Office (OLE) / .XLS malware analysis — malicious · 3f0ebfb10137a802

MALICIOUS

Office (OLE) / .XLS

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

MD5: aa629db0371c0836025395130c62e84b SHA-1: 1865cac23b1a650e2181e0894c499f3fd53dd885 SHA-256: 3f0ebfb10137a8027c9bf46a64216ec2c88ed2555586ffd7c505bce1fc304e5e

102 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open entry, which is a strong indicator of malicious intent. The presence of a 'Macro/content-enable lure' heuristic suggests the document is designed to trick the user into enabling macros. The extracted URLs are likely used to download further payloads. The XLM macros are likely responsible for executing the malicious payload and interacting with the 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 — 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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