Office (OOXML) malware analysis — malicious · 08ff6417d27c7845

MALICIOUS

Office (OOXML)

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

MD5: b894d4e0f8582f9a84ef5281e0aa46c8 SHA-1: a4751d119c98dad44623a06187f05e28c6c7e34b SHA-256: 08ff6417d27c78459ee2e9d947d2e70ae1785d45af62699e1345e8e0e4257cf6

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is an Office 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 download and execute a second-stage payload. The presence of these elements strongly suggests a malicious macro downloader.

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` `cf437cef002ab98e7619eed4c2a112a4444e20125c3ad660cce38371b4e8def8`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `f428ce7d7f574134b1bef9d27911ff4aa580f83dd6de56cedbc4c9e0cbd99613`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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