Gen.Variant.Razy.15441_986704315b

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

regedit.exe:1336
%original file name%.exe:1552

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

svchost.exe:912

Mutexes

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

File activity

The process %original file name%.exe:1552 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 (1780 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\4$@2.dat (48 bytes)

Registry activity

The process regedit.exe:1336 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 C0 C1 21 43 04 8C FD CC 00 8C 74 D5 F0 34 14"

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"

The process %original file name%.exe:1552 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "37 1A 5C 0E 6F F1 8C 3D EA 6D A9 F3 A7 37 80 32"

Dropped PE files

MD5	File path
ffe0d1b6229ed79f1c57796de27534c3	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

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):

   regedit.exe:1336
   %original file name%.exe:1552
   

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 (1780 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]
   "NetDDE" = "%Documents and Settings%\%current user%\Local Settings\NetDDE.exe"

5. 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	5.09574	394cbafa0f5d10abc6a083108f28c2ba
.rdata	28672	1028	1536	2.44349	42595f358d82ed008b0da3cc81ff353d
.data	32768	931	512	2.48581	1daf65a46712fc73e75237906142a4ff
.rsrc	36864	1136	1536	1.84173	b5ed7b029bc65184d8f3a398fb854e6d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 3
cabc3e20ca5c92fd266b6041bd49db32
cdd89a3743473b8a51f3f1f5c3345d8a
29f838109a523cbed670796bea145720

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

svchost.exe_912:

.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

211.234.117.132

211.234.117.132

intweb.mobwork.net

intweb.mobwork.net

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