Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1b32af1767d46421…

MALICIOUS

Office (OLE)

338.5 KB Created: 2010-03-09 11:26:00 Authoring application: Microsoft Office Word
MD5: 6401f9313730092d41d2f879c38b8b47 SHA-1: f2a84e39fb77769defafb03923ae73c57982a398 SHA-256: 1b32af1767d46421be25193106d57856e44c7f6ce8c83853bf8699942c6613a0
200 Risk Score

Malware Insights

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

The sample is an Office document containing a malicious VBA macro. The macro utilizes `CreateObject` and a `Document_Open` auto-executing function, indicating it's designed to run code upon opening. This suggests the macro's purpose is to download and execute a second-stage payload from one of the embedded URLs. The presence of Excel 4.0 macros also indicates a potential for broader macro-based attack vectors.

Heuristics 7

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
  • 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://knowledgebase/methods/ddm/index.asp�
    • http://deticaportal/sites/siglanding/ddm_sig/Products/Review

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
18caea9059a637569fbaa7bd6cf94ca7451482f8fe314e1a2f2a74649cca4fb1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 81166 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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