What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey

What is Trojan:Win32/DorkBot.DU infection?

In this article you will certainly find regarding the definition of Trojan:Win32/DorkBot.DU and its negative influence on your computer. Such ransomware are a kind of malware that is elaborated by online fraudulences to require paying the ransom by a target.

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Most of the situations, Trojan:Win32/DorkBot.DU ransomware will advise its sufferers to initiate funds transfer for the function of reducing the effects of the changes that the Trojan infection has actually introduced to the target’s gadget.

Trojan:Win32/DorkBot.DU 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.
  • At least one process apparently crashed during execution;
  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • Attempts to connect to a dead IP:Port (2 unique times);
  • 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.
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Performs some HTTP requests;
  • Unconventionial language used in binary resources: Spanish (Puerto Rico);
  • 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;
  • Code injection with CreateRemoteThread in a remote process;
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • A process attempted to delay the analysis task by a long amount of time.;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • Attempts to repeatedly call a single API many times in order to delay analysis time. This significantly complicates the work of the virus analyzer. Typical malware tactics!
  • 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
  • Exhibits possible ransomware file modification behavior;
  • Checks the system manufacturer, likely for anti-virtualization;
  • Zeus P2P (Banking Trojan);
  • Attempts to modify proxy settings. This trick used for inject malware into connection between browser and server;
  • Creates a copy of itself;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the victim’s hard disk drive — so the sufferer can no more 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.
Similar behavior
Related domains Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj] Win32:Ransom-ANU [Trj]


One of the most common networks through which Trojan:Win32/DorkBot.DU are injected are:

  • By ways of phishing e-mails;
  • As a consequence of user winding up on a source that organizes a harmful software program;

As soon as the Trojan is efficiently infused, it will certainly either cipher the information on the sufferer’s computer or prevent the device from working in an appropriate fashion – while also placing a ransom money note that mentions the demand for the sufferers to effect the repayment for the objective of decrypting the records or bring back the file system back to the first problem. In most circumstances, the ransom note will certainly come up when the customer reboots the PC after the system has currently been damaged.

Trojan:Win32/DorkBot.DU circulation networks.

In different edges of the world, Trojan:Win32/DorkBot.DU expands by jumps and also bounds. However, the ransom money notes and techniques of obtaining the ransom quantity might vary depending upon particular local (local) setups. The ransom money notes and also techniques of obtaining the ransom money amount might differ depending on particular regional (regional) setups.

Ransomware injection

As an example:

    Faulty notifies concerning unlicensed software program.

    In specific locations, the Trojans commonly wrongfully report having found some unlicensed applications made it possible for on the sufferer’s gadget. The alert after that demands the individual to pay the ransom.

    Faulty statements about prohibited content.

    In nations where software program piracy is less preferred, this approach is not as efficient for the cyber scams. Alternatively, the Trojan:Win32/DorkBot.DU popup alert may wrongly declare to be originating from a police organization and will certainly report having situated youngster porn or various other illegal data on the gadget.

    Trojan:Win32/DorkBot.DU popup alert might falsely declare to be obtaining from a legislation enforcement establishment and also will certainly report having situated child porn or other prohibited information on the gadget. The alert will likewise have a requirement for the individual to pay the ransom.

Technical details

File Info:

crc32: 85B40487
md5: a8ae61659122821fa8583a5bb04c5dc8
name: A8AE61659122821FA8583A5BB04C5DC8.mlw
sha1: cc52f0bee0f432f47fd2e68235b39697073849f6
sha256: 4f5bbe4ca47c56186d25bb911cbf8fa2ce8a7e1079666473ce2139484349390c
sha512: 5e505aa8e0cef992b8502f8c68f07c6fada499891a8586c3b40a51146db29ae4bd911902fa9f44e173a4c7e8b64275de5dedf92559f4fd7d58dee8beaea185db
ssdeep: 1536:2EeLWkC3tAspT+AnlZ2VmjS5Es/rBl3c7q9DybtBc3AaFMoCA0atuTpNuSUzwkhr:2LLvJnUZ2VM8EIetDX5AjtKu9EeCG
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Trojan:Win32/DorkBot.DU also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.FamVT.VobfusLI.Trojan
Elastic malicious (high confidence)
DrWeb BackDoor.IRC.NgrBot.146
MicroWorld-eScan Trojan.GenericKD.1136991
CAT-QuickHeal Trojan.Lethic.B5
Qihoo-360 HEUR/Malware.QVM10.Gen
McAfee PWS-Zbot-FAXY!A8AE61659122
Cylance Unsafe
VIPRE Trojan.Win32.Generic!BT
AegisLab Trojan.Win32.Generic.4!c
Sangfor Trojan.Win32.Save.a
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Trojan.GenericKD.1136991
K7GW Riskware ( 0040eff71 )
Cybereason malicious.591228
BitDefenderTheta Gen:NN.ZexaF.34590.luY@ayWklJK
Cyren W32/Dorkbot.UQJF-6343
Symantec Trojan.Zbot!gen57
TotalDefense Win32/Inject.BEF
APEX Malicious
Avast Win32:Ransom-ANU [Trj]
ClamAV Win.Trojan.Agent-1207991
Kaspersky HEUR:Trojan.Win32.Generic
NANO-Antivirus Trojan.Win32.NgrBot.cqrtum
Tencent Malware.Win32.Gencirc.10cdcdce
Ad-Aware Trojan.GenericKD.1136991
Emsisoft Trojan.GenericKD.1136991 (B)
Comodo TrojWare.Win32.Spy.Zbot.NTJY@531mbb
F-Secure Trojan.TR/Rogue.1136991
Zillya Worm.Dorkbot.Win32.969
TrendMicro TROJ_SPNR.03GT13
Sophos ML/PE-A + Mal/EncPk-AKA
Ikarus Trojan.Win32.Matsnu
Jiangmin Trojan/Blocker.ggz
Avira TR/Rogue.1136991
Antiy-AVL Trojan[Ransom]/Win32.Blocker
Microsoft Trojan:Win32/DorkBot.DU
Arcabit Trojan.Generic.D11595F
ZoneAlarm HEUR:Trojan.Win32.Generic
GData Trojan.GenericKD.1136991
Cynet Malicious (score: 100)
AhnLab-V3 Trojan/Win32.Injector.R83019
Acronis suspicious
VBA32 BScope.Trojan.Inject
ALYac Trojan.GenericKD.1136991
MAX malware (ai score=80)
Panda Trj/CI.A
Zoner Trojan.Win32.17921
ESET-NOD32 Win32/Dorkbot.B
TrendMicro-HouseCall TROJ_SPNR.03GT13
Rising Worm.Dorkbot!8.1B4 (RDMK:cmRtazpUfOMAAm3AfvHbDFYCppPh)
Yandex Trojan.GenAsa!dNqRoPT+oRM
SentinelOne Static AI – Suspicious PE
eGambit Unsafe.AI_Score_97%
Fortinet W32/Androm.AOCK!tr
AVG Win32:Ransom-ANU [Trj]
CrowdStrike win/malicious_confidence_100% (D)

How to remove Trojan:Win32/DorkBot.DU 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 Trojan:Win32/DorkBot.DU 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:Win32/DorkBot.DU you can always ask me in the comments for getting help.

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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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