MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1059.005 Visual Basic
T1204.002 Malicious File
The Workbook_Open macro is configured to execute a JavaScript file named 'update.js' located in the 'C:\Users\Public\' directory using WScript. This indicates a downloader or initial execution stage. The macro attempts to write content from a worksheet cell to this file, which is then executed. The specific content of the JavaScript is not available, but the overall intent is to download and execute a second-stage payload.
Heuristics 5
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Reference to Windows Script Host high SC_STR_WSCRIPTReference to Windows Script Host
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Workbook_Open macro high OLE_VBA_WBOPENWorkbook_Open macro
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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.basccef7dd6503a547b0346d42af1ba9af476e51e504dae8c06cdd200ab178a97da |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 1316 bytes |
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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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