Office (OOXML) malware analysis — malicious · 39982ff25e3b42a9

MALICIOUS

Office (OOXML)

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

MD5: 2c35e1600cfe193020e7acf92ea43b9d SHA-1: 004196a4dff1e9b0e4abeb33e0b70b112362b522 SHA-256: 39982ff25e3b42a94df652fbe6d41954856165db09c70f9f407f3a471df9b9e8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

This OOXML document contains VBA macros that reference PowerShell and cmd.exe, indicating an attempt to execute arbitrary commands. The GetObject call further suggests potential exploitation or dynamic execution of code. While the VBA code itself is heavily obfuscated, the presence of these references strongly implies a malicious intent to download and execute further payloads or establish persistence.

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` `8e98fbfa2eb25383dc151d461c812c94c00fb17c1842445d9572fe7341b93fb3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `9841e1501681260600c99e1d75b025fa5bed8aac589bdc7b3845a6b3babfe195`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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