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

Static analysis result for SHA-256 b5b7eb4ca3b446cd…

MALICIOUS

Office (OOXML) / .DOC

71.6 KB Created: 2024-09-26 00:05:00 UTC Authoring application: Microsoft Office Word 12.0000
MD5: 10e0eda2a10107e5990b1a9f397a9651 SHA-1: 37f0047eced89aefefbac42fbbb2b250955c7311 SHA-256: b5b7eb4ca3b446cd87976845c04a56c33b247ae5333c9866ceb11d0fd26bcbb5
208 Risk Score

Malware Insights

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

The sample is a malicious OOXML document containing VBA macros. The presence of a Document_Open macro and a Shell() call indicates that the macro will execute arbitrary code upon opening. The CreateObject() call further suggests the potential for launching external processes or manipulating the system. No specific family could be identified, but the execution of embedded VBA code is the primary attack vector.

Heuristics 7

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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 project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
0a585531c0af3300ad0f90533aa5a2955c08ba313b9b6df85fe3b804e172626d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2741 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
529b263f35a1bc4b14f77c828618e832a1d102b206eae2be0621ec00c5b161c7		 vba-project OOXML VBA project: word/vbaProject.bin 15360 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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