Office (OOXML) malware analysis — malicious · d1e62716b2b5c2f7

MALICIOUS

Office (OOXML)

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

MD5: 1f1e5e5c79ec20480b36cc25c49c2d52 SHA-1: ce554bf370be72dc81dcd04b17e5988084fa2a04 SHA-256: d1e62716b2b5c2f72a8bc4a049a67e28c7b70fb8376a434e25268892dc851b52

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

The OOXML file contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of a VBA project strongly suggest malicious intent. The VBA code appears to be obfuscated, but the primary function is likely to download and execute a secondary payload using PowerShell.

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` `6c7ab74dba00ddcbcc3cc661b2666a5f65c117d1b43b3f082baba7592b9a1a45`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `ae9b5a096a8806a4f7aee76dbeb7d2994caffe18ac6dfa2f5b48ecb8d3635394`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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