MALICIOUS
280
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1059.005 Visual Basic
T1204.002 Malicious File
The VBA macro in macros.bas is triggered by the Workbook_Open event. It writes the content of UserForm1.TextBox1.Text to a file named 'webzoon.js' and then executes it using wscript. This indicates the macro's purpose is to download and execute a second-stage payload. The heuristics confirm the presence of VBA macros, a Shell() call, and auto-execution via Workbook_Open, all pointing to a malicious downloader.
Heuristics 7
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Shell() call in VBA critical OLE_VBA_SHELLShell() call in VBA
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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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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.basdcda6a12214135504b038a18748b3dc9973c4a4d2d7faac789a410c6271e0dc9 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 1430 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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