Gen.Variant.Zusy.199421_97ac9fe88d – 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:2936

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

svchost.exe:1784

Mutexes

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

File activity

The process %original file name%.exe:2936 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\%original file name%.exe (2105 bytes)

Registry activity

The process %original file name%.exe:2936 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\RunOnce]
"Aj7IlyiqVj3xkitP" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\%original file name%.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 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:2936
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\%original file name%.exe (2105 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce]
"Aj7IlyiqVj3xkitP" = "C:\Users\"%CurrentUserName%"\AppData\Local\Temp\%original file name%.exe"
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: 1.1.23.00
Legal Copyright:
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 1.1.23.00
File Description:
Comments:
Language: English (United States)

Company Name: Product Name: Product Version: 1.1.23.00Legal Copyright: Legal Trademarks: Original Filename: Internal Name: File Version: 1.1.23.00File Description: Comments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.MPRESS1	4096	925696	335872	5.54477	77107171c39e07e95efeb6fc4e3ebd6f
.MPRESS2	929792	3656	4096	3.887	1b348d1b2fe61a513f7e48b729678eb3
.rsrc	933888	7560	7680	3.77508	66f1091e31786183f208c9c000f92d88

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

svchost.exe_1784:

.text

`.rsrc

@.reloc

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

v2.0.50727

DRSTUB.exe

Microsoft.VisualBasic

System.Windows.Forms

System.Drawing

avicap32.dll

user32.dll

kernel32.dll

DRSTUB.Resources.resources

DRSTUB.My

Microsoft.VisualBasic.ApplicationServices

.ctor

System.Diagnostics

System.ComponentModel

System.CodeDom.Compiler

Microsoft.VisualBasic.Devices

.cctor

get_WebServices

HelpKeywordAttribute

System.ComponentModel.Design

Microsoft.VisualBasic.CompilerServices

MyWebServices

System.Runtime.CompilerServices

System.Runtime.InteropServices

System.IO

System.Net.Sockets

RegistryKey

Microsoft.Win32

Operators

GetKey

System.Collections

ProcessWindowStyle

WebClient

System.Net

System.Threading

CopyPixelOperation

System.Drawing.Imaging

System.Reflection

TcpClient

System.Text

System.IO.Compression

System.Collections.Generic

OperatingSystem

Microsoft.VisualBasic.MyServices

get_ExecutablePath

wolf_usb_exe

GetKeyboardLayout

GetAsyncKeyState

vKey

MapVirtualKey

GetKeyboardState

lpKeyState

Keys

wVirtKey

Keyboard

GetExecutingAssembly

OpenSubKey

DRSTUB.My.Resources

System.Globalization

System.Resources

System.Configuration

8.0.0.0

My.WebServices

My.User

My.Application

My.Computer

4System.Web.Services.Protocols.SoapHttpClientProtocol

3System.Resources.Tools.StronglyTypedResourceBuilder

4.0.0.0

KMicrosoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator

11.0.0.0

My.Settings

1.0.0.0

$721aff54-84bf-4dd4-9947-d32d266b77f6

_CorExeMain

mscoree.dll

If you want to change the Windows User Account Control level replace the

requestedExecutionLevel node with one of the following.

Specifying requestedExecutionLevel node will disable file and registry virtualization.

compatibility then delete the requestedExecutionLevel node.

Windows will automatically select the most compatible environment.-->

name="Microsoft.Windows.Common-Controls"

version="6.0.0.0"

publicKeyToken="6595b64144ccf1df"

cmd.exe

UseShellExecute

WindowStyle

GetSubKeyNames

CreateSubKey

DeleteSubKeyTree

DeleteSubKey

cmd.exe /k ping 0 & del "

Windows

autorun.inf

install.exe

%System%\dllcache

%System%\dllcache\recycled.exe

%System%\dllcache\myporn.scr

%System%\dllcache\doc.pif

C:\windows\system32\drivers\svchost.exe

ShellExecute=install.exe

shell\open\command=install.exe

shell\explore\command=install.exe

shell\Open\command=install.exe

C:\windows\system32\winlogon.scr

desktop.ini

[.ShellClassInfo]

CLSID={645FF040-5081-101B-9F08-00AA002F954E}

0.7.1

Prozone.exe

127.0.0.1

Software\Microsoft\Windows\CurrentVersion\Run

??/??/??

ShiftKeyDown

WScript.Shell

&explorer /root,"Ã%

DRSTUB.Resources

svchost.exe_1784_rwx_00400000_00014000: