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Fabian Wosar of Emisoft has released a free decryptor for the Nemucod .CRYPTED or Decrypt.txt ransomware. A decryptor was previously released by one of our users, macomaco, but required Python in order to generate the decryption key. When Fabian analyzed the ransomware, he saw that it utilized a similar encryption scheme as a previous ransomware and was able to release a Windows decryptor.This ransomware is distributed via the Nemucod Trojan.Downloader, which is sent via email as a javascript (.JS) attachment. When a user opens this attachment, the javascript will execute and download further malware to the victim's computer. Recently, one of the malware infections that is being downloaded by Nemucod is the .CRYPTED ransomware, which will encrypt your data and then demand ~.4 bitcoins in order to get a decryption key.Decrypting Nemucod's .CRYPTED RansomwareIf you are infected with this ransomware, simply download decrypt_nemucod.exe from the following link and save it on your desktop:In order to find your decryption key, you need to drag an encrypted file and unencrypted version of the same file onto the decrypt_nemucod.exe icon at the same time. To do this, you would select both the encrypted and unencrypted version of a file and then drag them both onto the decryptor. If you do not have an an original version of one of your encrypted files, you can usually use a sample picture found in the C:\Users\Public\Pictures folder. Once you determine the key used to encrypt one of your files, you can then use that key to decrypt ALL other encrypted files on your computer.To show what I mean about dragging both files at the same time, see the image below. To generate the key, I created a folder that contains an encrypted PNG file, a unencrypted version of the same PNG file, and the decrypt_nemucod.exe program. I then dragged both the regular PNG file and the encrypted one onto the executable at the same time.How to drag the files onto the DecrypterAfter you drag the files onto the decrypted, the program will start and you may be presented with a UAC prompt. Please click on Yes

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(TA551) Gozi sampleX-Force researchers also found a Gozi sample using an ITG23 crypter on April 7, 2022 (see below). Gozi is also a banking trojan first appearing in 2007 that has evolved into a multi-module, multi-purpose malware. However, unlike the other banking trojans discussed so far, the Gozi source code has leaked and the malware is not operated or developed by a single group. The threat actor Hive0106 (aka TA551) was likely responsible for this campaign delivering Gozi. We assess that Bentley and his team likely crypted this Gozi sample on behalf of this group, with which they have an established relationship.The cryptersCrypters are applications designed to encrypt and obfuscate malware to protect it from anti-virus scanners and malware analysts. The crypting process generally involves encrypting a pre-compiled malware payload, such as an EXE, DLL file, or shellcode, and embedding it within a secondary binary, known as a ‘stub’, which contains code to decrypt and execute the malicious payload. The stubs generally take the form of binaries, such as Exe or DLL files, are often either polymorphic or updated frequently in order to evade signature-based detection methods, and usually make use of code obfuscation techniques.When the crypted binary is executed, the stub code will extract the embedded payload, decrypt it, load it into memory and execute it. As a result of this behavior, the crypted binary containing the stub code may also be referred to as a ‘loader’ or ‘in-memory dropper’.In order to protect their payloads many crypters may also include additional functionality to detect sandbox environments, hinder AV scanners, escalate privileges, or perform other basic system checks. It’s common for crypters to utilize a high level of code obfuscation within the stubs, and the majority also employ polymorphic techniques such as metaprogramming to ensure that each crypted binary is unique and thus make it harder to identify via signature-based detection methods.Another common technique is for the crypter to disguise the malware as a benign executable, and to this end, they will often use source code from legitimate applications as a template for the stub binary, or include strings or

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Ransomware File Decryptor is a tool developed by Trend Micro to recover files infected by specific types of ransomware. Please note that this tool may not work for all versions of ransomware. Some attackers are updating their ransom programs after learning that there are free tools available to recover encrypted files. Please see the list of ransomware with corresponding versions and filenames that this tool can handle.777 – (file name).777 | Example: myfile.doc will be myfile.doc.777AutoLocky – (file name).locky | Expample: myfile.jpg will be myfile.jpg.lockyBadBlock (file name)CERBER V1 – (10 random characters).cerber | Example: myfile.jpg will be Thd8Yhns7R.cerberChimera – (file name).crypt | Example: myfile.doc will be myfile.doc.cryptCryptXXX V1, V2, V3 – (file name}.crypt, .cryp1, .crypz, or 5 random characters | Example: myfile.jpg will be myfile.jpg.crypt or myfile.jpg.G5Th4sCryptXXX V4, V5 – (MD5 Hash).5 random charactersNemucod – (file name).crypted | Exmaple: myfile.doc will be myfile.doc.cryptedStampado – (file name).locked | Example: myfile.jpg will be myfile.jpg.lockedSNSLocker – (file name).RSNSLocked | Example: myfile.doc will be myfile.doc.RSNSLockedTeslaCrypt V1 – (file name).ECC | Example: myfile.jpg will be myfile.jpg.ECCTeslaCrypt V2 – (file name).VVV, .CCC, .ZZZ, .AAA, .ABC, .XYZ | Example: myfile.doc will be myfile.doc.VVV or myfile.doc.XYZTeslaCrypt V3 – (file name).XXX, .TTT, .MP3, or .MICRO | Example: myfile.jpg will be myfile.jpg.XXXTeslaCrypt V4 – No changes on file name and extensionXORIST – (file name).xorist or random extension | Example: myfile.doc will be myfile.doc.xoristXORBAT – (file name}.crypted | Example: myfile.jpg will be myfile.jpg.cryptedDisclaimer: By downloading and using this tool, you are considered to have read the publisher’s disclaimer and agreed to. Download Crypted-Email latest version for Windows free to try. Crypted-Email latest update: Ma Download Crypted-Email latest version for Windows free to try. Crypted-Email latest update: Ma

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Seeing an increase in popularity with malware developers. The payload is stored in the .rdata section of the loader and encrypted using a XOR based algorithm with two keys applied in multiple iterations. The crypter supports both shellcode and PE payloads, with shellcode payloads loaded into memory and executed directly, and PE payloads loaded in a similar manner to Galore crypter, using the Reflective DLL Injection technique.Rustic crypted samples were first observed in early September 2021 and it has been used with malware including BazarLoader, IcedID, Cobalt Strike, Quantum, as well as implants from Sliver which is a post-exploitation framework written in Go.Figure 7 — Rustic stub loader code responsible for loading and decrypting the payloadFigure 8 — Strings within a Rustic-crypted sample indicate that the binary was written using the Rust languageSelect samples using the Rustic crypter:Sample FamilySHA256 HashSliver45aa8efb6b1a9a0e0091040bb99a7c37d346aaf306fa4e31e9d5d9f0fef56676Cobalt Strikee75fce425df2e878c7938cdf86c8e4bde541c68f75d55edb62a670af52521740BazarLoader8d84152b69161bf5abb2f80fef310ec92cc8b1cb23dff18eebd8d039cda8f8adIcedIDbec6dc7f7bfbded59d1a9290105e13ac91cf676ef5a4513bacbfcabf73630202Quantumfd7ca7af9b2b6c5ffdb3206d647301de8bea33a69679e117be30e9a601c5dea2Scroll to view full table TronTron crypter first appeared in the wild in September 2021 when it was used to crypt Trickbot binaries associated with gtag rob132. Since then, it has been observed with payloads within Emotet, Trickbot, BazarLoader, IcedID, Conti and Cobalt Strike. Of note, Tron is the crypter identified in this article from CERT-UA.Tron crypted binaries have their payload usually stored within the .text section of the stub loader which, upon execution, unpacks and decompresses the payload, and then loads it into memory and executes it. The decompression of the payload is performed using the Zlib library; however, the unpacking appears to be performed using code originating from an obscure Github project called Megatron ( specifically a module called ioBuffer.cpp which implements basic buffer manipulation and unpacking functions. The Megatron project has since been taken down but previously strings from the source code in Github could be observed within the unpacking functions in the crypted binaries.Figure 9 — The source code of ioBuffer.cpp as seen on GithubThe above image shows the source code of ioBuffer.cpp as seen on Github, specifically a function named inBuffer::get_8() is shown, which contains the error string “inBuffer::get_8: noenough“. This same function and error string can be seen within the unpacking functions of the

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Restricted set of bytes in order to keep the entropy low. Entropy measures the level of randomness in the data, and many encryption algorithms will generate encrypted data with a distinctively high entropy value, which is easily detectable by binary analysis tools. By using an algorithm that outputs lower-entropy data, the encrypted payload is less easy to detect by automated systems.Figure 6 — Pear crypted sample with distinctive encrypted payload utilizing a restricted byte set.Select samples using the Pear crypter:Sample FamilySHA256 HashIcedID9f4bdbfec9f091e985e153a1597fc271abd0320c60dfe37dc3e7d81e5d18ad83BazarLoader26cac671e215d88b5070af7d94200588d2b7c414a6e8debf7370b993fcfffb23Colibrib1fc2855f5579f02ac6d03c2d20e85948e9609fd769389addb8ce5986b1f8ecdTrickbote2ba0567ac236a24bfd4df321ae7860e8fe2810dbd088e0e90d67167c1ccd4c5Scroll to view full table LoreLore crypter has been in use since at least May 2021 and has been observed with payloads including Emotet, Trickbot, BazarLoader, IcedID and Cobalt Strike. This crypter stores the payload as a BITMAP type resource, with a 103-byte bitmap file header added to the start of the payload data. Upon execution, the stub code loads the resource, removes the bitmap header, and decrypts the remaining data using XOR and a hardcoded key. The payload is then loaded into memory and executed. The crypter originally appeared to be designed for use with PE payloads, and so shellcode-based payloads were wrapped in an additional second stage loader.Lore crypted binaries often include a lot of extraneous imports and junk functions in an attempt to obscure the location of the payload decryption and loading code from analysts. This loading code instead uses API hashes to retrieve handles to the API functions it requires, so the extraneous imports can generally be ignored by the analyst.A handful of Lore crypted samples were identified containing the following PDB paths:204506c69824371017f482e88f9fbb14cfd0fbc17233fa8d3ffbf4f527e20af5 c:\jenkins\workspace\crypter5_generic_exe\Bin\x64\Release\MFC_Stub.pdbd1a12e52d9fcc57580146370933a3f9eb027c5fec972abc9ac2f2b7d9f94e0d3 c:\jenkins\workspace\crypter5_shellcode_64_exe\Bin\x64\Release\MFC_Stub.pdb41c56e92efd01a553d0faf39ccb440c7e84d32531335c262572d6a01bf7f70c8 c:\jenkins\workspace\crypter5_generic_exe\Bin\x86\Release\MFC_Stub.pdb615f9a5517e71648a0780c186af8642e2848589d6962bc12ff34c0c54b650df5 c:\jenkins\workspace\crypter5_shellcode_64_exe\Bin\x64\Release\MFC_Stub.pdbThese paths provide evidence of a Jenkins server being used for crypting operations and also suggest that it likely contains a number of different crypters, with crypter5 being Lore Crypter. This is corroborated by the PDB path found within some Error crypted samples, detailed further below, which refer to it as ‘crypter7’.The directory names ‘crypter5_generic_exe’ and ‘crypter5_shellcode_64_exe’ indicate that different configurations of the crypter stubs were likely compiled for different types of payloads. In this case, the two samples containing the reference ‘crypter5_shellcode_64_exe’ are both 64-bit executable files that

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Crypted binary.The payload data is split into chunks which are delimited with the bytes ‘c3 cc cc cc’, where the number of ‘cc’ bytes varies based on alignment. Bytes used to calculate the size of each chunk are added at the start of each chunk. The unpacking code parses the payload data, calculating the size of each chunk and appending the chunk data to the output buffer whilst checking for and discarding the 0xc3 and 0xcc padding bytes.The compressed and decompressed sizes are then parsed from the start of the unpacked data, and the zlib.decompress function is used to decompress the payload. One version of this crypter stores the payload in multiple parts, which are unpacked individually and then joined together before decompression.Several other variants of the Tron crypter have also been observed. One example contains the same ioBuffer unpacking functions, but the payloads are decrypted using XOR rather than decompressed using Zlib. Some variants also have the payload stored in the .data section, and others may encode the payload in a numeric ascii format.Some samples were identified containing path strings for header files such as the following:Z:\cr4\ballast\5\core\src\BitArray.hZ:\cr\crypter4\ballast\3\openjp2\opj_intmath.hConsidering the PDB strings identified within Lore and Error crypted samples, these path strings may indicate that Tron crypter is referred to as crypter4 within the group.Select samples using the Tron crypter:Sample FamilySHA256 HashCobalt Strike44e2057c7466881a61e3b542ce055b3d54aa7d88040ce879a915e20ed996d097Conti38784c635de9716c09a6f11f4d76f6402b5f6638f1614ed929c7de136bb5301aEmotet8d8138c23bf514a984918f7b5c5a7501e91b2c058574b7ce0b9ccbe638e82387Trickbotfd083bc2dbc3426a332eaf861dea03c648ad04cb73ba8f09504c970af9134898BazarLoaderb88382ef06808155253f631a06e31024436e19d5bffd34f9b03906295e82de52IcedID2b9cba43290c9d4cc2d6a47432ddac5752c63e5ac519c2056ba466580424ed3bScroll to view full table HexaHexa crypter compresses and RC4 encrypts its payload, and then encodes it as a hexadecimal ascii string to reduce entropy. This is then stored in the data sections of the stub binary, with some variants splitting the payload across two or three different sections. Upon execution the payload is reconstructed, decompressed and decrypted and then copied to a newly created memory section and execution transferred to the payload. Portable executable (PE) payloads may be preceded by a shellcode loader which is responsible for properly mapping the PE file into memory and executing it.Hexa makes use of code obfuscation techniques to hinder analysis efforts including splitting the code into many tiny blocks separated by jumps, and the inclusion of blocks of junk data.Hexa crypted samples

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Concurrent clients, 1kB of HTTP payload returned, Keep-Alive turned on, 10 seconds (establishes exactly 1000 TCP connections that are serving HTTP requests).Test #2.1 (with TLS): Static 1kB content throughput test1000 concurrent clients, 1kB of HTTP payload returned, Keep-Alive turned on, 10 seconds (establishes exactly 1000 TCP connections that are serving HTTP requests).Only net/http, fasthttp and tcpserver have been benchmarked, as evio and gnet do not support TLS.Test #3: AES-128-CBC crypted 1kB content massive connections test1000 concurrent clients, 1kB of AES-128-CBC crypted HTTP payload returned, Keep-Alive turned off, 10 seconds (each HTTP request is a new connection).Test #4: AES-128-CBC crypted 1kB content throughput test1000 concurrent clients, 1kB of AES-128-CBC crypted HTTP payload returned, Keep-Alive turned on, 10 seconds (establishes exactly 1000 TCP connections that are serving HTTP requests).Test #5: Static 128 byte content throughput test with additional 1ms sleep1000 concurrent clients, 128 bytes of HTTP payload returned and 1 ms sleep, Keep-Alive turned on, 10 seconds (establishes exactly 1000 TCP connections that are serving HTTP requests).Test #6: Static 16kB content massive connections test1000 concurrent clients, 16kB of HTTP payload returned, Keep-Alive turned off, 10 seconds (each HTTP request is a new connection).Why?I always find it enlightening to know why someone did something. That's why this section is here.When I started writing a new high performance SOCKS5 and HTTP proxy server to replace danted in my setup, I realized that I needed some functionality that goes beyond the core listen-accept-handle logic like graceful restart/shutdown and strict error handling.I evaluated evio and later gnet but that reminded me of doing async IO in PHP a decade ago which might have been a necessity there but Go has it's own event loop and I was curious why one would re-implement all this in a client library and relinquish the way you write network code in Go (basically by using a goroutine per connection) – the answer is was speed.I started benchmarking the mentioned libraries against a naive go handle(...) approach and it soon turned out that spawning a new goroutine for each connection was simply too expensive.After creating a new goroutine worker pool (modeled after the one found in fasthttp) I was able to reach numbers (in reqs/sec) that were on par with these libraries.Now, after some rounds of optimization, tcpserver is faster in almost all benchmarks than any other library I've come across and you get zero-copy and TLS "for free" – simply by using Go's own net/* functionality!Licensetcpserver is available under the MIT license.. Download Crypted-Email latest version for Windows free to try. Crypted-Email latest update: Ma

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Not free, so expect to pay a reasonable price for our decrypting services. No exceptions will be made. In the subject line of your email include the id number, which can be found in the file name of all encrypted files. It is in your interest to respond as soon as possible to ensure the restoration of your files. P.S. only in case you do not receive a respons from the first email address within 48 hours, please use this alternative email address: [email protected] you believe virus-encoder may have affected files stored on your Network Drives, edit RakhniDecryptor's parameters:Check the 'Network Drives' option (unless you are 100% sure that all of your files will be decrypted, you should never place a checkmark in the 'Delete crypted files after decryption' option):Update 19 May, 2017 - Security researchers from Avast have developed a free decrypted for Crysis ransomware (.wallet and .DHARMA) versions. If you files are encrypted by this ransomware and your files have .wallet or .DHARMA extensions appended to them you can download this decrypter HERE.Virus-encoder ransomware removal:Instant automatic malware removal:Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:▼ DOWNLOAD Combo CleanerBy downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. To use full-featured product, you have to purchase a license for Combo

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Create a mutex with the name 7ce3e80173264ea19b05306b865eadf9.Graven crypted samples were primarily observed between November 2021 and February 2022, and payloads include BazarLoader, Emotet, and IcedID.Select samples using the Graven crypter:Sample FamilySHA256 HashBazarLoader4246dbf6daf37bac0e525bdd8122131bedf4e32f9542c4696fa525e1f71a6508Emotet836d8e2f36ad80f937a377f568d78653e975e4b52db995ae18272dfecca9ac0fIcedIDa61b1d70d469b8ca7acdbd26fc859e6aeb229c4636fe9c92eac856914f326ac8Scroll to view full table SkeletonSkeleton is a fairly basic crypter, which stores the payload as a XOR encrypted, MessageTable type resource within the loader binary, often with just a hardcoded ascii string used as the XOR key. Upon execution, the payload resource is loaded, decrypted, and executed in memory. Variants have been found loading either shellcode or PE formatted payloads. PE payloads are mapped into memory, imports loaded, and then executed from their entrypoint. Skeleton crypted binaries have been observed loading Trickbot, Cobalt Strike and IcedID payloads between December 2021 and late March 2022.Select samples using the Skeleton crypter:Sample FamilySHA256 HashTrickbot01c69d0acc8734993ba9cbfe9b0da4616bb05041e103afdb487759995b93ee5cIcedID617e0f57f4283ca044003326663b5614d66f97e16bccdd8bec1321fad44a7195Cobalt Strike3dea0bac5c9ae010b4abeb532a3a347cd55682512ffe287dbb310d5d434777efScroll to view full table RecommendationsEnsure anti-virus software and associated files are up to date.Search for existing signs of the indicated IoCs in your environment.Consider blocking and or setting up detection for all URL and IP based IoCs.Keep applications and operating systems running at the current released patch level.Do not install unapproved apps on a device that has access to the corporate network.Exercise caution with attachments and links in emails.X-ForceIf you have questions or want a deeper discussion on how IBM X-Force can help you with incident response, threat intelligence, or offensive security services schedule a follow up meeting here:IBM X-Force SchedulerIf you are experiencing cybersecurity issues or an incident, contact X-Force to help.US hotline 1-888-241-9812 Global hotline (+001) 312-212-8034 Malware Reverse Engineer, IBM Security Cyber Threat Hunt Analyst, IBM Security X-Force Threat Intelligence, IBM. Download Crypted-Email latest version for Windows free to try. Crypted-Email latest update: Ma

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The stub. Check again and release.Tasks:1. Crypting files for Leo on the build machine.2. Cobalt shellcode3. Lockers4. Cobalt exe and dll5. Trickbot dll6. Educate and give other team members access to the build machine so that they can collect the crypts themselves.7. Preparing links for loading and testing excels for netwalker, hash, cherry.Within the ContiLeaks, there are multiple references to the use of a Jenkins server for the Build Machine. In one such example, on January 17, 2022, two ITG23 developers “derekson” and “elon” discuss the Jenkins server. X-Force also uncovered Program Database (PDB) file paths used by ITG23 crypters that reference Jenkins (see below for more details).Derekson → Elon: Привет. Почти закончил со вторым сервером. Скажи когда можно подключить к дженкинсу для теста?(Hello. Almost finished with the second server. Tell me when can I connect to jenkins for a test?) Throughout the leaked chats, there are multiple examples of Bentley delivering crypted malware samples to affiliates and partners such as Cherry, Netwalker, and Zeus. X-Force assesses that “zevs” (“zeus”) is affiliated with the prominent distribution group Hive0106 (aka TA551), which used the gtags ‘zev,’ ‘zem’ and ‘zvs’ during their Trickbot campaigns. Hive0106 is a prominent distribution affiliate with an established relationship with ITG23. Throughout the chats, “zeus” is alternatively translated as “зевса”, “зевсом”, “зевсу”, and “зевс” depending on the grammatical case.For example, on Aug 10, 2021, Bentley sends the following request to Hof, a developer associated with Trickbot malware:Bentley → Hof: Доброе утро. Сделай, пожалуйста, zev4.dll и zem1.dll для Зевса(Good morning. Please make zev4.dll and zem1.dll for Zeus)The following messages also indicate crypted samples were prepared for Zevs:August 31, 2021:Bentley → Zevs: Еще ответ: у нас есть опыт серийной выдачи криптов п БК* уже, один заказчик берет партиями по 30-100 штук(Another answer: we have experience in the serial issuance of crypts and BK* already, one customer takes in batches of 30-100 pieces)September 24, 2021:Neo → Zevs: монт молчит, я крипты готовил 3 штуки к 8 по мск(Mont is silent, I prepared 3 crypts by 8 Moscow time)*We assess БК (BK) likely is a reference to BazarLoader based on analyzing