Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e8e3d94b43addec8…

MALICIOUS

Office (OLE)

255.0 KB Created: 2017-12-12 12:25:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: 563310571294bb3f203c517b4595e1f5 SHA-1: b0a7f6a5edd11b735478f0789004cc0f23f0c24d SHA-256: e8e3d94b43addec86e43989ea8121bcb3345958e88e674ea38a1dbf209f4ad8b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The presence of a legacy WordBasic auto-exec macro (AutoOpen) and significant OLE slack space anomalies strongly indicate a malicious document. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further supports its role as a dropper for phishing lures. No specific malware family could be confidently identified.

Heuristics 5

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 261,112 bytes but its declared streams total only 24,681 bytes — 236,431 bytes (91%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • 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 In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 359 bytes
SHA-256: f2575b78fe692a31216ec764eca5df878eba90bb0c704d73c2eae77b18a76ea6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "nMiGwQaoHIk"

Attribute VB_Name = "EQGAiRCwJHSE"

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