Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 a08a1c972255fdf3…

MALICIOUS

Office (OLE) / .XLS

624.0 KB Created: 2006-03-07 04:08:37 Authoring application: Microsoft Excel
MD5: 55948ec74e415d306696cb56bc8087bc SHA-1: 2dc1fd76b73bee31d1b455a31722f944b0e2600a SHA-256: a08a1c972255fdf394b1177a96608bd9c2400d466e06c749b485aadfc8ec029b
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The sample is an Excel spreadsheet containing a Workbook_Open VBA macro that uses CreateObject to execute code. The document body describes a financial modeling tool and prompts the user to enable macros, indicating a social engineering lure. The Workbook_Open macro likely downloads and executes a secondary payload from one of the embedded URLs, such as http://www.csquest.com/QUEST/other/Validation_ModellerWS.asp. The presence of VBA auto-execution with execution terms strongly suggests malicious intent.

Heuristics 6

  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.csquest.com
    • http://tempuri.org/ModellerWebService/ModellerWebService.asmx/
    • http://www.csquest.com/QUEST/other/Validation_ModellerWS.asp
    • http://www.csquest.com/QUEST/OTHER/ModellerWebService/ModellerWebService.asmx
    • http://tempuri.org/ModellerWebService/ModellerWebService.asmx/�
    • http://www.csquest.com/QUEST/other/Validation_ModellerWS.asp�
    • http://www.csquest.com�
    • http://QUEST/QUEST/other/Validation_ModellerWS.asp
    • http://QUEST/QUEST/OTHER/ModellerWebService/ModellerWebService.asmx
    • http://www.collins-stewart.com/legal_coi.html
    • http://tempuri.org/ModellerWebService/ModellerWebService.asmx
    • http://www.w3.org/2001/XMLSchema-instance
    • http://www.w3.org/2001/XMLSchema
    • http://schemas.xmlsoap.org/soap/envelope/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
df1db3bee2bc9b099a49272b108fe90d1be807fdc7941ec548c2e2c77ca6821b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 186486 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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