Office (OLE) / .DOCX malware analysis — malicious · 1086ffb88505e44c

MALICIOUS

Office (OLE) / .DOCX

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

MD5: 5bf089787f80fc2dcfde81d27d9e31ec SHA-1: 715e1d7ceb3bee80dfcf4a5f783fa253b458da68 SHA-256: 1086ffb88505e44c03ff9497ac66a9df3717d361cfc1aef1cff28a1b67ae9eb1

242 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for malware delivery. The VBA code is heavily obfuscated, but the presence of CreateObject and GetObject calls suggests it attempts to instantiate and interact with system objects, likely to download and execute a secondary payload. The ClamAV detection ID 'Doc.Malware.Ewtz-9765445-0' further supports 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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