MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The Workbook_Open macro is triggered upon opening the Excel file. It writes a JavaScript file to C:\Users\Public\update.js and then executes it using WScript. The content of the JavaScript file is not provided, but the execution via WScript suggests it is intended to download and execute a second-stage payload. The macro's auto-execution and use of WScript are strong indicators of malicious intent.
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.bas320eddfe30e7021407e09d1de994ebdca6d31bc81a30b78f619eebd6635ca038 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 1315 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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