Office (OLE) / .XLSX malware analysis — malicious · 746546ec80bb280d

MALICIOUS

Office (OLE) / .XLSX

147.0 KB Created: 2019-06-03 07:04:22 Authoring application: Microsoft Excel First seen: 2023-02-06

MD5: fd0880a600d8378b4e1fbe6f2226213f SHA-1: aac75acd6bea86e8bcb03704de70f74f40d667f4 SHA-256: 746546ec80bb280de2016b6169eb5bbd271cf4ab420ed1ed562553392ee3e7f3

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing with Attachment T1059.005 Visual Basic

The file is an Excel spreadsheet containing VBA macros, including Auto_Open and Auto_Close functions, which are commonly used for malicious purposes. The document body content mimics shipping and payment details, suggesting a lure to entice the user to enable macros. The Auto_Open macro attempts to save a copy of itself as 'mypersonnel.xls' in the Excel startup folder and sets an Auto_Open handler, indicating an attempt at persistence and execution of further malicious actions.

Heuristics 4

ClamAV: Xls.Malware.ExcelSic-10004731-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Malware.ExcelSic-10004731-1
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` `0e027d7c75d49f79cc7aa4389acfebf7b55f41d2ad86258589318b07847f19ae`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1816 bytes

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