Gen.Variant.Kazy.290327_3073401d67

by malwarelabrobot on December 17th, 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: 3073401d6703075be3106889defa1bc1
SHA1: 5bce7e699a457d45e4910803cf4943941fa3fab3
SHA256: 91953f5b2bc28b1382af309e67baaa16c28bef218983e05906b19d1c36ff9f50
SSDeep: 384:FvNp5vAfezacW oosl/PucgFWUR0 gKSHI2lLgyXADROMzx1iQQy7kQ81PHv:F1G3wsZoXhaj0yQlzmQQwk7n
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):

%original file name%.exe:1860
regedit.exe:664

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

svchost.exe:1844

Mutexes

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

File activity

The process %original file name%.exe:1860 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%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 (1257 bytes)

Registry activity

The process %original file name%.exe:1860 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8C E2 65 FC BF 6E 90 C5 B4 96 15 84 EE 7A 49 1F"

The process regedit.exe:664 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0B CC BA 8C 92 E5 E1 B7 6B E4 17 D7 29 C8 37 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]
"NetDDE" = "%Documents and Settings%\%current user%\Local Settings\NetDDE.exe"

Dropped PE files

MD5 File path
c9bba4dca05019c1c55fe2f81b0f3add c:\Documents and Settings\"%CurrentUserName%"\Local Settings\NetDDE.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: Language Neutral

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 22760 23040 5.09173 6a4ec2c9946ec0569c83bf68123497db
.rdata 28672 996 1024 3.17402 d214cdade079311d21d114ce97e26661
.data 32768 931 512 2.46621 d706a401807c81522ffe3818e2f3e426
.rsrc 36864 1136 1536 1.84173 b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 1
ca9261147dfd123200a07f3f4cd8f9c5

URLs

URL IP
hxxp://www.gov.toh.info/julei.php?id=009023111D306EDCD1 211.234.117.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET TROJAN Taidoor Checkin
ET TROJAN Hiloti Style GET to PHP with invalid terse MSIE headers

Traffic

GET /julei.php?id=009023111D306EDCD1 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: Wed, 17 Dec 2014 02:44:23 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 /ju
lei.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_1844:

.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_1844_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):

    %original file name%.exe:1860
    regedit.exe:664

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

    %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 (1257 bytes)

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

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