Trojan.Agent.CQSS

Written by Robert Bailey

What is Trojan.Agent.CQSS infection?

In this article you will locate about the meaning of Trojan.Agent.CQSS as well as its adverse impact on your computer system. Such ransomware are a kind of malware that is clarified by on the internet frauds to demand paying the ransom money by a target.

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Most of the situations, Trojan.Agent.CQSS infection will certainly instruct its targets to launch funds move for the function of counteracting the changes that the Trojan infection has actually introduced to the sufferer’s gadget.

Trojan.Agent.CQSS Summary

These alterations can be as follows:

  • 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.
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • 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.
  • A process created a hidden window;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Executed a process and injected code into it, probably while unpacking;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • Exhibits behavior characteristic of Nymaim malware;
  • Zeus P2P (Banking Trojan);
  • Collects information to fingerprint the system. There are behavioral human characteristics that can be used to digitally identify a person to grant access to systems, devices, or data. Unlike passwords and verification codes, fingerprints are fundamental parts of user’s identities. Among the threats blocked on biometric data processing and storage systems is spyware, the malware used in phishing attacks (mostly spyware downloaders and droppers), ransomware, and Banking Trojans as posing the greatest danger.
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the files located on the target’s disk drive — so the victim can no more use the information;
  • Preventing normal accessibility to the victim’s workstation;
Similar behavior
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Trojan.Agent.CQSS

The most typical channels whereby Trojan.Agent.CQSS are infused are:

  • By methods of phishing e-mails. Email phishing is a cyber attack that uses disguised email as a goal is to trick the recipient into believing that the message is something they want or need — a request from their bank, for instance, or a note from someone in their company — and to click a link for download a malware.
  • As an effect of individual winding up on a resource that hosts a destructive software program;

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the target’s computer or avoid the gadget from functioning in an appropriate manner – while likewise positioning a ransom money note that points out the demand for the victims to effect the repayment for the purpose of decrypting the papers or recovering the file system back to the preliminary condition. In many instances, the ransom note will certainly come up when the client reboots the PC after the system has actually already been damaged.

Trojan.Agent.CQSS circulation channels.

In various corners of the world, Trojan.Agent.CQSS grows by jumps and also bounds. However, the ransom money notes and tricks of extorting the ransom money quantity might differ depending upon certain local (regional) settings. The ransom notes as well as tricks of extorting the ransom amount might differ depending on specific regional (local) setups.

Ransomware injection

As an example:

    Faulty notifies about unlicensed software.

    In specific locations, the Trojans frequently wrongfully report having detected some unlicensed applications made it possible for on the sufferer’s gadget. The sharp after that demands the user to pay the ransom money.

    Faulty statements regarding prohibited content.

    In countries where software program piracy is less preferred, this approach is not as reliable for the cyber frauds. Alternatively, the Trojan.Agent.CQSS popup alert might incorrectly claim to be stemming from a law enforcement organization and also will report having situated child pornography or other illegal data on the device.

    Trojan.Agent.CQSS popup alert might incorrectly declare to be acquiring from a regulation enforcement establishment and also will certainly report having situated youngster pornography or various other unlawful information on the gadget. The alert will similarly contain a requirement for the customer to pay the ransom money.

Technical details

File Info:

crc32: 045595F0
md5: bd2e9133c8f0a5752aacea6152c846a3
name: BD2E9133C8F0A5752AACEA6152C846A3.mlw
sha1: 6fb69996339d3f1cf3f2c9ffc5e8504b14dd0031
sha256: dcba66bccc574059b4000dea3b190032ca038748474a74b7293a357e55501bb7
sha512: a4fd3ef7934659e8865ac3ff21292f1467d4a1ca3f4bfb652dc551772f42d4821e24e97ea7175ce6754cf5b078d5520dcfc0d3c9214abd2a548420cb5c905d96
ssdeep: 12288:M2Xq3sHTNAx53O+c/XEHswN5MWCzV/LTDL4zsZd:M2XTHTk5e+3HxjMWaLHU4Zd
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan.Agent.CQSS also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.Agent.CQSS
FireEye Generic.mg.bd2e9133c8f0a575
CAT-QuickHeal Ransom.Cerber.ZZ4
ALYac Trojan.Agent.CQSS
Malwarebytes Trojan.Nymaim
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Multi.Generic.4!c
K7AntiVirus Trojan ( 0051b2281 )
BitDefender Trojan.Agent.CQSS
K7GW Trojan ( 0051b2281 )
Cybereason malicious.3c8f0a
BitDefenderTheta Gen:NN.ZexaF.34804.MuW@a8Xfv1l
Cyren W32/Nymaim.CI.gen!Eldorado
Symantec Packed.Generic.493
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan-Banker.Win32.GozNym.pef
NANO-Antivirus Trojan.Win32.Kryptik.evcpgb
Tencent Malware.Win32.Gencirc.10b36acb
Ad-Aware Trojan.Agent.CQSS
TACHYON Trojan/W32.Agent.626688.OM
Sophos Mal/Generic-S + Mal/Elenoocka-E
Comodo TrojWare.Win32.Crypt.C@7vajd0
F-Secure Heuristic.HEUR/AGEN.1111254
DrWeb Trojan.Inject2.63261
Zillya Trojan.Kryptik.Win32.1305203
McAfee-GW-Edition BehavesLike.Win32.Dropper.jc
Emsisoft Trojan.Agent.CQSS (B)
Ikarus Trojan.Win32.Crypt
Jiangmin Trojan.Refinka.ahs
Avira HEUR/AGEN.1111254
Antiy-AVL Trojan/Win32.TSGeneric
Microsoft TrojanDownloader:Win32/Nymaim.K
Arcabit Trojan.Agent.CQSS
ZoneAlarm HEUR:Trojan-Banker.Win32.GozNym.pef
GData Trojan.Agent.CQSS
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Nymaim.R213858
Acronis suspicious
McAfee Trojan-FOIZ!BD2E9133C8F0
MAX malware (ai score=99)
VBA32 Trojan.Refinka
Cylance Unsafe
Panda Trj/Genetic.gen
ESET-NOD32 a variant of Win32/Kryptik.GCCF
Rising Trojan.Kryptik!1.AE8F (CLASSIC)
Yandex Trojan.GenAsa!kWyrPVP1imY
SentinelOne Static AI – Malicious PE – Downloader
eGambit Unsafe.AI_Score_88%
Fortinet W32/Kryptik.GKMB!tr
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (W)
Qihoo-360 HEUR/QVM19.1.A4A7.Malware.Gen

How to remove Trojan.Agent.CQSS ransomware?

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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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.

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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.

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Press “Install” button.

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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 Trojan.Agent.CQSS 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.

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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?

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If the guide doesn’t help you to remove Trojan.Agent.CQSS 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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