Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 73664a542a009d5d…

MALICIOUS

Office (OLE)

53.5 KB Created: 2018-11-08 23:11:00 Authoring application: Microsoft Office Word First seen: 2019-03-10
MD5: 2a16128dd40eb275c4e68b4374641092 SHA-1: c902d5cea6d39e2e9ec62adc772dca83fb5ad15b SHA-256: 73664a542a009d5d6ef50386aeac68fcdd0eba301d9ebd1801813413175804ed
150 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file contains a high-severity heuristic firing for PowerShell execution and a critical ClamAV detection indicating Emotet. The embedded PowerShell command is heavily obfuscated but appears to decompress and execute a second-stage payload. This is consistent with Emotet's typical behavior of downloading additional malware.

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) 327 bytes
SHA-256: c993bd942e9e78844bfa1fdc6f995beec38feab4fd6a03593c091b0739ad2dee
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "FcjqFZRjD"
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
'Macro code was removed by Symantec Disarm

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