Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5205ef3150d7a37b…

MALICIOUS

Office (OLE)

132.4 KB Created: 2018-11-28 19:11:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: 85ce3706fe9450bdae87583fcc75605f SHA-1: 61c872a0e75aba226b9a424149eee2861aa4833e SHA-256: 5205ef3150d7a37bd4ddb4480f7a73e6df8ab9638afd495ae2f177366c973d3b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains a legacy WordBasic AutoOpen macro that references PowerShell, indicating an attempt to execute a malicious script. The script constructs a PowerShell command to download and execute a payload from a series of concatenated URLs. The ClamAV detection 'Doc.Dropper.Agent-6978788-0' further supports the malicious nature of the file.

Heuristics 5

  • ClamAV: Doc.Dropper.Agent-6978788-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6978788-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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) 283 bytes
SHA-256: 66bbc3f953c59a2c935039d2e9c3662502a742ec21dcd884d66410ff7a644852
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "zTSBzVmTO"
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

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