Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 80574e2af235e706…

MALICIOUS

Office (OLE)

76.6 KB Created: 2018-11-06 07:12:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: f5b34299bd2a26b12c292ce68668b0e8 SHA-1: 8d659b4944079724a9b13396c57ad9bbd2844494 SHA-256: 80574e2af235e706b80533af73f8e9592a86bdbd3ec9965667e8172895dde0a7
150 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file was detected as Emotet, a known malware family. Static analysis revealed a critical ClamAV detection and high-severity heuristics indicating the use of PowerShell and command-line execution. The embedded PowerShell command decodes and executes a Base64-encoded payload, likely to download and run a second-stage malicious artifact. The VBA macros were found to be empty, suggesting the primary malicious functionality resides within the document body's obfuscated command.

Heuristics 5

  • ClamAV: Doc.Dropper.Emotet-6769504-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-6769504-0
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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) 284 bytes
SHA-256: 0144fd3e19060aeb21c08f7820bf4e22a3afdaa9480aeeaa47c635d196998f69
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "HJwECcZECQ"
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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