Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 046eb8961de39127…

MALICIOUS

Office (OLE)

583.5 KB Created: 2007-08-06 10:37:22 Authoring application: Microsoft Excel
MD5: bdb05a46fecdf7d2867b00c2a1089a6f SHA-1: 8ebb75cef8220558fe5da2eebe25b24bf56fbc33 SHA-256: 046eb8961de391270800650187ab9a0821d7456577e63589f317d20cf8e9f1f1
182 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is an Excel file containing VBA macros, specifically a Workbook_Open macro that uses CreateObject to execute code. This strongly suggests the macro is designed to download and execute a second-stage payload. The document body contains what appears to be vehicle manufacturing data, likely a lure to trick the user into enabling macros. The presence of a Workbook_Open macro and CreateObject call are high-confidence indicators of malicious intent.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.vba-programmer.com/
    • http://www.sebthom.de
    • http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=34374&lngWId=1
    • http://www.decisionmodels.com/memlimitsc.htm
    • http://www.decisionmodels.com/memlimitsc.htm�������
    • http://www.dicks-blog.com/excel/2004/06/progress_bar.html
    • http://support.microsoft.com/default.aspx?scid=kb;en-us;832293
    • http://support.microsoft.com/default.aspx?scid=kb;en-us;q313275
    • http://support.microsoft.com/default.aspx?scid=kb;en-us;266161
    • http://www.experts-exchange.com/Applications/Q_10889061.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
35f5fcd508359b680daa670ff939e72b616b73f04e39eeedb6c5d6d0cf1f6f9f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 176377 bytes

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