What is TrojanDropper:Win32/Effbee.A infection?

In this short article you will certainly find regarding the interpretation of TrojanDropper:Win32/Effbee.A as well as its adverse effect on your computer. Such ransomware are a type of malware that is elaborated by on the internet scams to require paying the ransom by a target.

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Most of the situations, TrojanDropper:Win32/Effbee.A ransomware will certainly instruct its targets to initiate funds move for the function of reducing the effects of the modifications that the Trojan infection has presented to the sufferer’s device.

TrojanDropper:Win32/Effbee.A Summary

These modifications can be as complies with:

  • Injection (inter-process);
  • Injection (Process Hollowing);
  • Injection with CreateRemoteThread in a remote process;
  • Possible date expiration check, exits too soon after checking local time;
  • 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.;
  • Reads data out of its own binary image. The trick that allows the malware to read data out of your computer’s memory.

    Everything you run, type, or click on your computer goes through the memory. This includes passwords, bank account numbers, emails, and other confidential information. With this vulnerability, there is the potential for a malicious program to read that data.

  • Drops a binary and executes it. Trojan-Downloader installs itself to the system and waits until an Internet connection becomes available to connect to a remote server or website in order to download additional malware onto the infected computer.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Code injection with CreateRemoteThread in a remote process;
  • Queries information on disks, possibly for anti-virtualization. Since VMs share the same disk space so it is expected that they won’t be getting as much space as an application running on
    native hardware will have access to.
  • Executed a process and injected code into it, probably while unpacking;
  • Tries to unhook or modify Windows functions monitored by Cuckoo;
  • 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
  • Likely virus infection of existing system binary;
  • 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 records situated on the sufferer’s hard drive — so the victim can no longer make use of the information;
  • Preventing routine accessibility to the target’s workstation. This is the typical behavior of a virus called locker. It blocks access to the computer until the victim pays the ransom.


The most typical networks where TrojanDropper:Win32/Effbee.A Ransomware are infused are:

  • By ways of phishing emails;
  • As a consequence of customer ending up on a source that holds a destructive software program;

As quickly as the Trojan is efficiently injected, it will either cipher the data on the sufferer’s PC or avoid the gadget from operating in a proper manner – while likewise positioning a ransom note that mentions the demand for the sufferers to impact the settlement for the function of decrypting the records or bring back the documents system back to the initial condition. In many circumstances, the ransom note will certainly turn up when the customer restarts the PC after the system has actually currently been harmed.

TrojanDropper:Win32/Effbee.A distribution networks.

In different edges of the globe, TrojanDropper:Win32/Effbee.A grows by leaps as well as bounds. Nevertheless, the ransom money notes and methods of extorting the ransom money quantity may vary relying on particular neighborhood (regional) settings. The ransom money notes and tricks of extorting the ransom money amount might differ depending on certain local (regional) setups.

Ransomware injection

For instance:

    Faulty notifies concerning unlicensed software.

    In specific areas, the Trojans commonly wrongfully report having detected some unlicensed applications made it possible for on the sufferer’s device. The alert after that requires the customer to pay the ransom.

    Faulty declarations about unlawful content.

    In nations where software program piracy is less preferred, this technique is not as effective for the cyber frauds. Conversely, the TrojanDropper:Win32/Effbee.A popup alert may falsely assert to be stemming from a police establishment and also will certainly report having located child porn or various other illegal information on the gadget.

    TrojanDropper:Win32/Effbee.A popup alert might incorrectly claim to be obtaining from a law enforcement organization and also will certainly report having located child pornography or various other unlawful data on the device. The alert will likewise include a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 594CC14D
md5: 1441326a22455f37d70a6fb633b6fe47
name: 1441326A22455F37D70A6FB633B6FE47.mlw
sha1: b3f5140e4f305c9280779f72a1ef44fbcdfd63b5
sha256: f8d205a7641a7df5141a67133f7b54d7245a7ece664ece826eaeecacbeedbc9d
sha512: 1b36b3f39796199d465350854ab026d2562520e84709296c2a98f95afb94ab20362251a204e6fea7917216e2f581c32cf82d7e765f6e568da757d6637e1a460f
ssdeep: 24576:AQ3yom2b46vLudKVhhsgDxw55ESM9zUTov:AQC/C4kuduIg1mIzUTov
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

TrojanDropper:Win32/Effbee.A also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware2
K7AntiVirus Trojan ( 004020ef1 )
Elastic malicious (high confidence)
DrWeb BackDoor.Comet.152
Cynet Malicious (score: 100)
McAfee GenericRXCZ-BR!1441326A2245
Cylance Unsafe
Zillya Backdoor.DarkKomet.Win32.4059
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (D)
Alibaba TrojanDropper:Win32/Blocker.c6fa767f
K7GW Trojan ( 004020ef1 )
Cybereason malicious.a22455
Cyren W32/Agent.NXNL-3094
Symantec Trojan.Gen.MBT
ESET-NOD32 Win32/TrojanDropper.Agent.PYN
APEX Malicious
TotalDefense Win32/Tnega.RfCSaJB
Avast Win32:Malware-gen
ClamAV Win.Trojan.Gamarue-7007986-0
Kaspersky Trojan-Ransom.Win32.Blocker.hrft
BitDefender Backdoor.Generic.755288
NANO-Antivirus Trojan.Win32.Comet.haynlw
MicroWorld-eScan Backdoor.Generic.755288
Tencent Trojan-Ransom.Win32.Blocker.a
Ad-Aware Backdoor.Generic.755288
Sophos Mal/Generic-S
Comodo TrojWare.Win32.Agent.pyn@54cqtm
BitDefenderTheta Gen:NN.ZexaCO.34608.ZqX@a4JWL2iO
VIPRE Trojan-Dropper.Win32.Effbee.a (v)
Emsisoft Backdoor.Generic.755288 (B)
SentinelOne Static AI – Malicious PE
Avira TR/Dropper.Gen2
eGambit Trojan.Generic
Kingsoft Heur.SSC.2700553.0111.(kcloud)
Microsoft TrojanDropper:Win32/Effbee.A
Arcabit Backdoor.Generic.DB8658
AegisLab Trojan.Win32.Blocker.tnqj
GData Win32.Trojan-Dropper.BeiF.A
AhnLab-V3 Backdoor/Win32.DarkKomet.R48242
VBA32 Hoax.Blocker
MAX malware (ai score=100)
Malwarebytes Trojan.Dropper
Panda Trj/CI.A
Rising Ransom.Blocker!8.12A (CLOUD)
Yandex Trojan.GenAsa!N71EllaXIy8
Ikarus Trojan-Downloader.O97M.Donoff
Fortinet W32/Dropper.PYN!tr
AVG Win32:Malware-gen
Qihoo-360 Win32/Ransom.Blocker.HgAASQsA

How to remove TrojanDropper:Win32/Effbee.A 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 TrojanDropper:Win32/Effbee.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:

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If the guide doesn’t help you to remove TrojanDropper:Win32/Effbee.A you can always ask me in the comments for getting help.

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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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