Office (OLE) / .XLS malware analysis — malicious · 94943a54a4ebdf1c

MALICIOUS

Office (OLE) / .XLS

367.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: e7b1c90938afd195cb84697b7b6a783f SHA-1: ad5d7e0a0bbf1dc5b47414610a212091169d638b SHA-256: 94943a54a4ebdf1c1aa0deebc987cd26399beae4f31d7f40338ef739e6576c02

102 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is an Excel 4.0 macro-enabled spreadsheet that uses an Auto_Open macro to execute. It contains a lure to enable macros, a common technique for malware delivery. The extracted URLs are likely used to download and execute a second-stage payload. The XLM macros are designed to download content from the provided URLs.

Heuristics 4

Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME

oletools 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.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook 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.
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Embedded URL info EMBEDDED_URL

One 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://signifysystem.com/ceg7AX7oN0o/ue.html
- https://fcventasyservicios.cl/k60jvjcT/ue.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `c7d4d2bead8580d5104e88300cefa6eb3ebffd421d1191db8449676bfb792ff2`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	8209 bytes

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