MemScan.Trojan.Generic.1808384_272e86665f – Adaware

Dynamic Analysis

Payload

Behaviour	Description
IRCBot	A bot can communicate with command and control servers via IRC channel.
MSNWorm	A worm can spread its copies through the MSN Messanger.

Process activity

The MemScan creates the following process(es):

msn.exe:1992
%original file name%.exe:660

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

msn.exe:164

Mutexes

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

File activity

The process msn.exe:164 makes changes in the file system.

The MemScan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%WinDir%\msnmsgrs.exe (36 bytes)
%Documents and Settings%\%current user%\Local Settings\History\History.IE5\desktop.ini (159 bytes)

The process %original file name%.exe:660 makes changes in the file system.

The MemScan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\msn.exe (1568 bytes)

The MemScan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\msn.exe (0 bytes)

Registry activity

The process msn.exe:164 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "D4 5E 80 B5 E2 09 0B 3C 76 C8 12 AB 89 7C 64 E5"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"History" = "%Documents and Settings%\%current user%\Local Settings\History"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

To automatically run itself each time Windows is booted, the MemScan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows UDP Control Center" = "msnmsgrs.exe"

The process %original file name%.exe:660 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "00 76 8E C6 21 ED 84 FE D5 07 13 B3 E4 07 63 4F"

To automatically run itself each time Windows is booted, the MemScan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"

The MemScan deletes the following value(s) in system registry:

The MemScan disables automatic startup of the application by deleting the following autorun value:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0"

Dropped PE files

MD5	File path
621ae49aaf1107ee62d6664ae8d25500	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\IXP000.TMP\msn.exe
621ae49aaf1107ee62d6664ae8d25500	c:\WINDOWS\msnmsgrs.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

A worm can spread its copies through the MSN Messanger.

Removals

Remove it with Ad-Aware

Click (here) to download and install Ad-Aware Free Antivirus.
Update the definition files.
Run a full scan of your computer.

Manual removal*

Terminate malicious process(es) (How to End a Process With the Task Manager):
msn.exe:1992
%original file name%.exe:660
Delete the original MemScan file.
Delete or disinfect the following files created/modified by the MemScan:
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
%WinDir%\msnmsgrs.exe (36 bytes)
%Documents and Settings%\%current user%\Local Settings\History\History.IE5\desktop.ini (159 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\IXP000.TMP\msn.exe (1568 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"Windows UDP Control Center" = "msnmsgrs.exe"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe %System%\advpack.dll,DelNodeRunDLL32 C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp\IXP000.TMP\"
Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

VersionInfo

Company Name: Microsoft Corporation
Product Name: HD Player
Product Version: 6.00.2900.5512
Legal Copyright: (c) Microsoft Corporation. All rights reserved.
Legal Trademarks:
Original Filename: WEXTRACT.EXE
Internal Name: Wextract
File Version: 6.00.2900.5512 (xpsp.080413-2105)
File Description: Win32 Cabinet Self-Extractor
Comments:
Language: Language Neutral

Company Name: Microsoft CorporationProduct Name: HD Player Product Version: 6.00.2900.5512Legal Copyright: (c) Microsoft Corporation. All rights reserved.Legal Trademarks: Original Filename: WEXTRACT.EXE Internal Name: Wextract File Version: 6.00.2900.5512 (xpsp.080413-2105)File Description: Win32 Cabinet Self-Extractor Comments: Language: Language Neutral

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	39368	39424	4.54066	d7ec4e821055e2e5c09f4ea981460a21
.data	45056	7140	7168	0.633989	400007384245a392360f4d3963c86e82
.rsrc	53248	57344	57344	4.72383	87201710e59918031a9e26a4f838b7c9
.idata	110592	3072	3072	3.29984	99f5c7e8dc473e54793b0f0fbc2d6c99

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

msn.exe_164:

.text

`.rdata

@.data

t1SSSSh

SSShp

r.getfile

r.new

r.update

r.upd4te

login

msn.msg

msn.stop

aim.msg

aim.stop

triton.msg

triton.stop

GetWindowsDirectoryA

KERNEL32.dll

VkKeyScanA

keybd_event

USER32.dll

MSVCRT.dll

_acmdln

RegCloseKey

RegCreateKeyExA

ADVAPI32.dll

ole32.dll

OLEAUT32.dll

%s Welcome.

%s Fail.

%s Spy: %s!%s@%s (PM: "%s")

%s Fail by: %s!%s@%s (Pass Tried: %s)

%s %s out.

%s out.

%s No user at:

%s Invalid slot:

%s Kill: threads

%s No threads

%s Killed thread:

%s Failed kt:

%s %s already running: .

%s Fail start %s, err: .

%s Status: %s. Box Uptime: %s, Bot Uptime: %s, Connected for: %s.

%s Bot installed on: %s.

Go fuck yourself %s.

MSN// Message & Zipfile sent to: %d contacts.

MSN// Message sent to: %d Contacts.

MSN// Sent Stats - Messages: %d :: Files: %d :: Message & Files: %d.

%s logged in.

Removed by: %s!%s@%s

%s Advapi.dll Failed

%s PStore.dll Failed.

%s Naim thd.

%s RuC.

%s mis param.

%s Failed to parse command.

%s Downloading URL: %s to: %s.

%s Downloading update from: %s to: %s.

%seraseme_%d%d%d%d%d.exe

%s Thread Disabled.

%s Thread Activated: Sending Message.

%s Bad URL or DNS Error, error:

%s Update failed: Error executing file: %s.

%s Process Finished: "%s", Total Running Time: %s.

%s Created process: "%s", PID:

%s Failed to create process: "%s", error:

%s Couldn't parse path, error:

%s File download: %.1fKB to: %s @ %.1fKB/sec.

%s Couldn't open file for writing: %s.

Ping Timeout? (%d-%d)%d/%d

USER %s * 0 :%s

NICK %s

PASS %s

QUIT %s

PONG %s

NICK

PRIVMSG

JOIN

PRIVMSG %s :%s

JOIN %s

JOIN %s %s

MODE %s %s %s

MODE %s %s

__oxFrame.class__

shlwapi.dll

psapi.dll

SQLDisconnect

SQLFreeHandle

SQLAllocHandle

SQLExecDirect

SQLSetEnvAttr

SQLDriverConnect

odbc32.dll

ShellExecuteA

shell32.dll

mpr.dll

GetUdpTable

GetTcpTable

iphlpapi.dll

dnsapi.dll

netapi32.dll

Mozilla/4.0 (compatible)

InternetCrackUrlA

InternetOpenUrlA

FtpPutFileA

FtpGetFileA

HttpSendRequestA

HttpOpenRequestA

wininet.dll

ws2_32.dll

RegEnumKeyExA

advapi32.dll

user32.dll

kernel32.dll

%s!%s@%s

msnmsgrs.exe

*!*@fbi.gov

Windows UDP Control Center

next.hi5photos.mobi

Windows Microsoft Viewer

SOFTWARE\Microsoft\Windows\CurrentVersion\Run\

%s\%s

%s No %s thread found.

%s %s thread stopped. (%d thread(s) stopped.)

del "%s">nul

if exist "%s" goto Repeat

ping 0.0.0.0>nul

%s\removeMe%i%i%i%i.bat

msn.exe_164_rwx_00400000_0004C000: