Office (OOXML) malware analysis — malicious · f577203108b081be

MALICIOUS

Office (OOXML)

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

MD5: 6eac08c3380780ee5ad24da35945755b SHA-1: c5804294bd2e0e7d1ffeb3401379ccfec0303a71 SHA-256: f577203108b081be642d594b0584d8627a15dc12fc3ccabdf3ddaebded94eb24

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 OOXML document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject. The VBA code itself appears to be heavily obfuscated, but its structure suggests it is designed to decode and execute a secondary payload, likely via PowerShell. The presence of these indicators strongly suggests a malicious document designed for payload delivery.

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` `4263d927a8acaf79cb63b4e1e548d276c3e8e43f695a32446ee0017e11346233`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `71f9b13506cf696f7cc5aae4c482007018344699aa254179a215359f82d9d4a2`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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