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Windows Analysis Report
PO-AWE9934.docx

Overview

General Information

Sample Name:PO-AWE9934.docx
Analysis ID:562071
MD5:41d90bec5e345b3f4a7086158e236730
SHA1:5a179b748a9523ac4cd1b4010f294e5497b5329e
SHA256:76772145ed4ca48917df45363d450652cba0605b307d85937166c3042ea85609
Tags:docdocxInvoice
Infos:

Detection

GuLoader
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Found malware configuration
Multi AV Scanner detection for submitted file
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: File Dropped By EQNEDT32EXE
Antivirus detection for URL or domain
Yara detected GuLoader
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Sigma detected: Execution from Suspicious Folder
Office equation editor drops PE file
Contains an external reference to another file
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Document has an unknown application name
May sleep (evasive loops) to hinder dynamic analysis
Contains functionality to shutdown / reboot the system
Uses code obfuscation techniques (call, push, ret)
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
Detected potential crypto function
JA3 SSL client fingerprint seen in connection with other malware
Contains functionality to call native functions
Contains functionality to dynamically determine API calls
Found dropped PE file which has not been started or loaded
Potential document exploit detected (performs DNS queries)
IP address seen in connection with other malware
Downloads executable code via HTTP
Uses insecure TLS / SSL version for HTTPS connection
Contains functionality for execution timing, often used to detect debuggers
Document misses a certain OLE stream usually present in this Microsoft Office document type
Abnormal high CPU Usage
Document contains no OLE stream with summary information
Potential document exploit detected (unknown TCP traffic)
PE file contains strange resources
Drops PE files
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Office Equation Editor has been started
Binary contains a suspicious time stamp
Drops PE files to the user directory
Potential document exploit detected (performs HTTP gets)
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard

Classification

  • System is w7x64
  • WINWORD.EXE (PID: 1124 cmdline: "C:\Program Files\Microsoft Office\Office14\WINWORD.EXE" /Automation -Embedding MD5: 9EE74859D22DAE61F1750B3A1BACB6F5)
  • EQNEDT32.EXE (PID: 3004 cmdline: "C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding MD5: A87236E214F6D42A65F5DEDAC816AEC8)
    • vbc.exe (PID: 2516 cmdline: "C:\Users\Public\vbc.exe" MD5: 38034F18AF511C3B04B25170735E8B8E)
  • cleanup
{"Payload URL": "https://www.konutmarket.com/2022file_iz"}
SourceRuleDescriptionAuthorStrings
00000009.00000002.722712672.0000000003690000.00000040.00000800.00020000.00000000.sdmpJoeSecurity_GuLoader_2Yara detected GuLoaderJoe Security

    Exploits

    barindex
    Source: File createdAuthor: Joe Security: Data: EventID: 11, Image: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE, ProcessId: 3004, TargetFilename: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\XNHC0JWC\vbc[1].exe

    System Summary

    barindex
    Source: Process startedAuthor: Florian Roth: Data: Command: "C:\Users\Public\vbc.exe" , CommandLine: "C:\Users\Public\vbc.exe" , CommandLine|base64offset|contains: , Image: C:\Users\Public\vbc.exe, NewProcessName: C:\Users\Public\vbc.exe, OriginalFileName: C:\Users\Public\vbc.exe, ParentCommandLine: "C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding, ParentImage: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE, ParentProcessId: 3004, ProcessCommandLine: "C:\Users\Public\vbc.exe" , ProcessId: 2516
    Source: Process startedAuthor: Florian Roth: Data: Command: "C:\Users\Public\vbc.exe" , CommandLine: "C:\Users\Public\vbc.exe" , CommandLine|base64offset|contains: , Image: C:\Users\Public\vbc.exe, NewProcessName: C:\Users\Public\vbc.exe, OriginalFileName: C:\Users\Public\vbc.exe, ParentCommandLine: "C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding, ParentImage: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE, ParentProcessId: 3004, ProcessCommandLine: "C:\Users\Public\vbc.exe" , ProcessId: 2516

    Click to jump to signature section

    Show All Signature Results

    AV Detection

    barindex
    Source: 00000009.00000002.722712672.0000000003690000.00000040.00000800.00020000.00000000.sdmpMalware Configuration Extractor: GuLoader {"Payload URL": "https://www.konutmarket.com/2022file_iz"}
    Source: PO-AWE9934.docxVirustotal: Detection: 26%Perma Link
    Source: PO-AWE9934.docxReversingLabs: Detection: 16%
    Source: http://107.172.93.32/invoice/dhl_shp.wbkAvira URL Cloud: Label: malware
    Source: http://107.172.93.32/309/vbc.exeAvira URL Cloud: Label: malware

    Exploits

    barindex
    Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXEProcess created: C:\Users\Public\vbc.exe
    Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXEProcess created: C:\Users\Public\vbc.exeJump to behavior
    Source: unknownProcess created: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE "C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49168 version: TLS 1.0
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49169 version: TLS 1.0
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49170 version: TLS 1.0
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49171 version: TLS 1.0
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49176 version: TLS 1.0
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49177 version: TLS 1.0
    Source: C:\Program Files\Microsoft Office\Office14\WINWORD.EXEFile opened: C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4940_none_08e4299fa83d7e3c\MSVCR90.dllJump to behavior
    Source: unknownHTTPS traffic detected: 66.29.141.207:443 -> 192.168.2.22:49167 version: TLS 1.2
    Source: Binary string: secur32.pdb source: secur32.dll.9.dr
    Source: Binary string: SxsStore.pdb source: sxsstore.dll.9.dr
    Source: Binary string: secur32.pdbUGP source: secur32.dll.9.dr
    Source: Binary string: SxsStore.pdbGCTL source: sxsstore.dll.9.dr