Office (OOXML) malware analysis — malicious · 2f9cd07692c3d909

MALICIOUS

Office (OOXML)

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

MD5: 2288802b46059ff1fb96ecb3f8b6a8d9 SHA-1: 1a96ea04475ae61b78e80b9a0490ebe91497d042 SHA-256: 2f9cd07692c3d909af785a0253a21718eb0b702bb524c2425f2be9c4bd79149a

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an Excel document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject, suggesting it attempts to execute external commands. The VBA code itself appears to be heavily obfuscated, but its structure and the presence of these indicators strongly suggest it is designed to download and execute a secondary payload. The lack of specific IOCs like URLs or hashes means the exact payload cannot be determined from this sample alone.

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` `b642d20a923f9a64b037104a1945eee05acebc43bd013d0eb00d196627a3886e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `2ed91ecf1aa99992158ecb0b1083ca6962d0e690520cea1b80e150751009d681`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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