Office (OLE) / .XLS malware analysis — malicious · e5015caff93fd84e

MALICIOUS

Office (OLE) / .XLS

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

MD5: ecf8d3cd8aff31b13ab2d15f2603450a SHA-1: 3ec9a98990227da3eb9d98041559da5d499526f2 SHA-256: e5015caff93fd84e0e35c0f67c728a52ef9b06e3688d1ec892c1d9fc4d86adb4

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File T1071.001 Web Protocols

The file contains Excel 4.0 macros, specifically an Auto_Open macro that utilizes the URLDownloadToFile API. This indicates the macro is designed to download a second-stage payload from the embedded URL. The presence of the ClamAV detection 'Doc.Downloader.Docusign0521-9864805-0' further supports its role as a downloader.

Heuristics 6

Reference to URLDownloadToFile API critical SC_STR_URLDOWNLOAD

Reference to URLDownloadToFile API
ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN

Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
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.
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://vytyazhki.by/ds/291120.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `49fcb491caaa166b3c1f74aaa4f2425ca343b5169399ee43c17188a500ea508e`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	983 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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