MALICIOUS
102
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.005 Visual Basic
T1105 Ingress Tool Transfer
The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet that contains an Auto_Open macro. It also includes a heuristic indicating a lure to enable macros. The macro sheet contains obfuscated strings that reconstruct two URLs, which are likely used to download and execute a second-stage payload. The presence of the Auto_Open macro and the lure to enable it strongly suggests a malicious intent to execute arbitrary code upon opening.
Heuristics 4
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://escolamundoazul.com.br/ntmQmwXnc6KC/ue.html
- https://laresumeservice.com/wp7rTKrY/ue.html
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txte0f9b32b2cf7d5bbad99732afb6eb8bf95619170305ebee6a87504bc690cca2a |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 8209 bytes |
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