MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
The file is an Excel spreadsheet containing a Workbook_Open macro, a common technique for executing malicious code upon opening. The VBA code is heavily obfuscated, using a custom decoder and calls to CreateObject, Shell, and exec functions, indicating an attempt to download and execute a second-stage payload. The obfuscation and use of auto-execution routines are characteristic of macro-based malware.
Heuristics 5
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Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADERAuto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
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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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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.bas90eb3613a312ef36afd5564dc28b423bfb49e8581d4c0bd4db4b556d26136e92 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 2115 bytes |
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