Office (OLE) / .XLS malware analysis — malicious · bfcefc39a4d43b8d

MALICIOUS

Office (OLE) / .XLS

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

MD5: 580eedfa0a495bc532240f2955602f40 SHA-1: 4f004543fa9072e1cb7dcfd2d29a1c59dd59bb13 SHA-256: bfcefc39a4d43b8dcd155184f9d9f5022670dfdee2ae5fe4afa08cc115001b1f

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros, including an Auto_Open macro, which is a common technique for initial execution. The ClamAV detection 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. While the provided VBA code primarily manipulates sheet visibility and shape display, the presence of Auto_Open and the ClamAV signature indicate a high likelihood of malicious intent, possibly to download and execute a secondary payload. The SHA256 hash is included as a primary IOC.

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` `cd468214d3d2de6ed0e54668d5bbf78b9464f08618e981095b737862968ab57b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5239 bytes

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