Office (OLE) / .XLS malware analysis — malicious · 59eccbcb3333819f

MALICIOUS

Office (OLE) / .XLS

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

MD5: 8e8e19977c7544537d9281c20e0fb44a SHA-1: 65cb0d9a7b9f5e167f2105ad12c0bac65565ab9c SHA-256: 59eccbcb3333819f460aa0590337cfcfa69b1dbf312f01f6bd44c819678dda01

100 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file contains an Excel 4.0 macro (XLM) with an Auto_Open function, which is a known technique for executing malicious code upon opening the spreadsheet. The macro utilizes ShellExecute and dangerous functions like RUN, indicating an intent to download and execute a payload from the embedded URL. The presence of an embedded URL further supports this conclusion.

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://birdexim.com/ds/231120.gif

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `b9e922997ab1008b6d5ca8df5e57db733535c15f4d8d4ecbbf5827b941f024c9`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	6069 bytes

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