Office (OOXML) malware analysis — malicious · f5cf7f8b2d6fad3b

MALICIOUS

Office (OOXML)

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

MD5: fcf9378f2dc3a9f544c3e7e5c5560f54 SHA-1: c301e4ad5052d6c72197a99db82f9b88d83f72e6 SHA-256: f5cf7f8b2d6fad3b8694198d0e5a89b2d4c96a82ae36cc05fdbe23cbf09c2fa8

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell 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 code appears to be obfuscated Base64 decoding, likely to execute a malicious payload. The primary function of the script is to decode and execute a second-stage payload, which is a common technique for malware 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` `e246383f6129f19ae99428ec1c453be4fe3f3c3360ad76ebecb01f09adfb5575`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `dca23649cfe1c973f0cd362b085a40288f2bffe1dd0da8132b399397ca16d06d`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.