Office (OLE) / .XLS malware analysis — malicious · 1f24dc70aa3be6d1

MALICIOUS

Office (OLE) / .XLS

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

MD5: 379f71d4e171335601f517922eb41111 SHA-1: 3360cbe243e784a65a1816fdde8687a588c284d2 SHA-256: 1f24dc70aa3be6d1e4781dd7c43bff13c49cf81e412594ff9a890fdde1b6f075

102 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains Excel 4.0 macros, specifically an Auto_Open entry, which is a strong indicator of malicious intent. The presence of an 'enable lure' heuristic suggests the document is designed to trick users into enabling macros. The embedded URLs are likely used to download and execute a second-stage payload. The confidence is slightly reduced due to the lack of script content to directly confirm the payload execution mechanism.

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://mayread.com/aXfFF8qdsV/th.html
- https://tpcsv.neosj.why3s.tw/XjHoDakG/th.html

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `7758cbebef832a37ce0a327fd7d893202195f03ba9b854edef74b19dbb11678f`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	8349 bytes

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