What is Backdoor.Orcus infection?

In this short article you will certainly find regarding the definition of Backdoor.Orcus and also its adverse impact on your computer. Such ransomware are a type of malware that is elaborated by on the internet scams to demand paying the ransom money by a sufferer.

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Most of the instances, Backdoor.Orcus infection will certainly instruct its targets to launch funds transfer for the objective of reducing the effects of the modifications that the Trojan infection has presented to the target’s tool.

Backdoor.Orcus Summary

These adjustments can be as adheres to:

  • 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.
  • 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.

  • Ciphering the files situated on the sufferer’s hard drive — so the victim can no longer utilize the data;
  • Preventing routine accessibility to the victim’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most common channels whereby Backdoor.Orcus Ransomware Trojans are infused are:

  • By ways of phishing emails;
  • As a consequence of customer ending up on a resource that holds a harmful software application;

As soon as the Trojan is effectively infused, it will either cipher the data on the victim’s PC or avoid the gadget from working in an appropriate fashion – while additionally placing a ransom note that states the need for the targets to effect the repayment for the objective of decrypting the documents or bring back the data system back to the preliminary condition. In most circumstances, the ransom note will turn up when the customer restarts the PC after the system has actually currently been harmed.

Backdoor.Orcus circulation channels.

In different edges of the world, Backdoor.Orcus expands by leaps as well as bounds. Nevertheless, the ransom notes and also techniques of extorting the ransom money amount might vary depending on certain local (local) setups. The ransom money notes and techniques of extorting the ransom quantity might differ depending on particular local (local) setups.

Ransomware injection

For example:

    Faulty notifies about unlicensed software.

    In specific areas, the Trojans usually wrongfully report having identified some unlicensed applications made it possible for on the sufferer’s tool. The sharp then demands the user to pay the ransom.

    Faulty declarations about unlawful material.

    In countries where software application piracy is less prominent, this approach is not as reliable for the cyber fraudulences. Conversely, the Backdoor.Orcus popup alert may falsely declare to be deriving from a police establishment and will certainly report having located youngster pornography or other prohibited data on the device.

    Backdoor.Orcus popup alert might wrongly claim to be deriving from a legislation enforcement establishment and also will report having located child porn or various other illegal data on the device. The alert will likewise have a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 950FBF97
md5: 4b30b56c7cc88e81a45725e69f5dbac0
name: 4B30B56C7CC88E81A45725E69F5DBAC0.mlw
sha1: 90fe95488508f57f8afff970c33159e1c76a180a
sha256: 9348e6db0c0f54832ef7c5906f4bd4161871e5ac1e7ca9b52b8376f555abf4d0
sha512: af4b0ed00e74277eb3bd5ca517a911e8b257c9388f28a63f87b6f3dda92bbc8863da523e027d4228f75d7fb5837184c6cef6aa203e006e82a06ae5c269b814b7
ssdeep: 768:iUMZxvQtgL7sr/c64VGQbICWlUMtFy/dT4tqwwiklVlqiizAynMA9UkAV:iT4S+tFy/xnwwiaqiizhnl9UtV
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

Translation: 0x0000 0x04b0
Assembly Version:
InternalName: aa.exe
OriginalFilename: aa.exe

Backdoor.Orcus also known as:

GridinSoft Trojan.Ransom.Gen
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader10.42254
Cynet Malicious (score: 100)
ALYac Gen:Variant.Zusy.81674
Cylance Unsafe
Zillya Trojan.Injector.Win32.500355
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/Blocker.8f4a0189
Cybereason malicious.c7cc88
Cyren W32/Trojan.CCY.gen!Eldorado
Symantec ML.Attribute.HighConfidence
ESET-NOD32 a variant of MSIL/Injector.CAI
APEX Malicious
Avast MSIL:GenMalicious-IW [Trj]
ClamAV Win.Trojan.Bladbindi-1
Kaspersky Trojan-Ransom.Win32.Blocker.dbhm
BitDefender Gen:Variant.Zusy.81674
NANO-Antivirus Trojan.Win32.Blocker.cqzvuz
MicroWorld-eScan Gen:Variant.Zusy.81674
Tencent Win32.Trojan.Blocker.Pdci
Ad-Aware Gen:Variant.Zusy.81674
Sophos Mal/Generic-S + Troj/MSIL-ILJ
Comodo Malware@#2fkrw2u71947
BitDefenderTheta Gen:NN.ZemsilF.34628.hm0@aW!NB0p
VIPRE Trojan.Win32.Generic!BT
Emsisoft Gen:Variant.Zusy.81674 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.Blocker.gre
Avira TR/Dropper.MSIL.Gen
eGambit Unsafe.AI_Score_98%
Kingsoft Win32.Troj.Undef.(kcloud)
Microsoft Backdoor:Win32/Bladabindi!ml
Arcabit Trojan.Zusy.D13F0A
AegisLab Trojan.Win32.Blocker.lL3a
GData Gen:Variant.Zusy.81674
AhnLab-V3 Trojan/Win32.Generic.C220868
McAfee Artemis!4B30B56C7CC8
MAX malware (ai score=89)
VBA32 Hoax.Blocker
Malwarebytes Backdoor.Orcus
Panda Trj/CI.A
Ikarus Trojan-Spy.Agent
MaxSecure Trojan.Malware.300983.susgen
Fortinet MSIL/Injector.BWZ!tr
AVG MSIL:GenMalicious-IW [Trj]
Qihoo-360 Win32/Ransom.Blocker.HwMA9psA

How to remove Backdoor.Orcus virus?

Unwanted application has ofter come with other viruses and spyware. This threats can steal account credentials, or crypt your documents for ransom.
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There is no better way to recognize, remove and prevent PC threats than to use an anti-malware software from GridinSoft2.

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.Orcus 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:

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

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  1. GridinSoft Anti-Malware Review from HowToFix site:
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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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