Office (OLE) / .XLS malware analysis — malicious · d2b7906fa2809604

MALICIOUS

Office (OLE) / .XLS

118.5 KB Created: 2015-02-06 06:18:59 Authoring application: Microsoft Excel

MD5: cc214c9e839e3f61617e3933533a4f4d SHA-1: fd646cdb11c99ddd86bfe8fa374d4acb52691d83 SHA-256: d2b7906fa2809604afd0d2f90fa76804351f1871a291781b32e77db8969f33a2

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1059.001 PowerShell

The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet. Heuristics indicate the presence of an Auto_Open macro and the use of dangerous formula APIs, specifically the RUN function. The document body contains a social engineering lure, claiming it was created in an online version of Excel and instructing the user to 'Enable Editing' and 'Enable Content'. No specific malware family is identifiable from the provided evidence.

Heuristics 3

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.
XLM Auto_Open with dangerous formula APIs critical 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `14eec81c5f601e4347c62e669bf912e1b15a8b06f4070c17a740ac804245bca2`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	60035 bytes

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