Gen.Variant.MSILDrop.9_e2def1591b – Adaware

Dynamic Analysis

Payload

Behaviour	Description
WormAutorun	A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Trojan's file once a user opens a drive's folder in Windows Explorer.

Process activity

The Trojan creates the following process(es):

%original file name%.exe:1792

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

%original file name%.exe:2956

Mutexes

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

File activity

The process %original file name%.exe:2956 makes changes in the file system.

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

C:\Windows\System32\drivers\etc\hosts (120 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\errorchecker.txt (8 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\MSASCui.exe (673 bytes)

Registry activity

The process %original file name%.exe:2956 makes changes in the system registry.

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

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]
"Windows Defender" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\MSASCui.exe"

Dropped PE files

There are no dropped PE files.

HOSTS file anomalies

The Trojan modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 120 bytes in size. The following strings are added to the hosts file listed below:

127.0.0.1	74.53.201.162
127.0.0.1	66.66.132.220.30
127.0.0.1	66.35.241.92
127.0.0.1	94.23.199.60

Rootkit activity

No anomalies have been detected.

Propagation

A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Trojan's file once a user opens a drive's folder in Windows Explorer.

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:1792
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
C:\Windows\System32\drivers\etc\hosts (120 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\errorchecker.txt (8 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\MSASCui.exe (673 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Windows Defender" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\MSASCui.exe"
Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name:
Product Name:
Product Version:
Legal Copyright:
Legal Trademarks:
Original Filename:
Internal Name:
File Version:
File Description:
Comments:
Language: Language Neutral

Company Name: Product Name: Product Version: Legal Copyright: Legal Trademarks: Original Filename: Internal Name: File Version: File Description: Comments: Language: Language Neutral

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	54708	54784	4.15879	b437937a3f64a4421f52d38bc19e458d
.rsrc	65536	79380	79872	5.52285	b21838d515898380cebe7a4b96df2dbc
.reloc	147456	12	512	0.056519	59c3604ecede181673268c214e6a6c89

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Total found: 3
25df01e07564849f04bf4074b994d04a
3437b1300ddf77d3511f915f7721f9c8
5467b1b4dc1ae6f02793446173c3bd0c

Network Activity

URLs

URL	IP
teredo.ipv6.microsoft.com	157.56.106.189
dns.msftncsi.com	131.107.255.255

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_2956:

.text

`.sdata

.rsrc

@.reloc

lSystem.Resources.ResourceReader, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089#System.Resources.RuntimeResourceSet

v2.0.50727

Microsoft.VisualBasic

Syslogger_Stub.My

MyWebServices

SQLiteDataTypes

Keyboard

KeyStructure

CMSNMessengerPasswords

MSNPass

CMSNMessengerPassword

Syslogger_Stub.My.Resources

SQLiteHandler

sqlite_master_entry

Microsoft.VisualBasic.ApplicationServices

WindowsFormsApplicationBase

.ctor

Microsoft.VisualBasic.Devices

.cctor

get_WebServices

m_MyWebServicesObjectProvider

WebServices

System.Windows.Forms

System.Collections

loadCerts

System.Text

GetProcessHeap

sqlite3_open

sqlite3_close

sqlite3_exec

sqlite3_errmsg

sqlite3_prepare_v2

sqlite3_step

sqlite3_column_count

sqlite3_column_name

sqlite3_column_type

sqlite3_column_int

sqlite3_column_double

sqlite3_column_text

sqlite3_column_blob

sqlite3_column_table_name

sqlite3_finalize

SQL_OK

SQL_ROW

SQL_DONE

System.Data

System.ComponentModel

smtp

port

ftpuser

ftppass

ftpurl

ftpst

DeleteMozillaCookies

DeleteMozillaSignons

user32.dll

AntiKeyscrambler

SetWindowsHookEx

KeyDelegate

SetWindowsHookExA

UnhookWindowsHookEx

Keys

System.Collections.Generic

HKEY_CURRENT_USER

KEY_QUERY_VALUE

KEY_ENUMERATE_SUB_KEYS

KEY_NOTIFY

KEY_SET_VALUE

KEY_CREATE_SUB_KEY

KEY_READ

KEY_WRITE

kernel32.dll

advapi32.dll

crypt32.dll

RegOpenKeyEx

hKey

lpSubKey

RegOpenKeyExA

RegEnumKeyEx

RegEnumKeyExA

RegCloseKey

shell32.dll

msidcrl.dll

PassportFreeMemory

m_MSNPass

getMSN75Passwords

DOMAIN_PASSWORD

DOMAIN_CERTIFICATE

DOMAIN_VISIBLE_PASSWORD

lpstrKeyword

strLogin

strPass

m_szLogin

m_szPassword

szLogin

szPassword

get_Password

get_Login

Password

Login

System.Resources

System.Globalization

System.Configuration

opera_salt

key_size

sUrlTemp

sPassTemp

sUrl

sPass

lasturl

LoginData

SQLDataTypeSize

sql_statement

System.CodeDom.Compiler

System.Diagnostics

Microsoft.VisualBasic.CompilerServices

System.ComponentModel.Design

HelpKeywordAttribute

System.Reflection

ContainsKey

InvalidOperationException

System.Runtime.CompilerServices

System.Runtime.InteropServices

System.IO

DllImportAttribute

Crypt32.dll

System.Threading

System.Text.RegularExpressions

mozsqlite3

System.Drawing

get_ExecutablePath

MsgBoxResult

MsgBoxStyle

MsgBox

System.Net.Mail

SmtpClient

System.Net

set_Port

Operators

FtpWebRequest

WebRequest

Microsoft.Win32

Microsoft.VisualBasic.MyServices

System.Collections.ObjectModel

Microsoft.VisualBasic.FileIO

System.Security.Cryptography

set_Key

RegistryKey

OpenSubKey

GetExecutingAssembly

IsKeyLocked

get_ModifierKeys

Syslogger Stub.exe

Syslogger_Stub.Resources.resources

Syslogger_Stub.Form1.resources

8.0.0.0

My.Application

My.Forms

My.Computer

My.WebServices

My.User

System.Windows.Forms.Form

My.MyProject.Forms

4System.Web.Services.Protocols.SoapHttpClientProtocol

3System.Resources.Tools.StronglyTypedResourceBuilder

4.0.0.0

KMicrosoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator

10.0.0.0

My.Settings

4.3.2.1

$92cfe5a8-c556-4a58-8735-4e19116a1afa

_CorExeMain

mscoree.dll

C:\Users\Public\Documents\Visual Studio 2010\Projects\SysLogger Stub\SysLogger Stub\obj\x86\Release\Syslogger Stub.pdb

\Google\Chrome\User Data\Default\Login Data

logins

origin_url

password_value

|----------------------------------------|Google Chrome|--------------------------------------------|

Password:

\Mozilla Firefox\

Password:

Mozilla Firefox

---Firefox---

mozcrt19.dll

nspr4.dll

plc4.dll

plds4.dll

ssutil3.dll

sqlite3.dll

mozsqlite3.dll

nssutil3.dll

softokn3.dll

nss3.dll

PK11_GetInternalKeySlot

SELECT name FROM sqlite_master WHERE type IN (

System.Int32

System.Single

System.String

icheck.txt

st.txt

stcheck.txt

|-----------------------------------|Windows Live Messenger|-----------------------------------|

Login:

127.0.0.1 74.53.201.162

127.0.0.1 66.66.132.220.30

127.0.0.1 66.35.241.92

127.0.0.1 94.23.199.60

\Steam\config\SteamAppData.vdf

HKEY_LOCAL_MACHINE\SOFTWARE\Valve\Steam

ClientRegistry.blob

%Documents and Settings%\All Users\Start Menu\Programs\Startup\MSASCui.exe

Windows Defender

MSASCui.exe

errorchecker.txt

\Mozilla\Firefox\Profiles

svchost.exe

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced

HDDFile.com

autorun.inf

shellexecute=

Software\Microsoft\Windows\CurrentVersion\Run

keyscrambler

npfmsg

lo.txt

\MSN Messenger\msidcrl.dll

ps:password

PasswordMSN Messenger Service

Password.NET Messenger Service

User.NET Messenger Service

Passport.Net\*

82BD0E67-9FEA-4748-8672-D5EFE5B779B0

Syslogger_Stub.Resources

\Opera\Opera\wand.dat

\Opera\Opera\profile\wand.dat

hXXp://

hXXps://

PTF://

---Opera---

SQLite format 3

Not a valid SQLite 3 Database File

Auto-vacuum capable database is not supported

No supported Schema layer file-format

1.2.3.4

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps