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

Static analysis result for SHA-256 31b41c8a23ecf27d…

MALICIOUS

Office (OLE) / .XLSX

552.5 KB Created: 2015-01-05 16:28:02 Authoring application: Microsoft Excel
MD5: 84411c87ef9de946354f73665426991c SHA-1: 9507f390d773a6c66030936b47382489f1620d45 SHA-256: 31b41c8a23ecf27dcbd245ae0548e4e86e391a594969c46a219a1bf3c36e242c
338 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is an Excel file containing a Workbook_Open VBA macro that uses Shell() and CreateObject() calls. This macro is designed to download and execute a second-stage payload from one of the embedded URLs. The document body heuristics indicate a lure related to invoices or advance-fee scams, suggesting a phishing or social engineering delivery mechanism.

Heuristics 11

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
    URL https://ort8J-zG$zo8J-zG$zpedicaig�u������W���
    • https://india.anagenhairtr2\SoV#oa
    • https://yaAC//C,madaondonto.precocalculado.com.br/under-the-ilgts/cache/fY7p2DctGJ1JFR.php
    • https://mobileadsit.coM0kV*4m/codeigM0kV*4niter/application/views/erroM0kV*4rs/cliM0kV*4/Rw0URmEaVu.php
    • https://saudagar.pk/wpnY|tM-nY|tMcontenY|tMnt/themes/twentytwentyone/templatnY|tMe-partsnY|tMnY|tM/content/jupJixGzH.php
    • https://ort8J-zG$zo8J-zG$zpedicaiguassu.com.b8J-zG$zr/post8J-zG$z8J-zG$zs/yi8fIfzNzb.php
    • https://india.anagenhairtr2\SoV#oansplantclinics.com/js/hair-transplant-graft/css/nn2aLrFQR3.php
    • https://ana.aulasd
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
    • http://ns.adobe.com/illustrator/1.0/
    • http://ns.adobe.com/xap/1.0/t/pg/
    • http://ns.adobe.com/xap/1.0/sType/Dimensions#
    • http://ns.adobe.com/xap/1.0/g/
    • http://ns.adobe.com/photoshop/1.0/
    • http://www.iec.ch

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1702cfe132f749ad1ae77ab9cee866cfc419e244afa813c23a39bfb79cdb7a68		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 120061 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

Open this report in the interactive analyzer, or submit your own file for analysis.