MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
T1059.001 PowerShell
The sample is an Excel file containing a large VBA macro, indicated by the OLE_VBA_MACROS heuristic. The presence of a Workbook_Open macro and CreateObject calls, along with VBA p-code auto-execution, strongly suggests malicious intent. The macro likely attempts to download and execute a second-stage payload, as evidenced by the 'macros.bas' artifact and the obfuscated VBA strings. The document body content appears to be Japanese text related to data entry and reporting, likely serving as a lure.
Heuristics 5
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Workbook_Open macro high OLE_VBA_WBOPENWorkbook_Open macro
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CreateObject call high OLE_VBA_CREATEOBJCreateObject call
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VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXECCompiled 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.
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Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGEOne 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.
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VBA macros detected medium OLE_VBA_MACROSDocument contains VBA macro code
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.basb70d95e1ea913d9c57eee37ea574ac3f46adb1c6d3fe0cf73350738cda39d042 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 206688 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 29 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
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