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

Static analysis result for SHA-256 a32ed769450fbedc…

MALICIOUS

Office (OLE) / .XLS

147.5 KB Created: 2003-12-12 16:09:51 Authoring application: Microsoft Excel
MD5: 7e3640bacc3acd7b109a83bc5b0105d7 SHA-1: addd0077fe95f5872ec84a16501cdc5d3243d6dd SHA-256: a32ed769450fbedcbcd8faae05c74e1e6501d4871e3d737deb36722ae4c999e1
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

This XLS file contains a Workbook_Open VBA macro that is triggered automatically when the workbook is opened. The macro utilizes a CreateObject call, indicating it's designed to execute arbitrary code. While the specific payload is not detailed, the presence of a VBA auto-execution mechanism strongly suggests a malicious intent, likely to download and execute a second-stage payload or establish persistence. No specific family could be identified, but the technique is common for initial access.

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://ocsp.verisign.com0
    • https://www.verisign.com/rpa
    • https://www.verisign.com/rpa01
    • http://crl.verisign.com/pca3.crl0
    • http://CSC3-2004-crl.verisign.com/CSC3-2004.crl0D
    • https://www.verisign.com/rpa0
    • http://CSC3-2004-aia.verisign.com/CSC3-2004-aia.cer0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
ea85f4b4b247324e61f49739f4413fd86dc95fc00de1f7eda3b8d4fc5c96bd87		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 35583 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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