Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 8bca7bb49b79cacd…

MALICIOUS

Office (OLE) / .DOCX

158.1 KB Created: 2020-10-19 11:46:00 Authoring application: Microsoft Office Word
MD5: 87a0eae1b61f7451d66066747a30dc5e SHA-1: 32ce82fe942514d4e0763893bddfea3599096dca SHA-256: 8bca7bb49b79cacdbc27a7b3116a66eec5f09ea7d51b3ebd72215dd586eba53c
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file contains VBA macros, specifically a Document_Open auto-execution macro, which is a common technique for initial execution. The heuristic firings indicate the use of CreateObject and p-code auto-execution, suggesting the macro is designed to run automatically upon opening the document. The ClamAV detection as 'Doc.Trojan.Agent-9780503-0' further confirms its malicious nature. The document body, though heavily obfuscated, contains strings that appear to relate to PowerShell encoding, hinting at a potential secondary payload execution. No specific malware family could be confidently identified.

Heuristics 7

  • ClamAV: Doc.Trojan.Agent-9780503-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Agent-9780503-0
  • 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.

FilenameKindSourceSize
macros.bas
df3f11a486897c7a189da6e4d0ac7fa240cbe9ec205152865e455c6dee8f09c5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15642 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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