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

Static analysis result for SHA-256 f3b298014a15b763…

MALICIOUS

Office (OLE) / .XLS

568.0 KB Created: 2004-10-13 10:36:43 Authoring application: Microsoft Excel
MD5: 3f87154dc98c5067e5c509086ca16d58 SHA-1: 892d63161bcb32cdddf0b2a2b4a184b07762e971 SHA-256: f3b298014a15b76328afdaad08681e69c4994e29a28642cc6f7fcf5ec3cf1aad
228 Risk Score

Malware Insights

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

The sample is an Excel spreadsheet containing VBA macros, with a critical heuristic firing for a Shell() call within the Workbook_Open auto-execution event. This indicates the macro is designed to execute an external command or program. The document body contains invoice-related text, suggesting a lure for users to open the malicious file. The presence of the Workbook_Open macro and the Shell() call strongly suggests the intent is to download and execute a second-stage payload from one of the unknown-reputation URLs.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_Open macro
  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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 — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.business-spreadsheets.com
    • http://www.business-spreadsheets.com/summary.asp
    • http://www.business-spreadsheets.com/addcookie.asp?id=
    • http://schemas.microsoft.com/office/infopath/2003/sample/Invoice
    • http://schemas.microsoft.com/office/infopath/2003/myXSD
    • http://www.w3.org/1999/xhtml
    • http://www.w3.org/2001/XMLSchema-instance

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
280657852d75ea60eacf989b9210c88ef1cca1751c6ef8f4f06d62b7cc38ba4e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 141785 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved artifact contains 150 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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