Office (OOXML) malware analysis — malicious · 3bb722b0e898f2b6

MALICIOUS

Office (OOXML)

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

MD5: 4c7be9ca643f4fa42b56addfd5b8afd5 SHA-1: 563f434d3ff3d7e3d29c8512db92d8c8339c26c2 SHA-256: 3bb722b0e898f2b6006ca33a2e0200c6e18d0160fa97c3e07dc9463277d7cf51

160 Risk Score

Malware Insights

MITRE ATT&CK

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

This Excel document contains VBA macros that reference PowerShell and cmd.exe. The GetObject call and the presence of VBA macros suggest an attempt to execute malicious code. The VBA code includes a Base64 decoding function, indicating that it likely decodes and executes a payload, potentially downloaded from a remote source.

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` `58dc0b44385b6c13c9fedcdef36511f2468266d20d2dd882c51fec0fc1f66786`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `9e9e65861bd4da71960fd66701d25749afc5b57a318f6184baa8c7425443369d`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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