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

Static analysis result for SHA-256 a845d78bb580f0e9…

MALICIOUS

Office (OLE) / .XLS

58.5 KB Created: 2025-07-26 14:08:24 Authoring application: Microsoft Excel
MD5: eeef8d43d5c01e722708f5ac11b9a376 SHA-1: c6b949596eadacf12d1c18eb67d47af334123b4f SHA-256: a845d78bb580f0e945968e893f9359bcc4aa001489e73a49c8c9876190cda2df
342 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is an Excel file containing VBA macros, with a Workbook_Open event triggering a Shell() call via WScript.Shell. This indicates the macro attempts to execute arbitrary commands. The document body prompts the user to 'Enable content to display this SWIFT transaction', a common social engineering tactic to bypass macro security warnings. No specific malware family was identified, but the techniques suggest a downloader or initial access payload.

Heuristics 9

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d63730556ffc13b939a581131b4f8f094d6fb6f0c36eaa125dc5985e87cae434		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12333 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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