Office (OOXML) malware analysis — malicious · 7d9196d3e508f40b

MALICIOUS

Office (OOXML)

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

MD5: 89e34a14b6718b7469f67b2bb9d5af98 SHA-1: 2bd75b31a44f09791484bf67453dc00eeccab39a SHA-256: 7d9196d3e508f40bbe49a451853f050ba7ccc3ce39a4842fb8e83e4e316f0aa0

160 Risk Score

Malware Insights

MITRE ATT&CK

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

This Office Open XML document contains VBA macros that reference cmd.exe and PowerShell. The critical heuristic 'OLE_VBA_PS' indicates a PowerShell reference within the VBA code. The presence of a VBA project and the GetObject call further suggest malicious intent. The macros are likely used to download and execute a secondary payload, a common technique for initial compromise via spearphishing attachments.

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` `6f1fd72b9daa449b18706d3a11a2a4fc199f999a948790228abe4a2b1c2c80a2`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `25a345653e27380eff856196f57683ebd6ecbc98ddedda48f27c2ba41cb8aad6`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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