Office (OOXML) malware analysis — malicious · e312b597d1c2164d

MALICIOUS

Office (OOXML)

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

MD5: 958eb1f4f5777ad4b33a01bed3c58367 SHA-1: f0f74581cc5dc670ac1187cc723c68f7e7ba7391 SHA-256: e312b597d1c2164d3ca45b6ac27601b582465f2a762fe4486def9faba960e228

160 Risk Score

Malware Insights

MITRE ATT&CK

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

The OOXML file contains VBA macros that reference cmd.exe and PowerShell. The GetObject call and the presence of VBA macros suggest an attempt to execute arbitrary code. The VBA code appears to be obfuscated, but the references to cmd.exe and PowerShell indicate a likely downloader or executioner of a second-stage payload.

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` `c51a2d13c47950f6c43650762237904a5e86e0dca7d06643e3f1f15bf8502a13`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `162e04cc89ca8c95b42b87772531ca2fecc30d286123a5eed117a254c9b14800`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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