Threat Database Trojans Trojan.MSIL.Dropper.AO

Trojan.MSIL.Dropper.AO

By CagedTech in Trojans

Threat Scorecard

Popularity Rank: 4,739
Threat Level: 80 % (High)
Infected Computers: 1,881
First Seen: February 10, 2022
Last Seen: July 14, 2026
OS(es) Affected: Windows

The detection of Trojan.MSIL.Dropper.AO on your system indicates a potential security threat. This type of malware is designed to infiltrate your computer and cause harm, making it essential to understand its characteristics and take immediate action to remove it. In this report, we will provide you with an overview of Trojan.MSIL.Dropper.AO, its operating methods, symptoms of infection, and a step-by-step guide on how to remove it from your system.

What Is Trojan.MSIL.Dropper.AO?

Trojan.MSIL.Dropper.AO is a type of Trojan horse malware that can be used to deliver various types of malicious payloads to a compromised system. The name "Trojan" refers to the fact that this malware disguises itself as a legitimate program, allowing it to evade detection and gain access to your system. The "MSIL" part of the name suggests that the malware is written in Microsoft Intermediate Language, which is a platform-agnostic language used by the .NET Framework. The "Dropper" component indicates that this malware is designed to drop or install additional malicious components on the infected system.

How Trojan.MSIL.Dropper.AO Operates

Trojan.MSIL.Dropper.AO operates by exploiting vulnerabilities in your system's security to gain access and establish a foothold. Once inside, it can download and install additional malware components, allowing it to perform a variety of malicious activities, such as data theft, spyware, ransomware, or other types of cyber attacks. This malware can also create backdoors, allowing remote access to your system, and can even recruit your computer into a botnet, a network of compromised machines used for malicious purposes.

Symptoms of Infection

The symptoms of a Trojan.MSIL.Dropper.AO infection can vary, but common signs include unusual system behavior, such as slow performance, crashes, or freezes. You may also notice unfamiliar programs or icons on your desktop, or suspicious network activity. Additionally, you may receive alerts from your security software or notice that your system is behaving erratically, such as displaying unusual error messages or pop-ups.

  • Unexplained changes to your system settings or configuration
  • New, unfamiliar programs or toolbars installed on your system
  • Increased network activity, even when you're not using your computer
  • System crashes or freezes, especially when running security software

How to Remove Trojan.MSIL.Dropper.AO

  1. Boot your system in Safe Mode with Networking to prevent the malware from loading and to allow you to download and install removal tools
  2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all malicious components
  3. Uninstall any suspicious programs or applications that you don't recognize or that were installed without your knowledge
  4. Reset your web browsers, including Chrome, Firefox, and Edge, to their default settings to remove any malicious extensions or add-ons
  5. Reboot your system and perform another full scan to ensure that all malicious components have been removed

Conclusion

Removing Trojan.MSIL.Dropper.AO from your system requires careful attention to detail and a thorough understanding of the malware's operating methods. By following the steps outlined in this report, you can help to ensure that your system is clean and free from infection. Remember to always use reputable security software and to keep your operating system and applications up to date to prevent future infections. Additionally, be cautious when downloading and installing software, and avoid opening suspicious emails or attachments to minimize the risk of malware infections.

Analysis Report

General information

Family Name: Trojan.MSIL.Dropper.AO
Signature status: No Signature

Known Samples

MD5: d9aa303865ad9869c0cd2ae3a746b307
SHA1: fdc8028e95f7c3f1172c6c280b4d7fb30a402c27
File Size: 4.52 MB, 4524032 bytes
MD5: dacc5620a54f0af5b10a278fe5f113f0
SHA1: 5b3f098c72768301951d7fb7294ed8f9b445a74a
SHA256: F1529427ED7DD6604F72F6FCFCC357485401FFA1E9C0E8F9CFCC49F8F7448F7E
File Size: 4.50 MB, 4501504 bytes
MD5: 3dbecef27eda9885b2504b60b1480bd8
SHA1: a3ef3cfed377ebc2e1bf61df389d8649e7ecc7a4
SHA256: 58A8BB5BC8AC764110AE56D5C1A7157E28AE7BA8D9032678DDD8F3C19A2B953C
File Size: 3.90 MB, 3904000 bytes
MD5: 8f40eaabc4aaa52d054128ec0d744539
SHA1: b054f207a8152ff321512a50e2d30179c74e42a6
SHA256: F80125E014BCA2BF978899D2CD9D2D1B3CE15E50113FAB6CEC74B78DB2D6DED0
File Size: 4.99 MB, 4990976 bytes
MD5: d633dfccde3ba8a86ec2bd550249a50e
SHA1: 9b55df1f5ce40ed4e21b86eced54d626a6803633
SHA256: F53B218533E43EFB68A099556C2F689C0068C9EF0A2F11DA6D4F98F00DC2B69C
File Size: 4.71 MB, 4708864 bytes
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MD5: c33bdb36aa76c2f3ef10ff6254e8097f
SHA1: 3e45a9b479cf93814973524cad5e75e41bf168bc
SHA256: D259482FDD6963C848BC7A22771B4F4C120A12FB97F202DA1F9F019BD3793EAE
File Size: 3.94 MB, 3937280 bytes

Windows Portable Executable Attributes

  • File doesn't have "Rich" header
  • File doesn't have debug information
  • File doesn't have exports table
  • File doesn't have security information
  • File has TLS information
  • File is .NET application
  • File is 32-bit executable
  • File is either console or GUI application
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
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  • File is not packed
  • IMAGE_FILE_DLL is not set inside PE header (Executable)
  • IMAGE_FILE_EXECUTABLE_IMAGE is set inside PE header (Executable Image)

File Icons

Windows PE Version Information

Name Value
Assembly Version 2.13.3.25913
Company Name
  • Autocom Diagnostic Partner AB
  • Synaptics
File Description
  • Main
  • Synaptics Pointing Device Driver
File Version
  • 2.13.3.0
  • 1.0.0.4
Internal Name Main.exe
Legal Copyright Copyright © 2013
Original Filename Main.exe
Product Name
  • ANPCS
  • Synaptics Pointing Device Driver
Product Version
  • 2.13.3.0
  • 1.0.0.0

File Traits

  • .NET
  • dll
  • SmartAssembly
  • x86

Block Information

Total Blocks: 6,781
Potentially Malicious Blocks: 640
Whitelisted Blocks: 2,629
Unknown Blocks: 3,512

Visual Map

? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? 0 ? ? ? 0 x x x x x x ? x x 0 ? 0 ? 0 0 ? ? ? ? ? ? ? 0 ? ? ? x ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? 0 ? ? ? 0 ? ? 0 x ? ? 0 ? x ? x ? ? ? ? ? ? 0 0 0 0 ? ? ? 0 0 0 ? ? ? 0 0 ? ? ? x 0 ? 0 ? 0 ? ? ? ? ? ? ? 0 ? 0 0 0 0 0 ? ? ? ? ? 0 ? ? 0 ? 0 ? ? ? ? 0 ? ? ? 0 0 ? ? ? 0 ? ? ? ? ? ? ? ? 0 0 ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 0 ? ? ? ? ? 0 0 0 0 0 ? 0 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 ? ? ? ? ? ? ? ? ? ? ? ? ? x ? ? ? ? ? ? ? ? ? x ? 0 ? 0 0 0 0 ? 0 0 0 0 0 0 0 0 0 0 ? 0 0 ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? 0 ? ? ? ? 0 x ? x ? ? 0 ? ? ? ? ? 0 x ? 0 ? ? 0 ? ? ? ? 0 ? ? ? ? ? ? ? 0 ? ? ? ? ? 0 ? ? 0 0 ? ? ? ? 0 ? x x x ? ? ? ? 0 ? 0 ? 0 ? 0 ? ? ? ? ? 0 ? 0 0 0 0 ? 0 ? ? ? ? ? 0 ? 0 0 ? ? ? 0 0 ? ? x ? 0 ? 0 0 0 0 ? x x ? ? ? ? ? ? x ? 0 ? ? 0 0 ? ? 0 x ? x ? x x 0 0 0 ? 0 0 0 0 ? 0 0 ? 0 0 ? ? ? ? ? 0 0 0 x x 0 0 0 0 0 0 0 ? 0 ? 0 0 0 0 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 0 0 0 0 0 0 0 0 0 0 0 0 ? ? ? ? ? ? ? ? ? 0 ? ? 0 0 0 ? 0 0 ? ? ? ? 0 ? 0 ? ? ? ? ? 0 ? ? x ? 0 ? ? ? ? ? 0 ? ? ? ? ? ? ? 0 ? 0 0 0 0 0 0 ? ? 0 ? ? x ? 0 0 0 ? 0 ? ? ? ? 0 ? ? ? ? 0 0 0 0 ? 0 ? ? x ? ? ? ? ? ? ? 0 ? 0 x ? ? ? ? ? 0 ? ? 0 ? ? ? ? 0 0 ? 0 ? 0 0 ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 ? ? x ? 0 x ? ? ? ? ? 0 0 0 0 0 0 ? 0 0 0 0 0 ? 0 ? ? ? ? ? 0 ? 0 0 0 x ? 0 0 0 0 0 0 ? ? ? ? ? ? ? ? ? ? x ? 0 0 0 0 ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 ? 0 ? ? ? ? ? ? ? ? ? 0 0 ? x ? ? ? ? 0 ? ? 0 x ? 0 0 ? 0 ? 0 0 ? ? ? ? x x x 0 0 0 ? ? ? ? ? 0 ? ? 0 0 0 x ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? 0 0 0 0 ? ? x ? 0 0 0 0 0 ? ? ? 0 ? 0 ? 0 ? 0 0 0 0 ? 0 ? ? 0 0 0 ? ? 0 ? ? ? ? 0 ? 0 ? ? 0 ? 0 0 ? 0 ? 0 ? 0 ? ? 0 ? 0 ? ? 0 0 x ? ? ? 0 0 0 0 0 0 0 0 0 0 0 ? x x x x x x x x x x x x 0 0 0 0 ? 0 ? ? ? ? 0 ? 0 ? 0 0 0 0 0 0 0 0 0 0 0 0 ? ? 0 ? 0 0 ? 0 ? ? ? ? ? ? ? ? ? ? 0 ? 0 ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? x ? ? ? 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ? ? ? 0 0 0 0 0 ? ? ? ? 0 ? ? ? ? ? ? ? ? ? 0 0 ? ? ? ? ? ? x ? 0 0 0 0 0 ? 0 ? 0 0 0 0 0 0 0 ? ? 0 ? 0 0 ? ? ? ? ? x ? ? 0 ? ? x ? ? ? ? ? ? ? 0 ? 0 ? 0 ? ? ? ? 0 x ? ? ? ? ? ? ? 0 ? ? ? ? 0 ? 0 ? 0 ? ? 0 ? ? x ? x ? ? ? ? 0 ? 0 ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? x ? ? x ? 0 x x 0 ? ? 0 x ? ? ? x 0 0 0 ? 0 0 ? ? x x ? ? x x ? 0 x ? x ? ? 0 0 x ? 0 0 0 0 x x ? ? ? ? 0 x 0 0 0 0 0 0 0 ? 0 ? ? ? ? 0 ? ? x x x x x x x x x x 0 ? ? 0 ? ? ? ? 0 ? ? ? ? ? ? ? x x ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ? 0 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 x x x x ? ? ? ? ? ? ? ? 0 ? ? 0 0 0 0 0 ? ? ? ? ? ? ? ? ? ? 0 0 ? 0 ? x ? ? ? ? ? 0 ? x x x x x x x x x x 0 x x x 0 0 ? ? 0 ? x ? ? 0 x ? x ? ? ? 0 0 0 ? 0 ? ? 0 ? 0 ? 0 ? ? ? 0 ? ? 0 0 0 0 0 0 0 0 0 0 0 x ? ? ? ? 0 ? ? ? ? ? x 0 ? ? 0 ? ? ? ? ? ? 0 ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? 0 x ? 0 0 0 0 0 ? 0 0 0 0 0 0 ? ? ? ? x ? ? ? ? ? ? 0 ? 0 ? ? ? ? ? ? ? ? ? 0 0 ? ? ? ? 0 ? ? ? 0 x ? x ? 0 ? ? ? ? 0 ? ? ? ? ? ? 0 ? ? ? ? x ? ? ? x ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? x ? ? ? ? 0 ? x ? 0 ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 0 0 0 0 0 0 ? ? ? ? ? ? 0 0 0 ? ? x ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? 0 ? ? ? ? 0 0 0 0 0 0 0 0 0 ? 0 0 0 0 0 0 ? 0 0 0 0 0 0 ? 0 0 0 0 0 0 ? 0 0 0 0 0 0 ? 0 0 0 ? ? 0 0 0 0 0 0 0 0 0 x ? ? 0 ? ? 0 x ? ? 0 ? ? 0 0 ? ? x ? ? ? 0 ? 0 ? ? ? ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0 ? 0 ? ? 0 ? ? x x x 0 0 0 ? x x ? ? x x 0 ? ? ? 0 x ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 0 ? 0 ? ? 0 ? ? 0 ? ? ? 0 ? 0 ? ? 0 ? ? ? 0 ? ? x ? 0 ? 0 0 0 0 0 x ? x ? 0 x ? 0 x 0 0 0 0 0 0 0 0 x x x x x x x x 0 ? x 0 0 0 0 0 x x x x 0 ? 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x ? 0 0 0 0 0 0 0 0 ? ? ? ? 0 ? ? 0 ? ? ? ? ? ? ? ? 0 ? ? ? ? ? ? x ? ? x ? 0 0 ? 0 ? 0 ? ? ? 0 ? ? ? ? ? 0 0 ? ? 0 0 0 ? ? 0 ? 0 ? x x ? 0 0 ? ? ? ? ? ? ? ? ? x ? ? ? ? ? 0 ? ? 0 0 x ? ? ? ? ? ? ? 0 ? 0 0 0 x ? ? ? ? ? ? ? ? ? 0 0 0 ? ? 0 ? ? ? ? ? ? ? ? ? ? ? ? x ? 0 ? ? ? ? ? ? x ? 0 ? 0 0 ? ? ? 0 0 ? 0 0 0 x ? 0 ? 0 0 0 0 ? x x ? ? ? ? ? ? 0 0 0 0 0 0 0 0 0 ? ? ? ? ? ? ? ? 0 0 ? ? ? ? 0 ? ? ? 0 ? ? ? x ? ? ? ? x ? ? ? ? 0 ? 0 0 0 0 0 x ? x ? 0 x ? 0 x 0 0 0 0 0 0 0 0 0 0 0 x x x x x x x x 0 ? x 0 0 0 0 0 x x x x 0 ? 0 0 0 0 0 0 0 0 0 0 0 0 0
... Data truncated
0 - Probable Safe Block
? - Unknown Block
x - Potentially Malicious Block

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Files Modified

File Attributes
\device\namedpipe\gmdasllogger Generic Write,Read Attributes
c:\programdata\synaptics Synchronize,Write Attributes
c:\programdata\synaptics\rcxabcb.tmp Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\programdata\synaptics\synaptics.exe Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete,LEFT 262144
c:\programdata\synaptics\synaptics.exe Synchronize,Write Attributes
c:\programdata\synaptics\synaptics.exe Synchronize,Write Data
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.0.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.1.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\microsoft\windows\usrclass.dat{dba6b5ef-640a-11ed-9bcb-f677369d361c}.txr.2.regtrans-ms Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\temp\jzrf5o6.ini Generic Read,Write Data,Write Attributes,Write extended,Append data
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c:\users\user\appdata\roaming\winsl Synchronize,Write Attributes
c:\users\user\appdata\roaming\winsl\l3\2\2026 Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\downloads\._cache_9b55df1f5ce40ed4e21b86eced54d626a6803633_0004708864 Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\downloads\._cache_9b55df1f5ce40ed4e21b86eced54d626a6803633_0004708864 Synchronize,Write Attributes
c:\windows\appcompat\programs\amcache.hve Read Data,Read Control,Write Data
c:\windows\appcompat\programs\amcache.hve Write Attributes
c:\windows\appcompat\programs\amcache.hve.log1 Read Data,Write Data
c:\windows\appcompat\programs\amcache.hve.log2 Read Data,Write Data

Registry Modifications

Key::Value Data API Name
HKCU\software\microsoft\windows\currentversion\explorer::slowcontextmenuentries `$�!�:i��+00��� Gs]XM���"�2��FXD�':D��exA-��LG=�A��J� �C� RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 -k�8��8tX��B�8 �� �6 �v 5� �Z xy ��T���B�������������5����ee��Bx�< �!wz"Wc#�#��$kF$��%"�%:�%�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9�/��0P%1`1�1HO1�D5�0 RegNtPreCreateKey
HKLM\software\wow6432node\microsoft\windows\currentversion\run::synaptics pointing device driver C:\ProgramData\Synaptics\Synaptics.exe RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::proxybypass  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::intranetname  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::uncasintranet  RegNtPreCreateKey
HKCU\software\microsoft\windows\currentversion\internet settings\zonemap::autodetect RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 .k�8��8tX��B�8 �� �6 �v 5� �Z xy ��T���B�������������5����ee��Bx�< �!wz"Wc#�#��$kF$��%"�%:�%�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9�/��0P%1`1�1HO1�D5�0 RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 ~� % xy* �/��Y�d�kP~� ��ރ�p��^�o���zee,Vs} kP~ ��1���7 ���ﺃee����1��fe��h�n RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 /k8��8tX��B�8 �� �6 �v 5� �Z xy ����T���B�������������5����ee��Bx�< �!wz"Wc#�#��$kF$��%"�%:�%�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9�/��0P%1`1�1HO1�D RegNtPreCreateKey
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HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 0k8��8tX��B�8 �� �6 �v 5� �Z xy ����T���B�������������5����ee��Bx�< �!wz"Wc#�#��$kF$��%"�%:�%�&� &�x(�(X�)�`*J*9*�"*�^*�h+�[,��/9�/��0P%1`1�1HO1�D RegNtPreCreateKey
HKLM\system\software\microsoft\tip\aggregateresults::data 隞̃甁耀꧌ RegNtPreCreateKey

Windows API Usage

Category API
Process Shell Execute
  • CreateProcess
  • ShellExecuteEx
User Data Access
  • GetUserObjectInformation
Anti Debug
  • IsDebuggerPresent
Other Suspicious
  • AdjustTokenPrivileges
Encryption Used
  • BCryptOpenAlgorithmProvider
Process Manipulation Evasion
  • NtUnmapViewOfSection
  • ReadProcessMemory
Service Control
  • OpenSCManager
Network Winsock2
  • WSAStartup
  • WSAttemptAutodialName
Network Winhttp
  • WinHttpOpen
Network Wininet
  • InternetOpen
  • InternetOpenUrl
  • InternetReadFile
Network Winsock
  • bind
  • closesocket
  • gethostbyname
  • getsockname
  • socket

Shell Command Execution

C:\WINDOWS\system32\fondue.exe "C:\WINDOWS\system32\fondue.exe" /enable-feature:NetFx3 /caller-name:mscoreei.dll
C:\Windows\Microsoft.NET\Framework\v2.0.50727\\dw20.exe dw20.exe -x -s 868
C:\Windows\Microsoft.NET\Framework\v2.0.50727\\dw20.exe dw20.exe -x -s 816
runas c:\users\user\downloads\._cache_9b55df1f5ce40ed4e21b86eced54d626a6803633_0004708864
runas C:\ProgramData\Synaptics\Synaptics.exe InjUpdate
Show More
C:\Windows\Microsoft.NET\Framework\v2.0.50727\\dw20.exe dw20.exe -x -s 820

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