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Analysis Report PR0078966.xlsx
Overview
General Information
| Sample Name: | PR0078966.xlsx |
| Analysis ID: | 385365 |
| MD5: | f5921b095b5db6eaa0cccb1cc9874a5b |
| SHA1: | db7fec49af3b772abf7ffa409fa186860447f375 |
| SHA256: | 5f5ec4a144dce14821a36549141718418145e253974eaae902c8acc73a514839 |
| Tags: | VelvetSweatshopxlsx |
| Infos: | |
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Detection
Nanocore
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Detected Nanocore Rat
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Sigma detected: NanoCore
Sigma detected: Scheduled temp file as task from temp location
Yara detected AntiVM3
Yara detected Nanocore RAT
.NET source code contains potential unpacker
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Uses dynamic DNS services
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Allocates a big amount of memory (probably used for heap spraying)
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Antivirus or Machine Learning detection for unpacked file
Contains functionality to call native functions
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Document misses a certain OLE stream usually present in this Microsoft Office document type
Downloads executable code via HTTP
Drops PE files
Drops PE files to the user directory
Enables debug privileges
Found inlined nop instructions (likely shell or obfuscated code)
IP address seen in connection with other malware
Installs a raw input device (often for capturing keystrokes)
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Office Equation Editor has been started
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
Sample execution stops while process was sleeping (likely an evasion)
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
AV Detection: |
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| Antivirus detection for URL or domain |
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| Found malware configuration |
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| Multi AV Scanner detection for dropped file |
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| Multi AV Scanner detection for submitted file |
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| Yara detected Nanocore RAT |
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| Machine Learning detection for dropped file |
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| Antivirus or Machine Learning detection for unpacked file |
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Exploits: |
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| Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) |
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| Office Equation Editor has been started |
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Software Vulnerabilities: |
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| Allocates a big amount of memory (probably used for heap spraying) |
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| Found inlined nop instructions (likely shell or obfuscated code) |
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Code function: |
4_2_00514658 | |
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4_2_00514648 | |
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4_2_00514518 | |
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4_2_00514508 | |
| Potential document exploit detected (performs DNS queries) |
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| Potential document exploit detected (performs HTTP gets) |
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| Potential document exploit detected (unknown TCP traffic) |
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| C2 URLs / IPs found in malware configuration |
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| Uses dynamic DNS services |
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| Detected TCP or UDP traffic on non-standard ports |
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| Downloads executable code via HTTP |
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