Ransom:Win32/Tobfy.O

What is Ransom:Win32/Tobfy.O infection?

In this article you will certainly discover about the interpretation of Ransom:Win32/Tobfy.O and its unfavorable effect on your computer. Such ransomware are a type of malware that is elaborated by on the internet frauds to require paying the ransom by a victim.

Most of the cases, Ransom:Win32/Tobfy.O infection will advise its victims to initiate funds move for the purpose of neutralizing the changes that the Trojan infection has actually introduced to the sufferer’s gadget.

Ransom:Win32/Tobfy.O 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.
  • Unconventionial language used in binary resources: Russian;
  • Executed a process and injected code into it, probably while unpacking;
  • A process attempted to delay the analysis task by a long amount of time.;
  • A process was set to shut the system down when terminated;
  • Behavior consistent with a dropper attempting to download the next stage.;
  • 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
  • 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 drive — so the target can no longer make use of the information;
  • Preventing regular 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
z.whorecord.xyz Ransom:Win32/Blocker.9e2a9ad9
a.tomx.xyz Ransom:Win32/Blocker.9e2a9ad9
en.kurasawa.org.ng Ransom:Win32/Blocker.9e2a9ad9
commerchuf.biz Ransom:Win32/Blocker.9e2a9ad9
kazakholop.biz Ransom:Win32/Blocker.9e2a9ad9

Ransom:Win32/Tobfy.O

The most normal channels through which Ransom:Win32/Tobfy.O Trojans are infused are:

  • By means of phishing emails;
  • As an effect of individual ending up on a resource that holds a harmful software;

As soon as the Trojan is effectively injected, it will certainly either cipher the data on the target’s PC or stop the gadget from functioning in a proper fashion – while additionally putting a ransom money note that discusses the requirement for the victims to effect the payment for the objective of decrypting the files or restoring the data system back to the preliminary problem. In most instances, the ransom note will show up when the client reboots the COMPUTER after the system has actually already been damaged.

Ransom:Win32/Tobfy.O circulation channels.

In various edges of the globe, Ransom:Win32/Tobfy.O expands by jumps and also bounds. Nevertheless, the ransom notes as well as tricks of obtaining the ransom quantity might differ depending on particular regional (local) settings. The ransom notes and also techniques of extorting the ransom money amount might differ depending on specific neighborhood (local) setups.

Ransomware injection

As an example:

    Faulty alerts regarding unlicensed software application.

    In specific locations, the Trojans typically wrongfully report having actually identified some unlicensed applications enabled on the target’s gadget. The alert after that demands the customer to pay the ransom money.

    Faulty statements about prohibited material.

    In nations where software application piracy is less prominent, this method is not as effective for the cyber fraudulences. Conversely, the Ransom:Win32/Tobfy.O popup alert might wrongly assert to be deriving from a law enforcement organization and also will certainly report having located child porn or other illegal information on the tool.

    Ransom:Win32/Tobfy.O popup alert may incorrectly assert to be obtaining from a law enforcement institution and will report having located kid pornography or various other unlawful information on the device. The alert will likewise include a need for the user to pay the ransom money.

Technical details

File Info:

crc32: 3E6CDC64md5: a47fa79d9fdfc45aa3a9d74c6f022d77name: A47FA79D9FDFC45AA3A9D74C6F022D77.mlwsha1: 023bf98e13772231f6d5607aad6afebbf236337csha256: 688e862ff915d0f5302f849928f1a28e8cb07a3c4b066ae0584fe9de02c1633bsha512: b389898ef9b23d4764e8f8008e46bd47f3f1bc435890783294abc0d563530445c300196f2adece6c651e9fdb1ff5296b686f329da6f11e65737495fe61c25780ssdeep: 384:alz7fuI75NRzvyER4zKQbionS2FbaiLYAUO8HY+:Y57dmG4zKQnS2FbaiLYAy4+type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

LegalCopyright: Copyright (C) 2012InternalName: dfsfdsFileVersion: 20964, 0, 0, 0ProductName: fsdfdsdfsProductVersion: 36080, 0, 0, 0FileDescription: fdsdfsOriginalFilename: fdsfdsfdsTranslation: 0x0000 0x04b0

Ransom:Win32/Tobfy.O also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.AIDetect.malware1
K7AntiVirus Spyware ( 0055e3f61 )
Elastic malicious (high confidence)
DrWeb Trojan.Click.64722
Cynet Malicious (score: 100)
ALYac Gen:Variant.Razy.770412
Cylance Unsafe
Zillya Trojan.Blocker.Win32.5213
Sangfor Rootkit.Win32.Rustock.AY
CrowdStrike win/malicious_confidence_100% (D)
Alibaba Ransom:Win32/Blocker.9e2a9ad9
K7GW Spyware ( 0055e3f61 )
Cybereason malicious.d9fdfc
Symantec ML.Attribute.HighConfidence
ESET-NOD32 Win32/TrojanClicker.Agent.NSC
APEX Malicious
Avast Win32:Rustock-AY [Rtk]
Kaspersky Trojan-Ransom.Win32.Blocker.aqno
BitDefender Gen:Variant.Razy.770412
NANO-Antivirus Virus.Win32.Gen.ccmw
MicroWorld-eScan Gen:Variant.Razy.770412
Tencent Win32.Trojan.Blocker.ckhr
Ad-Aware Gen:Variant.Razy.770412
Sophos Mal/Generic-S
Comodo Malware@#us3zo491jy7r
BitDefenderTheta AI:Packer.1B0F28401F
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.mt
FireEye Generic.mg.a47fa79d9fdfc45a
Emsisoft Gen:Variant.Razy.770412 (B)
SentinelOne Static AI – Suspicious PE
Webroot W32.Trojan.Gen
Avira TR/Tobfy.O.1
eGambit Generic.Malware
Microsoft Ransom:Win32/Tobfy.O
Arcabit Trojan.Razy.DBC16C
AegisLab Trojan.Win32.Blocker.j!c
GData Gen:Variant.Razy.770412
McAfee Artemis!A47FA79D9FDF
MAX malware (ai score=99)
VBA32 BScope.TrojanDropper.Sysn
Panda Trj/Genetic.gen
Rising Ransom.Tobfy!8.339 (CLOUD)
Yandex Trojan.Blocker!JymGRQii3CI
Ikarus Trojan-Ransom.Blocker
Fortinet W32/Blocker.MUD!tr
AVG Win32:Rustock-AY [Rtk]

How to remove Ransom:Win32/Tobfy.O 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

Run the setup file.

Run Setup.exe
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 Scanning

Click on “Clean Now”.

GridinSoft Anti-Malware Scan Result

Are Your Protected?

Full version of GridinSoft

If the guide doesn’t help you to remove Ransom:Win32/Tobfy.O you can always ask me in the comments for getting help.

References

    About the author

    Robert Bailey

    Security engineer focused on malware behavior, removal workflows, and Windows hardening. Robert reviews threat articles for practical accuracy, checking detection names, symptoms, and cleanup steps before publication.

    Leave a Comment