Gen.Variant.Kazy.224568_5f2cff16ea

by malwarelabrobot on October 14th, 2014 in Malware Descriptions.

Susp_Dropper (Kaspersky), Gen:Variant.Kazy.224722 (B) (Emsisoft), Gen:Variant.Kazy.224568 (AdAware), Backdoor.Win32.Simbot.FD, BackdoorSimbot.YR (Lavasoft MAS)
Behaviour: 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: 5f2cff16eae1d6b87c01c3f4db42269f
SHA1: 0246976adca5a2b9b78c0d256b3a5150b8861120
SHA256: 5e4f4ed5ac0705d12e0ac8e355996bd11fc8e531bcbe602cc12801d30b9cd45e
SSDeep: 384:zK7E/N/tX4ncfyL01scgYCOrXFQ/uH6vVgmAkO eVg:zK8P4wlI5SVQ/uCveVg
Size: 20992 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: Blood White
Created at: 2010-11-06 05:06:34
Analyzed on: WindowsXPESX SP3 32-bit


Summary:

Backdoor. Malware that enables a remote control of victim's machine.

Payload

No specific payload has been found.

Process activity

The Backdoor creates the following process(es):

%original file name%.exe:1592
regedit.exe:452

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

svchost.exe:508

Mutexes

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

File activity

The process %original file name%.exe:1592 makes changes in the file system.
The Backdoor creates and/or writes to the following file(s):

C:\RCXB2.tmp (23552 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\[email protected] (48 bytes)
C:\%original file name%.exe.tmp1 (373 bytes)

The Backdoor deletes the following file(s):

C:\%original file name%.exe.tmp1 (0 bytes)

Registry activity

The process %original file name%.exe:1592 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E1 90 2E D8 2E 7F 59 4C 29 EC C2 16 F3 39 37 75"

The process regedit.exe:452 makes changes in the system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "AE FC FB 1F 5E 8D 84 ED A2 BE 56 D8 FE 51 76 9C"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Netlogon" = "%Documents and Settings%\%current user%\Local Settings\Netlogon.exe"

Dropped PE files

MD5 File path
0d95cd931e3c5ea5189bd62e5046a06c c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Netlogon.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name: Adobe Systems, Inc.
Product Name: Flash? Player Installer/Uninstaller
Product Version: 10,1,53,64
Legal Copyright: Copyright ? 1996-2010 Adobe, Inc.
Legal Trademarks: Adobe? Flash? Player
Original Filename: FlashUtil.exe
Internal Name: Adobe? Flash? Player Installer/Uninstaller 10.1
File Version: 10,1,53,64
File Description: Adobe? Flash? Player Installer/Uninstaller 10.1 r53
Comments:
Language: English (United Kingdom)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 4392 4608 5.22695 bf48a645ffb85332520181c052d19e41
.rdata 12288 1045 1536 2.51569 b09e1f7c28fc22c6f6859d92fabdae15
.data 16384 927 512 2.52989 156b9f597adf1f082cf0a831730382cc
.rsrc 20480 12996 13312 5.42436 f916dec20651b1f32659a1a7d5f0da1d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 2
cb6f641748ece725b667597dd1a4a14c
cbaa311d0ebe07dba6b3cf3b9324f18b

URLs

URL IP
hxxp://71.41.214.210/hggla.php?id=004495111D307928CC
yahoofacebook.345.pl 60.249.95.143


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /hggla.php?id=004495111D307928CC HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Host: 71.41.214.210
Connection: Keep-Alive
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Server: thttpd/2.19-MX Mar  4 2013
Content-type: text/html
Date: Mon, 13 Oct 2014 22:25:48 GMT
Last-modified: Mon, 13 Oct 2014 22:25:48 GMT
Accept-Ranges: bytes
Connection: close
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN".  "h
ttp://VVV.w3.org/TR/html4/loose.dtd">.<html>.<head>.<
;meta http-equiv='X-UA-Compatible' content='IE=EmulateIE9' />.<m
eta http-equiv="Content-Type" content="text/html; charset=UTF-8">.&
lt;meta http-equiv="Content-Script-Type" content="text/javascript">
.<meta http-equiv="Content-Style-Type" content="text/css">.<m
eta name="publisher" content="MOBOTIX AG, Germany">.<meta name="
copyright" content="MOBOTIX AG, Germany">.<link rel="SHORTCUT IC
ON" href="/favicon.ico">.<link rel="apple-touch-icon" href="/app
le-touch-icon.png">.<meta name="author" content="Daniel Kabs, MO
BOTIX AG, Germany">.<link rel="owner" href="mailto:info@mobotix.
com">.<link rel="copyright" href="/about.html" title="Copyright"
>..<style type='text/css'>.body {.   font-family:Helvetica,Ar
ial,sans-serif;.   font-size:80%;.}.pre,textarea { font-family:monospa
ce; }..headtablesmall {  font-size:125%;  }..standard {} /* obsolete *
/..mxSubmitButton {.   width: 110px;.   margin:2px 0;.}..mxErrorMessag
e {.  color:red;.  background-color:yellow;.  font-weight:bold;.  padd
ing:5px;.}..mxFooterWarning {.  padding:5px;.  margin:0;.  background-
color:#DDDDDD;.  color:red;.  font-weight:bold;.}..mxFooterNote {.  pa
dding:5px;.  margin:0;.  background-color:#DDDDDD;.}..mxSubmitbuttonsR
ow {.  background-color:#DDDDDD;.  border-collapse:collapse;.}..mxSubm
itbuttonsRow td {.  padding:5px;.}..mxReadOnly {.  background:#eee
<<< skipped >>>

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

svchost.exe_508:

.text
`.rdata
@.data
SSh@C@
MFC42.DLL
MSVCRT.dll
_acmdln
WinExec
KERNEL32.dll
USER32.dll
ADVAPI32.dll
HttpQueryInfoA
InternetOpenUrlA
HttpSendRequestA
HttpOpenRequestA
WININET.dll
WS2_32.dll
iphlpapi.dll
SHLWAPI.dll
71.56.69.34
71.41.214.210
yahoofacebook.345.pl
regedit.exe /s
~dfds3.reg
Windows Registry Editor Version 5.00
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
%s.tmp1
[email protected]
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
/%s.php?id=d%s
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
X-X-X-X-X-X
01-01-01-01-01-01
%c%c%c%c%c%c.exe

svchost.exe_508_rwx_00400000_00005000:

.text
`.rdata
@.data
SSh@C@
MFC42.DLL
MSVCRT.dll
_acmdln
WinExec
KERNEL32.dll
USER32.dll
ADVAPI32.dll
HttpQueryInfoA
InternetOpenUrlA
HttpSendRequestA
HttpOpenRequestA
WININET.dll
WS2_32.dll
iphlpapi.dll
SHLWAPI.dll
71.56.69.34
71.41.214.210
yahoofacebook.345.pl
regedit.exe /s
~dfds3.reg
Windows Registry Editor Version 5.00
"%s"="%s"
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
WinHttp
%s.tmp1
[email protected]
hXXp://%s:%d/%s.php?id=d%s&ext=%s
/%s.php?id=d%s&ext=%s
hXXp://%s:%d/%s.php?id=d%s
%c%c%c%c%c
/%s.php?id=d%s
%%temp%%\%u
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Content-Type: application/x-www-form-urlencoded
HTTP/1.1
X-X-X-X-X-X
01-01-01-01-01-01
%c%c%c%c%c%c.exe


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):

    %original file name%.exe:1592
    regedit.exe:452

  2. Delete the original Backdoor file.
  3. Delete or disinfect the following files created/modified by the Backdoor:

    C:\RCXB2.tmp (23552 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-1844237615-1960408961-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_75ed9567-aa58-4c8e-a8ea-3cad7c47ab03 (44 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\[email protected] (48 bytes)
    C:\%original file name%.exe.tmp1 (373 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "Netlogon" = "%Documents and Settings%\%current user%\Local Settings\Netlogon.exe"

  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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