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Windows
Analysis Report
Vk2yYa9dHl.exe
Overview
General Information
Sample name: | Vk2yYa9dHl.exerenamed because original name is a hash value |
Original sample name: | 2892DDE70ACC92AF8CAFE78EC3AE1FE8.exe |
Analysis ID: | 1430617 |
MD5: | 2892dde70acc92af8cafe78ec3ae1fe8 |
SHA1: | 782fe1302e787f14ef0c650cb5268e1d7e359d05 |
SHA256: | e0a007a54642991cf3cfc0f55c3c2b5b002c2f939135bfac2537f03f9c970ed2 |
Tags: | exeStealc |
Infos: | |
Detection
Mars Stealer, Stealc, Vidar
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Found malware configuration
Multi AV Scanner detection for submitted file
Snort IDS alert for network traffic
Yara detected Mars stealer
Yara detected Stealc
Yara detected Vidar stealer
C2 URLs / IPs found in malware configuration
Found evasive API chain (may stop execution after checking locale)
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for sample
PE file has a writeable .text section
Sample uses string decryption to hide its real strings
Searches for specific processes (likely to inject)
Self deletion via cmd or bat file
Tries to harvest and steal Bitcoin Wallet information
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Crypto Currency Wallets
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)
Creates a process in suspended mode (likely to inject code)
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 large amount of non-executed APIs
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 sections with non-standard names
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)
Sample file is different than original file name gathered from version info
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
- Vk2yYa9dHl.exe (PID: 7292 cmdline:
"C:\Users\ user\Deskt op\Vk2yYa9 dHl.exe" MD5: 2892DDE70ACC92AF8CAFE78EC3AE1FE8) - cmd.exe (PID: 7404 cmdline:
"C:\Window s\system32 \cmd.exe" /c timeout /t 5 & de l /f /q "C :\Users\us er\Desktop \Vk2yYa9dH l.exe" & d el "C:\Pro gramData\* .dll"" & e xit MD5: D0FCE3AFA6AA1D58CE9FA336CC2B675B) - conhost.exe (PID: 7412 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - timeout.exe (PID: 7456 cmdline:
timeout /t 5 MD5: 976566BEEFCCA4A159ECBDB2D4B1A3E3)
- 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 |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Vidar | Vidar is a forked malware based on Arkei. It seems this stealer is one of the first that is grabbing information on 2FA Software and Tor Browser. | No Attribution |
{"C2 url": "89.105.198.253/300e6d86f44da037.php"}
{"C2 url": "http://89.105.198.253/300e6d86f44da037.php"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_MarsStealer | Yara detected Mars stealer | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_MarsStealer | Yara detected Mars stealer | Joe Security | ||
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_MarsStealer | Yara detected Mars stealer | Joe Security | ||
JoeSecurity_CredentialStealer | Yara detected Credential Stealer | Joe Security | ||
Click to see the 6 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_MarsStealer | Yara detected Mars stealer | Joe Security | ||
JoeSecurity_Vidar_1 | Yara detected Vidar stealer | Joe Security | ||
JoeSecurity_MarsStealer | Yara detected Mars stealer | Joe Security |
⊘No Sigma rule has matched
Timestamp: | 04/24/24-00:31:54.032632 |
SID: | 2044246 |
Source Port: | 49730 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 04/24/24-00:31:53.376161 |
SID: | 2044243 |
Source Port: | 49730 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 04/24/24-00:31:54.342182 |
SID: | 2051831 |
Source Port: | 80 |
Destination Port: | 49730 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 04/24/24-00:31:53.721473 |
SID: | 2044244 |
Source Port: | 49730 |
Destination Port: | 80 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Timestamp: | 04/24/24-00:31:54.031344 |
SID: | 2051828 |
Source Port: | 80 |
Destination Port: | 49730 |
Protocol: | TCP |
Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
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Source: | Code function: | 0_2_00059540 | |
Source: | Code function: | 0_2_00056C10 | |
Source: | Code function: | 0_2_000594A0 | |
Source: | Code function: | 0_2_000655A0 | |
Source: | Code function: | 0_2_0005BF90 | |
Source: | Code function: | 0_2_6CCD6C80 |
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Source: | Code function: | 0_2_0005D1C0 | |
Source: | Code function: | 0_2_000515C0 | |
Source: | Code function: | 0_2_0005B610 | |
Source: | Code function: | 0_2_0005DB60 | |
Source: | Code function: | 0_2_0005D540 | |
Source: | Code function: | 0_2_00062570 | |
Source: | Code function: | 0_2_000621F0 | |
Source: | Code function: | 0_2_00061650 | |
Source: | Code function: | 0_2_00061B80 |
Source: | File opened: | Jump to behavior | ||
Source: | File opened: | Jump to behavior | ||
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Networking |
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