Office (OLE) / .XLS malware analysis — malicious · a9a69458191292fd

MALICIOUS

Office (OLE) / .XLS

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

MD5: 4a3a21c22b8c3596474ce320504006d3 SHA-1: 7397d6de8c48a4253363de60669c6e023a4bea52 SHA-256: a9a69458191292fde15454bffd350f86c73a71270ff3fad68b2ed97c4c778156

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) spreadsheet containing an Auto_Open macro, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_AUTOOPEN_DEFINEDNAME heuristics. The SE_ENABLE_LURE heuristic suggests the document prompts the user to enable macros. The presence of embedded URLs points to a downloader or droppper functionality, likely intended to fetch and execute a second-stage payload. The XLM macros are too large to analyze directly, but the overall pattern strongly suggests a malicious macro-based attack.

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

Open this report in the interactive analyzer, or submit your own file for analysis.