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Analysis Report c8080fbf_by_Libranalysis
Overview
General Information
| Sample Name: | c8080fbf_by_Libranalysis (renamed file extension from none to rtf) |
| Analysis ID: | 403424 |
| MD5: | c8080fbfc825b01f11973566f1a3e589 |
| SHA1: | 9aa04e64414bef6504b211615f7fcdbe84cd75df |
| SHA256: | af801e43101c06e3366d942715a8b10f90f12ec3437cab1b8a0cc3872101eebe |
| Infos: | |
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Most interesting Screenshot:  |
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Detection
FormBook
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus detection for URL or domain
Detected unpacking (changes PE section rights)
Found malware configuration
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
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
System process connects to network (likely due to code injection or exploit)
Yara detected FormBook
C2 URLs / IPs found in malware configuration
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect virtualization through RDTSC time measurements
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Antivirus or Machine Learning detection for unpacked file
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality for read data from the clipboard
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Contains functionality to shutdown / reboot the system
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Downloads executable code via HTTP
Dropped file seen in connection with other malware
Drops PE files
Enables debug privileges
Found inlined nop instructions (likely shell or obfuscated code)
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
May sleep (evasive loops) to hinder dynamic analysis
Office Equation Editor has been started
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
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 domain / URL |
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Virustotal: |
Perma Link | ||
| Multi AV Scanner detection for dropped file |
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ReversingLabs: |
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| Multi AV Scanner detection for submitted file |
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| Yara detected FormBook |
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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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Jump to behavior | ||
| Office Equation Editor has been started |
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File opened: |
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Binary string: |
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Code function: |
4_2_004059F0 | |
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Code function: |
4_2_0040659C | |
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Code function: |
4_2_004027A1 | |
Software Vulnerabilities: |
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| Found inlined nop instructions (likely shell or obfuscated code) |
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Code function: |
5_2_0040E445 | |
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Code function: |
7_2_0008E445 | |
| Potential document exploit detected (performs DNS queries) |
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DNS query: |
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| Potential document exploit detected (performs HTTP gets) |
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TCP traffic: |
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| Potential document exploit detected (unknown TCP traffic) |
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Networking: |
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| C2 URLs / IPs found in malware configuration |
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| Downloads executable code via HTTP |
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HTTP traffic detected: | ||