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Windows Analysis Report y4oMrtO1Mt.exe
Overview
General Information
| Sample Name: | y4oMrtO1Mt.exe |
| Analysis ID: | 518780 |
| MD5: | db2ef30e8f821c8f00456941f5944849 |
| SHA1: | 01a08a69f1e8e6d822ece577a9ebe84a0c7f5f60 |
| SHA256: | 433cf9125a44e304eca2c5cf3bfe2af0b1deafd1c5e8d13d559e1bac9de711b3 |
| Tags: | exeRedLineStealer |
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Detection
RedLine SmokeLoader
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Yara detected RedLine Stealer
Yara detected SmokeLoader
System process connects to network (likely due to code injection or exploit)
Detected unpacking (changes PE section rights)
Antivirus detection for URL or domain
Antivirus detection for dropped file
DLL reload attack detected
Multi AV Scanner detection for submitted file
Benign windows process drops PE files
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Maps a DLL or memory area into another process
Sigma detected: Suspicious Script Execution From Temp Folder
Tries to detect sandboxes and other dynamic analysis tools (window names)
Query firmware table information (likely to detect VMs)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Machine Learning detection for sample
Injects a PE file into a foreign processes
.NET source code contains very large array initializations
Contains functionality to inject code into remote processes
Deletes itself after installation
Creates a thread in another existing process (thread injection)
Adds a directory exclusion to Windows Defender
Hides that the sample has been downloaded from the Internet (zone.identifier)
Found many strings related to Crypto-Wallets (likely being stolen)
Checks if the current machine is a virtual machine (disk enumeration)
PE file contains section with special chars
Hides threads from debuggers
.NET source code references suspicious native API functions
Checks for kernel code integrity (NtQuerySystemInformation(CodeIntegrityInformation))
Sigma detected: Powershell Defender Exclusion
.NET source code contains method to dynamically call methods (often used by packers)
PE file has nameless sections
Machine Learning detection for dropped file
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to dynamically determine API calls
HTTP GET or POST without a user agent
Downloads executable code via HTTP
Uses insecure TLS / SSL version for HTTPS connection
Contains long sleeps (>= 3 min)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Drops files with a non-matching file extension (content does not match file extension)
PE file contains strange resources
Drops PE files
Tries to load missing DLLs
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Binary contains a suspicious time stamp
Creates a process in suspended mode (likely to inject code)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Yara signature match
Contains functionality to check if a debugger is running (IsDebuggerPresent)
PE file contains sections with non-standard names
Found potential string decryption / allocating functions
Yara detected Credential Stealer
Contains functionality to call native functions
Contains functionality for execution timing, often used to detect debuggers
Entry point lies outside standard sections
Enables debug privileges
Creates a DirectInput object (often for capturing keystrokes)
Found inlined nop instructions (likely shell or obfuscated code)
PE file does not import any functions
PE file contains an invalid checksum
Extensive use of GetProcAddress (often used to hide API calls)
Detected TCP or UDP traffic on non-standard ports
Contains functionality to launch a program with higher privileges
Contains capabilities to detect virtual machines
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Classification
AV Detection: |
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| Antivirus detection for URL or domain |
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| Antivirus detection for dropped file |
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| Multi AV Scanner detection for submitted file |
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| Multi AV Scanner detection for domain / URL |
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| Multi AV Scanner detection for dropped file |
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| Machine Learning detection for sample |
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| Machine Learning detection for dropped file |
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Compliance: |
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| Uses insecure TLS / SSL version for HTTPS connection |
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| Uses 32bit PE files |
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Software Vulnerabilities: |
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| Found inlined nop instructions (likely shell or obfuscated code) |
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Code function: |
24_2_03020520 | |
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Code function: |
24_2_03020DD0 | |
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Code function: |
24_2_030291CC | |
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24_2_030291D8 | |
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24_2_03020DC0 | |
Networking: |
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| System process connects to network (likely due to code injection or exploit) |
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| HTTP GET or POST without a user agent |
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| Downloads executable code via HTTP |
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