Office (OLE) / .XLS malware analysis — malicious · d021b75eef6267da

MALICIOUS

Office (OLE) / .XLS

138.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: 4f205d008daf67a72f2cc68194b1e4af SHA-1: d36ec522d8a28b461cb479cd7dbeae031dc13d9c SHA-256: d021b75eef6267da4058fdbd61509df9bf6ef3a57c0d1f400e4dc777813589ac

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.002 Spearphishing Attachment

The file is an Excel spreadsheet containing VBA macros, with both Auto_Open and Auto_Close macros detected. The presence of these macros, combined with the ClamAV detection of 'Doc.Downloader.Docusign112100-9908075-0', strongly suggests that the macros are designed to download and execute a secondary payload. The script itself appears to be primarily focused on manipulating sheet visibility and protection, but the presence of Auto_Open and Auto_Close indicates malicious intent, likely for initial execution and cleanup or further stages.

Heuristics 4

ClamAV: Doc.Downloader.Docusign112100-9908075-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Docusign112100-9908075-0
Auto_Open macro high OLE_VBA_AUTO

Auto_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close macro
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `fb22496bd446d487f3c1e4ff1f3a9cfe52f7b3aaa2723a7a38debb1a03452daa`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5273 bytes

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