Office (OLE) / .DOCX malware analysis — malicious · 036fc7aec9f1ba24

MALICIOUS

Office (OLE) / .DOCX

152.9 KB Created: 2020-09-22 12:58:00 Authoring application: Microsoft Office Word

MD5: 5ca359ac1dc805b61e28bf4857eb9a9b SHA-1: cd7c4f56a984e43443f835186be42269d0add174 SHA-256: 036fc7aec9f1ba2427a7f7afcea4e5189f088cd4aa047635302afb4f9770eccf

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document containing VBA macros, indicated by multiple high-severity heuristic firings including OLE_VBA_MACROS, OLE_VBA_DOCOPEN, and OLE_VBA_CREATEOBJ. The Document_Open macro is present and configured to execute, suggesting an attempt to automatically run malicious code upon opening. The VBA code appears to be obfuscated, but the presence of CreateObject and GetObject calls strongly implies the execution of arbitrary code, likely to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

Heuristics 7

ClamAV: Doc.Malware.Ewtz-9765445-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Ewtz-9765445-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
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
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `3534612e311adddbcf2e093d61bfa43aa100b688e0fa70d64062312eb6cd9cc9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	17155 bytes

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