Office (OOXML) malware analysis — malicious · 9068f252c70c10e7

MALICIOUS

Office (OOXML)

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

MD5: dfe2208ef8b866220af373d383287774 SHA-1: 764ceeb5c423d73b885587ce47456a1867f2715f SHA-256: 9068f252c70c10e7a705b126ab2f99e27b60a67077d59a6cac737bbd8128b820

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 Office document containing VBA macros. Heuristics indicate the presence of VBA macros, references to PowerShell, and calls to GetObject and cmd.exe. The VBA code appears to be obfuscated, but its intent is likely to execute PowerShell commands to download and run a secondary payload. This suggests a downloader or droppper functionality.

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` `6a08d94d356f0725feb6018ce0137b77bf62227787cd5e699cd1c0aa0bc828da`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `cd8262aa4cd11b23d95f8c252a84ae2ac1ef389b1922b7c2138eb540e411d6e5`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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