Ransom:Win32/Korasom.A

What is Ransom:Win32/Korasom.A infection?

In this article you will discover concerning the meaning of Ransom:Win32/Korasom.A and its adverse influence on your computer system. Such ransomware are a form of malware that is elaborated by on-line fraudulences to demand paying the ransom money by a victim.

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In the majority of the cases, Ransom:Win32/Korasom.A infection will certainly instruct its victims to start funds move for the purpose of reducing the effects of the amendments that the Trojan infection has introduced to the sufferer’s gadget.

Ransom:Win32/Korasom.A Summary

These alterations can be as adheres to:

  • 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.
  • 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.;
  • At least one IP Address, Domain, or File Name was found in a crypto call;
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Detects Sandboxie through the presence of a library;
  • Creates or sets a registry key to a long series of bytes, possibly to store a binary or malware config;
  • 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
  • Creates a copy of itself;
  • Attempts to create or modify system certificates;
  • Attempts to interact with an Alternate Data Stream (ADS);
  • 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.
  • Ciphering the records found on the victim’s hard disk — so the victim can no longer utilize the data;
  • 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.

Ransom:Win32/Korasom.A

The most typical networks whereby Ransom:Win32/Korasom.A are infused are:

  • By means of phishing emails;
  • As an effect of individual winding up on a source that holds a destructive software application;

As quickly as the Trojan is successfully injected, it will either cipher the data on the target’s computer or prevent the device from operating in an appropriate way – while additionally positioning a ransom note that discusses the demand for the targets to effect the repayment for the objective of decrypting the documents or bring back the file system back to the first condition. In the majority of circumstances, the ransom money note will certainly come up when the customer restarts the PC after the system has actually already been harmed.

Ransom:Win32/Korasom.A distribution networks.

In various corners of the world, Ransom:Win32/Korasom.A expands by jumps and bounds. Nevertheless, the ransom money notes and also tricks of extorting the ransom quantity might vary depending upon particular local (local) setups. The ransom notes as well as techniques of extorting the ransom money quantity may differ depending on particular local (regional) setups.

Ransomware injection

For example:

    Faulty notifies about unlicensed software.

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

    Faulty declarations regarding unlawful material.

    In nations where software piracy is less prominent, this method is not as reliable for the cyber frauds. Conversely, the Ransom:Win32/Korasom.A popup alert might falsely claim to be deriving from a police organization and also will certainly report having located child porn or other illegal data on the gadget.

    Ransom:Win32/Korasom.A popup alert might falsely assert to be deriving from a regulation enforcement organization and also will report having situated child porn or various other illegal data on the device. The alert will similarly contain a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: D899CF82
md5: c2300aac0f22062b057df333b063d253
name: C2300AAC0F22062B057DF333B063D253.mlw
sha1: 1c1d96dcd6d96b25c69412952b859d9b8c0f39a2
sha256: a1f4b808d214c5079837c608757a09972c5353fedbdf68b72d39fc8bf76cc4a4
sha512: 1ccfe0853468cafc99aafac2f4f82ea9c5683dfc97f131178007072e732bad77c6964b74bb0c5410d31e8e38f07110866449da745811c64061e30a999435e6c2
ssdeep: 12288:9I2QmOMcSO7yLN+6jEw9z+yI8yHjV7uikFg:9d7OMcN7yLNbj3Z+LDlubg
type: PE32 executable (GUI) Intel 80386 Mono/.Net assembly, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/Korasom.A also known as:

GridinSoft Trojan.Ransom.Gen
K7AntiVirus Trojan ( 00510e4a1 )
Elastic malicious (high confidence)
DrWeb Trojan.DownLoader25.3535
Cynet Malicious (score: 100)
ALYac Trojan.Ransom.Karo
Cylance Unsafe
Zillya Trojan.GenericKD.Win32.63277
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Trojan:Win32/TorJok.ba17be30
K7GW Trojan ( 00510e4a1 )
Cybereason malicious.c0f220
Cyren W32/Trojan.COZ.gen!Eldorado
Symantec Ransom.Karo
ESET-NOD32 a variant of MSIL/Filecoder.IH
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Ransomware.Karo-6331638-1
Kaspersky Trojan.Win32.TorJok.g
BitDefender Gen:Heur.MSIL.Bladabindi.1
NANO-Antivirus Trojan.Win32.TorJok.eqlfxd
ViRobot Trojan.Win32.S.Karo.720384.A
SUPERAntiSpyware Ransom.Karo/Variant
MicroWorld-eScan Gen:Heur.MSIL.Bladabindi.1
Tencent Win32.Trojan.Torjok.Svgq
Ad-Aware Gen:Heur.MSIL.Bladabindi.1
Sophos Mal/Generic-R + Mal/Karo-A
BitDefenderTheta Gen:NN.ZemsilF.34628.Rm0@a0V@Gdo
VIPRE Trojan.Win32.Generic!BT
TrendMicro Ransom_KARO.A
McAfee-GW-Edition BehavesLike.Win32.Generic.bc
FireEye Gen:Heur.MSIL.Bladabindi.1
Emsisoft Trojan-Ransom.Karo (A)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan.TorJok.m
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1123483
eGambit Trojan.Generic
Antiy-AVL Trojan/Win32.TorJok
Kingsoft Win32.Troj.GenericKD.v.(kcloud)
Microsoft Ransom:Win32/Korasom.A
Arcabit Trojan.MSIL.Bladabindi.1
AegisLab Trojan.Win32.TorJok.4!c
GData Gen:Heur.MSIL.Bladabindi.1
AhnLab-V3 Trojan/Win32.TorJok.C2029865
McAfee Trojan-FNHF!C2300AAC0F22
MAX malware (ai score=100)
VBA32 Trojan.TorJok
Malwarebytes Ransom.Karo
Panda Trj/GdSda.A
TrendMicro-HouseCall Ransom_KARO.A
Rising Trojan.Filecoder!8.68 (CLOUD)
Ikarus Trojan.MSIL.Filecoder
Fortinet MSIL/Filecoder.IH!tr.ransom
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.Generic.HwMAaAIA

How to remove Ransom:Win32/Korasom.A 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

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 Ransom:Win32/Korasom.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 Ransom:Win32/Korasom.A you can always ask me in the comments for getting help.

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References

  1. GridinSoft Anti-Malware Review from HowToFix site: https://howtofix.guide/gridinsoft-anti-malware/
  2. More information about GridinSoft products: https://gridinsoft.com/products/

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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