Trojan:Win32/Casdet!rfn

What is Trojan:Win32/Casdet!rfn infection?

In this post you will certainly discover about the definition of Trojan:Win32/Casdet!rfn and also its unfavorable influence on your computer. This virus can correctly be classified as hacktool – a program which is designed and used to break different security elements of an operating system.

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In the majority of the instances, Trojan:Win32/Occamy.C hacktool will not show any signs of its presence. However, the user may notice the changes of the components he uses everyday, because it is impossible for this virus to make everything quiet.

Trojan:Win32/Casdet!rfn Summary

These modifications 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.
  • 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.
  • HTTP traffic contains suspicious features which may be indicative of malware related traffic;
  • Performs some HTTP requests;
  • 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;
  • Checks for the presence of known windows from debuggers and forensic tools;
  • Steals private information from local Internet browsers;
  • Network activity contains more than one unique useragent.;
  • Collects information about installed applications;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Harvests credentials from local FTP client softwares;
  • Harvests information related to installed instant messenger clients;
  • 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.
Similar behavior
Related domains
klegrandlichgrum.com Trojan-Ransom.GandCrab
ip-api.com Trojan-Ransom.GandCrab

How Trojan:Win32/Casdet!rfn is distributed?

The majority of cases of Trojan:Win32/Casdet!rfn malware delivery goes to these ways:

  • Email spamming or spamming in social networks/communication platforms
  • Usage of unlicensed (hacked) programs or dubious tools
  • Malicious advertisements on the internet (ads with a malicious link or file inside)
  • Malicious advertisements on the web, however, is an old-timer of malware distribution. And the advice to stop clicking the blinking advertisements on untrustworthy websites exists as long as the ads on the Internet. You can also install ad blocking plugins for your web browser – they will deal with any kind of ads. However, if they are generated by adware which is already present on your PC, ad blockers will be useless.

    Email spamming became a very popular malware distribution method, since the users do not raise suspicion on notifications from DHL or Amazon about the incoming delivery. However, it is quite easy to distinguish the malevolent email from the original one. One which is send by a cybercriminals has a strange sender address – something like f0138skbeu@gmail.com, while the original email address has a specific domain name (@amazon.com or @dhl.us) and can also be seen on the official website in the “Contact us” tab.

    Software bundling is a widespread practice among the virus developers. Users who hack the programs to make them usable without purchasing a license approve any offer to include another program to the pack, because they are gaining money in such a way. Check precisely the installation window for signs like “Advanced installation settings” or so. The ability to switch off the malware installation often hides under such items.

    How can I detect that my PC is infected with Trojan:Win32/Casdet!rfn virus?

    In different edges of the world, victims of the Trojan:Win32/Casdet!rfn say about different signs of virus activity. Nonetheless, the common sign of the fact that your PC was attacked by a hacktool is disabling the security mechanisms (passwords) in the major system elements.

    Ransomware injection

    Changes that are made by Trojan:Win32/Casdet!rfn virus are next:

    Disabling the Windows Defender. An embedded anti-malware solution from Microsoft is a favorite target of malware creators. And since it is so easy to disable through Group Policies, every second trojan virus makes this action. XXXXXXXXXX is not an exception. After that step, you will not get a notification about the detected malware.

    Making several complicated manipulations with the system security settings. The virus disables not only a visible security mechanism but also turns off the methods which are used by the system to prevent malware execution. Under this term I mean the forbid to launch the VBS scripts, disabled by default MS Office macroses or remote registry editing facilities.

    Password extraction. Users who make use of a local Windows account may lose their credentials. The password of the local account is stored in a separate area of the winlogon process in encrypted form. Virus may easily call the decrypt function, and get the password of your account, as well as passwords of all users of your PC and local network.

    Technical details

    File Info:

    crc32: BB067C54
    md5: c3defbd7fffd387d09be5347ec1a83a1
    name: dor.exe
    sha1: ebc54f115ef8f632c6b46e72fddab8c9ba383ff3
    sha256: 189464e30cbebaec6a543baaf35c24a2d0f44143fc6992014c81780563c0984a
    sha512: 1796986c67528a0d02149abee0f1548551db6708cdf8affd79b3019a30c66fdf37b11abd19e4b0c055b88d1f8caa6c316cf27f96466bb59672415f120f492383
    ssdeep: 24576:E8DmVchRKPN6ESo+0JB2XIweCpI9Z2UBfVYhzZFQ4mB6tQJ:gARKPN6ESz0nw5pI9ZTfVIXQAqJ
    type: PE32 executable (GUI) Intel 80386, for MS Windows

    Version Info:

    LegalCopyright: Copyright xa9 2000 - 2014 KG and its Licensors
    InternalName: Mrale Detectable
    FileVersion: 5.7.4.7
    CompanyName: NoVirusThanks Company Srl
    LegalTrademarks: Copyright xa9 2000 - 2014 KG and its Licensors
    Comments: Sculatr 2500 Aes
    ProductName: Mrale Detectable
    ProductVersion: 5.7.4.7
    FileDescription: Sculatr 2500 Aes
    Translation: 0x0409 0x04b0

    Trojan:Win32/Casdet!rfn also known as:

    GridinSoft Trojan.Ransom.Gen
    MicroWorld-eScan Trojan.GenericKD.41899419
    FireEye Generic.mg.c3defbd7fffd387d
    CAT-QuickHeal Trojan.Chapak
    McAfee Artemis!C3DEFBD7FFFD
    Malwarebytes Spyware.Vidar
    Zillya Trojan.Kryptik.Win32.1794435
    Sangfor Malware
    K7AntiVirus Trojan ( 00559c111 )
    Alibaba Trojan:Win32/Chapak.d8c8bbfe
    K7GW Trojan ( 00559c111 )
    CrowdStrike win/malicious_confidence_90% (W)
    Invincea heuristic
    BitDefenderTheta Gen:NN.ZexaF.32519.mz0@aSC2ukhi
    Symantec Trojan.Gen.MBT
    APEX Malicious
    Avast Win32:Malware-gen
    GData Trojan.GenericKD.41899419
    Kaspersky Trojan.Win32.Chapak.eatw
    BitDefender Trojan.GenericKD.41899419
    NANO-Antivirus Trojan.Win32.Chapak.gdndpe
    AegisLab Trojan.Multi.Generic.4!c
    Rising Trojan.Generic@ML.83 (RDML:xkjjshEts+8//lcMJjLh/g)
    Endgame malicious (high confidence)
    Sophos Mal/Generic-S
    Comodo Malware@#3v13sehq3v075
    F-Secure Trojan.TR/AD.MalwareCrypter.qbunp
    DrWeb Trojan.PWS.Stealer.24298
    VIPRE Trojan.Win32.Generic!BT
    TrendMicro TROJ_GEN.R020C0WJH19
    McAfee-GW-Edition BehavesLike.Win32.Generic.tc
    Emsisoft Trojan.GenericKD.41899419 (B)
    Ikarus Trojan-Ransom.GandCrab
    Cyren W32/Trojan.DIWJ-1219
    Webroot W32.Chapak.Eatw
    Avira TR/AD.MalwareCrypter.qbunp
    Antiy-AVL Trojan/Win32.Chapak
    Microsoft Trojan:Win32/Casdet!rfn
    Arcabit Trojan.Generic.D27F559B
    ZoneAlarm Trojan.Win32.Chapak.eatw
    AhnLab-V3 Trojan/Win32.Chapak.C3517361
    Acronis suspicious
    ALYac Trojan.Agent.Casur
    MAX malware (ai score=87)
    Ad-Aware Trojan.GenericKD.41899419
    Cylance Unsafe
    Panda Trj/CI.A
    ESET-NOD32 a variant of Win32/Injector.EIOZ
    TrendMicro-HouseCall TROJ_GEN.R020C0WJH19
    Fortinet W32/Chapak.EATW!tr
    AVG Win32:Malware-gen
    Paloalto generic.ml
    Qihoo-360 HEUR/QVM10.2.91A3.Malware.Gen

    How to remove Trojan:Win32/Casdet!rfn 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 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 install-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:Win32/Casdet!rfn 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

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    If the guide doesn’t help you to remove Trojan:Win32/Casdet!rfn 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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