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

Static analysis result for SHA-256 9a1a07caef95485e…

MALICIOUS

Office (OLE) / .XLS

63.0 KB Created: 2025-07-26 14:08:24 Authoring application: Microsoft Excel
MD5: 9c834c208d4f109e1e9e1ec0386525da SHA-1: a35edba7014afb0f0c01930346dad0653966655f SHA-256: 9a1a07caef95485ed3b67cee28cd179755ae10003978601bf3173c31ea5b603b
340 Risk Score

Malware Insights

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

The sample is a Microsoft Excel file containing VBA macros, with a Workbook_Open auto-execution routine. Critical heuristics indicate the use of WScript.Shell and a Shell() call, suggesting the macros are designed to execute commands or download further payloads. The document body prompts the user to 'Enable content to view this SWIFT transaction', a common lure for macro-enabled documents. No specific family could be identified, but the techniques point to a macro-based downloader.

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
e3ed6b9996b4942750c8d2a4bae8fcf7255a3f5d7de4b14277a4d55b6c0fc0a8		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25558 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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