Office (OOXML) malware analysis — malicious · 06f4de3c023eac18

MALICIOUS

Office (OOXML)

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

MD5: fb6644de58e5fa3eb127a44b11b21bd8 SHA-1: fe69390e72be2c05bb84df25fbfef244e34c73bf SHA-256: 06f4de3c023eac18972c3883eebd6def967c619b8ca7b86e363c5dbc70617488

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The file is an Office document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject. The VBA macro itself appears to be heavily obfuscated, but its likely purpose is to execute further commands, potentially downloading a second-stage payload. The presence of these elements strongly suggests a malicious macro downloader.

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` `5e82220bcf919957724faf214422ff6da61c690879a49b4b9854dd0ce9d836c8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `cdead6494c29fcd344ca67513d381f3b0b6b7c3af023b82f88a5b254eafe2365`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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