Gen.Variant.Kazy.224568_9148c9546b

by malwarelabrobot on October 3rd, 2014 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Kazy.224722 (B) (Emsisoft), Gen:Variant.Kazy.224568 (AdAware), Backdoor.Win32.Simbot.FD, BackdoorSimbot.YR (Lavasoft MAS)
Behaviour: 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: 9148c9546b0e91f9fae3921fdda34a45
SHA1: 115c12d28352b970fa5bd5ea09ebb4709f297695
SHA256: d130cc3419bc2cf295ac6cd351182a197ca15135ee2d567ae37b6f5557077a02
SSDeep: 384:zHgL99pEcfyL01vNc5PNzXaUk0ty7ee/WxPf3p0roUzuB3a1g:zAJ9PlveFevWxPf rduB3a1g
Size: 20992 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2010-11-06 05:06:34
Analyzed on: WindowsXPESX SP3 32-bit


Summary:

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

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

regedit.exe:1704
%original file name%.exe:1232

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

svchost.exe:1656

Mutexes

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

File activity

The process %original file name%.exe:1232 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

C:\%original file name%.exe.tmp1 (373 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:\RCXB2.tmp (23552 bytes)

The Trojan deletes the following file(s):

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

Registry activity

The process regedit.exe:1704 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3C F6 EC 0F AB 5A 64 DC 0F 56 77 E8 17 4A 64 79"

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

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

The process %original file name%.exe:1232 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "4D 6C BA C4 C7 1D 5D 5B 43 08 78 D2 7B B9 7A B5"

Dropped PE files

MD5 File path
22b8f11557290d4fccde1f9f23026b7f c:\Documents and Settings\"%CurrentUserName%"\Local Settings\xmlprov.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 States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 4392 4608 5.2264 4c0b21583ae74ce65af575592c00a151
.rdata 12288 1045 1536 2.51569 b09e1f7c28fc22c6f6859d92fabdae15
.data 16384 927 512 2.5208 07ae5f90bacb8461f08babb64044989f
.rsrc 20480 12996 13312 5.4256 bd587d41bb7107da59d3fabb36950925

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
1c94786dabb2aac2e22f449fe65d4352

URLs

URL IP
hxxp://www.gov.toh.info/dulom.php?id=005504111D30972847 211.234.117.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /dulom.php?id=005504111D30972847 HTTP/1.1
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
Host: VVV.gov.toh.info
Connection: Keep-Alive
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Thu, 02 Oct 2014 03:33:30 GMT
Server: Apache/2.2.15 (CentOS)
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!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 /du
lom.php was not found on this server.</p>.<hr>.<address
>Apache/2.2.15 (CentOS) Server at VVV.gov.toh.info Port 80</addr
ess>.</body></html>...

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

svchost.exe_1656:

.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
VVV.gov.toh.info
200.115.173.102
200.115.138.136
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_1656_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
VVV.gov.toh.info
200.115.173.102
200.115.138.136
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):

    regedit.exe:1704
    %original file name%.exe:1232

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

    C:\%original file name%.exe.tmp1 (373 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:\RCXB2.tmp (23552 bytes)

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

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