Office (OOXML) malware analysis — malicious · 6b6f2161459eb532

MALICIOUS

Office (OOXML)

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

MD5: 5924e6efc625d3d9d9fffdc4c413bf7f SHA-1: d947731c33c6951d14d8e97047e4bb0dda8d892d SHA-256: 6b6f2161459eb532568f51233484e5b08aae75d7a2f29643b834d78aacde040e

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The OOXML document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of a VBA project indicate that the document is designed to execute malicious code. The VBA code appears to be obfuscated, but the references to cmd.exe and PowerShell strongly suggest it's a downloader or dropper for a second-stage 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` `b651eca9f39917b7f9332ae286a2ecddcbd08d5a2899df93e492a75b6bb542e5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `5493a7415d44406d2a610bfb65ddbe64c75b839dd340d6a7119ed3b34dd4df43`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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