Office (OOXML) malware analysis — malicious · c68339b291ff835a

MALICIOUS

Office (OOXML)

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

MD5: f21cbd53a217229c1fa4a4e8c15ede2c SHA-1: b62b7643c1f5e3a618b63ea08791d39b8292541d SHA-256: c68339b291ff835a7001ff3a6124da2defefa539d1db6d8769d94b34d8be569a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell 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 VBA code includes a Base64 decoding function, indicating that it likely decodes and executes a malicious payload, possibly downloaded from a remote source.

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` `9bbcbd3998430ff73d6d37ead3db7da75d7feb276d744dd02b8bf38251276a47`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35036 bytes
`vbaProject_00.bin` `22df675ac996080bdd601b73252336a963ff6e21c2487fdf00c102d0e6f14a49`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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