Written by Robert Bailey

What is Ransom:Win32/GrandCrab.SA!MSR infection?

In this post you will discover about the definition of Ransom:Win32/GrandCrab.SA!MSR as well as its adverse impact on your computer. Such ransomware are a type of malware that is specified by online frauds to require paying the ransom money by a sufferer.

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Most of the instances, Ransom:Win32/GrandCrab.SA!MSR infection will certainly instruct its victims to initiate funds move for the objective of neutralizing the amendments that the Trojan infection has actually presented to the victim’s device.

Ransom:Win32/GrandCrab.SA!MSR 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.
  • The binary likely contains encrypted or compressed data. In this case, encryption is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Crashed cuckoomon during analysis. Report this error to the Github repo.;
  • Anomalous binary characteristics. This is a way of hiding virus’ code from antiviruses and virus’ analysts.
  • Ciphering the documents situated on the target’s hard drive — so the target can no longer make use of the information;
  • Preventing routine accessibility 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.


The most typical networks through which Ransom:Win32/GrandCrab.SA!MSR are injected are:

  • By means of phishing emails;
  • As an effect of customer winding up on a resource that holds a destructive software;

As quickly as the Trojan is efficiently injected, it will either cipher the information on the target’s computer or avoid the gadget from functioning in an appropriate way – while likewise placing a ransom money note that discusses the demand for the victims to effect the settlement for the purpose of decrypting the files or recovering the documents system back to the preliminary problem. In a lot of instances, the ransom money note will certainly turn up when the client reboots the PC after the system has currently been damaged.

Ransom:Win32/GrandCrab.SA!MSR distribution networks.

In numerous edges of the world, Ransom:Win32/GrandCrab.SA!MSR grows by jumps and bounds. However, the ransom notes as well as tricks of obtaining the ransom quantity might vary depending on specific local (local) setups. The ransom notes and also tricks of extorting the ransom amount might differ depending on certain regional (local) setups.

Ransomware injection

For instance:

    Faulty informs regarding unlicensed software program.

    In particular areas, the Trojans usually wrongfully report having spotted some unlicensed applications enabled on the victim’s device. The alert after that requires the individual to pay the ransom.

    Faulty statements regarding prohibited material.

    In nations where software application piracy is less prominent, this approach is not as effective for the cyber scams. Alternatively, the Ransom:Win32/GrandCrab.SA!MSR popup alert may wrongly claim to be deriving from a law enforcement establishment and will report having located youngster pornography or other illegal information on the tool.

    Ransom:Win32/GrandCrab.SA!MSR popup alert may wrongly assert to be deriving from a regulation enforcement organization as well as will certainly report having located kid pornography or other unlawful information on the tool. The alert will similarly have a demand for the customer to pay the ransom.

Technical details

File Info:

crc32: 7176DC1D
md5: 6553b9502a1d4d2b336f85459e4d9339
name: 6553B9502A1D4D2B336F85459E4D9339.mlw
sha1: ea000e56b5c90f3920406f5423c4ac8e803d92bb
sha256: 53923323441e9e9a1506dd2730993520e8f323039e4c1a47602715b3a65a5b13
sha512: b1e0f8a694f174f4451afdc85d090da7ecee12b08528fda5c74fa94e80afb345b8e6ec3a1e8d2a13cca9ad6bcb723cdcef12d12978bad04765b30a0777fd36c0
ssdeep: 1536:pKXT6lkPQZLjCH0VQkWZ10Q9U2vnF2GsQxtivRBJQJVsWN5m1KwiZwNZCemQBRj:8PACH0VQkWZ67j82BJwV5xwiqNZLmQ7
type: PE32 executable (GUI) Intel 80386, for MS Windows

Version Info:

0: [No Data]

Ransom:Win32/GrandCrab.SA!MSR also known as:

GridinSoft Trojan.Ransom.Gen
Bkav W32.FamVT.DisbukLZ.Trojan
K7AntiVirus Trojan ( 00532fd01 )
Elastic malicious (high confidence)
DrWeb Trojan.Encoder.24384
Cynet Malicious (score: 100)
CAT-QuickHeal Trojan.Chapak.ZZ5
ALYac Gen:Variant.Zusy.287607
Cylance Unsafe
Zillya Trojan.Chapak.Win32.4975
Sangfor Trojan.Win32.Save.a
CrowdStrike win/malicious_confidence_100% (W)
Alibaba Ransom:Win32/GrandCrab.b4997b8c
K7GW Trojan ( 00532fd01 )
Cybereason malicious.02a1d4
Cyren W32/S-79ffeeec!Eldorado
Symantec Packed.Generic.525
ESET-NOD32 a variant of Win32/Kryptik.GHFR
APEX Malicious
Avast Win32:Malware-gen
ClamAV Win.Packed.Phorpiex-9810805-1
Kaspersky HEUR:Trojan.Win32.Chapak.gen
BitDefender Gen:Variant.Zusy.287607
NANO-Antivirus Trojan.Win32.Encoder.fedfdj
ViRobot Trojan.Win32.GandCrab.95744
MicroWorld-eScan Gen:Variant.Zusy.287607
Tencent Win32.Trojan.Generic.Wnmh
Ad-Aware Gen:Variant.Zusy.287607
Sophos Mal/Generic-S + Mal/GandCrab-G
Comodo TrojWare.Win32.Magniber.FGH@7nyazg
BitDefenderTheta Gen:NN.ZexaF.34678.fyW@aC9uYCci
VIPRE Trojan.Win32.Generic!BT
McAfee-GW-Edition BehavesLike.Win32.Generic.nh
FireEye Generic.mg.6553b9502a1d4d2b
Emsisoft Gen:Variant.Zusy.287607 (B)
SentinelOne Static AI – Suspicious PE
Jiangmin Trojan.GandCrypt.ds
Webroot W32.Trojan.Gen
Avira HEUR/AGEN.1103340
eGambit Unsafe.AI_Score_99%
Microsoft Ransom:Win32/GrandCrab.SA!MSR
AegisLab Trojan.Win32.Generic.4!c
GData Gen:Variant.Zusy.287607
AhnLab-V3 Trojan/Win32.Gandcrab.R229506
Acronis suspicious
McAfee GenericRXFP-BC!6553B9502A1D
MAX malware (ai score=100)
VBA32 BScope.TrojanRansom.GandCrypt
Malwarebytes Trojan.MalPack
Panda Trj/CI.A
Rising Trojan.Kryptik!1.B2AC (CLOUD)
Ikarus Trojan-Ransom.GandCrab
Fortinet W32/GenKryptik.CNAR!tr
AVG Win32:Malware-gen
Paloalto generic.ml
Qihoo-360 Win32/Ransom.GandCrab.HwoCEpsA

How to remove Ransom:Win32/GrandCrab.SA!MSR 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 Ransom:Win32/GrandCrab.SA!MSR 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 Ransom:Win32/GrandCrab.SA!MSR you can always ask me in the comments for getting help.

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  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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