Office (OOXML) malware analysis — malicious · f4b7c448588b1e66

MALICIOUS

Office (OOXML)

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

MD5: 6321da5cff21177645dc8f670c404f53 SHA-1: 8317335a282895140e0be2b32518277fb4dd32d1 SHA-256: f4b7c448588b1e669ea37985790a6bbf9905ddd643a66e9efe4619d82e0121b4

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 malicious code. The script's primary function appears to be downloading and executing a second-stage payload, though the specific URL or command is obfuscated within the macro.

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` `d0beb648b303489fe714ea9f3599805f5ec667d6deea89fcf8e5bb0e822f94da`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	34430 bytes
`vbaProject_00.bin` `63abae758789fcc18537038940e2ce7896d681dcb5cd8cea09d26b02e62f801d`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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