Office (OLE) / .XLS malware analysis — malicious · fa853e7eb226072f

MALICIOUS

Office (OLE) / .XLS

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

MD5: 08a62d5beb61987c4b64bd5dd5e937a9 SHA-1: 35500c4c68a22f602d930f56a593bdbbc6838cab SHA-256: fa853e7eb226072fd307b4b817b37349b3b08ee7331f0d4f4ba5a1921fbe649d

102 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. It contains an Auto_Open macro, which is a common technique for automatic execution upon opening. The presence of an 'enable lure' heuristic indicates the document likely prompts the user to enable macros. The embedded URLs are likely used to download and execute a second-stage payload. The XLM macros themselves were too large to fully analyze for specific actions, but the overall pattern suggests a downloader.

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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