Office (OLE) / .XLS malware analysis — malicious · 4b4e710bfc3b59c6

MALICIOUS

Office (OLE) / .XLS

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

MD5: 993e59723c821f9d0e9534c40df776fc SHA-1: 545781db78e7c2ae0f2bb35990636a8ff71d4406 SHA-256: 4b4e710bfc3b59c6001261687e70e55822782448a4b042ce5ca3465cfc67c348

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is an Excel 4.0 macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro that uses dangerous functions, specifically ShellExecute and RUN, to execute commands. This macro is likely designed to download and execute a second-stage payload from the embedded URL. The confidence is slightly reduced due to the lack of direct script content for deeper analysis.

Heuristics 4

Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
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.
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 https://dtmh.gr/ds/231120.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `56028e1aaff784c0ad7279a6790acbda557776a958b2dd9faa77c4f8894b8439`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	6064 bytes

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