Office (OLE) / .DOCX malware analysis — malicious · ef5d46380da37e1c

MALICIOUS

Office (OLE) / .DOCX

164.0 KB Created: 2021-01-21 07:19:00 Authoring application: Microsoft Office Word

MD5: 6c99875a266dd32384d556d8191e81d1 SHA-1: 57235091199af41eb56b15df0499f3702e3507d3 SHA-256: ef5d46380da37e1c4b4c2666d3252391e3c67cb04d1cf3a5163516a840635768

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The heuristics indicate a CreateObject call and p-code auto-execution, suggesting the macro attempts to run external commands or scripts. The obfuscated document body, when partially reconstructed, hints at an attempt to open a file and potentially execute it using PowerShell. The presence of a reconstructed registry key for persistence, HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy, further supports the malicious intent of establishing persistence.

Heuristics 6

Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject 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.
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
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` `6045f5f72d49d60894b3d01b2731b9077c6720a2a0e4c882459553248494ff30`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	14993 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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