Worm:Win32/Rebhip.Z

Written by Robert Bailey

What is Worm:Win32/Rebhip.Z infection?

In this short article you will find concerning the definition of Worm:Win32/Rebhip.Z as well as its adverse effect on your computer system. Such ransomware are a kind of malware that is specified by online fraudulences to demand paying the ransom money by a target.

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In the majority of the situations, Worm:Win32/Rebhip.Z infection will certainly instruct its sufferers to initiate funds transfer for the function of counteracting the modifications that the Trojan infection has actually presented to the sufferer’s tool.

Worm:Win32/Rebhip.Z 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 with CreateRemoteThread in a remote process;
  • 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.
  • 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.
  • The executable is compressed using UPX;
  • Uses Windows utilities for basic functionality;
  • Detects Sandboxie through the presence of a library;
  • Sniffs keystrokes;
  • 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;
  • Creates a hidden or system file. The malware adds the hidden attribute to every file and folder on your system, so it appears as if everything has been deleted from your hard drive.
  • Checks for the presence of known devices from debuggers and forensic tools;
  • Creates a copy of itself;
  • Creates known SpyNet mutexes and/or registry changes.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the papers situated on the sufferer’s disk drive — so the victim can no longer use the data;
  • Preventing regular access 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.

Worm:Win32/Rebhip.Z

The most typical networks whereby Worm:Win32/Rebhip.Z are injected are:

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

As soon as the Trojan is successfully injected, it will certainly either cipher the data on the sufferer’s PC or avoid the tool from operating in an appropriate way – while likewise positioning a ransom money note that mentions the need for the targets to effect the repayment for the objective of decrypting the papers or bring back the documents system back to the first problem. In many circumstances, the ransom money note will show up when the client reboots the PC after the system has actually already been damaged.

Worm:Win32/Rebhip.Z distribution channels.

In numerous edges of the world, Worm:Win32/Rebhip.Z expands by jumps and bounds. Nevertheless, the ransom notes as well as tricks of extorting the ransom amount might vary depending upon certain regional (regional) setups. The ransom notes and also methods of extorting the ransom money amount may differ depending on specific neighborhood (local) settings.

Ransomware injection

For example:

    Faulty notifies regarding unlicensed software program.

    In certain locations, the Trojans usually wrongfully report having spotted some unlicensed applications made it possible for on the sufferer’s device. The alert then requires the customer to pay the ransom money.

    Faulty statements about prohibited material.

    In nations where software program piracy is less popular, this approach is not as effective for the cyber scams. Additionally, the Worm:Win32/Rebhip.Z popup alert may wrongly declare to be originating from a law enforcement establishment and also will certainly report having situated youngster pornography or other unlawful data on the gadget.

    Worm:Win32/Rebhip.Z popup alert may incorrectly declare to be obtaining from a legislation enforcement establishment and also will certainly report having located youngster pornography or other illegal data on the tool. The alert will similarly consist of a requirement for the user to pay the ransom.

Technical details

File Info:

crc32: ECC29FD5
md5: 9c89a1186cd51f70ab038dd96d9bb741
name: 9C89A1186CD51F70AB038DD96D9BB741.mlw
sha1: e204c6b79a24bfe106d83654a70f433d2a3e5135
sha256: 2945a5f4e05f94793eccbed669ca0fd333e86b39f2131ffdcfe398768ca82751
sha512: 8cbd2cf67b2df6f240c9d0907fcf57d2839172917d55f4b5352f1775bea9d8faab713715df84d421085c9e81afab098d8143567ae8273139ea9b544d5321fff6
ssdeep: 6144:wkkoGhDpMtu+KiXoCbTqnY78XDEx5/0MIPPIUf+I:LkLFpMImnvq1DE5sVIo+
type: PE32 executable (GUI) Intel 80386, for MS Windows, UPX compressed

Version Info:

0: [No Data]

Worm:Win32/Rebhip.Z also known as:

GridinSoft Trojan.Ransom.Gen
TotalDefense Win32/Spyrat!generic
MicroWorld-eScan Generic.Rebhip.D51E71E0
nProtect Generic.Rebhip.D51E71E0
CAT-QuickHeal Worm.Rebhip.A8
ALYac Generic.Rebhip.D51E71E0
Malwarebytes Backdoor.SpyNet
Zillya Trojan.Llac.Win32.3684
K7AntiVirus Trojan ( 00193f571 )
K7GW Trojan ( 00193f571 )
TheHacker Trojan/Dropper.Agent.blsd
NANO-Antivirus Trojan.Win32.Agent.dpugoa
Cyren W32/Risk.NWBE-4885
Symantec W32.Spyrat
TrendMicro-HouseCall TSPY_SPATET.SMT
Avast Win32:Evo-gen [Susp]
ClamAV Suspect.Trojan.Generic.FD-1
Kaspersky Trojan-Dropper.Win32.Agent.blsd
BitDefender Generic.Rebhip.D51E71E0
Agnitum Worm.DR.Rebhip.Gen
ViRobot Backdoor.Win32.Poisonivy.283648[UPX][h]
SUPERAntiSpyware Trojan.Agent/Gen-FraudLoad
Tencent Win32.Trojan-dropper.Agent.Hwcv
Ad-Aware Generic.Rebhip.D51E71E0
Sophos W32/Rebhip-AR
Comodo TrojWare.Win32.MalPack.~ULR
F-Secure Backdoor:W32/Spyrat.A
DrWeb BackDoor.Cybergate.1
VIPRE Worm.Win32.Rebhip.A (v)
TrendMicro TSPY_SPATET.SMT
McAfee-GW-Edition BehavesLike.Win32.ZvuZona.dc
Emsisoft Generic.Rebhip.D51E71E0 (B)
F-Prot W32/Dropper.AYXQ
ESET-NOD32 Win32/Spatet.A
Avira TR/Crypt.CFI.Gen
Antiy-AVL Trojan[Dropper]/Win32.Agent.blsd
Kingsoft Win32.Troj.Agent.(kcloud)
Microsoft Worm:Win32/Rebhip.Z
Jiangmin Trojan/Llac.bdt
Arcabit Generic.Rebhip.D51E71E0
GData Generic.Rebhip.D51E71E0
AhnLab-V3 Trojan/Win32.Llac
McAfee Artemis!9C89A1186CD5
AVware Worm.Win32.Rebhip.A (v)
VBA32 Trojan-Dropper.Agent.blsd
Panda Trj/Ransom.AB
Rising PE:Worm.VobfusEx!1.99DD
Ikarus Trojan-Dropper.Agent
Fortinet W32/Llac.GFU!tr
AVG PSW.Generic8.ISF
Baidu-International Trojan.Win32.Spatet.I
Qihoo-360 Malware.Radar01.Gen

How to remove Worm:Win32/Rebhip.Z 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 Worm:Win32/Rebhip.Z 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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Full version of GridinSoft Anti-Malware

If the guide doesn’t help you to remove Worm:Win32/Rebhip.Z 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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