Windows
Analysis Report
vR19oQpY8c.exe
Overview
General Information
Sample name: | vR19oQpY8c.exerenamed because original name is a hash value |
Original sample name: | c1d361844740dd2caefe62dc78193a21.exe |
Analysis ID: | 1386371 |
MD5: | c1d361844740dd2caefe62dc78193a21 |
SHA1: | eb0eaca6314a0ced3c8dfe3594cad3fa00850fe7 |
SHA256: | 9563049118d61a4e55b54ee7fc0f4c0984063598ec030c3ff6bc080e5320a4f2 |
Tags: | exeStealc |
Infos: | |
Detection
Stealc
Score: | 88 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Yara detected Stealc
Machine Learning detection for sample
Tries to harvest and steal browser information (history, passwords, etc)
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to dynamically determine API calls
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to read the PEB
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Detected potential crypto function
Downloads executable code via HTTP
Drops PE files
Drops PE files to the application program directory (C:\ProgramData)
Extensive use of GetProcAddress (often used to hide API calls)
Found dropped PE file which has not been started or loaded
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
Internet Provider seen in connection with other malware
PE file contains an invalid checksum
PE file contains sections with non-standard names
PE file does not import any functions
PE file overlay found
Queries information about the installed CPU (vendor, model number etc)
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Tries to load missing DLLs
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Yara detected Credential Stealer
Classification
- System is w10x64
vR19oQpY8c.exe (PID: 6980 cmdline:
C:\Users\u ser\Deskto p\vR19oQpY 8c.exe MD5: C1D361844740DD2CAEFE62DC78193A21) conhost.exe (PID: 7000 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Stealc | Stealc is an information stealer advertised by its presumed developer Plymouth on Russian-speaking underground forums and sold as a Malware-as-a-Service since January 9, 2023. According to Plymouth's statement, stealc is a non-resident stealer with flexible data collection settings and its development is relied on other prominent stealers: Vidar, Raccoon, Mars and Redline.Stealc is written in C and uses WinAPI functions. It mainly targets date from web browsers, extensions and Desktop application of cryptocurrency wallets, and from other applications (messengers, email clients, etc.). The malware downloads 7 legitimate third-party DLLs to collect sensitive data from web browsers, including sqlite3.dll, nss3.dll, vcruntime140.dll, mozglue.dll, freebl3.dll, softokn3.dll and msvcp140.dll. It then exfiltrates the collected information file by file to its C2 server using HTTP POST requests. | No Attribution |
⊘No configs have been found
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Stealc_1 | Yara detected Stealc | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Stealc | Yara detected Stealc | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
JoeSecurity_Stealc | Yara detected Stealc | Joe Security |
⊘No Sigma rule has matched
Timestamp: | 192.168.2.491.206.178.11849729802044244 02/04/24-17:16:55.825153 |
SID: | 2044244 |
Source Port: | 49729 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 192.168.2.491.206.178.11849729802044246 02/04/24-17:16:56.088152 |
SID: | 2044246 |
Source Port: | 49729 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 192.168.2.491.206.178.11849729802044243 02/04/24-17:16:55.584186 |
SID: | 2044243 |
Source Port: | 49729 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Virustotal: | Perma Link |
Source: | ReversingLabs: | |||
Source: | Virustotal: | Perma Link |
Source: | Joe Sandbox ML: |
Source: | Code function: | 0_2_00FB92E0 | |
Source: | Code function: | 0_2_00FBA620 | |
Source: | Code function: | 0_2_00FBBB80 | |
Source: | Code function: | 0_2_00FD2520 | |
Source: | Code function: | 0_2_00FC13A0 | |
Source: | Code function: | 0_2_00FBBB20 |
Source: | Static PE information: |
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Source: | Code function: | 0_2_00FC0530 | |
Source: | Code function: | 0_2_00FC4A8C | |
Source: | Code function: | 0_2_00FC3A20 |
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior |
Networking |
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Source: | Snort IDS: | ||
Source: | Snort IDS: | ||
Source: | Snort IDS: |
Source: | HTTP traffic detected: |