Office (OOXML) malware analysis — malicious · d0fac270e2e4f584

MALICIOUS

Office (OOXML)

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

MD5: 77924702d2bf91322270efd94f7d3be4 SHA-1: ec195faf611f5223e22b03b15c1ed3a12e5fc410 SHA-256: d0fac270e2e4f58448e7eefdae437de1430748416bf1f399f210c674441cdd6c

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The file is an Office document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject. The VBA code itself is heavily obfuscated, but its structure suggests it is designed to decode and execute a PowerShell command. This is a common technique for downloading and executing further malicious content.

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` `f538b8a52805e8fd8c3953405e64c32f77cd5269bd67d1d1f2932eaacef910ea`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `14d17f381ebc09d4fa0cfa0be3a2dc8c72f6eecfa0a9d487d0d2a41754d2ea44`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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