Office (OLE) / .DOC malware analysis — malicious · 71a037ebd8ca002e

MALICIOUS

Office (OLE) / .DOC

12.5 KB First seen: 2022-05-26

MD5: c9155eb08055cf859c411086a5968d4a SHA-1: aaf491f80a2c55378909893c3f7181aa73c1aa7c SHA-256: 71a037ebd8ca002ed9cf033305a6ba14bd205d262307c606a78aa53ca21234b6

140 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a Workbook_Open VBA macro that writes a JavaScript file to disk and then executes it using WScript. This indicates an attempt to download and execute a second-stage payload. The macro explicitly constructs the command 'WSCRIPT C:\Users\Public\update.js' to run the downloaded script.

Heuristics 4

Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `f278ec9088770f12e49484d33b87bb3428003999ced5dbd8e8b6fd0c042dce8a`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1306 bytes

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