Backdoor:Win32/Simda!B

Spectating the Backdoor:Win32/Simda!B malware detection means that your computer is in big danger. This malware can correctly be identified as ransomware – sort of malware which ciphers your files and forces you to pay for their decryption. Stopping it requires some peculiar steps that must be done as soon as possible.

Backdoor:Win32/Simda!B detection is a virus detection you can spectate in your system. It generally shows up after the preliminary procedures on your computer – opening the suspicious email messages, clicking the banner in the Internet or setting up the program from untrustworthy sources. From the second it shows up, you have a short time to take action before it starts its destructive activity. And be sure – it is much better not to await these destructive things.

What is Backdoor:Win32/Simda!B virus?

Backdoor:Win32/Simda!B is ransomware-type malware. It looks for the files on your disk, encrypts it, and then 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 modifies the networking settings in order to prevent you from checking out the elimination guides or downloading the antivirus. Sometimes, Backdoor:Win32/Simda!B can also block the setup of anti-malware programs.

Backdoor:Win32/Simda!B Summary

In summary, Backdoor:Win32/Simda!B ransomware actions in the infected computer are next:

  • Behavioural detection: Executable code extraction – unpacking;
  • Yara rule detections observed from a process memory dump/dropped files/CAPE;
  • Creates RWX memory;
  • A process attempted to delay the analysis task.;
  • Dynamic (imported) function loading detected;
  • Performs HTTP requests potentially not found in PCAP.;
  • Starts servers listening on 0.0.0.0:20017;
  • Enumerates running processes;
  • Reads data out of its own binary image;
  • CAPE extracted potentially suspicious content;
  • Drops a binary and executes it;
  • Authenticode signature is invalid;
  • Deletes its original binary from disk;
  • Network activity contains more than one unique useragent.;
  • Fake User-Agent detected;
  • Installs itself for autorun at Windows startup;
  • Attempts to modify proxy settings;
  • Harvests cookies for information gathering;
  • Encrypting the files located on the target’s disk drives — so the victim cannot use these documents;
  • Blocking the launching of .exe files of anti-malware apps
  • Blocking the launching of installation files of anti-malware programs

Ransomware has actually been a major problem for the last 4 years. It is challenging to picture a more harmful malware for both individuals and businesses. The algorithms utilized in Backdoor:Win32/Simda!B (generally, RHA-1028 or AES-256) are not hackable – with minor exclusions. To hack it with a brute force, you need more time than our galaxy currently exists, and possibly will exist. However, that virus does not do all these unpleasant things without delay – it may take up to several hours to cipher all of your documents. Therefore, seeing the Backdoor:Win32/Simda!B detection is a clear signal that you have to begin the clearing process.

Where did I get the Backdoor:Win32/Simda!B?

Standard tactics of Backdoor:Win32/Simda!B spreading are typical for all other ransomware examples. Those are one-day landing websites where users are offered to download the free program, so-called bait emails and hacktools. Bait e-mails are a relatively modern strategy in malware spreading – you get the e-mail that mimics some regular notifications about deliveries or bank service conditions updates. Inside of the e-mail, there is a malicious MS Office file, or a link which leads to the exploit landing page.

Malicious email spam

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

Preventing it looks fairly easy, however, still demands tons of attention. Malware can hide in different spots, and it is far better to prevent it even before it invades your system than to trust in an anti-malware program. Standard cybersecurity knowledge is just an important thing in the modern-day world, even if your relationship with a computer remains on YouTube videos. That may save you a lot of time and money which you would spend while seeking a fixing guide.

Backdoor:Win32/Simda!B malware technical details

File Info:

name: 4CB78BFE4EE2A0D22C3E.mlwpath: /opt/CAPEv2/storage/binaries/4ad2b53551be9641cca3e2a86b17607e60cdc74ddfd738bc409d4696d23b41dbcrc32: E9FA26E4md5: 4cb78bfe4ee2a0d22c3e5eb563afa6dcsha1: 81a7b838c9f0d809f7e268d8f4eba2e2a9726150sha256: 4ad2b53551be9641cca3e2a86b17607e60cdc74ddfd738bc409d4696d23b41dbsha512: 18726f34fa473fc5c7a70549ccd81572f9dddea81566f7e51a31063da89acd3a8f505e758644f86f97ead38601635b6de4680f30697858d143a1c58a5ade979bssdeep: 6144:l45rA5FSkJY8R/kpM3kRaWV/wEsNbqw8QlRTFiPurp+EStS3sth:vFSkB/kBubqw8vm+EKS3stype: PE32 executable (GUI) Intel 80386, for MS Windowstlsh: T1C2747D2AA4508176E0F4223051FA7A6B2DBD2E6443ED28D377646E8D6C742F372391DFsha3_384: 3709a16adf22111f02ec5a49813475ea27165e01ab9fb1de3007bbafc1ad1d6271d0b880a80bce0a6d1f7c9fdef64383ep_bytes: 558bec83e4f881ec0c01000053565768timestamp: 2011-05-26 03:20:41

Version Info:

0: [No Data]

Backdoor:Win32/Simda!B also known as:

Bkav W32.AIDetect.malware2
Elastic Windows.Trojan.Zeus
MicroWorld-eScan Gen:Variant.Ransom.Sodinokibi.66
FireEye Generic.mg.4cb78bfe4ee2a0d2
McAfee GenericRXOK-SU!4CB78BFE4EE2
Cylance Unsafe
VIPRE Gen:Variant.Ransom.Sodinokibi.66
Sangfor [ARMADILLO V1.71]
CrowdStrike win/malicious_confidence_100% (D)
Symantec ML.Attribute.HighConfidence
tehtris Generic.Malware
ESET-NOD32 a variant of Win32/Spy.Shiz.NBX
APEX Malicious
ClamAV Win.Trojan.Generic-6323528-0
Kaspersky VHO:Backdoor.Win32.Shiz.gen
BitDefender Gen:Variant.Ransom.Sodinokibi.66
Avast Win32:Shiz-JT [Trj]
Ad-Aware Gen:Variant.Ransom.Sodinokibi.66
Sophos ML/PE-A + Mal/Emogen-Y
Comodo TrojWare.Win32.Spy.Shiz.AB@6t6eqm
DrWeb Trojan.PWS.Ibank.468
TrendMicro Possible_KULUOZ-2
McAfee-GW-Edition BehavesLike.Win32.Backdoor.fh
Trapmine malicious.high.ml.score
Emsisoft Gen:Variant.Ransom.Sodinokibi.66 (B)
SentinelOne Static AI – Malicious PE
Jiangmin Trojan/Invader.fju
Avira TR/Hijacker.Gen
MAX malware (ai score=85)
Microsoft Backdoor:Win32/Simda.gen!B
GData Win32.Trojan.Spyshiz.A
Cynet Malicious (score: 100)
Acronis suspicious
VBA32 BScope.TrojanPSW.Ibank
ALYac Gen:Variant.Ransom.Sodinokibi.66
Malwarebytes Simda.Backdoor.Stealer.DDS
TrendMicro-HouseCall Possible_KULUOZ-2
Rising [email protected] (RDML:c7+vovkmVbqZyh7s0iOemw)
Yandex Trojan.GenAsa!Cn3YwpEJMrc
Ikarus Backdoor.Win32.Simda
MaxSecure Trojan.Malware.300983.susgen
BitDefenderTheta AI:Packer.6252219F1E
AVG Win32:Shiz-JT [Trj]
Cybereason malicious.e4ee2a

How to remove Backdoor:Win32/Simda!B?

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.

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