Office (OOXML) malware analysis — malicious · 7f381ccac64b69f1

MALICIOUS

Office (OOXML)

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

MD5: eac53c448b710279c8238d3f3f9ba014 SHA-1: 8831059a71a39edaf6e8c563804062399d3ca675 SHA-256: 7f381ccac64b69f143c9f803267856ba722e7d9d865ef2f64d0fb10050616b52

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 OOXML document containing VBA macros. Heuristics indicate the VBA code references cmd.exe and PowerShell, suggesting it's designed to execute commands on the host system. The GetObject call further supports the possibility of object manipulation for malicious purposes. The primary function of the VBA appears to be the execution of external commands, likely for downloading and running additional malicious content.

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` `5aba5a1468396d30844e09256da50106b946a1502586eaa59adb0bc1e8b08b20`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `eee26e869fe1b4fba11869226d2bb18a4184351997cf06b47c92471e9efa11ee`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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