Office (OLE) / .XLS malware analysis — malicious · 4eafb657246a1c39

MALICIOUS

Office (OLE) / .XLS

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

MD5: ec2dc3fe6cc389a05df0912fa0f952a9 SHA-1: 65f6c4afa0458a483c44cfc861c3afb48841f6f6 SHA-256: 4eafb657246a1c39084c67448f6ce5629616cc23d3119e1a871af5c52a67e841

102 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file is an Excel 4.0 spreadsheet containing an Auto_Open macro, which is a strong indicator of malicious intent. The presence of an 'enable lure' heuristic suggests the document attempts to trick the user into enabling macros. The extracted URLs are likely used to download and execute a second-stage payload. The macro sheet itself is too large to analyze in detail, but the presence of the Auto_Open function and the embedded URLs strongly suggest a downloader or droppper functionality.

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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.
URL https://silvertoncc.com/ys1Btp80hx/th.html
- https://christleadersworld.com/1TaIPHnbwbNV/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `740337535414e50f998f7a71055f9de0e2208abc42faca490883ba1d9c48deb1`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	8349 bytes

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