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Edit tourWindows Analysis Report Form BA.xlsx
Overview
General Information
| Sample Name: | Form BA.xlsx |
| Analysis ID: | 452641 |
| MD5: | f683a8eb2e17866a194af9b23efda095 |
| SHA1: | b3002f93d24336a9af003a7a3da36217a7d7b8db |
| SHA256: | e6de55ef568521e22566496d9df49eb1a4cf2ea94082d8d0bcd357f41d2962ef |
| Tags: | VelvetSweatshopxlsx |
| Infos: | |
Most interesting Screenshot:  | |
Detection
FormBook
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sigma detected: Droppers Exploiting CVE-2017-11882
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
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Injects a PE file into a foreign processes
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)
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Execution from Suspicious Folder
Sigma detected: Suspicious Process Start Without DLL
Sigma detected: Suspicious Rundll32 Without Any CommandLine Params
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 to access loader functionality (e.g. LdrGetProcedureAddress)
Contains functionality to call native functions
Contains functionality to read the PEB
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
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 potential string decryption / allocating functions
HTTP GET or POST without a user agent
IP address 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)
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
Process Tree |
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Malware Configuration |
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Threatname: FormBook |
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{"C2 list": ["www.gaigoilaocai.com/wufn/"], "decoy": ["rsautoluxe.com", "theroseofsharonsalon.com", "singnema.com", "nathanielwhite108.com", "theforumonline.com", "iqpt.info", "joneshondaservice.com", "fafene.com", "solanohomebuyerclass.com", "zwq.xyz", "searchlakeconroehomes.com", "briative.com", "frystmor.city", "systemofyouth.com", "sctsmney.com", "tv-safetrading.com", "thesweetboy.com", "occulusblu.com", "pawsthemomentpetphotography.com", "travelstipsguide.com", "verifypurchase.online", "333s998.com", "amsmapped.com", "mimortgageexpert.com", "joshuatreeresearch.com", "brasilupshop.com", "support24h.site", "recipesdunnright.com", "feathertiara.net", "intoxickiss.com", "greenmommarket.com", "prinothhusky.com", "800pls.info", "martabaroagency.com", "neosinder.com", "davidwarburg.com", "chinanl168.com", "organicdiscover.com", "kingdomvets.com", "thetravellingwitch.com", "kyg-cpa.com", "bigarius.com", "collegevillepaareahomes.com", "ashestore.site", "rizqebooks.com", "techwhose.com", "peak-valleyadvertising.com", "craftbychristians.com", "laterlifelendingsupermarket.com", "setadragon.com", "pon.xyz", "reshemporium.com", "missk-hair.com", "hk6628.com", "rootmoover.com", "thetew.com", "mybodysaver.com", "cuadorcoast.com", "goteclift.com", "solisdq.info", "hsicclassactionsettlement.com", "cummingsforum.com", "talleresmulticar.com", "qq4004.com"]}Yara Overview |
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Memory Dumps |
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| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_FormBook | Yara detected FormBook | Joe Security | ||
| Formbook_1 | autogenerated rule brought to you by yara-signator | Felix Bilstein - yara-signator at cocacoding dot com |
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| Formbook | detect Formbook in memory | JPCERT/CC Incident Response Group |
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| JoeSecurity_FormBook | Yara detected FormBook | Joe Security | ||
| Formbook_1 | autogenerated rule brought to you by yara-signator | Felix Bilstein - yara-signator at cocacoding dot com |
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| Click to see the 13 entries | ||||
Sigma Overview |
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Exploits: |   |
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| Sigma detected: EQNEDT32.EXE connecting to internet | Show sources | ||
| Source: | Author: Joe Security: | ||
| Sigma detected: File Dropped By EQNEDT32EXE | Show sources | ||
| Source: | Author: Joe Security: | ||
System Summary: | |
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| Sigma detected: Droppers Exploiting CVE-2017-11882 | Show sources | ||
| Source: | Author: Florian Roth: | ||
| Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments | Show sources | ||
| Source: | Author: Oleg Kolesnikov @securonix invrep_de, oscd.community: | ||
| Sigma detected: Execution from Suspicious Folder | Show sources | ||
| Source: | Author: Florian Roth: | ||
| Sigma detected: Suspicious Process Start Without DLL | Show sources | ||
| Source: | Author: Florian Roth: | ||
| Sigma detected: Suspicious Rundll32 Without Any CommandLine Params | Show sources | ||
| Source: | Author: Florian Roth: | ||
Jbx Signature Overview |
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Click to jump to signature section
Show All Signature Results
AV Detection: | |
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| Found malware configuration | Show sources | ||
| Source: | Malware Configuration Extractor: | ||
| Multi AV Scanner detection for submitted file | Show sources | ||
| Source: | Virustotal: | Perma Link | ||
| Source: | ReversingLabs: | |||
| Yara detected FormBook | Show sources | ||
| Source: | File source: | ||
| Source: | File source: | ||
| Source: | File source: | ||
| Source: | File source: | ||
| Source: | File source: | ||
| Source: | File source: | ||
| Machine Learning detection for dropped file | Show sources | ||
| Source: | Joe Sandbox ML: | ||
| Source: | Joe Sandbox ML: | ||
| Source: | Avira: | ||
| Source: | Avira: | ||
| Source: | Avira: | ||
Exploits: | |
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| Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) | Show sources | ||
| Source: | Process created: | |||
| Source: | Process created: | Jump to behavior | ||
| Source: | Process created: | ||
| Source: | File opened: | Jump to behavior | ||
| Source: | Binary string: | ||
| Source: | Binary string: | ||
| Source: | DNS query: | ||
| Source: | TCP traffic: | ||
| Source: | TCP traffic: | ||
| Source: | Memory has grown: | ||
Networking: | |
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| Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) | Show sources | ||
| Source: | Snort IDS: | ||
| Source: | Snort IDS: | ||
| Source: | Snort IDS: | ||
| C2 URLs / IPs found in malware configuration | Show sources | ||
| Source: | URLs: | ||
| Performs DNS queries to domains with low reputation | Show sources | ||
| Source: | DNS query: | ||
| Source: | HTTP traffic detected: | ||