What is TrojanDownloader:Win32/Terdot.A infection?

In this post you will find about the meaning of TrojanDownloader:Win32/Terdot.A as well as its adverse effect on your computer system. Such ransomware are a kind of malware that is clarified by online frauds to require paying the ransom by a target.

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In the majority of the instances, TrojanDownloader:Win32/Terdot.A virus will instruct its victims to initiate funds move for the purpose of reducing the effects of the modifications that the Trojan infection has presented to the target’s gadget.

TrojanDownloader:Win32/Terdot.A 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.
  • Mimics the system’s user agent string for its own requests;
  • 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;
  • A system process is generating network traffic likely as a result of process injection;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents found on the target’s hard disk — so the sufferer can no longer utilize the data;
  • Preventing normal access 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.
Similar behavior
Related domains Ransom.Kovter Ransom.Kovter


The most common channels through which TrojanDownloader:Win32/Terdot.A Trojans are injected are:

  • By methods of phishing emails;
  • As an effect of user ending up on a source that holds a destructive software application;

As soon as the Trojan is successfully infused, it will either cipher the data on the sufferer’s PC or protect against the device from functioning in a correct fashion – while likewise positioning a ransom note that states the demand for the targets to effect the settlement for the function of decrypting the papers or restoring the file system back to the preliminary condition. In many instances, the ransom money note will certainly turn up when the client restarts the PC after the system has actually already been damaged.

TrojanDownloader:Win32/Terdot.A circulation networks.

In numerous corners of the globe, TrojanDownloader:Win32/Terdot.A expands by leaps and bounds. Nevertheless, the ransom money notes and also methods of obtaining the ransom quantity might differ depending upon particular regional (regional) settings. The ransom notes and methods of obtaining the ransom amount may vary depending on specific local (local) setups.

Ransomware injection

For example:

    Faulty signals about unlicensed software application.

    In particular areas, the Trojans frequently wrongfully report having actually spotted some unlicensed applications enabled on the sufferer’s tool. The sharp after that demands the customer to pay the ransom money.

    Faulty statements concerning illegal material.

    In nations where software application piracy is much less prominent, this approach is not as effective for the cyber fraudulences. Additionally, the TrojanDownloader:Win32/Terdot.A popup alert might falsely assert to be deriving from a police institution and will report having located child pornography or various other prohibited information on the gadget.

    TrojanDownloader:Win32/Terdot.A popup alert might falsely assert to be acquiring from a legislation enforcement establishment and also will report having situated kid porn or various other unlawful data on the gadget. The alert will in a similar way contain a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: 7D8FCB4E
md5: a5037e3c002404fa4c961264de6ce2a9
name: A5037E3C002404FA4C961264DE6CE2A9.mlw
sha1: f0cd780990433b38617acb6c68ad489a58cd3905
sha256: 5b6a5dfe67e2068b3f4f6084ff0c7f2b964286d06bbcbea4dbf3ad4029974636
sha512: d7624367283c8978593a09783cf1d6ce879b2f15a4f1122e4103ddd873f7dc250217b7efd0df84bcbfb5ebdaa5824baebe9d322e695f1b2fa4494f160b6688be
ssdeep: 768:/y8Jsmp9tdKmlsW7SUPQHiubX9iEP1bd4PYhuzET+:/yysmpbdF/7SUGh/4PYh
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDownloader:Win32/Terdot.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetectVM.malware2
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader25.59514
MicroWorld-eScan Trojan.GenericKD.6244372
McAfee GenericRXDZ-EC!A5037E3C0024
Cylance Unsafe
AegisLab Trojan.Win32.Generic.4!c
Sangfor Malware
K7AntiVirus Trojan ( 00505e1f1 )
BitDefender Trojan.GenericKD.6244372
K7GW Trojan ( 00505e1f1 )
BitDefenderTheta Gen:NN.ZexaF.34804.cmW@ay5Jkjo
Symantec Ransom.Kovter
TrendMicro-HouseCall Mal_Locky-2
Avast Win32:Malware-gen
Kaspersky Trojan.Win32.Inject.ahpuj
NANO-Antivirus Trojan.Win32.Kryptik.evgyco
Rising Ransom.Locky!8.1CD4 (TFE:dGZlOgQU1gNvmnGFvA)
Ad-Aware Trojan.GenericKD.6244372
Sophos Mal/Generic-S
F-Secure Heuristic.HEUR/AGEN.1118248
TrendMicro Mal_Locky-2
McAfee-GW-Edition BehavesLike.Win32.Generic.pc
Emsisoft Trojan.GenericKD.6244372 (B)
MaxSecure Trojan.Malware.300983.susgen
Avira HEUR/AGEN.1118248
Microsoft TrojanDownloader:Win32/Terdot.A
Arcabit Trojan.Generic.D5F4814
ZoneAlarm Trojan.Win32.Inject.ahpuj
GData Trojan.GenericKD.6244372
Cynet Malicious (score: 100)
Acronis suspicious
VBA32 BScope.Trojan.Downloader
ALYac Trojan.GenericKD.6244372
Malwarebytes Malware.Heuristic.1004
Panda Trj/CI.A
APEX Malicious
ESET-NOD32 a variant of Win32/Kryptik.FHED
Tencent Win32.Trojan.Inject.Ljjn
SentinelOne Static AI – Malicious PE
eGambit Unsafe.AI_Score_99%
Fortinet W32/Kryptik.FIKL!tr
AVG Win32:Malware-gen
CrowdStrike win/malicious_confidence_80% (D)

How to remove TrojanDownloader:Win32/Terdot.A 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 TrojanDownloader:Win32/Terdot.A 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 TrojanDownloader:Win32/Terdot.A 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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