Written by Robert Bailey

What is Trojan.Dropper.SFX infection?

In this short article you will discover about the interpretation of Trojan.Dropper.SFX as well as its adverse impact on your computer system. Such ransomware are a type of malware that is elaborated by on the internet frauds to require paying the ransom by a victim.

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In the majority of the cases, Trojan.Dropper.SFX ransomware will instruct its sufferers to initiate funds transfer for the objective of counteracting the modifications that the Trojan infection has presented to the sufferer’s device.

Trojan.Dropper.SFX Summary

These adjustments can be as follows:

  • Executable code extraction;
  • Creates RWX memory;
  • A process attempted to delay the analysis task.;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • Reads data out of its own binary image;
  • A process created a hidden window;
  • Drops a binary and executes it;
  • Unconventionial language used in binary resources: Russian;
  • Uses Windows utilities for basic functionality;
  • Attempts to repeatedly call a single API many times in order to delay analysis time;
  • Checks the version of Bios, possibly for anti-virtualization;
  • Checks the CPU name from registry, possibly for anti-virtualization;
  • Attempts to modify proxy settings;
  • Collects information to fingerprint the system;
  • Anomalous binary characteristics;
  • Ciphering the records located on the victim’s hard disk drive — so the target can no more utilize the information;
  • Preventing routine access to the sufferer’s workstation;


The most common networks whereby Trojan.Dropper.SFX are injected are:

  • By means of phishing emails;
  • As a repercussion of user ending up on a source that holds a harmful software application;

As soon as the Trojan is efficiently injected, it will certainly either cipher the data on the target’s computer or protect against the gadget from operating in a correct fashion – while likewise placing a ransom money note that mentions the requirement for the victims to effect the settlement for the purpose of decrypting the files or recovering the documents system back to the first problem. In a lot of circumstances, the ransom money note will certainly show up when the customer reboots the PC after the system has actually already been damaged.

Trojan.Dropper.SFX distribution channels.

In different edges of the globe, Trojan.Dropper.SFX expands by jumps as well as bounds. However, the ransom money notes and also tricks of obtaining the ransom money quantity may differ depending upon certain regional (local) settings. The ransom notes as well as techniques of obtaining the ransom amount might vary depending on specific neighborhood (regional) settings.

Ransomware injection

As an example:

    Faulty signals concerning unlicensed software.

    In particular locations, the Trojans typically wrongfully report having actually spotted some unlicensed applications made it possible for on the sufferer’s tool. The sharp then requires the user to pay the ransom money.

    Faulty declarations regarding prohibited web content.

    In nations where software piracy is less preferred, this technique is not as efficient for the cyber frauds. Conversely, the Trojan.Dropper.SFX popup alert may falsely assert to be originating from a law enforcement organization and will certainly report having located kid pornography or other prohibited data on the device.

    Trojan.Dropper.SFX popup alert might falsely declare to be acquiring from a legislation enforcement institution as well as will report having located youngster porn or other prohibited data on the tool. The alert will in a similar way contain a need for the user to pay the ransom.

Technical details

File Info:

crc32: 113430FF
md5: 4a9889dafd314bacb5947851e0883a75
name: 2iudt.exe
sha1: 84ca1420f442ba2cebebb996242689f3d91754df
sha256: 5cd07a7afdd8171fbdbb9f40ac1a86c8adfd987b32c4a09781b7311194bd37fd
sha512: 6cc4aa49028c767ab4a722cafaf33f1b35d73c2e158db3d9adf495d3e2086088f9d432264d276348ce7bb131555cbbcab85e99f70b46f820ef39cdcb34a37c95
ssdeep: 6144:HRUKClejH/OpOR9UgnrJUWCy6vP/O01moVc7xRqmEFpz:HCp0jH/Op7Rhz201ZeYmEFpz
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright xa9 2005-2012 Oleg N. Scherbakov
InternalName: 7ZSfxMod
CompanyName: Oleg N. Scherbakov
PrivateBuild: December 30, 2012
ProductName: 7-Zip SFX
FileDescription: 7z Setup SFX (x86)
OriginalFilename: 7ZSfxMod_x86.exe
Translation: 0x0000 0x04b0

Trojan.Dropper.SFX also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.DownloadExtatsF.Trojan
DrWeb Trojan.MulDrop11.50564
MicroWorld-eScan Dropped:Trojan.GenericKD.42838707
Qihoo-360 Win32/Trojan.b07
McAfee Artemis!4A9889DAFD31
Cylance Unsafe
AegisLab Trojan.Win32.Zenpak.4!c
Sangfor Malware
K7AntiVirus Riskware ( 0040eff71 )
BitDefender Dropped:Trojan.GenericKD.42838707
K7GW Riskware ( 0040eff71 )
Cybereason malicious.0f442b
TrendMicro TROJ_GEN.R002C0PCD20
APEX Malicious
Avast Win32:Trojan-gen
GData Dropped:Trojan.GenericKD.42838707
Kaspersky Trojan.Win32.Zenpak.wrc
Alibaba Backdoor:Win32/KZip.c6f0438d
ViRobot Trojan.Win32.Z.Zenpak.275031
Rising Trojan.Generic@ML.98 (RDML:HbZGsxf33Auo2jEgfTIkSQ)
Ad-Aware Dropped:Trojan.GenericKD.42838707
Sophos Mal/Generic-S
F-Secure Trojan.TR/Crypt.Agent.bpnqw
Invincea heuristic
McAfee-GW-Edition RDN/Generic.dx
Emsisoft Dropped:Trojan.GenericKD.42838707 (B)
Ikarus Trojan-Ransom.Locky
Cyren W32/Trojan.LRUD-3770
Webroot W32.Malware.Gen
Avira TR/Crypt.Agent.bpnqw
MAX malware (ai score=85)
Antiy-AVL Trojan[Banker]/Win32.Cridex
Arcabit Trojan.Generic.D28DAAB3
ZoneAlarm Trojan.Win32.Zenpak.wrc
Microsoft Trojan:Win32/Bluteal!rfn
VBA32 TrojanBanker.Cridex
ALYac Dropped:Trojan.GenericKD.42838707
Malwarebytes Trojan.Dropper.SFX
Panda Trj/CI.A
ESET-NOD32 a variant of Win32/Kryptik.HBWJ
TrendMicro-HouseCall TROJ_GEN.R002H09CC20
Fortinet W32/Cridex.JWJ!tr
AVG Win32:Trojan-gen
CrowdStrike win/malicious_confidence_80% (W)

How to remove Trojan.Dropper.SFX 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

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.Dropper.SFX 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 Trojan.Dropper.SFX 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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