Office (OLE) / .XLS malware analysis — malicious · e7325c3a2fe03a4b

MALICIOUS

Office (OLE) / .XLS

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

MD5: 3b21e9a5f0bb5d23361648b4ec109180 SHA-1: 577e25941dbc33edee527e1c21f00d7e87b8fa11 SHA-256: e7325c3a2fe03a4b4065dd03d216a5a6fbdc52f1b124a75db33cdd15d2dd229c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros, including an Auto_Open subroutine, which is a common technique for executing malicious code upon file opening. The ClamAV detection name 'Doc.Downloader.Docusign112100-9908075-0' strongly suggests a downloader functionality. The VBA code itself is heavily obfuscated and truncated, making it difficult to determine the exact payload or destination, but the presence of Auto_Open and the downloader signature indicate a high likelihood of it downloading and executing a second-stage payload.

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` `7cf54625912b6a70c405295d304bfd4a2af89ffbc93f0b4610b641f0bf506356`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4328 bytes

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