Gen.Variant.Strictor.51471_520d14718e

by malwarelabrobot on May 11th, 2016 in Malware Descriptions.

Susp_Dropper (Kaspersky), Gen:Variant.Strictor.51471 (B) (Emsisoft), Gen:Variant.Strictor.51471 (AdAware), Trojan.Win32.FlyStudio.FD, GenericEmailWorm.YR, GenericInjector.YR, TrojanFlyStudio.YR (Lavasoft MAS)
Behaviour: Trojan, Worm, EmailWorm


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

Requires JavaScript enabled!

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

MD5: 520d14718e704b11219a8c1b4837e709
SHA1: d24a25714b9c2b8e3cc60f81141119489e13e1b1
SHA256: abd71097f96925778ef4e1e7468ef1fc61e5b91f7c5c95a8a3cc5e4c071c2759
SSDeep: 12288:GtAs z2OZ78NRV KBd5KbHxuq1QnmrlKSc f:GjLKsq1Qnms
Size: 525312 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: PackerUPXCompresorGratuitowwwupxsourceforgenet, UPolyXv05_v6
Company: no certificate found
Created at: 2013-06-18 12:53:11
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

Behaviour Description
EmailWorm Worm can send e-mails.


Process activity

The Trojan creates the following process(es):
No processes have been created.
The Trojan injects its code into the following process(es):

%original file name%.exe:1316

Mutexes

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

File activity

The process %original file name%.exe:1316 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\O5U309QN\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\SDUFG1UB\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\History\History.IE5\desktop.ini (159 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\LI89X7A7\desktop.ini (67 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\78WS68I9\desktop.ini (67 bytes)

Registry activity

The process %original file name%.exe:1316 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"

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

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

"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"

[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\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 1B 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4F D8 23 55 85 AF EB E6 18 8F D2 71 E9 F2 DC CE"

[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\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[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\Multimedia\DrawDib]
"vga.drv 1276x846x32(BGR 0)" = "31,31,31,31"

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 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

VersionInfo

Company Name: QQ228843415
Product Name: ??
Product Version: 1.0.0.0
Legal Copyright: QQ228843415 ????
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 1.0.0.0
File Description: ??QQ???????
Comments: ??
Language: Chinese (Simplified, PRC)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
UPX0 4096 630784 0 0 d41d8cd98f00b204e9800998ecf8427e
UPX1 634880 491520 491520 5.47197 53851dfc1226759e749426b38ab0f805
.rsrc 1126400 32768 32768 3.8305 807ae39735a33ec2ae060e54fc7258e8

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
7b66806c9de2c3b45a84a75cbf2c40b6

URLs

URL IP
hxxp://captcha.qq.com/getimage?aid=15002005&uin= 112.90.83.73


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET POLICY Unsupported/Fake Windows NT Version 5.0

Traffic

GET /getimage?aid=15002005&uin= HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Accept: */*
Host: captcha.qq.com
Cache-Control: no-cache


HTTP/1.1 200 OK
Server: tencent http server
Accept-Ranges: bytes
Pragma: No-cache
P3P: CP=CAO PSA OUR
Content-Length: 1658
Set-Cookie: verifysession=h01d6d34ecea205d1989ab38717ab863a1aeee52cee88889ea271c18b5fd15993282ddcafa03a906b9c; PATH=/; DOMAIN=qq.com;
Connection: close
Content-Type: image/jpeg
......JFIF............."250e3b18...........................C..........
......(.....1#%.(:3=<9387@H\N@DWE78PmQW_bghg>Mqypdx\egc...C.....
../../cB8Bcccccccccccccccccccccccccccccccccccccccccccccccccc......5...
."............................................................}.......
.!1A..Qa."q.2....#B...R..$3br........%&'()*456789:CDEFGHIJSTUVWXYZcdef
ghijstuvwxyz..........................................................
....................................................................w.
......!1..AQ.aq."2...B.....#3R..br...$4.%.....&'()*56789:CDEFGHIJSTUVW
XYZcdefghijstuvwxyz...................................................
.................................?..)....q.I.G.;p.d....8....R.5=.5....
.............B.D.vn...N..........4'....>..)y....t..`y.=.(9OqPCu.I..
.....JG...:4i.h.1RX). .YSjw*...........=:....9.|./^.......\...]U{#q.]w
#....Y?hd.;..F.%Q...?.....2.QE...QE..QE..QE.U..8.....*.._.Iv..jO@..)5"
R....'.~...jK.2@.>J........;1.]\.8]......d.:..*.pog~......[|.wH:e[.
..j.h..5).*......X6............j`.Dw.f1.[q.$.8.....|. ...t.g..Y.@.. .9
..[.J.. ..`...7...9...^...b..1$.r...m......."ko1.A.}........=#..(I./..
..........<{.....%f>Dgh......{.....A./. .1._A....K............jO
..ua4....L.....W6..%.q..e.5M..._.....m9.W.#....V.. ..S........U..w...%
.O....Ai..Q@..(....R.2.....}3.1Iqk...w..E..s%u}0o s...R.....6{....x
mI.......Z...y[..u&..k.c......E< \i..lB\..G...=..w.:......#.d..F.jK
...ak!.&Lr.0%.....A....F.K....Ycc.}....`.....!.2{....'....7m.....j..q.
.........\...u.....]...i..8VkiNd.2Q.....R.R......"p...z...oU ..i..
<<< skipped >>>

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

%original file name%.exe_1316:

`.rsrc
.Ä%
t$(SSh
~%UVW
u$SShe
wininet.dll
shlwapi.dll
user32.dll
HttpOpenRequestA
HttpSendRequestA
HttpQueryInfoA
hXXp://captcha.qq.com/getimage?aid=15002005&uin=
.rsrc
%S4WD
hg%fpM
S.Ac9SR
0.I%3s
,wAe.kI
aiUy'4xu
%c*@j
.eH'y
{&%U)
lj%4U
xe%CNs
9F.cLe
hJK.ZH
O.qt0
KERNEL32.DLL
COMCTL32.dll
GDI32.dll
MSIMG32.dll
MSVCRT.dll
MSVFW32.dll
USER32.dll
SkinH_EL.dll
Avi.CT
xhZ_6%U
%SY!8i
hXXp://iframe.ip138.com/ic.asp
hXXp://code.helpor.net/mine/ip.php
&site=qqjia.com&menu=yes
hXXp://sighttp.qq.com/msgrd?v=1&uin=
hXXp://crm2.qq.com/page/portalpage/wpa.php?uin=40012345&f=1&ty=1&ap=000011:400998:|m:12|f:KFXD11
&aid=15002005&u1=http://qz.qq.com&h=1&ptredirect=1&ptlang=2052&from_ui=1&dumy=&fp=loginerroralert&action=3-14-10797&mibao_css=&t=1&g=1
hXXp://ptlogin2.qq.com/login?u=
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
http=
HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Content-Type: application/x-www-form-urlencoded
hXXp://
skey=
WSOCK32.dll
WSockHooK.dll
WpeSpy.dll
MSWSOCK.dll
mydll.dll
%S8y)
v:.Ag
%:.QE
T[.an
F%*.*f
CNotSupportedException
commctrl_DragListMsg
Afx:%x:%x:%x:%x:%x
Afx:%x:%x
COMCTL32.DLL
CCmdTarget
__MSVCRT_HEAP_SELECT
iphlpapi.dll
SHLWAPI.dll
MPR.dll
VERSION.dll
.PAVCException@@
.PAVCNotSupportedException@@
.PAVCFileException@@
(*.prn)|*.prn|
(*.*)|*.*||
Shell32.dll
Mpr.dll
Advapi32.dll
User32.dll
Gdi32.dll
Kernel32.dll
(&07-034/)7 '
?? / %d]
%d / %d]
: %d]
(*.WAV;*.MID)|*.WAV;*.MID|WAV
(*.WAV)|*.WAV|MIDI
(*.MID)|*.MID|
(*.txt)|*.txt|
(*.JPG;*.BMP;*.GIF;*.ICO;*.CUR)|*.JPG;*.BMP;*.GIF;*.ICO;*.CUR|JPG
(*.JPG)|*.JPG|BMP
(*.BMP)|*.BMP|GIF
(*.GIF)|*.GIF|
(*.ICO)|*.ICO|
(*.CUR)|*.CUR|
%s:%d
windows
out.prn
%d.%d
%d / %d
%d/%d
Bogus message code %d
(%d-%d):
%ld%c
HTTP/1.0
%s <%s>
Reply-To: %s
From: %s
To: %s
Subject: %s
Date: %s
Cc: %s
%a, %d %b %Y %H:%M:%S
HELO %s
SMTP
AUTH LOGIN
LOGIN
AUTH=LOGIN
EHLO %s
Content-Type: application/octet-stream; name=%s
Content-Disposition: attachment; filename=%s
MAIL FROM:<%s>
RCPT TO:<%s>
VVV.dywt.com.cn
1.1.3
;3 #>6.&
'2, / 0&7!4-)1#
.PAVCObject@@
.PAVCSimpleException@@
.PAVCMemoryException@@
.?AVCNotSupportedException@@
.PAVCResourceException@@
.PAVCUserException@@
.?AVCCmdTarget@@
.?AVCCmdUI@@
.?AVCTestCmdUI@@
.PAVCArchiveException@@
zcÁ
c:\%original file name%.exe
#include "l.chs\afxres.rc" // Standard components
GetCPInfo
WinExec
GetProcessHeap
RegOpenKeyExA
RegCloseKey
RegCreateKeyExA
GetViewportExtEx
GetViewportOrgEx
SetViewportOrgEx
OffsetViewportOrgEx
SetViewportExtEx
ScaleViewportExtEx
ShellExecuteA
SetWindowsHookExA
GetKeyState
CreateDialogIndirectParamA
UnhookWindowsHookEx
InternetCanonicalizeUrlA
InternetCrackUrlA
.text
`.rdata
@.data
wookÊ
lA3"%C#i
)444//44445=
ADVAPI32.dll
comdlg32.dll
ole32.dll
OLEAUT32.dll
RASAPI32.dll
SHELL32.dll
WININET.dll
WINMM.dll
WINSPOOL.DRV
WS2_32.dll
1, 0, 6, 6
- Skin.dll
(*.*)
1.0.0.0

%original file name%.exe_1316_rwx_00401000_00111000:

t$(SSh
~%UVW
u$SShe
wininet.dll
shlwapi.dll
user32.dll
HttpOpenRequestA
HttpSendRequestA
HttpQueryInfoA
hXXp://captcha.qq.com/getimage?aid=15002005&uin=
.rsrc
%S4WD
hg%fpM
S.Ac9SR
0.I%3s
,wAe.kI
aiUy'4xu
%c*@j
.eH'y
{&%U)
lj%4U
xe%CNs
9F.cLe
hJK.ZH
O.qt0
KERNEL32.DLL
COMCTL32.dll
GDI32.dll
MSIMG32.dll
MSVCRT.dll
MSVFW32.dll
USER32.dll
SkinH_EL.dll
Avi.CT
xhZ_6%U
%SY!8i
hXXp://iframe.ip138.com/ic.asp
hXXp://code.helpor.net/mine/ip.php
&site=qqjia.com&menu=yes
hXXp://sighttp.qq.com/msgrd?v=1&uin=
hXXp://crm2.qq.com/page/portalpage/wpa.php?uin=40012345&f=1&ty=1&ap=000011:400998:|m:12|f:KFXD11
&aid=15002005&u1=http://qz.qq.com&h=1&ptredirect=1&ptlang=2052&from_ui=1&dumy=&fp=loginerroralert&action=3-14-10797&mibao_css=&t=1&g=1
hXXp://ptlogin2.qq.com/login?u=
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
http=
HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Content-Type: application/x-www-form-urlencoded
hXXp://
skey=
WSOCK32.dll
WSockHooK.dll
WpeSpy.dll
MSWSOCK.dll
mydll.dll
%S8y)
v:.Ag
%:.QE
T[.an
F%*.*f
CNotSupportedException
commctrl_DragListMsg
Afx:%x:%x:%x:%x:%x
Afx:%x:%x
COMCTL32.DLL
CCmdTarget
__MSVCRT_HEAP_SELECT
iphlpapi.dll
SHLWAPI.dll
MPR.dll
VERSION.dll
.PAVCException@@
.PAVCNotSupportedException@@
.PAVCFileException@@
(*.prn)|*.prn|
(*.*)|*.*||
Shell32.dll
Mpr.dll
Advapi32.dll
User32.dll
Gdi32.dll
Kernel32.dll
(&07-034/)7 '
?? / %d]
%d / %d]
: %d]
(*.WAV;*.MID)|*.WAV;*.MID|WAV
(*.WAV)|*.WAV|MIDI
(*.MID)|*.MID|
(*.txt)|*.txt|
(*.JPG;*.BMP;*.GIF;*.ICO;*.CUR)|*.JPG;*.BMP;*.GIF;*.ICO;*.CUR|JPG
(*.JPG)|*.JPG|BMP
(*.BMP)|*.BMP|GIF
(*.GIF)|*.GIF|
(*.ICO)|*.ICO|
(*.CUR)|*.CUR|
%s:%d
windows
out.prn
%d.%d
%d / %d
%d/%d
Bogus message code %d
(%d-%d):
%ld%c
HTTP/1.0
%s <%s>
Reply-To: %s
From: %s
To: %s
Subject: %s
Date: %s
Cc: %s
%a, %d %b %Y %H:%M:%S
HELO %s
SMTP
AUTH LOGIN
LOGIN
AUTH=LOGIN
EHLO %s
Content-Type: application/octet-stream; name=%s
Content-Disposition: attachment; filename=%s
MAIL FROM:<%s>
RCPT TO:<%s>
VVV.dywt.com.cn
1.1.3
;3 #>6.&
'2, / 0&7!4-)1#
.PAVCObject@@
.PAVCSimpleException@@
.PAVCMemoryException@@
.?AVCNotSupportedException@@
.PAVCResourceException@@
.PAVCUserException@@
.?AVCCmdTarget@@
.?AVCCmdUI@@
.?AVCTestCmdUI@@
.PAVCArchiveException@@
zcÁ
c:\%original file name%.exe
#include "l.chs\afxres.rc" // Standard components
GetCPInfo
WinExec
GetProcessHeap
RegOpenKeyExA
RegCloseKey
RegCreateKeyExA
GetViewportExtEx
GetViewportOrgEx
SetViewportOrgEx
OffsetViewportOrgEx
SetViewportExtEx
ScaleViewportExtEx
ShellExecuteA
SetWindowsHookExA
GetKeyState
CreateDialogIndirectParamA
UnhookWindowsHookEx
InternetCanonicalizeUrlA
InternetCrackUrlA
.text
`.rdata
@.data
1, 0, 6, 6
- Skin.dll
(*.*)

%original file name%.exe_1316_rwx_10000000_0003E000:

`.rsrc
L$(h%f
SSh0j
msctls_hotkey32
TVCLHotKey
THotKey
\skinh.she
}uo,x6l5k%x-l h
9p%s m)t4`#b
e"m?c&y1`Ð<
SetViewportOrgEx
SetViewportExtEx
SetWindowsHookExA
UnhookWindowsHookEx
EnumThreadWindows
EnumChildWindows
`c%US.4/
!#$<#$#=
.text
`.rdata
@.data
.rsrc
@.UPX0
`.UPX1
`.reloc
hJK.ZH
O.qt0
KERNEL32.DLL
COMCTL32.dll
GDI32.dll
MSIMG32.dll
MSVCRT.dll
MSVFW32.dll
USER32.dll
SkinH_EL.dll
1, 0, 6, 6
- Skin.dll


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):No processes have been created.
  2. Delete the original Trojan file.
  3. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\O5U309QN\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\SDUFG1UB\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\History\History.IE5\desktop.ini (159 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\LI89X7A7\desktop.ini (67 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\78WS68I9\desktop.ini (67 bytes)

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

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

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