Office (OOXML) malware analysis — malicious · b770193fb4f2284a

MALICIOUS

Office (OOXML)

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

MD5: bb53717279a1d4fc2da12b00afe1be12 SHA-1: 0c1e88174589d90d1a8d0a47b30139e125c00d08 SHA-256: b770193fb4f2284a8881a76257c4375dbbd0d936a4bdb3e8ee1536c003275867

260 Risk Score

Malware Insights

MITRE ATT&CK

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

The OOXML document contains a Workbook_Open macro that references PowerShell and cmd.exe. The critical heuristic OLE_VBA_PS indicates a PowerShell reference within the VBA, and OLE_VBA_WMI_PROCESS_CREATE suggests the use of WMI to launch processes. This indicates the macro is designed to execute a command, likely to download and run a secondary payload.

Heuristics 6

PowerShell reference in VBA critical OLE_VBA_PS

PowerShell reference in VBA
VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE

VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
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` `dc8d758f8a7d0eba16873c7ad64500642ade13cf834f0c37a29296e8b5aff2fd`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	35102 bytes
`vbaProject_00.bin` `9711d9845c5f2328b8339489cfb4e0b78c3954cc5eb380e127eb4e3fd912215a`	vba-project	OOXML VBA project: xl/vbaProject.bin	11264 bytes

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