Trojan.Chthonic

Written by Robert Bailey

What is Trojan.Chthonic infection?

In this short article you will certainly locate regarding the definition of Trojan.Chthonic as well as its negative influence on your computer system. Such ransomware are a form of malware that is clarified by on-line frauds to require paying the ransom money by a victim.

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Most of the instances, Trojan.Chthonic infection will certainly instruct its victims to launch funds move for the objective of counteracting the amendments that the Trojan infection has actually introduced to the sufferer’s tool.

Trojan.Chthonic Summary

These adjustments 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 attempted to delay the analysis task.;
  • 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;
  • Attempts to stop active services;
  • 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
  • Attempts to modify browser security settings;
  • Creates a copy of itself;
  • Attempts to disable UAC.

    User Account Control or just UAC is a part of the Windows security system which prevents apps from making unwanted changes on PC.

    UAC includes several technologies 1:

    • File and egistry Virtualization;
    • Same-desktop Elevation;
    • Filtered Token;
    • User Interface Privilege Isolation;
    • Protected Mode Internet Explorer;
    • Installer Detection;
  • Attempts to disable Windows Defender;
  • 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.
  • Attempts to modify user notification settings;
  • Ciphering the files located on the victim’s hard disk drive — so the target can no longer utilize the information;
  • Preventing regular accessibility to the sufferer’s workstation;
Similar behavior
Related domains
z.whorecord.xyz Ransomware-GCQ!C4C757CB6E1E
a.tomx.xyz Ransomware-GCQ!C4C757CB6E1E

Trojan.Chthonic

The most typical networks whereby Trojan.Chthonic Trojans 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 a consequence of individual winding up on a resource that hosts a harmful software application;

As quickly as the Trojan is effectively infused, it will either cipher the data on the victim’s computer or protect against the device from functioning in a correct fashion – while additionally putting a ransom money note that discusses the need for the victims to effect the settlement for the objective of decrypting the documents or recovering the documents system back to the initial condition. In the majority of instances, the ransom note will show up when the client reboots the COMPUTER after the system has currently been damaged.

Trojan.Chthonic distribution networks.

In numerous corners of the globe, Trojan.Chthonic expands by jumps and also bounds. Nevertheless, the ransom notes as well as techniques of extorting the ransom money quantity may vary relying on particular neighborhood (regional) setups. The ransom money notes as well as techniques of obtaining the ransom quantity may differ depending on certain regional (local) settings.

Ransomware injection

For example:

    Faulty informs about unlicensed software program.

    In particular areas, the Trojans often wrongfully report having identified some unlicensed applications enabled on the sufferer’s tool. The alert after that requires the customer to pay the ransom money.

    Faulty declarations regarding illegal material.

    In countries where software piracy is much less popular, this method is not as efficient for the cyber frauds. Alternatively, the Trojan.Chthonic popup alert might wrongly claim to be originating from a law enforcement establishment as well as will report having situated child pornography or various other illegal information on the gadget.

    Trojan.Chthonic popup alert may incorrectly declare to be acquiring from a legislation enforcement establishment and also will report having situated youngster porn or other unlawful data on the tool. The alert will likewise include a need for the customer to pay the ransom money.

Technical details

File Info:

crc32: A18007A8
md5: c4c757cb6e1ebb3a0b1b29a5b0470ccd
name: C4C757CB6E1EBB3A0B1B29A5B0470CCD.mlw
sha1: dea13940ef685da45b51cb22049ab94cdb09487d
sha256: ddceeb556ced1be7941789fbe1bc0b571ba76be8cc9160b317e07bf5cd67ddad
sha512: aea8f38264160a2fe225825fd0c2936b758117cc484c7cebe170a9a625e7674457e28da2bbc3e4a8d6ae5835adcdbedbb6c45b181c211f2bab28d69969c0bd66
ssdeep: 6144:m3lQFDSfAhNk5hXNavf98SfAnq1goVnJY0dK8/a3w+s:qe2mYC97oODIv3w+s
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: xa9 Cerulean Studios, LLC. All rights reserved.
CompanyName: Cerulean Studios
ProductName: Trillian
ProductVersion: 6.0.0.58
FileDescription: Trillian
OriginalFilename: Trillian.exe
Translation: 0x0409 0x04b0

Trojan.Chthonic also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware1
Elastic malicious (high confidence)
MicroWorld-eScan Trojan.Agent.CJDO
FireEye Generic.mg.c4c757cb6e1ebb3a
CAT-QuickHeal Trojan.Generic
McAfee Ransomware-GCQ!C4C757CB6E1E
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
Sangfor Malware
K7AntiVirus Trojan ( 005224381 )
BitDefender Trojan.Agent.CJDO
K7GW Trojan ( 005224381 )
Cybereason malicious.b6e1eb
BitDefenderTheta Gen:NN.ZexaF.34804.xq0@aytiqcpi
Cyren W32/Kryptik.CUI.gen!Eldorado
Symantec Packed.Generic.459
ESET-NOD32 a variant of Win32/Kryptik.FTOA
APEX Malicious
Avast Win32:Malware-gen
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.Upatre.eqtiqd
Rising Trojan.Kryptik!1.AC11 (CLASSIC)
Ad-Aware Trojan.Agent.CJDO
Sophos ML/PE-A + Mal/Cerber-K
Comodo TrojWare.Win32.Ransom.Cerber.FTV@75b3ao
F-Secure Heuristic.HEUR/AGEN.1129194
DrWeb Trojan.DownLoader25.6021
Zillya Downloader.Upatre.Win32.63790
TrendMicro Ransom_HPCERBER.SMALY5A
McAfee-GW-Edition BehavesLike.Win32.PUPXCT.fh
Emsisoft Trojan.Agent.CJDO (B)
SentinelOne Static AI – Malicious PE – Ransomware
Jiangmin Trojan.Generic.gllnh
Avira HEUR/AGEN.1129194
MAX malware (ai score=86)
Antiy-AVL Trojan[Downloader]/Win32.Upatre
Microsoft VirTool:Win32/CeeInject.SE!bit
Arcabit Trojan.Agent.CJDO
AhnLab-V3 Win-Trojan/Cerber.Gen
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.Agent.CJDO
Cynet Malicious (score: 100)
Acronis suspicious
VBA32 TrojanDownloader.Upatre
ALYac Trojan.Agent.CJDO
TACHYON Trojan-Downloader/W32.Upatre.384512.B
Malwarebytes Trojan.Chthonic
Panda Trj/Genetic.gen
TrendMicro-HouseCall Ransom_HPCERBER.SMALY5A
Tencent Malware.Win32.Gencirc.10bb14a4
Yandex Trojan.GenAsa!tONJksK5WeA
Ikarus Trojan.Crypt
eGambit Unsafe.AI_Score_98%
Fortinet W32/Kryptik.HIJR!tr
AVG Win32:Malware-gen
Paloalto generic.ml
CrowdStrike win/malicious_confidence_100% (D)
Qihoo-360 Win32/Trojan.Generic.HgIASOUA

How to remove Trojan.Chthonic virus?

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 GridinSoft2

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.3.

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 Trojan.Chthonic 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 Trojan.Chthonic you can always ask me in the comments for getting help.

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References

  1. Microsoft Ignite: How to disable User Account Control (UAC) on Windows Server
  2. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  3. 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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