Office (OOXML) malware analysis — malicious · 9f6a69bd3d05ce02

MALICIOUS

Office (OOXML)

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

MD5: 9194a602fadedaf9736c6cf0d134f9b8 SHA-1: 706f46d5042b36ea64866571f2acd89f24743929 SHA-256: 9f6a69bd3d05ce02132647c54bf68ebcd105c812b8ae4700fa1876e44412664e

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 OOXML document 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 macro code appears to be obfuscated, but the references to cmd.exe and PowerShell indicate a likely intent to download and execute 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` `ae8e65718970868309074da6e1a7763f04d29f009f0be1b8ba5e73eb4229220e`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `cc5b79858726281f05f95e14c977c54d372bd3af5e4d1206666c28632e0bd24b`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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