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

Static analysis result for SHA-256 8f298160a58d935f…

MALICIOUS

Office (OLE) / .DOC

545.5 KB Created: 2022-09-14 03:25:00 Authoring application: Microsoft Office Word First seen: 2022-09-14
MD5: b73fa0e12cfd250a60a52faf673a2794 SHA-1: e9c40d280c43bb03bde88d586c4ccc22775ff29c SHA-256: 8f298160a58d935fc579dbf41c5da8988e00c13d031aaa75fb13617bbaa33be2
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious Office document containing a VBA macro that is triggered by the Document_Open event. The macro is obfuscated and uses a Shell() call to execute a payload. The document body explicitly instructs the user to enable macros to view content, a common lure. The embedded URL http://empirevisioninc.xyz/cal/media.exe is likely the download location for the second-stage payload.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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
  • 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://empirevisioninc.xyz/cal/media.exe
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
21d81d0088107e4ec77dcfd84232cc3b86f6101b6434ce3d069f613ef6d2053b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 75272 bytes

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