Office (OOXML) malware analysis — malicious · b5d0048579cb6250

MALICIOUS

Office (OOXML)

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

MD5: 32cc6ca8c8c87d32b6487a722d2bb701 SHA-1: a75957d853dee87b978fa5b7c651c18edfe57540 SHA-256: b5d0048579cb6250f25b75ebb66e800d0efca4255bc8aca6855774ff6d79aba9

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The OOXML document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The VBA code appears to be obfuscated, but the references to PowerShell and cmd.exe indicate a likely intent to download and execute a second-stage payload. No specific family could be identified due to the obfuscation and lack of concrete indicators.

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` `a53f6d5eb8ca0540a31801f9f355b7a5ca5bea131f6129d88282b74c85a635e4`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `a4d91517191d291dadf3c431dbd634dfb7c460af2ba9a7e320b2a5a95e100e26`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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