Gen.Variant.Kazy.290327_c4d41795cf

by malwarelabrobot on December 18th, 2014 in Malware Descriptions.

Trojan.Win32.Inject.azgw (Kaspersky), Gen:Variant.Kazy.290327 (B) (Emsisoft), Gen:Variant.Kazy.290327 (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: c4d41795cffacdb28f94841acd622f3d
SHA1: aef379ce87004d05e659d93ed40c4bf4750a33df
SHA256: 1463e55b21896721f7d8f3b0dc0e19be7378e21e259347a5a188a9f03646b60c
SSDeep: 384:F xsgz9JdoacWIrVZjucXY4gpxX8PgxSwT3LvJYjIKGShkPHiQy7kQ81 Hv:F8Kt3IbPYpsIHHGjIKzhkPiQwk76
Size: 27136 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2010-12-29 09:37:00
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):

mscorsvw.exe:172
regedit.exe:448
%original file name%.exe:1820

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

svchost.exe:1564

Mutexes

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

File activity

The process %original file name%.exe:1820 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\[email protected] (48 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)
C:\%original file name%.exe.tmp1 (1257 bytes)

Registry activity

The process mscorsvw.exe:172 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\.NETFramework\v2.0.50727\NGenService\State]
"AccumulatedWaitIdleTime" = "1260000"

The process regedit.exe:448 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "E8 55 D2 C0 CB 3F 00 2B 57 36 33 4B C1 A2 BE 34"

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]
"HTTPFilter" = "%Documents and Settings%\%current user%\Local Settings\HTTPFilter.exe"

The process %original file name%.exe:1820 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D2 C2 E0 05 E4 E6 99 CE DF F6 02 93 EA 36 1E D5"

Dropped PE files

MD5 File path
2d08a3c658bfc1f897559986a7fab6d0 c:\Documents and Settings\"%CurrentUserName%"\Local Settings\HTTPFilter.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: Russian (Russia)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 22760 23040 5.09066 3c50840d5a7e3774c5fabf12d639fa2d
.rdata 28672 996 1024 3.17402 d214cdade079311d21d114ce97e26661
.data 32768 931 512 2.46891 85159569691104599b319eba94ccff51
.rsrc 36864 1136 1536 1.84173 b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
52d0b6b72726ce96dffc3fe96ee61137

URLs

URL IP
hxxp://www.gov.toh.info/kkgdv.php?id=018720111D306EDCD1 211.234.117.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /kkgdv.php?id=018720111D306EDCD1 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, 18 Dec 2014 00:15:28 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 /kk
gdv.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_1564:

.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
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_1564_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
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):

    mscorsvw.exe:172
    regedit.exe:448
    %original file name%.exe:1820

  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\Temp\[email protected] (48 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)
    C:\%original file name%.exe.tmp1 (1257 bytes)

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

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