Office (OLE) / .DOCX malware analysis — malicious · 87c070b5d75a3493

MALICIOUS

Office (OLE) / .DOCX

30.5 KB Created: 2020-12-05 02:37:00 Authoring application: Microsoft Office Word

MD5: 6e9dfd07f0e68d0bbddda36f0dea7a6c SHA-1: 85662ef16e2cce24f8960c3a2077d01b179ca5d5 SHA-256: 87c070b5d75a349308526030407e3085acc2bef99b65357dcb00d0ba255d3fe1

180 Risk Score

Malware Insights

MITRE ATT&CK

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

The file contains VBA macros, specifically an AutoOpen macro that utilizes CreateObject to execute code. This indicates the document is designed to run malicious code upon opening. The presence of 'macros.bas' suggests a macro-based attack. The primary intent appears to be the execution of a second-stage payload, though the specific mechanism is not detailed in the provided heuristics.

Heuristics 6

AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen 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` `93092a6608b17f06ba59b4974c61b9327e10ca406f2d93bc9c1c2e1e8488c87c`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1897 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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