Office (OLE) / .XLS malware analysis — malicious · 9e08ec0e07eaf00a

MALICIOUS

Office (OLE) / .XLS

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

MD5: 8fb7bf7c8335f320a2121d9334112c02 SHA-1: 793fbeb3fd5e97f988bb921a45b43cab9608b01d SHA-256: 9e08ec0e07eaf00ad5f7a7faaaabfead398c52bd4c31f31dd425af29a989d038

102 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical heuristic firing indicates the presence of an Excel 4.0 Auto_Open macro, which is designed to execute automatically when the workbook is opened. The sample also contains heuristics for enabling lures, suggesting the user will be prompted to enable macros. The embedded URLs are likely used to download a second-stage payload. The macro sheet is too large to fully parse, but the presence of the Auto_Open entry is sufficient for this assessment.

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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