Office (OOXML) malware analysis — malicious · 752819d01a975087

MALICIOUS

Office (OOXML)

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

MD5: d660ce42284e7f715e3b2ddf6b5c0a99 SHA-1: 18eb7dbb6af980af7cb5c0b2ea14366f2c6f5f41 SHA-256: 752819d01a9750875a19bdea9607290dc15fe3b2cb5f45f0faf8047948e79c1f

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. Heuristics indicate the macros reference PowerShell and cmd.exe, and use GetObject. The VBA code itself appears to be heavily obfuscated, but the presence of these indicators strongly suggests it's designed to execute further commands, likely downloading and running a second-stage payload. The specific obfuscation technique used in the VBA macro is not fully decipherable, leading to a slightly reduced confidence.

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` `ebeeb349633b2fe3e1621483255181a5dba6371817d1e6116012cb71e1611307`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `f19c4a5762af50ab970bbe344e53a983fdee9776c059f529b63c832bba6e54ce`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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