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Jumaat, 22 Mei 2020

KPOT Info Stealer Samples


KPOT Stealer is a "stealer" malware that focuses on stealing account information and other data from various software applications and services

References

1.  2020-04-19 Didier Stevens posted analysis of KPOT infostealer on the Infosec Handlers Diary blog "KPOT Analysis: Obtaining the Decrypted KPOT EXE"
These are samples to follow his analysis routine.

2. 2019-05-09 Proofpoint. New KPOT v2.0 stealer brings zero persistence and in-memory features to silently steal credentials


Download

             Other malware




Download. Email me if you need the password (see in my profile)




Hashes

1. From Didier Stevens' post

MD5  56ad7b243511ee7398d43df7643dc904
SHA-1  ae5ab7798ca267b1265a0496c562f219821d17cf
SHA-256  3fd4aa339bdfee23684ff495d884aa842165e61af85fd09411abfd64b9780146

2. From Proofpoint

MD5 7d7667ddce8fd69a0fd50bb08c287d10
SHA-1 087fc3e9a082983ee6a2b25f0ccb09eb723e0f39

SHA-256 67f8302a2fd28d15f62d6d20d748bfe350334e5353cbdef112bd1f8231b5599d

MD5 45ddc687f88b45fc3fec79f9dc8b38e2
SHA-1 de37b748e0e32d96c31f469f9ba4ea4f11e3e78b
SHA-256 36dcd40aee6a42b8733ec3390501502824f570a23640c2c78a788805164f77cecontagio.deependresearch.org/crime/kpotstealer(proofpoint)_win_samp.zip

More info


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Dicatat oleh Pak We Lang di 5:03:00 PG

BurpSuite Introduction & Installation



What is BurpSuite?
Burp Suite is a Java based Web Penetration Testing framework. It has become an industry standard suite of tools used by information security professionals. Burp Suite helps you identify vulnerabilities and verify attack vectors that are affecting web applications. Because of its popularity and breadth as well as depth of features, we have created this useful page as a collection of Burp Suite knowledge and information.

In its simplest form, Burp Suite can be classified as an Interception Proxy. While browsing their target application, a penetration tester can configure their internet browser to route traffic through the Burp Suite proxy server. Burp Suite then acts as a (sort of) Man In The Middle by capturing and analyzing each request to and from the target web application so that they can be analyzed.











Everyone has their favorite security tools, but when it comes to mobile and web applications I've always found myself looking BurpSuite . It always seems to have everything I need and for folks just getting started with web application testing it can be a challenge putting all of the pieces together. I'm just going to go through the installation to paint a good picture of how to get it up quickly.

BurpSuite is freely available with everything you need to get started and when you're ready to cut the leash, the professional version has some handy tools that can make the whole process a little bit easier. I'll also go through how to install FoxyProxy which makes it much easier to change your proxy setup, but we'll get into that a little later.

Requirements and assumptions:

Mozilla Firefox 3.1 or Later Knowledge of Firefox Add-ons and installation The Java Runtime Environment installed

Download BurpSuite from http://portswigger.net/burp/download.htmland make a note of where you save it.

on for Firefox from   https://addons.mozilla.org/en-US/firefox/addon/foxyproxy-standard/


If this is your first time running the JAR file, it may take a minute or two to load, so be patient and wait.


Video for setup and installation.




You need to install compatible version of java , So that you can run BurpSuite.
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Dicatat oleh Pak We Lang di 12:59:00 PG

Khamis, 21 Mei 2020

C++ Std::String Buffer Overflow And Integer Overflow

Interators are usually implemented using signed integers like the typical "for (int i=0; ..." and in fact is the type used indexing "cstr[i]", most of methods use the signed int, int by default is signed.
Nevertheless, the "std::string::operator[]" index is size_t which is unsigned, and so does size(), and same happens with vectors.
Besides the operator[] lack of negative index control, I will explain this later.

Do the compilers doesn't warn about this?


If his code got a large input it would index a negative numer, let see g++ and clang++ warnings:



No warnings so many bugs out there...

In order to reproduce the crash we can load a big string or vector from file, for example:


I've implemented a loading function, getting the file size with tellg() and malloc to allocate the buffer, then in this case used as a string.
Let see how the compiler write asm code based on this c++ code.



So the string constructor, getting size and adding -2 is clear. Then come the operator<< to concat the strings.
Then we see the operator[] when it will crash with the negative index.
In assembly is more clear, it will call operator[] to get the value, and there will hapen the magic dereference happens. The operator[] will end up returning an invalid address that will crash at [RAX]



In gdb the operator[] is a  allq  0x555555555180 <_znst7__cxx1112basic_stringicst11char_traitsicesaiceeixem plt="">

(gdb) i r rsi
rsi            0xfffffffffffefffe  -65538


The implmementation of operator ins in those functions below:

(gdb) bt
#0  0x00007ffff7feebf3 in strcmp () from /lib64/ld-linux-x86-64.so.2
#1  0x00007ffff7fdc9a5 in check_match () from /lib64/ld-linux-x86-64.so.2
#2  0x00007ffff7fdce7b in do_lookup_x () from /lib64/ld-linux-x86-64.so.2
#3  0x00007ffff7fdd739 in _dl_lookup_symbol_x () from /lib64/ld-linux-x86-64.so.2
#4  0x00007ffff7fe1eb7 in _dl_fixup () from /lib64/ld-linux-x86-64.so.2
#5  0x00007ffff7fe88ee in _dl_runtime_resolve_xsavec () from /lib64/ld-linux-x86-64.so.2
#6  0x00005555555554b3 in main (argc=2, argv=0x7fffffffe118) at main.cpp:29

Then crashes on the MOVZX EAX, byte ptr [RAX]

Program received signal SIGSEGV, Segmentation fault.
0x00005555555554b3 in main (argc=2, argv=0x7fffffffe118) at main.cpp:29
29     cout << "penultimate byte is " << hex << s[i] << endl;
(gdb)


What about negative indexing in std::string::operator[] ?
It's exploitable!

In a C char array is known that having control of the index, we can address memory.
Let's see what happens with C++ strings:






The operator[] function call returns the address of string plus 10, and yes, we can do abitrary writes.



Note that gdb displays by default with at&t asm format wich the operands are in oposite order:


And having a string that is in the stack, controlling the index we can perform a write on the stack.



To make sure we are writing outside the string, I'm gonna do 3 writes:


 See below the command "i r rax" to view the address where the write will be performed.


The beginning of the std::string object is 0x7fffffffde50.
Write -10 writes before the string 0x7fffffffde46.
And write -100 segfaults because is writting in non paged address.



So, C++ std::string probably is not vulnerable to buffer overflow based in concatenation, but the std::string::operator[] lack of negative indexing control and this could create vulnerable and exploitable situations, some times caused by a signed used of the unsigned std::string.size()










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Dicatat oleh Pak We Lang di 9:43:00 PTG

HOW TO BECOME A CERTIFIED ETHICAL HACKER

7 Tips to become a hacker?
It is very important for a hacker to learn different types of programming language such as C,C++,Python,Java,PHP etc and it is also necessary to learn hardware and networking for a good hacker because these skill are very useful to become a successful hacker.

1-Programming Language are essential to becoming a good hacker 

2-Networking skills is important to becoming an effective hacker.

3-SQL language are essential to becoming an effective hacker 

4-Internet surfing is also essential for becoming a hacker for gathering information.

5-Cryptography is essential to becoming a certified hacker from which a hacker can share his/her readable data to other person in a nonreadable form with the help of Cryptography.

6-Penetration testing  is also important for a hacker.

7-experiment a lot is also very useful to becoming a ethical hacker.

Follow me on insta_anoymous_adi
More information

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Dicatat oleh Pak We Lang di 8:55:00 PG

Masad Clipper And Stealer - Windows Spyware Exfiltrating Data Via Telegram (Samples)



Reference




"Masad Clipper and Stealer" steals browser information, computer files,  and automatically replaces cryptocurrency wallets from the clipboard with its own.
It is written using Autoit scripts and then compiled into a Windows executable.
It uses Telegram to exfiltrate stolen information.





Download

             Other malware






Hashes

SHA256SHA1MD5
1acf5a461ee16336eb8bbf8d29982c7e26d5e11827c58ca01adac671a28b52ad6001b34c17c122d201613fffd846b056614b66dae03234c2259c474aeb69500423ddeed7
290a1b89517dec10bfd9938a0e86ae8c53b0c78ed7c60dc99e4f8e5837f4f24a32800c10588053813f55bf8c87771311c5f7f38e2df4c1cf093c8373a8f2f194e77b69a2
7937a1068f130a90b44781eea3351ba8a2776d0fede9699ba8b32f3198de045ba2a67b06344e4f1cf85086f6b584316ec53d5e548368f1c4d8f0d908f5f4ff671df5f1da
87e44bca3cc360c64cc7449ec1dc26b7d1708441d471bf3d36cd330db35762942fe5483e6b82220eeeef12e531eb3347fea16ac11082ce517dd23eee335bedfc6bcd8205
cf97d52551a96dacb089ac41463d21cab2b004ba8c38ffc6cb5fb0958ddd34db5b79a15cb61f5260f0b9d807faa160e6d49590e4b5fdf9653eb1ffbdae8cb4f1f2d71747
79aa23c5a25c7cdbaba9c6c655c918dac3d9823ac62ebed9d7d3e94e1eaafc074a279a6b82fe801d3c8be9d16df2ef5623b177040029ab0fd56cd7e493b46a331ef18bd3
03d703f6d341be258ac3d95961ff0a67d4bf792f9e896530e193b091dca29c2ea9740352af2c9cc926deba7dffc452f213f7f05fa462aac76def5b53351b3b1ddb41124c
a368b6755e62e5c0ff79ea1e3bd146ee8a349af309b4acf0558a9c667e78293ae16167ab646381c277c2ca84319ceb57bacb2c92c4cdc7665adb1cda5897d4df4a560f88
ba933cefbe9a8034f0ba34e7d18481a7db7451c8ef4b6172fb0cad6db0513a5100749407e97085af470c75ef004f2235d30af44fc26a3f2317507a09d91014469b045384
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d5ce4b04b7eec6530a4a9d40510177468fadc235253e5a74530a8c9d990f3c5027fc204ffa42262b7570b6fccb435d4d38a3610fc5d8b73da810646407c333fe52186281
965a5949d8f94e17ebcd4cb6d0a7c19f49facbfc1b1c74111e5ceb83550d6c8f7698584b2e7c62061447a6a2583ed6957180c205e7ebe4411664672359b393f530fc2fc1
44134b9d4b10d94f6381b446a1728b116d62e65c1a52db45235af12caf7e38c0fd114077927d501606575ba9ab38ecfb3407d432a4388980d7e3539d74a950dab23d00ac
848d76a227f4fe282b7ddfd82a6dfc4c25da2735a684462b42fe4e1c413d8e34135cee7610890497183eb6251efef307ea013fe17bb23077b4f80df48b91b425eda05828
5ca0a957fe6c253827f344da4ba8692d77a4e21a1df4251594be2d27d87dd8aed231874332ca462fb462e4f68450d2c2c22d4bcddda77b3f3f74a2bdffd167917686e139
016fa511f6546ed439d2606c6db8821685a99f5a14ef3f710668b58dc89c69265c83749c62ee0131710bf26931cb1e463a8fbda3b0c34df85677d8f752dc1e1a5eeba0c9
22be594fbfa878f631c0632f6c4d260b00918817ff66a1f9f15efe44c1a58460856d635fca52631305f1fefc58eafa74496524b660ebf41953d5c6e212fc306cdb0c6519
f3571ec66288405dab43332ca03812617f85fb08832fbbe1f1d89901fe034b8a819485e20d841195e2e8a7ae5b41ff709887bb216984d37863c08b9fdd969297d35d3538
04c949eca23103b1de05278b49f42c3ab6b06f4bf20aafa5f2faefaa84c16ecd0487db2df1802dd4ee4ae3b62b5f08937dd5c77c4366ee61cbd7e636aea8540836a60036
d6fc04acda8f33a6d35eb577c27754c2f2b4d6f4869576c7c4e11b2c5e9b017683ae89826114662dad8553d5eeed5217b57047f22bc964e294d7ab314c34e5934d91a5a9
18c0bd4dd98008383fc52045ad896449fa7f0037593bb730ed1ef88aa547006dbcaa05b60a9d625852ac4f2d0d805ab16498815535d9f08c39c4cf396427f3a345e5c09a
4c9d5469e9095813418260045c2b11e499e4eaa0ffb25293f90f580c464157df4c6aacc0b893ed366f9f307326e59efa61e5153450dddaf7e5bb24aabf66eecd0c8b79cf
0b5f1fbc05dc8baca492b748adeb01fb4904e02723b59211ecde222f7b12d91e87f898e0d41c0f2c22d4e9278a942326877fc368da780b72140535d4c2d391e76dc8181d
31ad5c4547ceae4d0550c8460524c16a6105afc056760e872c4966656256c9dc37f485d3fa8f6cf13061cb1ea38ae0d5d2edfd95134aefcf640c24a1ab5344a96150fb05
edb00a0e5ff70e899857549e3263c887a799416c8bbab43ab130ca1be9bbd78c42c30dc551a3cb3bc935c0eae79b79f17942e439c2722241f765d2ad4fb58edd76a4adea
96f852b81760a425befaa11ea37c0cdea2622630bf2a0c94bb95042211ab614d5d9782064bc38d40c88f32c0410479cbd61caa40f332cfcda8c0ef579ede59eff23caa1e
57fd171a5b1a88e9583b42439851a91a940eb31105ab29cb314846da2ed43b820bfec2059823b936d782bea7bc16abd9923dddb56fff82df7a565b4570d299486697310f
277018b2cc6226dca6c7678cac6718c8584f7231340ad8cd7c03477559fdf48b261f916ce97ffc6817a4772705df68e6ccca8181009dc7d8766a85d85bb6a26ee69b66fe
e968affb1fc7756deb0e29807a06681d09a0425990be76b31816795875469e3dcf78484a999183324da9affdf2aaeff508d1dc473e1b8f6313447b8a4b49671ddeb8a4ee
4b1ccf6b823ee82e400ba25b1f532cd369d7e536475a470e2011b77ffeaf7bb3bc988f7cd32d411f2a9888afc72c7a892e2a1def55128a3da6f70129acdbf9dbe955cfe7
fc84d6636a34ad1a11dbaa1daec179e426bdcd9887b3d26dc06b202417c08f951df31bec02e35c9a4656bb3a3bdf631bb37605a855d77ab16377a8a314982f723fcc6fae
9ca15f15fbae58cb97b0d48a0248461e78e34e6d530338e3e5b91f209a1662678505dfaad6d10b84c73544eb748d547cb5bad9bdebc12c530dab0a65c37ffd72612fa705
31f3a402c1662ed6adffbf2b1b65cf902d1df763698eb76d21e4e94b4c62971418c972722d984ff6da2bc26a0aca4c7f209cc39c05bbf6e72b5b24c0c81e0671bf17b1e7
8d9f124ddd69c257189f1e814bb9e3731c00926fc2371e6ebe2654f3950ca02e553cd98c83e945ee3013aa40897baec0305b34a2b4030025e039c54c2d3923057447494c
a0923d7645604faaa864a079adeb741a5d6e65507a2819b2fee4835d396077d9f8e6995e28c789d8b24e982ac53d5d6ba453de73b796f85c8a7de71407d6e3c4206edda3
a19b790ea12f785256510dde367d3313b5267536a58ca0c27dbdac7c693f57e1a92f7393daf7ead9a44b12e35f850705798fc879a6defec886d31f6375712466dd794a96
f030fb4e859ee6a97c50c973a73dced3640befe37f579cfd15367ce6a9bbede2ad3a1e779f02539ccd07bff735e0823add9730b2c259564a8fe72333604a5686e30f6242
f01db6d77ac21211992ceae4e66e1e03c1cb39d61e03645b9369f28252ca769314c6bf63ff4d32d8a0a42e81ea39304fb7ab13c880fe593ef5538fbf66b3b3e1cb7b9b8b
dfe3d0e95feaed685a784aed14d087b019ba2eb0274947a840d2bdbae4ae36742107d057478328df8f538102508de00b0c4b37c7b5a85a0e7a2c4197c3794c8bb2eb5763
bf6083040ca51e83415f27c9412d9e3d700bd0841493b207bc96abf944ab0ca709a695ce6c35c029dd7577e29f403d7144698b417a2edceb31a9c0d05e5f13c6caee0576
b154151dc8ace5c57f109e6bb211a019db20c4f0127c4d13c7703f730bf492768c0cda049c85493df4e97db3db4ddc94075ba62cb6a895ac5ba5b6472680d47410a238a5
6bf6b1bde63cee9b81902efd187fdd56ecee5853754ce0a19d5ab5c3b02429886e2d4f0bcc97ce130ae89647f648d3e96548a391a29f9d176b913e7f693355700aaadbb9
0dcf547bd8f4074af97416d8b84ea64b2f3319064aa4bce64ad0c2e2d3957175a996b925e9391a69140caf6e4adba928694ffe66dd575413a40839f2807593aa21c71152
6cff1249cc45b61ce8d28d87f8edc6616447e38168e610bed142f0b9c46ea6849baa823deb9075e8df77b891115c019244de09de488bb5c0739485721182c01a82b01d14
5b5ebe019806885bbaafe37bc10ca09549e41c240b793fd29a70690a5d80b4963d46711f9064b96ff2d0affdef1ecd82d120659db95e2d8a8509ac05f5445d18d32cc7cb
103d87098c9702cab7454b52869aeeb6a22919f29a7f19be7509255ce2d8c83ee29a163488438c9ea9014ddf1a9b2d382cc5d7e6baf2587fafaedbab4a78b9b7fd8b55f8
c73675005a09008bc91d6bc3b5ad59a630ab4670dca6ac0d926165a3ecfd8d92d8ea2280cd06a5cc32b7d668e2b4b2e68f3a7e2a98ecc6fbb2cb5649daf751fcbfb81bcb
ef623aadd50330342dc464a31b843b3d8b5767d62a62f5e515ac2b380b208fbe620ff5a7aaf7f3fcf4abc9365e0e77b3ec4b434db14535c5835c9dfb3cbbc7f6fef6034c

Related links


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Dicatat oleh Pak We Lang di 8:07:00 PG
Langgan: Catatan (Atom)

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