Office (OOXML) malware analysis — malicious · 3cdc769a5a80d5aa

MALICIOUS

Office (OOXML)

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

MD5: 43132135f0cee68c2791242516e74c40 SHA-1: 96fca3a2d60fe0333b85106268e784c923cadb17 SHA-256: 3cdc769a5a80d5aa69dc2b82fe42129ddbdf1196920d79b773282a9270921012

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 macro itself appears to be heavily obfuscated, but its likely intent is to execute malicious commands, potentially downloading a second-stage payload. 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` `595f16eb236cb4c2901483d1eb134d7adb2b369997478ee8ebe2c5e6da6bd822`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `a3f1418fb231b396511bc18e081932806cdd37b38505470407f56d00875ad311`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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