Office (OOXML) malware analysis — malicious · e8fef2919dfef9ce

MALICIOUS

Office (OOXML)

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

MD5: 8424c6c311f2bb52c27cb11c92175dfa SHA-1: c3c67ed0559b3fd25c9d32a5faa8f6270e818b4d SHA-256: e8fef2919dfef9ce43f8331be243cbb03812ac731e993a922c5ee84b3b7bb0a0

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. The macros reference PowerShell and cmd.exe, indicating an attempt to execute commands. The GetObject call is also suspicious. These heuristics suggest the VBA code is designed to download and execute a secondary payload, a common technique for initial access via malicious documents.

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` `88f848c55fe6e61c66d09cd92b77dad3cb3e039072a899b8fd6db6df2f399086`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `29c334a2de6d9ecffedb857ffbff91065f78e55190df8c04247adf52dc13db50`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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