Gen.Variant.Kazy.290327_1a331bef3e

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1956
regedit.exe:928

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

svchost.exe:1376

Mutexes

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

File activity

The process %original file name%.exe:1956 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)
C:\%original file name%.exe.tmp1 (1257 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\4$@2.dat (48 bytes)

Registry activity

The process %original file name%.exe:1956 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "5E B0 69 3F 08 21 14 6F C0 26 E8 9C BC 76 EA 3F"

The process regedit.exe:928 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "73 3D 73 39 6C 79 4F 32 B0 29 43 D2 BD 36 20 2F"

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

Dropped PE files

MD5	File path
c1a7f0dcc0b843b7b68a8663678ddb6c	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\COMSysApp.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

Removals

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:1956
   regedit.exe:928
   

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)
   C:\%original file name%.exe.tmp1 (1257 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\4$@2.dat (48 bytes)

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

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

Static Analysis

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)

Company Name: Adobe Systems, Inc.Product Name: Flash? Player Installer/UninstallerProduct Version: 10,1,53,64Legal Copyright: Copyright ? 1996-2010 Adobe, Inc.Legal Trademarks: Adobe? Flash? PlayerOriginal Filename: FlashUtil.exeInternal Name: Adobe? Flash? Player Installer/Uninstaller 10.1File Version: 10,1,53,64File Description: Adobe? Flash? Player Installer/Uninstaller 10.1 r53Comments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	22760	23040	5.09438	9a68ca6440ba05ee506944300a077933
.rdata	28672	996	1024	3.17402	d214cdade079311d21d114ce97e26661
.data	32768	931	512	2.45369	6b6689171258eb8720eee28720276088
.rsrc	36864	1136	1536	1.84173	b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://211.234.117.178/mnnie.php?id=008382111D309F33E9
hxxp://www.gov.toh.info/mnnie.php?id=008382111D309F33E9

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /mnnie.php?id=008382111D309F33E9 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: Tue, 31 Mar 2015 01:51:23 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><head>.<title>404 Not Found</title>.</head><body>.<h1>Not Found</h1>.<p>The requested URL /mnnie.php was not found on this server.</p>.<hr>.<address>Apache/2.2.15 (CentOS) Server at VVV.gov.toh.info Port 80</address>.</body></html>...

Map

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

Strings from Dumps

svchost.exe_1376:

.text

.text

`.rdata

`.rdata

@.data

@.data

SSh@C@

SSh@C@

MFC42.DLL

MFC42.DLL

MSVCRT.dll

MSVCRT.dll

_acmdln

_acmdln

WinExec

WinExec

KERNEL32.dll

KERNEL32.dll

USER32.dll

USER32.dll

ADVAPI32.dll

ADVAPI32.dll

HttpQueryInfoA

HttpQueryInfoA

InternetOpenUrlA

InternetOpenUrlA

HttpSendRequestA

HttpSendRequestA

HttpOpenRequestA

HttpOpenRequestA

WININET.dll

WININET.dll

WS2_32.dll

WS2_32.dll

iphlpapi.dll

iphlpapi.dll

SHLWAPI.dll

SHLWAPI.dll

VVV.gov.toh.info

VVV.gov.toh.info

200.115.173.102

200.115.173.102

regedit.exe /s

regedit.exe /s

~dfds3.reg

~dfds3.reg

Windows Registry Editor Version 5.00

Windows Registry Editor Version 5.00

"%s"="%s"

"%s"="%s"

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

WinHttp

WinHttp

%s.tmp1

%s.tmp1

4$@2.dat

4$@2.dat

hXXp://%s:%d/%s.php?id=d%s&ext=%s

hXXp://%s:%d/%s.php?id=d%s&ext=%s

/%s.php?id=d%s&ext=%s

/%s.php?id=d%s&ext=%s

hXXp://%s:%d/%s.php?id=d%s

hXXp://%s:%d/%s.php?id=d%s

%c%c%c%c%c

%c%c%c%c%c

/%s.php?id=d%s

/%s.php?id=d%s

%%temp%%\%u

%%temp%%\%u

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)

Content-Type: application/x-www-form-urlencoded

Content-Type: application/x-www-form-urlencoded

HTTP/1.1

HTTP/1.1