Trojan.Dropper.SWZ_4d09d31642 – 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 Trojan creates the following process(es):

%original file name%.exe:772

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

%original file name%.exe:872

Mutexes

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

File activity

The process %original file name%.exe:872 makes changes in the file system.

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

%WinDir%\fxstaller.exe (35 bytes)

Registry activity

The process %original file name%.exe:872 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "33 0E 4B 7B D9 DD 2A 73 7F 0A 3E EA 2C B1 4F A3"

[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 Trojan adds the following link to its file to the system registry autorun key:

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

Dropped PE files

There are no dropped PE files.

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):
%original file name%.exe:772
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%WinDir%\fxstaller.exe (35 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" = "fxstaller.exe"
Reboot the computer.

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

Static Analysis

VersionInfo

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	1852	2048	4.0341	9e1529c406913e577265e85fa81ca8b4
.rdata	8192	678	1024	2.41749	8de829f5d7b1997127ec3be72e5b0f5c
.data	12288	240	512	1.50231	ee57f991d629977330b8215fa9756f19
.rsrc	16384	2400	2560	1.93996	642ae788e79779139d74e1f71227e13b

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

Strings from Dumps

%original file name%.exe_872:

.text

`.rdata

@.data

t1SSSSh

SSShp

p.jusufii

r.new

r.update

p.princi

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

fxstaller.exe

*!*@pri.gov

Windows UDP Control Center

cufii123.pr1nc.ch

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

%original file name%.exe_872_rwx_00400000_0004C000: