Backdoor.Dropper

Written by Robert Bailey

What is Backdoor.Dropper infection?

In this short article you will certainly find regarding the definition of Backdoor.Dropper and its adverse impact on your computer. Such ransomware are a kind of malware that is clarified by on the internet fraudulences to demand paying the ransom by a victim.

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Most of the situations, Backdoor.Dropper ransomware will certainly advise its targets to start funds transfer for the objective of counteracting the amendments that the Trojan infection has actually presented to the victim’s device.

Backdoor.Dropper Summary

These alterations can be as complies with:

  • Executable code extraction. Cybercriminals often use binary packers to hinder the malicious code from reverse-engineered by malware analysts. A packer is a tool that compresses, encrypts, and modifies a malicious file’s format. Sometimes packers can be used for legitimate ends, for example, to protect a program against cracking or copying.
  • Attempts to connect to a dead IP:Port (1 unique times);
  • Creates RWX memory. There is a security trick with memory regions that allows an attacker to fill a buffer with a shellcode and then execute it. Filling a buffer with shellcode isn’t a big deal, it’s just data. The problem arises when the attacker is able to control the instruction pointer (EIP), usually by corrupting a function’s stack frame using a stack-based buffer overflow, and then changing the flow of execution by assigning this pointer to the address of the shellcode.
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Uses Windows utilities for basic functionality;
  • Sniffs keystrokes;
  • A process was set to shut the system down when terminated;
  • Installs itself for autorun at Windows startup.

    There is simple tactic using the Windows startup folder located at:
    C:\Users\[user-name]\AppData\Roaming\Microsoft\Windows\StartMenu\Programs\Startup Shortcut links (.lnk extension) placed in this folder will cause Windows to launch the application each time [user-name] logs into Windows.

    The registry run keys perform the same action, and can be located in different locations:

    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
    • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers located on the victim’s hard drive — so the victim can no more utilize the data;
  • Preventing regular access to the sufferer’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.
Similar behavior
Related domains
z.whorecord.xyz TrojWare.Win32.Ransom.Xorist.ET@4mg4hg
a.tomx.xyz TrojWare.Win32.Ransom.Xorist.ET@4mg4hg

Backdoor.Dropper

One of the most common channels whereby Backdoor.Dropper Ransomware Trojans are infused are:

  • By means of phishing emails;
  • As a consequence of individual ending up on a resource that organizes a destructive software;

As soon as the Trojan is successfully infused, it will certainly either cipher the information on the sufferer’s PC or stop the tool from working in an appropriate way – while also positioning a ransom money note that points out the requirement for the sufferers to impact the settlement for the purpose of decrypting the documents or recovering the file system back to the initial condition. In most circumstances, the ransom note will show up when the customer reboots the COMPUTER after the system has actually already been harmed.

Backdoor.Dropper distribution networks.

In numerous edges of the globe, Backdoor.Dropper grows by jumps and also bounds. Nevertheless, the ransom notes and also tricks of obtaining the ransom money quantity may differ depending on certain regional (regional) settings. The ransom notes as well as methods of extorting the ransom amount may differ depending on certain local (local) setups.

Ransomware injection

As an example:

    Faulty informs concerning unlicensed software program.

    In particular areas, the Trojans often wrongfully report having detected some unlicensed applications enabled on the sufferer’s device. The sharp after that requires the individual to pay the ransom.

    Faulty declarations regarding illegal content.

    In nations where software piracy is much less popular, this method is not as reliable for the cyber scams. Alternatively, the Backdoor.Dropper popup alert might incorrectly claim to be deriving from a police establishment as well as will report having located kid porn or various other illegal data on the gadget.

    Backdoor.Dropper popup alert may falsely claim to be obtaining from a legislation enforcement organization and also will report having situated child porn or various other unlawful information on the tool. The alert will similarly have a need for the customer to pay the ransom.

Technical details

File Info:

crc32: F1BC366A
md5: aae3c28cbe57932f7916d0a9d7db6baa
name: joined.exe
sha1: 55e6340e67dec2470dd61a7fb235636ed813623c
sha256: 9a4ec6b06682a36705365f027947859f0ae5b5883bc31dc0460f224f2501fb60
sha512: 4cde79d3b953fe5e768c1d7b9acd90242e01add92c654ac8a63b9fa6e199169b715786c4a917fe3624ae0b10340918d9b83a1f7f69a75b79cf62e85bd9df72dc
ssdeep: 98304:cvnV9CHnb3YkOoo4FBWJmgdMXA/xr9LlcJGVXhvxtE:c/mHckOqgmXZGVxvg
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
LegalCopyright:
Assembly Version: 0.0.0.7
InternalName: NjRat 0.7D.exe
FileVersion: 0.0.0.7
CompanyName:
LegalTrademarks:
Comments:
ProductName:
ProductVersion: 0.0.0.7
FileDescription:
OriginalFilename: NjRat 0.7D.exe

Backdoor.Dropper also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
DrWeb Trojan.MulDrop8.22787
MicroWorld-eScan Trojan.MSIL.Injector.MF
CMC Backdoor.Win32.Poison!O
CAT-QuickHeal TrojanDropper.Small.PQ4
Qihoo-360 HEUR/QVM20.1.654D.Malware.Gen
ALYac Trojan.MSIL.Injector.MF
Cylance Unsafe
Sangfor Malware
CrowdStrike win/malicious_confidence_100% (W)
BitDefender Trojan.MSIL.Injector.MF
K7GW Backdoor ( 0040f6fb1 )
K7AntiVirus Backdoor ( 0040f6fb1 )
TrendMicro TROJ_VBINDER.SM
BitDefenderTheta Gen:NN.ZexaF.34104.@t0@aiCAX8n
F-Prot W32/GenTroj.S.gen!Eldorado
APEX Malicious
Avast Win32:GenMalicious-NUS [Trj]
ClamAV Win.Trojan.Poison-8692
GData Win32.Trojan-Dropper.Agent.AMY
Kaspersky Backdoor.Win32.Poison.ggrf
Alibaba Backdoor:Win32/Poison.a03e9b95
NANO-Antivirus Trojan.Win32.Poison.cbeljp
ViRobot Backdoor.Win32.Agent.67584.L
AegisLab Trojan.Win32.Poison.tnhw
Rising Dropper.Win32.Small.bnv (CLOUD)
Ad-Aware Trojan.MSIL.Injector.MF
Emsisoft Trojan.MSIL.Injector.MF (B)
Comodo TrojWare.Win32.Ransom.Xorist.ET@4mg4hg
F-Secure Heuristic.HEUR/AGEN.1022123
Baidu Win32.Trojan-Dropper.Small.o
VIPRE Detect.Trojan.Win32.Small.nmm (v)
Invincea heuristic
McAfee-GW-Edition BehavesLike.Win32.Generic.tc
Trapmine malicious.high.ml.score
FireEye Generic.mg.aae3c28cbe57932f
Sophos Troj/Vbinder-D
Ikarus Backdoor.Poison
Cyren W32/GenTroj.S.gen!Eldorado
Jiangmin Backdoor/Poison.abtg
Webroot W32.Dropper.Gen
Avira HEUR/AGEN.1022123
Endgame malicious (high confidence)
Arcabit Trojan.MSIL.Injector.MF
ZoneAlarm Backdoor.Win32.Poison.ggrf
Microsoft VirTool:Win32/Vbinder
AhnLab-V3 Backdoor/Win32.Poison.R72119
Acronis suspicious
McAfee GenericRXAC-LG!AAE3C28CBE57
MAX malware (ai score=83)
VBA32 Backdoor.Poison
Malwarebytes Backdoor.Dropper
Panda Trj/Injector.BH
ESET-NOD32 Win32/TrojanDropper.Small.NMM
TrendMicro-HouseCall TROJ_VBINDER.SM
Tencent Malware.Win32.Gencirc.10b3e7f9
Yandex Trojan.Oxij.Gen.LA
SentinelOne DFI – Suspicious PE
eGambit Unsafe.AI_Score_99%
Fortinet W32/Xorist.ET!tr
AVG Win32:GenMalicious-NUS [Trj]
Cybereason malicious.cbe579
Paloalto generic.ml

How to remove Backdoor.Dropper ransomware?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
Reasons why I would recommend GridinSoft1

The is an excellent way to deal with recognizing and removing threats – using Gridinsoft Anti-Malware. This program will scan your PC, find and neutralize all suspicious processes.2.

Download GridinSoft Anti-Malware.

You can download GridinSoft Anti-Malware by clicking the button below:

Run the setup file.

When setup file has finished downloading, double-click on the setup-antimalware-fix.exe file to install GridinSoft Anti-Malware on your system.

Run Setup.exe

An User Account Control asking you about to allow GridinSoft Anti-Malware to make changes to your device. So, you should click “Yes” to continue with the installation.

GridinSoft Anti-Malware Setup

Press “Install” button.

GridinSoft Anti-Malware Install

Once installed, Anti-Malware will automatically run.

GridinSoft Anti-Malware Splash-Screen

Wait for the Anti-Malware scan to complete.

GridinSoft Anti-Malware will automatically start scanning your system for Backdoor.Dropper files and other malicious programs. This process can take a 20-30 minutes, so I suggest you periodically check on the status of the scan process.

GridinSoft Anti-Malware Scanning

Click on “Clean Now”.

When the scan has finished, you will see the list of infections that GridinSoft Anti-Malware has detected. To remove them click on the “Clean Now” button in right corner.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

GridinSoft Anti-Malware will scan and clean your PC for free in the trial period. The free version offer real-time protection for first 2 days. If you want to be fully protected at all times – I can recommended you to purchase a full version:

Full version of GridinSoft

Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Backdoor.Dropper you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

About the author

Robert Bailey

Security Engineer. Interested in malware, reverse engineering, white ethical hacking. I like coding, travelling and bikes.

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