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Analysis Report Required Order Quantity.xlsx
Overview
General Information
| Sample Name: | Required Order Quantity.xlsx |
| Analysis ID: | 385184 |
| MD5: | 0bbf60240e66e82ba4adf5d8e9b61ba0 |
| SHA1: | d9d2142b4b34e3aad4020dd4d2ee918bd7d34847 |
| SHA256: | 3b4f801135ba694a061a4608da04b1c0935f090b7b4c540bcace9b1bd1eecb9a |
| Tags: | VelvetSweatshopxlsx |
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Detection
FormBook GuLoader
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus detection for dropped file
Early bird code injection technique detected
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Yara detected FormBook
Yara detected GuLoader
C2 URLs / IPs found in malware configuration
Changes the view of files in windows explorer (hidden files and folders)
Creates an undocumented autostart registry key
Detected RDTSC dummy instruction sequence (likely for instruction hammering)
Drops PE files to the user root directory
Drops PE files with benign system names
Drops executables to the windows directory (C:\Windows) and starts them
Hides threads from debuggers
Installs a global keyboard hook
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)
Tries to detect Any.run
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected VB6 Downloader Generic
Adds / modifies Windows certificates
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
Checks if the current process is being debugged
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Deletes files inside the Windows folder
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
Drops PE files to the windows directory (C:\Windows)
Drops certificate files (DER)
Drops files with a non-matching file extension (content does not match file extension)
Enables debug privileges
Found dropped PE file which has not been started or loaded
Found inlined nop instructions (likely shell or obfuscated code)
Found potential string decryption / allocating functions
IP address seen in connection with other malware
Installs a global mouse hook
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)
Office Equation Editor has been started
PE file contains an invalid checksum
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
Tries to load missing DLLs
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
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| Antivirus detection for dropped file |
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| Found malware configuration |
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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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| Office Equation Editor has been started |
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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_00417143 | |
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4_2_00416130 | |
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4_2_004171D7 | |
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4_2_004179F2 | |
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4_2_00417190 | |
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4_2_0041725A | |
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4_2_004172E5 | |
| 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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| Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) |
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| C2 URLs / IPs found in malware configuration |
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| Downloads executable code via HTTP |
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