MALICIOUS
260
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1059.001 PowerShell
T1204.002 Malicious File
The XLS file contains a Workbook_Open macro that uses character-shifting functions (Asc, Chr, Mid) to decode and execute a shell command. This is a common technique for downloading and executing a second-stage payload. The macro is auto-executing and uses the Shell() function, indicating a high likelihood of malicious intent.
Heuristics 6
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Shell() call in VBA critical OLE_VBA_SHELLShell() call in VBA
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VBA character-shift decoded Shell command critical OLE_VBA_ASC_CHR_SHIFT_SHELLVBA auto-exec macro stores an encoded command string, decodes it with a Mid/Asc/Chr character-shift loop, and passes the recovered text to Shell. This is a high-confidence command stager.
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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.bas9297bb7de01081ce1cf96cb815f2557efbcd0003ff0ee5a96b9a54ba988fbe23 |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 2702 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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