Office (OOXML) malware analysis — malicious · d62d11cd36d79d39

MALICIOUS

Office (OOXML)

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

MD5: 4a79b44a31b6054f7e384e5a03de501b SHA-1: abb922825f2d3d4f3df4b01ae2c0496c07f2b987 SHA-256: d62d11cd36d79d39ca318e60431ea243f42618cf0434deee39c3ef5e023d51b4

160 Risk Score

Malware Insights

MITRE ATT&CK

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

This Office document contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the critical OLE_VBA_PS heuristic suggest that the VBA code is designed to execute a PowerShell command. This is a common technique for downloading and executing further 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` `891858adea8f1d165ac83114cd2200cf3d9f649e822e64c43712be293deb41b5`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `b6a6e2f8c7f46dc7ebdb8e645e2a55557a25ff83736136ddafa501f234122334`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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