencoded

Connection: Close

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: layerofficerez.com

Content-Length: 64

Cache-Control: no-cache

.. .w. .M.KuM.(@...c`.C..bS....&.,.....aYd5..ut.6 ..4...4.....E.

HTTP/1.1 404 Not Found

Server: nginx/1.6.2

Date: Sat, 14 Mar 2015 21:37:19 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.6.2</center>..</body>..</html>................

Map

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

Strings from Dumps

Explorer.EXE_1572_rwx_01E20000_00027000:

.text

`.data

.reloc

6 !26!1'1!

.' 6,7* 9&0

7307#163

5("15"2$2

.( 8&

3.$73$4"4

?23

-/."%1-$$:

;&,?;,

34!9#."9=

F{qbfqawAQv}kwhucp[Ootfpci{.Lp{fZFRDm`A[K]\G

hXXp://

hXXps://

PR_OpenTCPSocket

*.jpg*|*.js*|*.css*|*.gif*|*.png*|*.ico*

HTTP/1.1

gdiplus.dll

GdiplusShutdown

ole32.dll

gdi32.dll

userenv.dll

del "%s"

if exist "%s" goto d

del /F "%s"

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

Content-Type: application/x-www-form-urlencoded

urlmon.dll

cabinet.dll

PSSSSSSh

SSSh@

GetProcessHeap

KERNEL32.dll

MapVirtualKeyW

GetKeyboardState

OpenWindowStationW

GetProcessWindowStation

CreateWindowStationW

CloseWindowStation

SetProcessWindowStation

ExitWindowsEx

SetKeyboardState

MsgWaitForMultipleObjects

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

%}%CZ

3%3S3

nspr4.dll

e.dat

SysShadow

kernel32.dll

"%s" %s

/c "%s"

%sx.%s

%sx

cGlobal\XXX

Global\{68061D29-CEE9-3CBC-1216-BD00F1803844}

%Documents and Settings%\%current user%\Application Data\Pey\nuduak.obl

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

nuduak.obl

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

{1765293A-FAFA-43DF-1216-BD00F1803844}

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps