Office (OLE) / .DOCX malware analysis — malicious · 46cad0e0ca3b2d6d

MALICIOUS

Office (OLE) / .DOCX

566.5 KB Created: 2020-02-24 10:37:00 Authoring application: Microsoft Office Word

MD5: 3952ebedf24716728b7355b8be8e71b6 SHA-1: 7181cc149f2aa58e3d54cc6336e4188d5d615138 SHA-256: 46cad0e0ca3b2d6d9d3ce691ca2887b18abc80acf0e81799fbb290cce104c8eb

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains a VBA macro that automatically executes upon opening the document, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. This macro utilizes the 'Shell()' function, a critical finding, to execute arbitrary code. The presence of 'macros.bas' further confirms the macro-based nature of this malicious document. The primary intent appears to be the execution of a second-stage payload, though the specific payload and its destination are not discernible from the provided static analysis.

Heuristics 7

Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Document_Open macro high OLE_VBA_DOCOPEN

Document_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.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)
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` `8899ed8aeb43646893e56c287297b0868b912fec0723d5153471eaaf898df7ce`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2692 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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