Office (OOXML) malware analysis — malicious · 033af0fc428e6a50

MALICIOUS

Office (OOXML)

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

MD5: ad4d1efc6e24c25f5c2526d00e82cb1c SHA-1: 51c82998eddcd36ebc3cf4a6d686da310e1af73f SHA-256: 033af0fc428e6a50bdf76c7906c254951eaf5a6340b1f42ddfc68fb7be7c79a6

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 contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute commands. The GetObject call further suggests dynamic execution of code. While the VBA code is heavily obfuscated, the presence of these references strongly implies a downloader or initial execution stage for a more malicious payload.

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` `4298a8cd866bfcb1c9b3278571852011bb5016457f072d354f35fb900bc31ce9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `170dfaf61f0549876a57d017fe1467a6caac4b6d014026a84230c451d114a63b`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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