Ransom:Win32/StopCrypt.SAH!MTB

What is the Win32:Evo-gen [Trj] virus?
Written by Robert Bailey
Seeing the Ransom:Win32/StopCrypt.SAH!MTB malware detection usually means that your system is in big danger. This virus can correctly be named as ransomware – sort of malware which encrypts your files and asks you to pay for their decryption. Stopping it requires some specific steps that must be taken as soon as possible.
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Ransom:Win32/StopCrypt.SAH!MTB detection is a malware detection you can spectate in your system. It often shows up after the preliminary actions on your computer – opening the dubious email messages, clicking the banner in the Internet or mounting the program from untrustworthy resources. From the moment it shows up, you have a short time to act until it begins its harmful activity. And be sure – it is much better not to await these harmful effects.

What is Ransom:Win32/StopCrypt.SAH!MTB virus?

Ransom:Win32/StopCrypt.SAH!MTB is ransomware-type malware. It looks for the files on your disk drive, encrypts it, and after that asks you to pay the ransom for receiving the decryption key. Besides making your files locked, this malware additionally does a lot of damage to your system. It changes the networking settings in order to stop you from looking for the elimination guides or downloading the anti-malware program. In rare cases, Ransom:Win32/StopCrypt.SAH!MTB can even block the launching of anti-malware programs.

Ransom:Win32/StopCrypt.SAH!MTB Summary

Summarizingly, Ransom:Win32/StopCrypt.SAH!MTB virus actions in the infected computer are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • Executed a command line with /C or /R argument to terminate command shell on completion which can be used to hide execution;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • Drops a binary and executes it;
  • Authenticode signature is invalid;
  • Uses Windows utilities for basic functionality;
  • Behavioural detection: Injection (Process Hollowing);
  • Behavioural detection: Injection (inter-process);
  • Behavioural detection: Injection with CreateRemoteThread in a remote process;
  • CAPE detected the Tofsee malware family;
  • Deletes executed files from disk;
  • Attempts to interact with an Alternate Data Stream (ADS);
  • Uses suspicious command line tools or Windows utilities;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Encrypting the files located on the target’s drive — so the victim cannot use these files;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of security tools

Ransomware has been a nightmare for the last 4 years. It is difficult to realize a more damaging virus for both individuals and businesses. The algorithms utilized in Ransom:Win32/StopCrypt.SAH!MTB (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need a lot more time than our galaxy currently exists, and possibly will exist. However, that virus does not do all these terrible things instantly – it may require up to a few hours to cipher all of your files. Hence, seeing the Ransom:Win32/StopCrypt.SAH!MTB detection is a clear signal that you need to begin the removal procedure.

Where did I get the Ransom:Win32/StopCrypt.SAH!MTB?

Standard tactics of Ransom:Win32/StopCrypt.SAH!MTB injection are usual for all other ransomware examples. Those are one-day landing web pages where users are offered to download the free program, so-called bait emails and hacktools. Bait emails are a relatively new method in malware distribution – you get the email that imitates some standard notifications about deliveries or bank service conditions updates. Within the email, there is an infected MS Office file, or a web link which opens the exploit landing site.

Malicious email spam

Malicious email message. This one tricks you to open the phishing website.

Preventing it looks pretty easy, but still needs a lot of focus. Malware can hide in various places, and it is far better to stop it even before it goes into your PC than to rely on an anti-malware program. General cybersecurity knowledge is just an important item in the modern-day world, even if your relationship with a PC stays on YouTube videos. That may save you a lot of money and time which you would spend while looking for a fix guide.

Ransom:Win32/StopCrypt.SAH!MTB malware technical details

File Info:

name: C8F7BA591CA362100A48.mlw
path: /opt/CAPEv2/storage/binaries/5c3963103fae99064610b846020946eda5b34c1f3361cc11b41c8396836bc4eb
crc32: A32829C2
md5: c8f7ba591ca362100a48c1e267318f00
sha1: 0e923ab942d30b3ab53d448f06edf867c3c3def1
sha256: 5c3963103fae99064610b846020946eda5b34c1f3361cc11b41c8396836bc4eb
sha512: 9d09db8e7914a44b779692cbeed4db37a1f8e97aa94a7e489f5a407e205bc815ff17127cc429e410373ee6e986e665ea04911dce8db0eb5789a430d8bc4aad0a
ssdeep: 3072:L6ynLLNjXk006OuNf8DhownFVRjmbHMuubfE5Uq9hG02KJ:GKLLNDn062DFnFXK+fEuq9d2o
type: PE32 executable (GUI) Intel 80386, for MS Windows
tlsh: T10154D0D17D91C072C90341B7D825CEE4AEBEBC6316A9899B3315377F2E307D2AB66205
sha3_384: 053695e57d9d679f376e46929105af4ac4e2ea163a6b5e47fabd27dd31220ea8fad97dbfb026852f5ab1b0100c3fca9c
ep_bytes: e8e6350000e979feffff2da403000074
timestamp: 2022-04-04 18:09:10

Version Info:

FilesVersion: 5.98.72.24
InternalNames: BlameProduction
ProductName: Hyper
Translation: 0x0400 0x043b

Ransom:Win32/StopCrypt.SAH!MTB also known as:

BkavW32.AIDetectNet.01
tehtrisGeneric.Malware
MicroWorld-eScanTrojan.GenericKD.65724737
ClamAVWin.Packer.pkr_ce1a-9980177-0
FireEyeGeneric.mg.c8f7ba591ca36210
ALYacTrojan.GenericKD.65724737
Cylanceunsafe
SangforTrojan.Win32.Save.a
K7AntiVirusTrojan ( 00516fdf1 )
K7GWTrojan ( 00516fdf1 )
Cybereasonmalicious.942d30
SymantecML.Attribute.HighConfidence
Elasticmalicious (high confidence)
ESET-NOD32a variant of Win32/Kryptik.HSWQ
APEXMalicious
Paloaltogeneric.ml
CynetMalicious (score: 100)
KasperskyHEUR:Backdoor.Win32.Tofsee.gen
BitDefenderTrojan.GenericKD.65724737
AvastWin32:BotX-gen [Trj]
EmsisoftTrojan.GenericKD.65724737 (B)
F-SecureTrojan.TR/AD.Tofsee.thjaa
DrWebTrojan.PWS.Stealer.35775
VIPRETrojan.GenericKD.65724737
TrendMicroRansom.Win32.STOP.SMYXDBTB.hp
McAfee-GW-EditionBehavesLike.Win32.Lockbit.dm
Trapminemalicious.moderate.ml.score
SophosTroj/Krypt-VK
SentinelOneStatic AI – Malicious PE
GDataTrojan.GenericKD.65724737
AviraTR/AD.Tofsee.thjaa
ArcabitTrojan.Generic.D3EAE141
ZoneAlarmHEUR:Backdoor.Win32.Tofsee.gen
MicrosoftRansom:Win32/StopCrypt.SAH!MTB
GoogleDetected
AhnLab-V3Trojan/Win.Generic.R560428
McAfeeArtemis!C8F7BA591CA3
MAXmalware (ai score=83)
VBA32BScope.Trojan.Downloader
MalwarebytesTrojan.MalPack.GS
RisingTrojan.Kryptik!1.E2E3 (CLASSIC)
IkarusTrojan-Ransom.GandCrab
MaxSecureTrojan.Malware.300983.susgen
FortinetW32/Kryptik.HSXC!tr
AVGWin32:BotX-gen [Trj]
PandaTrj/Genetic.gen
CrowdStrikewin/malicious_confidence_100% (D)

How to remove Ransom:Win32/StopCrypt.SAH!MTB?

Ransom:Win32/StopCrypt.SAH!MTB malware is extremely hard to erase manually. It stores its documents in several locations throughout the disk, and can recover itself from one of the elements. Additionally, countless changes in the windows registry, networking settings and also Group Policies are fairly hard to discover and return to the initial. It is far better to utilize a specific program – exactly, an anti-malware tool. GridinSoft Anti-Malware will fit the best for virus removal reasons.

Why GridinSoft Anti-Malware? It is very lightweight and has its detection databases updated nearly every hour. Additionally, it does not have such bugs and exposures as Microsoft Defender does. The combination of these facts makes GridinSoft Anti-Malware perfect for getting rid of malware of any kind.

Remove the viruses with GridinSoft Anti-Malware

  • Download and install GridinSoft Anti-Malware. After the installation, you will be offered to perform the Standard Scan. Approve this action.
  • Gridinsoft Anti-Malware during the scan process

  • Standard scan checks the logical disk where the system files are stored, together with the files of programs you have already installed. The scan lasts up to 6 minutes.
  • GridinSoft Anti-Malware scan results

  • When the scan is over, you may choose the action for each detected virus. For all files of [SHORT_NAME] the default option is “Delete”. Press “Apply” to finish the malware removal.
  • GridinSoft Anti-Malware - After Cleaning
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About the author

Robert Bailey

I'm Robert Bailey, a passionate Security Engineer with a deep fascination for all things related to malware, reverse engineering, and white hat ethical hacking.

As a white hat hacker, I firmly believe in the power of ethical hacking to bolster security measures. By identifying vulnerabilities and providing solutions, I contribute to the proactive defense of digital infrastructures.

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