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

Static analysis result for SHA-256 d105536c7b43d74f…

MALICIOUS

Office (OLE) / .DOCX

42.5 KB Created: 2021-05-31 15:09:00 Authoring application: Microsoft Office Word
MD5: 6af9f29005392a31d7c894d51428909a SHA-1: 329d7c5fbed4eb6b22a749d09f325ffb2bfd0082 SHA-256: d105536c7b43d74fb3c32f8179261835f52007d8fb83eb8bdf1972756156a1c9
400 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The sample contains VBA macros, including a Document_Open macro, that utilize WScript.Shell and CreateObject to execute obfuscated commands. These commands construct a URL, likely to download and execute a second-stage payload. The presence of Shell() calls and WScript.Shell usage strongly indicates a downloader or droppper functionality.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • Obfuscated VBA Shell command with URL critical OLE_VBA_OBFUSCATED_SHELL_URL
    VBA macro invokes Shell with command text assembled through decoder or string-manipulation functions and includes a URL. This is a high-confidence downloader/dropper pattern, stronger than Shell or URL evidence on their own.
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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 https://cdn.discordapp.com/attachments/837594015989366787/848913486688157696/e3.ex
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
b2fa440dbee57a1368f3a5df2a407096a927e13472e8c5ae19f2db4df0453f25		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 865 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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