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TROJ_INNO.AG

June 21, 2013
 ALIASES:

Trojan.ADH (Symantec); ARC:Inno, ARC:[data0001]:CHM (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

1,208,248 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

22 Jun 2012

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan creates the following folders:

  • %User Temp%\is-AN5EP.tmp
  • %User Temp%\is-7LV67.tmp
  • %User Temp%\is-7LV67.tmp\_isetup
  • %Program Files%\Sanmaxi Sim Card Data Recovery
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

Other System Modifications

This Trojan deletes the following files:

  • %Program Files%\Sanmaxi Sim Card Data Recovery\SimRecoverer.exe
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.pif
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.url
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.pif
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.url

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Inno Setup: Setup Version = "5.2.3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Inno Setup: App Path = "%Program Files%\Sanmaxi Sim Card Data Recovery"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
InstallLocation = "%Program Files%\Sanmaxi Sim Card Data Recovery"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Inno Setup: Icon Group = "Sanmaxi Sim Card Data Recovery"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Inno Setup: User = "Administrator"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Inno Setup: Deselected Tasks = "desktopicon,quicklaunchicon"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
DisplayName = "Sanmaxi Sim Card Data Recovery 5.0.1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
UninstallString = "%Program Files%\Sanmaxi Sim Card Data Recovery\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
QuietUninstallString = "%Program Files%\Sanmaxi Sim Card Data Recovery\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
Publisher = "Sanmaxi It Solutions Pvt. Ltd."

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
URLInfoAbout = "http://www.{BLOCKED}i.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
HelpLink = "http://www.{BLOCKED}i.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
URLUpdateInfo = "http://www.{BLOCKED}i.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
InstallDate = "20120609"

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\is-an5ep.tmp\{malware file name}.tmp
  • %User Temp%\is-7LV67.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-7LV67.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Sanmaxi Sim Card Data Recovery\unins000.dat
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-1SIRN.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-JDD2I.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-QJFD1.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-NRVAK.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-AACCS.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-MS8VC.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-TM804.tmp
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.lnk
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.lnk

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • {F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Inno Setup: Setup Version = "5.2.3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Inno Setup: App Path = "%Program Files%\Sanmaxi Sim Card Data Recovery"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • InstallLocation = "%Program Files%\Sanmaxi Sim Card Data Recovery"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Inno Setup: Icon Group = "Sanmaxi Sim Card Data Recovery"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Inno Setup: User = "Administrator"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Inno Setup: Deselected Tasks = "desktopicon,quicklaunchicon"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • DisplayName = "Sanmaxi Sim Card Data Recovery 5.0.1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • UninstallString = "%Program Files%\Sanmaxi Sim Card Data Recovery\unins000.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • QuietUninstallString = "%Program Files%\Sanmaxi Sim Card Data Recovery\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • Publisher = "Sanmaxi It Solutions Pvt. Ltd."
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • URLInfoAbout = "http://www.{BLOCKED}i.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • HelpLink = "http://www.{BLOCKED}i.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • URLUpdateInfo = "http://www.{BLOCKED}i.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1
    • InstallDate = "20120609"

Step 4

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\is-an5ep.tmp\{malware file name}.tmp
  • %User Temp%\is-7LV67.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-7LV67.tmp\_isetup\_shfoldr.dll
  • %Program Files%\Sanmaxi Sim Card Data Recovery\unins000.dat
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-1SIRN.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-JDD2I.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-QJFD1.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-NRVAK.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-AACCS.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-MS8VC.tmp
  • %Program Files%\Sanmaxi Sim Card Data Recovery\is-TM804.tmp
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.lnk
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.lnk

Step 5

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %User Temp%\is-AN5EP.tmp
  • %User Temp%\is-7LV67.tmp
  • %User Temp%\is-7LV67.tmp\_isetup
  • %Program Files%\Sanmaxi Sim Card Data Recovery
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery

Step 6

Scan your computer with your Trend Micro product to delete files detected as TROJ_INNO.AG. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Program Files%\Sanmaxi Sim Card Data Recovery\SimRecoverer.exe
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.pif
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Sanmaxi Sim Card Data Recovery.url
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.pif
  • %Start Menu%\Programs\Sanmaxi Sim Card Data Recovery\Uninstall Sanmaxi Sim Card Data Recovery.url

Step 8

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • {F73D8DB0-BEA9-4F63-847A-3B3300C2C9F2}_is1


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