Gen.Variant.Kazy.665845_b0e7983080

by malwarelabrobot on October 11th, 2015 in Malware Descriptions.

Trojan.Win32.Agentb.bqcx (Kaspersky), Gen:Variant.Kazy.665845 (B) (Emsisoft), Gen:Variant.Kazy.665845 (AdAware), Trojan-PSW.Win32.Zbot.6.FD, GenericInjector.YR, BackdoorCaphaw_QKKBAL.YR, TrojanPSWZbot.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, Trojan, Backdoor


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

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Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: b0e7983080f42ff6205b1f321501b8a3
SHA1: ddd3c33fa4d788d491daabb2d72dd9d5650e367b
SHA256: 6c734b64a013c9a51750746e74a56f32d492b48a7f84232a104fa5a2954626a9
SSDeep: 6144:aicyj93d7G9Z6LXWu/ivy60r1hGQWqS2qPSk5:YCN7Awwa60r1hGQWqS
Size: 206848 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2015-07-07 11:25:01
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):

%original file name%.exe:224
fuxeo.exe:1304

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

Explorer.EXE:1140

Mutexes

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

File activity

The process %original file name%.exe:224 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\tmpc18e3a64.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Igqeor\fuxeo.exe (206 bytes)

Registry activity

The process %original file name%.exe:224 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "7A 6C 28 53 2D 2E E9 BF F4 0F 37 06 47 A6 75 A7"

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

The process fuxeo.exe:1304 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "00 6F C2 9E B0 8D 07 BC 1B BB E7 77 EB CB 4A CB"

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

Dropped PE files

MD5 File path
04373472111b2717fb0dcd83e16e9823 c:\Documents and Settings\"%CurrentUserName%"\Application Data\Igqeor\fuxeo.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

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 20951 20992 4.626 85dbb9033e1c5d4930f9b131d2194cf3
.rdata 28672 520 1024 1.76529 9c4d7b015c69e8c083c60700145db15b
.data 32768 1392 1024 3.2983 371fbc0ec159d0317abde17f67ffa72b
.rsrc 36864 1136 1536 2.36684 38b6a710d2a4c2dba203b10f105d0c50
.reloc 40960 180854 181248 5.54292 0f5d02e369ad500f20fc419b894a0a99

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
38a4f47063688add718be503ca7c190e

URLs

URL IP
hxxp://62.109.7.137/googleAD/update/conf.bin


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET CURRENT_EVENTS Zbot Generic URI/Header Struct .bin

Traffic

GET /googleAD/update/conf.bin HTTP/1.1
Accept: */*
User-Agent: Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 6.2)
Host: 62.109.7.137
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Server: nginx
Date: Sat, 10 Oct 2015 09:55:37 GMT
Content-Type: text/html; charset=iso-8859-1
Content-Length: 222
Connection: keep-alive
Keep-Alive: timeout=60
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /go
ogleAD/update/conf.bin was not found on this server.</p>.</bo
dy></html>.....


GET /googleAD/update/conf.bin HTTP/1.1


Accept: */*
User-Agent: Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 6.2)
Host: 62.109.7.137
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Server: nginx
Date: Sat, 10 Oct 2015 09:55:37 GMT
Content-Type: text/html; charset=iso-8859-1
Content-Length: 222
Connection: keep-alive
Keep-Alive: timeout=60
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /go
ogleAD/update/conf.bin was not found on this server.</p>.</bo
dy></html>.HTTP/1.1 404 Not Found..Server: nginx..Date: Sat, 
10 Oct 2015 09:55:37 GMT..Content-Type: text/html; charset=iso-8859-1.
.Content-Length: 222..Connection: keep-alive..Keep-Alive: timeout=60..
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /go
ogleAD/update/conf.bin was not found on this server.</p>.</bo
dy></html>.....

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

Explorer.EXE_1140_rwx_01E00000_0002C000:

.text
`.data
.reloc
gdiplus.dll
GdiplusShutdown
ole32.dll
gdi32.dll
HTTP/1.1
hXXp://62.109.7.137/googleAD/update/conf.bin
Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 6.2)
pufjwdx.jvh
" !=%(>";;
=225;6%%7!=
3:6 1*7=$;-
*4*-0*1?7!
MK[(bocmdgs
15#77??68.
&'/( <99
$!*4,#)<:
mfh{g~amzgs.dgg
:; 1299;2
>.Rdd
<-?).$: (26
userenv.dll
del "%s"
if exist "%s" goto d
del /F "%s"
urlmon.dll
cabinet.dll
hXXp://
hXXps://
HTTP/1.
hXXp://VVV.google.com/webhp
t7SSSh
t"SSSh
GetProcessHeap
KERNEL32.dll
MapVirtualKeyW
ExitWindowsEx
OpenWindowStationW
GetProcessWindowStation
CreateWindowStationW
CloseWindowStation
SetProcessWindowStation
SetKeyboardState
GetKeyboardState
MsgWaitForMultipleObjects
USER32.dll
RegOpenKeyExW
RegEnumKeyExW
RegCloseKey
RegCreateKeyExW
ADVAPI32.dll
UrlUnescapeA
SHDeleteKeyW
PathIsURLW
SHLWAPI.dll
ShellExecuteW
SHELL32.dll
Secur32.dll
SetViewportOrgEx
GDI32.dll
WS2_32.dll
CertDeleteCertificateFromStore
CertOpenSystemStoreW
CertCloseStore
PFXImportCertStore
CertEnumCertificatesInStore
CertDuplicateCertificateContext
PFXExportCertStoreEx
CRYPT32.dll
HttpQueryInfoA
InternetCrackUrlA
HttpOpenRequestA
HttpAddRequestHeadersA
HttpSendRequestA
HttpSendRequestExA
HttpSendRequestExW
HttpSendRequestW
GetUrlCacheEntryInfoW
HttpAddRequestHeadersW
WININET.dll
OLEAUT32.dll
NETAPI32.dll
=?>#?.?;?
9%9)9/939
SysShadow
kernel32.dll
"%s" %s
/c "%s"
%sx.%s
%sx
cGlobal\XXX
Global\{ACDE96FE-DEF6-99E0-29F3-E3609A941101}
%Documents and Settings%\%current user%\Application Data
{E4AB7824-85C8-1C53-77BA-1BBC62C761EF}
%Documents and Settings%\%current user%\Application Data\Liis\maork.uzg
%Documents and Settings%\%current user%\Application Data\Liis
maork.uzg


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):

    %original file name%.exe:224
    fuxeo.exe:1304

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

    %Documents and Settings%\%current user%\Local Settings\Temp\tmpc18e3a64.bat (177 bytes)
    %Documents and Settings%\%current user%\Application Data\Igqeor\fuxeo.exe (206 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.

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