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

Static analysis result for SHA-256 0eb69de86dc20ff5…

MALICIOUS

Office (OLE) / .DOC

143.5 KB Created: 2020-04-10 21:30:00 Authoring application: Microsoft Office Word
MD5: 770f6dd56329554175f0667fc270115a SHA-1: 13ef28bd5f7d850e9adbe34e1d1362d42ccc4732 SHA-256: 0eb69de86dc20ff5032547385133ba14b0846ca830c449f8ed8f47935f38533a
504 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1140 Deobfuscate or Obfuscate T1071.001 Web Protocols

This malicious document contains obfuscated VBA macros that execute upon opening, leveraging WScript.Shell to download and execute a second-stage payload. The 'Document_Open' macro is designed to bypass security warnings by presenting a 'transaction receipt' lure, instructing the user to enable content. The script's use of CreateObject and Shell() calls, along with the detection of an obfuscated auto-exec loader, strongly indicates a downloader or dropper functionality.

Heuristics 13

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • ClamAV: Xls.Macro.Obfuscation-9804250-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Macro.Obfuscation-9804250-0
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Suspicious extracted artifact info 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.
  • 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
b280f6565873c3b91b04c50f3e116d38680b1b17b3cf0682c9d43e43f690ce4c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 59065 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 236 long base64-like blob(s).

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