Threat Database Trojans Trojan.Installmonstr

Trojan.Installmonstr

By CagedTech in Trojans
Published:
Last updated:

Threat Scorecard

Popularity Rank: 5,618
Threat Level: 80 % (High)
Infected Computers: 81,228
First Seen: June 26, 2014
Last Seen: September 27, 2026
OS(es) Affected: Windows

The detection of Trojan.Installmonstr on your system indicates a potential security threat that requires immediate attention. Trojan horses, like the detected Trojan.Installmonstr, are malicious programs designed to infiltrate and compromise computer systems. Understanding the nature and behavior of this threat is crucial for effective removal and prevention of future infections.

What Is Trojan.Installmonstr?

Trojan horses are a type of malware that disguises itself as legitimate software, allowing it to evade detection and gain unauthorized access to a computer system. The name Trojan.Installmonstr suggests it may be related to installing or downloading malicious components, but without specific details, it's essential to approach removal with a general understanding of Trojan horse behavior. These threats can lead to a variety of malicious activities, including data theft, system compromise, and the installation of additional malware.

How Trojan.Installmonstr Operates

Typically, Trojan horses operate by exploiting vulnerabilities in software or human behavior. They can be distributed through various means, including email attachments, infected software downloads, or compromised websites. Once installed, a Trojan horse can create backdoors for remote access, allowing attackers to control the infected system, steal sensitive information, or use the system for malicious purposes such as spamming or launching attacks on other systems. The specific operations of Trojan.Installmonstr would depend on its design and the intentions of its creators, but the general approach to mitigation remains consistent with other Trojan infections.

Symptoms of Infection

Symptoms of a Trojan horse infection can vary widely, depending on the malware's purpose and design. Common indicators include unexpected system behavior, such as unusual pop-ups, slow system performance, or unfamiliar programs appearing in the system tray or task manager. Sometimes, infections may not exhibit obvious symptoms, making regular system monitoring and antivirus scans crucial for early detection. The presence of Trojan.Installmonstr may or may not be accompanied by noticeable system changes, highlighting the importance of proactive security measures.

How to Remove Trojan.Installmonstr

  1. Boot your system into Safe Mode with Networking to limit the malware's ability to interfere with the removal process.
  2. Perform a full scan of your system using a reputable anti-malware tool, such as SpyHunter, to detect and remove all traces of the malware.
  3. Uninstall any suspicious programs that were installed around the time of the infection. Be cautious and only remove programs you are certain are malicious or unnecessary.
  4. Reset your web browsers (Chrome, Firefox, Edge) to their default settings to remove any malicious extensions or settings changes made by the Trojan.
  5. Reboot your system and perform another full scan to ensure that all components of the malware have been removed. Repeat this process until no more threats are detected.

Conclusion

Removing Trojan.Installmonstr from your system requires a combination of the right tools and careful procedure. By understanding how Trojan horses operate and following a systematic approach to removal, you can effectively eliminate the threat and protect your system from future infections. Regular system updates, use of reputable antivirus software, and cautious behavior online (avoiding suspicious downloads and email attachments) are key to preventing Trojan horse infections. If you are unsure about any part of the removal process, consider seeking help from a professional to ensure your system is thoroughly cleaned and secured.

SpyHunter Detects & Remove Trojan.Installmonstr

File System Details

Trojan.Installmonstr may create the following file(s):
# File Name MD5 Detections
1. excelviewer_setup.exe eb53ee79255c2e94b5c31ea5ddcce7c7 1,000

Analysis Report

General information

Family Name: Trojan.Installmonstr
Signature status: Root Not Trusted

Known Samples

MD5: 74bd5fa0652cedaa90984335d570e941
SHA1: ce736c6d8d9bf44a34cbb2c41960e40dc2d4cf71
SHA256: 80E9726CB733E2660828C416729AB445E0BA55B7024FF16CA892FB6A25C3E3CF
File Size: 3.19 MB, 3188168 bytes
MD5: 970befb365c781f59c5308e67aaa2e6a
SHA1: 726906787c7a2bb35ffe6d3605eba9f1eb43a544
SHA256: 52E1E306BC39EEB05F3C3C94E26C88B901B21E258574244FA2345B4A77BBA2F4
File Size: 1.28 MB, 1281680 bytes
MD5: 2a95d3d07ae8daf422f556cbd4293709
SHA1: 190814ef71d2648798f4ad51051411581df97a7c
SHA256: 60F9D05B2086AF66ADF567B218B6EB16B06D01AC01514C5977C9C918B0BFC140
File Size: 4.80 MB, 4797128 bytes
MD5: e81020fd54ed7561a4a907087b3696b0
SHA1: 8a7e79e584379d0e92348888c037774ce8456ab3
SHA256: 7042CE486BDCE02DB99C08B19FFFC6AF3AA25541C239C58F387D73D07C949E72
File Size: 537.02 KB, 537024 bytes
MD5: 3003e8f1ea15d2b91905a001ce628159
SHA1: a8541bee57c20f690f560ddcaa18a7ccd9011aa0
SHA256: B3A4648059688AD1EBC31AAC116BFF1800E5B031BCFA99F08965CE945CB27A31
File Size: 4.59 MB, 4586664 bytes
Show More
MD5: 271a46c931f42f5c1d01941677ca65af
SHA1: 991affa76bb2f620c120fb4df973e2a72d541fed
SHA256: BBFC55D43959B60ADF7C66915ECBB475A81AF7ED697AD672EA301EEEBF554FA9
File Size: 3.96 MB, 3955288 bytes
MD5: 206fa860356a5393b2f8172e034acede
SHA1: 8112336f8d1a1d67265f6f08274bfae338bccebf
SHA256: D36DD719F728B440D0DAE226C58C51E1576D9CC5EBD42C82BB4FACEA7E146C4A
File Size: 366.89 KB, 366888 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 relocations information
  • File doesn't have security information
  • File has been packed
  • File has exports table
  • File has TLS information
  • File is 32-bit executable
  • File is either console or GUI application
Show More
  • File is GUI application (IMAGE_SUBSYSTEM_WINDOWS_GUI)
  • File is Native application (NOT .NET application)
  • 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
Comments
  • 260.0.0.0
  • This installation was built with Inno Setup.
Company Name
  • Allmyapps
  • Allmyapps SAS
  • Lobanebec
  • Soft company
  • Software company
File Description
  • Allmyapps
  • AppsWatcher
  • Description
  • Fastest file downloader
  • Tesabi Setup
File Version
  • 172.3.4.6627
  • 4.2.3.2
  • 4.2.1.2
  • 2.0.0.30
  • 2.0.0.8
  • 1.5.3.1
  • 1.0.0.0
Internal Name
  • Application downloader
  • GetApplication
  • SfxSetup.exe
Legal Copyright
  • All copyright
  • Copyright
  • Copyright (C) 2011
  • Internet file
  • x1LegalCopyright
Legal Trademarks
  • c2LegalTrademarks
  • Trademark A
  • Trademarks
Original Filename
  • SfxSetup.exe
  • v3OriginalFilename
Product Name
  • Allmyapps
  • AppsWatcher
  • b4ProductName
  • Product1
  • ProductNames
  • Tesabi
Product Version
  • 350.0.0.0
  • 4.6
  • 2.3.1
  • 2.2.1.83
  • 2.0.0.30
  • 2.0.0.8
  • 1.0.0.0

Digital Signatures

Signer Root Status
Bastion Develop, TOV COMODO RSA Code Signing CA Self Signed
INFOKINETIKA COMODO RSA Code Signing CA Self Signed
LLC KOLORIS IT COMODO RSA Code Signing CA Self Signed
Smart Solyushns Kompani, TOV COMODO RSA Code Signing CA Self Signed
Velko Smart, TOV COMODO RSA Code Signing CA Self Signed
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ALLMYAPPS thawte Primary Root CA Root Not Trusted

Block Information

Similar Families

  • Agent.DSS
  • Delf.FC
  • Delf.OF
  • InstallMonstr.B
  • Lumma.SB
Show More
  • Ulise.BE
  • Vadokrist.B

Files Modified

File Attributes
c:\bd69.tmp\appswatcher.bat Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\programdata\appswatcher\appswatcher.bat Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7z0efdf28c\setup_appswatcher_0_1.exe Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7z0efdf28c\setup_appswatcher_0_1.exe Synchronize,Write Attributes
c:\users\user\appdata\local\temp\7z6fffc428\setup.exe Generic Write,Read Attributes
c:\users\user\appdata\local\temp\7z6fffc428\setup.exe Synchronize,Write Attributes
c:\users\user\appdata\local\temp\ama43229.exe Generic Write,Read Attributes
c:\users\user\appdata\local\temp\is-vr2av.tmp\726906787c7a2bb35ffe6d3605eba9f1eb43a544_0001281680.tmp Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef75.tmp Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete
c:\users\user\appdata\local\temp\nsjef76.tmp Synchronize,Write Attributes
Show More
c:\users\user\appdata\local\temp\nsjef76.tmp\dialer.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\dialer.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\inetc.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\inetc.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\newadvsplash.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\newadvsplash.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\registry.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\registry.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\splash-screen.gif Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\splash-screen.gif Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\system.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsjef76.tmp\system.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nspbabb.tmp Generic Read,Write Data,Write Attributes,Write extended,Append data,Delete
c:\users\user\appdata\local\temp\nsubacb.tmp Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\dialer.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\dialer.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\dummy.htm Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\dummy.htm Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\dummy.htm_deleted_ Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\inetc.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\inetc.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\newadvsplash.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\newadvsplash.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\registry.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\registry.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\splash-screen.gif Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\splash-screen.gif Synchronize,Write Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\system.dll Generic Write,Read Attributes
c:\users\user\appdata\local\temp\nsubacb.tmp\system.dll Synchronize,Write Attributes
c:\users\user\appdata\local\temp\~df038abbec56328ff0.tmp Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\local\temp\~df6c69e9172441289b.tmp Generic Read,Write Data,Write Attributes,Write extended,Append data
c:\users\user\appdata\roaming\allmyapps\infos.json Generic Write,Read Attributes
c:\users\user\appdata\roaming\appswatcher\infos.json Generic Write,Read Attributes
c:\users\user\downloads\190814ef71d2648798f4ad51051411581df97a7c_0004797128 Generic Write,Read Attributes
c:\users\user\downloads\a8541bee57c20f690f560ddcaa18a7ccd9011aa0_0004586664 Generic Write,Read Attributes

Registry Modifications

Key::Value Data API Name
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\system\controlset001\control\session manager::pendingfilerenameoperations \??\C:\Users\Yqwusbhc\AppData\Local\Temp\nsjEF76.tmp\newadvsplash.dll RegNtPreCreateKey
HKLM\system\controlset001\control\session manager::pendingfilerenameoperations \??\C:\Users\Yqwusbhc\AppData\Local\Temp\nsjEF76.tmp\newadvsplash.dll\??\C:\Users\Yqwusbhc\AppData\Local\Temp\nsjEF76.tmp\regi RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 1y xykP~�ރ���l��^۴�}��Vs}kP~��1%�����dB  F e�k��1:��h�n�}e��e�� RegNtPreCreateKey
HKLM\system\controlset001\services\bam\state\usersettings\s-1-5-21-3119368278-1123331430-659265220-1001::\device\harddiskvolume2\windows\system32\conhost.exe ႔풉ꢢǜ RegNtPreCreateKey
HKLM\system\controlset001\control\session manager::pendingfilerenameoperations *1\??\C:\Windows\SystemTemp\MicrosoftEdgeUpdate.exe.old5af52*1\??\C:\Windows\SystemTemp\CopilotUpdate.exe.old5af62*1\??\C:\P RegNtPreCreateKey
HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc3475 � xy* �/��Y�d�kP~� ��ރ�p��^�o�ee3Vs}kP~��1.��7 ���ﺃee��� ��1 ��fe��g� RegNtPreCreateKey
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HKLM\software\microsoft\windows nt\currentversion\notifications\data::418a073aa3bc1c75 �j�8��81��B �6 �v y� �Z xy �� �a ۀT�B������1�����5����eeBx�<�����R �7 �!wz"M)"Wc#�#��$kF$��%"�%:�%�&� &�x'�(�(X�)�`*J*9*�^+�[+��,=�,��/9�/��1`1� RegNtPreCreateKey

Windows API Usage

Category API
Anti Debug
  • IsDebuggerPresent
  • NtQuerySystemInformation
User Data Access
  • GetUserObjectInformation
  • OpenClipboard
Keyboard Access
  • GetKeyboardState
Process Manipulation Evasion
  • NtUnmapViewOfSection
Process Shell Execute
  • CreateProcess
  • ShellExecute
  • ShellExecuteEx
Network Winsock2
  • WSAStartup
  • WSAttemptAutodialName
Network Winsock
  • bind
  • closesocket
  • getaddrinfo
  • getsockname
  • setsockopt
  • socket
Network Winhttp
  • WinHttpOpen
Network Wininet
  • HttpOpenRequest
  • HttpQueryInfo
  • HttpSendRequest
  • InternetConnect
  • InternetOpen
  • InternetQueryOption
  • InternetReadFile
Syscall Use
  • ntdll.dll!NtAlertThreadByThreadId
  • ntdll.dll!NtAlpcSendWaitReceivePort
  • ntdll.dll!NtApphelpCacheControl
  • ntdll.dll!NtClose
  • ntdll.dll!NtConnectPort
  • ntdll.dll!NtCreateEvent
  • ntdll.dll!NtCreateFile
  • ntdll.dll!NtCreateSection
  • ntdll.dll!NtCreateSemaphore
  • ntdll.dll!NtDuplicateObject
Show More
  • ntdll.dll!NtEnumerateValueKey
  • ntdll.dll!NtFreeVirtualMemory
  • ntdll.dll!NtMapViewOfSection
  • ntdll.dll!NtOpenFile
  • ntdll.dll!NtOpenKey
  • ntdll.dll!NtOpenKeyEx
  • ntdll.dll!NtOpenProcessToken
  • ntdll.dll!NtOpenSection
  • ntdll.dll!NtProtectVirtualMemory
  • ntdll.dll!NtQueryAttributesFile
  • ntdll.dll!NtQueryInformationProcess
  • ntdll.dll!NtQueryInformationThread
  • ntdll.dll!NtQueryInformationToken
  • ntdll.dll!NtQueryKey
  • ntdll.dll!NtQueryPerformanceCounter
  • ntdll.dll!NtQuerySecurityAttributesToken
  • ntdll.dll!NtQueryValueKey
  • ntdll.dll!NtQueryVirtualMemory
  • ntdll.dll!NtQueryVolumeInformationFile
  • ntdll.dll!NtReleaseWorkerFactoryWorker
  • ntdll.dll!NtRequestWaitReplyPort
  • ntdll.dll!NtSetEvent
  • ntdll.dll!NtSetInformationProcess
  • ntdll.dll!NtSetInformationVirtualMemory
  • ntdll.dll!NtSetInformationWorkerFactory
  • ntdll.dll!NtTestAlert
  • ntdll.dll!NtTraceControl
  • ntdll.dll!NtUnmapViewOfSection
  • ntdll.dll!NtWaitForSingleObject
  • ntdll.dll!NtWaitForWorkViaWorkerFactory
  • ntdll.dll!NtWaitLowEventPair
  • ntdll.dll!NtWorkerFactoryWorkerReady
  • ntdll.dll!NtWriteFile
  • UNKNOWN

Shell Command Execution

"C:\Users\Wfyvwmlp\AppData\Local\Temp\is-VR2AV.tmp\726906787c7a2bb35ffe6d3605eba9f1eb43a544_0001281680.tmp" /SL5="$2013E,1027327,56832,c:\users\user\downloads\726906787c7a2bb35ffe6d3605eba9f1eb43a544_0001281680"
(NULL) C:\Users\Yqwusbhc\AppData\Local\Temp\7z6FFFC428\Setup.exe ama:install:b56354872ad1648e2c0892e5be370699ot
(NULL) C:\Users\Rzjzpsxd\AppData\Local\Temp\7z0EFDF28C\Setup_AppsWatcher_0_1.exe ama:install:a033e08f5ad99a58874de58249411555ot
runas C:\Users\Rzjzpsxd\AppData\Local\Temp\ama43229.exe
open \BD69.tmp\appswatcher.bat