Office (OOXML) malware analysis — malicious · 2010a303bccbcf7a

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300

MD5: 7b88b9f2fc90109390cb6c0525bd76d7 SHA-1: a696f5356dcc6dde16e2052e02184b07634503d6 SHA-256: 2010a303bccbcf7a552ca8940bd707768cde402e4dc7306895a0c20f1513a851

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The OOXML document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The presence of a GetObject call further suggests potential exploitation or payload execution. The VBA code includes a Base64 decoding function, which is commonly used to obfuscate malicious payloads.

Heuristics 4

PowerShell reference in VBA critical OLE_VBA_PS

PowerShell reference in VBA
GetObject call high OLE_VBA_GETOBJ

GetObject call
cmd.exe reference in VBA high OLE_VBA_CMD

cmd.exe reference in VBA
VBA project inside OOXML medium OOXML_VBA

Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `dc92a4c793d26e315705478ace13f299647bdb3c4bc85816349fa986f91c0c0a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `fdcf422a9c68f827d8e34d68b53047574415cc28d06ae30a41de197e455d1620`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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