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Analysis Report ul9kpUwYel.xls
Overview
General Information
Detection
Hidden Macro 4.0
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Sigma detected: Powershell downloading file from url shortener site
Contains functionality to steal Internet Explorer form passwords
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Found obfuscated Excel 4.0 Macro
Machine Learning detection for dropped file
Obfuscated command line found
Powershell drops PE file
Sigma detected: Microsoft Office Product Spawning Windows Shell
Suspicious powershell command line found
Tries to download and execute files (via powershell)
Tries to harvest and steal browser information (history, passwords, etc)
Yara detected Obfuscated Powershell
Adds / modifies Windows certificates
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to dynamically determine API calls
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 to record screenshots
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Document contains embedded VBA macros
Downloads executable code via HTTP
Drops PE files
Drops certificate files (DER)
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Found potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains more sections than normal
PE file contains sections with non-standard names
PE file contains strange resources
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Queries the volume information (name, serial number etc) of a device
Searches for user specific document files
Uses Microsoft's Enhanced Cryptographic Provider
Uses code obfuscation techniques (call, push, ret)
Uses insecure TLS / SSL version for HTTPS connection
Yara signature match
Classification
Startup |
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Malware Configuration |
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No configs have been found |
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Yara Overview |
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Initial Sample |
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Source | Rule | Description | Author | Strings |
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SUSP_Excel4Macro_AutoOpen | Detects Excel4 macro use with auto open / close | John Lambert @JohnLaTwC |
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PCAP (Network Traffic) |
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Source | Rule | Description | Author | Strings |
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SUSP_PowerShell_Caret_Obfuscation_2 | Detects powershell keyword obfuscated with carets | Florian Roth |
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JoeSecurity_ObfuscatedPowershell | Yara detected Obfuscated Powershell | Joe Security |
Dropped Files |
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Source | Rule | Description | Author | Strings |
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SUSP_PowerShell_Caret_Obfuscation_2 | Detects powershell keyword obfuscated with carets | Florian Roth |
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JoeSecurity_ObfuscatedPowershell | Yara detected Obfuscated Powershell | Joe Security |
Memory Dumps |
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Source | Rule | Description | Author | Strings |
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SUSP_PowerShell_Caret_Obfuscation_2 | Detects powershell keyword obfuscated with carets | Florian Roth |
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Sigma Overview |
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System Summary: |
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Sigma detected: Powershell downloading file from url shortener site | Show sources |
Source: | Author: Joe Security: |
Sigma detected: Microsoft Office Product Spawning Windows Shell | Show sources |
Source: | Author: Michael Haag, Florian Roth, Markus Neis: |
Sigma detected: Hiding Files with Attrib.exe | Show sources |
Source: | Author: Sami Ruohonen: |
Signature Overview |
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AV Detection: |
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Antivirus detection for URL or domain | Show sources |
Source: | Avira URL Cloud: |
Multi AV Scanner detection for domain / URL | Show sources |
Source: | Virustotal: | Perma Link |
Multi AV Scanner detection for dropped file | Show sources |
Source: | ReversingLabs: |
Multi AV Scanner detection for submitted file | Show sources |
Source: | Virustotal: | Perma Link | ||
Source: | Metadefender: | Perma Link | ||
Source: | ReversingLabs: |
Machine Learning detection for dropped file | Show sources |
Source: | Joe Sandbox ML: |
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Software Vulnerabilities: |
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Document exploit detected (process start blacklist hit) | Show sources |
Source: | Process created: |
Source: | DNS query: |
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