Malware, a portmanteau for malicious software, is software used or created by attackers to disrupt computer operation, gather sensitive information, or gain access to computer systems.

learn more… | top users | synonyms

0
votes
1answer
47 views

Unknown algorithm in forloop

i am reversing a malware sample .but getting stucked in a loop below.the line written in the bold letter generated random letter like "/2","/lm32" etc to EDX.The thing is that ECX does not contains ...
8
votes
1answer
328 views

Randomly picking up a x86 register for an instruction

I came around a piece of malware which i am analyzing and have found that it uses some kind of math to randomly selecting a register for a specific instruction Which i don't understand how this ...
1
vote
0answers
41 views

Linux/Ebury Samples [on hold]

I am looking for a sample of Linux/Ebury to reverse engineer and I cannot seem to find one anywhere. Does anyone know where I should look? This is what I am looking for http://www.welivesecurity.com/...
3
votes
2answers
66 views

Crash after exe modification [closed]

I am testing a malware that built as COM EXE service. This exe file had a digital signature. I succeeded to remove the digital signature for trying to modify it for reverse engineering tests. But ...
1
vote
0answers
83 views

Does anybody knows a good dataset for malware families? [duplicate]

Does anybody knows a good dataset for malware families? What i need is a dataset where malware are already classified in families. And is not duplicate of "Where can I, as an individual, get malware ...
-1
votes
1answer
43 views

how can one cause heap memory buffer overflow in a worker process by using a specially crafted request? [closed]

i am to web applications so i have recently published my website and ran a penetration test using Acunetix Vulnerability scanner so i have found the following result and for me to experience a lot ...
0
votes
1answer
57 views

where i can get android malware samples to analyze? [duplicate]

Is there any sites to get new android malware files(.apk files) for analysing purpose? and also suggest me some blogs/sites for android malware analysis? Please reply me ASAP. Thanks in advance.
0
votes
1answer
141 views

Dump a child process created by malware with an ALTERNATIVE process hollowing process

I'm reversing a malware which uses a variant of Process Hollowing to create a process which I can't dump. I don't know what I'm doing wrong. I always see the suggestion to stop at GetContextThread , ...
1
vote
0answers
87 views

Collecting malware samples [duplicate]

Could you please list some sites from where I could download viruses/worms/trojans in .exe format. I have read the answers to the other similar questions but couldn't make much use of them. I am a ...
1
vote
1answer
27 views

How to get Waledac and Storm P2P botnets [duplicate]

I am going to conduct a research on p2p botnet detection based on their network behavior. Would you help me how to get these botnets sample. Thanx!
1
vote
0answers
44 views

Get DLL from EXE file [duplicate]

I am trying to reverse engineer an DLL that is loaded from a EXE. I don't have the DLL file. I just have an executable file that injects the DLL into a certain process. When I try using ollydbg or ...
3
votes
1answer
161 views

How do malware steal Code signing certificates?

While analyzing/studying/RE exe's/dll's you see the certificates in peview/hexeditor etc. but how does one come to know that the certificate is a fake/malicious/expired one, there has to be a ...
-1
votes
1answer
97 views

Extracting Opcodes of a binary

I want to extract opcodes 'Assembly instructions' from malware binaries . and because I have large number of samples I don't want to do it invidiously .. instead I want to automate the process of ...
1
vote
0answers
84 views

SysTracer by SysReveal.com clean?

SysTracer from SysReveal.com (not from www.blueproject.ro) seems to be a very nice tool for live monitoring your system and check what executable files do at your system. I saw some videos on YouTube ...
1
vote
2answers
101 views

Dynamic analysis of malware samples

I have thousands of Linux malware samples in ELF format. And I am thinking to use dynamic analysis (say, PIN) to obtain an execution trace of each malware sample. However, I am afraid such activity ...
1
vote
1answer
125 views

How to get Arg in Ollydbg

I am In A deep Trouble. I am New to Reverse Engineering. I am Currently Using OLLYDBG. Now, I was Trying to Crack the Password of a .exe file using Ollydbg Now, The EXE file which i was trying to ...
0
votes
1answer
421 views

RANSOMWARE SCRIPT decryption

I have a friend with PC which is infected with some sort of "RANSOMWARE" - a type of malware where will encrypt your files(images,videos and documents) and ask for payment for decryption. I managed ...
1
vote
3answers
136 views

What is the average time for “defusing” malware self-protection mechanisms?

I always wondered how much time is needed to get rid of all that anti-VM/crypto/protector/anti-debug stuff (without analyzing actual payload and purpose), especially if you're dealing with malware on ...
5
votes
2answers
215 views

Reverse Engineering Chinese laser engraver

I would like to reverse-engineer the software that came with my Chinese-made laser engraver. Unfortunately the hardware does not play at all with other software out there... The original software is ...
-2
votes
1answer
92 views

How rootkits hide services on kernel mode? [closed]

How rootkits hide services on kernel mode? thanks
0
votes
1answer
45 views

Why is there no MFCxx.dll in the import table?

I have an exe which I'm confident uses MFC(I have seen the code and it heavily uses MFC) but when I see the Import Table why don't I see MFCxx.dll entry...
0
votes
1answer
110 views

open source static or dynamic malware unpacker

I am looking for static and dynamic unpacker tools. I only found PE-Explorer the only can handle UPX packer. So I am carious to know is there any open source static or dynamic unpacker?
0
votes
1answer
108 views

Hidden code in dissasembly

I'm testing malware that built from single EXE file and it doesn't load any other DLLs. I can see that EXE is register as COM object (I don't know how EXE can be COM object...). But when I run it and ...
1
vote
0answers
32 views

Where can I get a dataset of URLs of websites that diffuse malware? [duplicate]

In order to study some malware detection algorithms I am developping in my PhD, I would like to know where I could download a list of malware websites. Thank you
1
vote
1answer
137 views

Documentation of malware reverse engineering

I'm interesting in reversing malware. The problem is, that if you analyse malware on your own you don't know how efficient you are, and with which techniques/tools/methods you can use for better ...
1
vote
0answers
121 views

Malware analysis - AntiDebugging - Malware slows down the PC while being debugged

As part of my work, I'm debugging a malware found and his behavior is pretty basic after execution: Being executed Decrypt a lot of data from memory and obtain a new PE (from memory) Create a child ...
2
votes
2answers
554 views

Reversing a Windows service

I am trying to reverse engineer a malware that open a windows service dynamically in OllyDbg. When the malware calls StartServiceCtrDispatcherW, I receive an error: How I can continue to analyze ...
1
vote
1answer
138 views

Why hook a function rather than set a breakpoint

I know hooking is usually used as a technique when one would rather use external (or injected) code to manipulate an executable, vs breakpoints which are usually set by a debugging framework in an ...
0
votes
2answers
179 views

Is it dangerous to disassemble malware in IDA?

If I were to disassemble a malware sample in IDA without being in a VM, is there any way I can infect my machine?
1
vote
3answers
150 views

What is the average time for malware analysis?

I was wondering what is the average time for you to classify (by reverse engineering) if a suspicious file is a malware or not? Thanks
0
votes
1answer
123 views

Reverse engineer malware embedded in Microsoft rtf

I am currently trying to analyse a particular document that was flagged as malware in our honey pot. In virus total is shows up as being a Trojan and I have reason to believe it might be connected to ...
0
votes
0answers
41 views

Detecting Script Language

I have a program with embed interpreter and I want to know if it interprets a known language. The program have some encrypted/compressed strings that decrypt/extract them in memory and the ...
3
votes
1answer
258 views

Unable to dump a process

I'm trying to reverse a malware sample with the following MD5: ef668a0cd0755c67930ece13d28a6bda. Obvious, this is a packed malware. On a first look, it seems to bee some GUI Programm, but at some ...
-1
votes
1answer
123 views

What certifications do I need to become a Malware Analyst? [closed]

I've previously posted here on how to get started as a malware analyst, and wanted to say thanks on getting me started. How much do certifications help me in for my resume and which one(s) should I ...
0
votes
1answer
142 views

How do I make a YARA signature that does NOT look in the resource section?

I'm trying to use YARA to sort out a variety of files into families. Some malware drops other malware from images within their resource images. What I'd like to do is write a signature that ignores ...
1
vote
2answers
561 views

Where can I get Linux malware samples?

There have been numerous sites stated in this wonderful post that one could retrieve malware samples. However, I am having a difficult time (sorry D:) locating Linux-specific malware from those sites ...
0
votes
2answers
247 views

Why can I access FS:[0] in OllyDbg but not offsets to CS,DS,SS?

I can access the FS:[0h] which points to the SEH chain but cannot do the same for other segment registers.What is the reason for it ? Also,I was debugging an exe which has PTRD at 0x600 and AEP at ...
1
vote
0answers
80 views

unpack a malware manually [duplicate]

I`m working on this malware to analyze: http://www.freeuploadsite.com/do.php?id=74209 password: infected It seems it is packed but when I use "PE View" , etc tools to find the packer, their results ...
5
votes
2answers
865 views

Need advice : Reverse engineering a pdf with shellcode

Problem : I try to find the plaintext which was hidden at pdf inbuilt with shellcode What i tried : I received a pdf which contains javascript with it ,i dig the pdf as follows : Exploring ...
1
vote
2answers
265 views

Debugging Win32.Upatre - why does Ollydbg fail to analyze this?

So I've been looking at this thread - Where can I, as an individual, get malware samples to analyze? And grabbed myself a binary sample of Win32.Upatre from Halvar Flake's blog. I started analyzing ...
2
votes
2answers
140 views

How can I extend a memory of an analysed executable in IDA Pro?

I'm analysing some malware executable with ImmDBG and IDA Pro. The executable calls the kernel32.VirtualAlloc() at runtime with an argument lpAddress=NULL what means that an operating system decides ...
1
vote
0answers
82 views

How do I become a Malware Analyst? [duplicate]

Sorry if this is posted in the wrong section. A little about me: I'm going to be a sophomore in the fall at university, my major is Computer Science (Information Assurance). I've been interested in ...
2
votes
2answers
424 views

Generating call graph for assembly instructions

I'm writing a tool and I need to generate the callgraph for assembly instructions. But I do not know how to exactly generate call graph from assembly instruction. Do you have any idea? To clarify, I ...
2
votes
1answer
177 views

Why does an exe's import Table have two refrences to kernel32.dll (or any other dll)?

According to what I know, Import Descriptor table is made of an array of _IMAGE_IMPORT_DESCRIPTOR structures. There is one _IMAGE_IMPORT_DESCRIPTOR for every dll that is imported. I have an exe which ...
2
votes
3answers
410 views

Best and smarter way to improve unpacking skills

I want to find a way to improve my unpacking skills, i am not a noob but i miss steps from simple to hard packers. I saw lot of video tutorials, the most of the time i see "click F9 x times to reach ...
1
vote
2answers
2k views

When to use Windbg and Ollydbg?

According to what I know :WinDbg uses debugging information (pdb/symbol files) for debugging.So ,for example say I get a unknown exe (malicious) can I debug it since I'll not be having its .pdb. Is ...
1
vote
0answers
97 views

Analysis target modifies debugging registers during initial file open in ollydbg

While opening a binary in Ollydbg, I get a warning that the debugged program has modified the debugging registers. The following entry is in the log: Address: 7749218E Modified debug registers of main ...
2
votes
4answers
926 views

Unpacking and dumping using ollydump

I am trying to learn how to unpack a malware. I am trying this with ollydbg. However, when I try to dump the unpacked using ollydump plugin. It prompts the error "Bad DOS signature!!". Could someone ...
3
votes
2answers
317 views

Will this code run in real machine or is it some kind of Anti Reversing code?

I am reversing a file which is not running properly in Vmware.The code from the AEP is as shown below : POP EDI ; value of edi is 0x7C816D4F kernel32.7C816D4F PUSH EAX ;value of eax is 0 INC ...
2
votes
1answer
314 views

Studying Zeus 2.X

I'm doing some study on Zeus 2.x, trying to wrap my head around how it works. By using this code. I've built my own builder to work on my test environment. Right know I want to do a very specific ...