Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 a1bdb2f601307954…

MALICIOUS

Office (OLE)

74.1 KB Created: 2018-11-08 03:58:00 Authoring application: Microsoft Office Word First seen: 2019-06-27
MD5: 1c7bf5312e56dbcd35e5f73eb8224699 SHA-1: 195a8e3e210a5027e20c3b5aa3b86ec6abd9117d SHA-256: a1bdb2f60130795493e55aebdec178673305fb9038b46135a05253f24823c0fb
190 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The file was detected as Emotet, a known malware family. It contains obfuscated PowerShell commands designed to download and execute a second-stage payload. The embedded command reconstructs a Base64 encoded string which is then decompressed and executed, indicating a downloader functionality.

Heuristics 6

  • ClamAV: Doc.Dropper.Emotet-6769504-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-6769504-0
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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) 286 bytes
SHA-256: 6e1a68551f63d6f5e5f4caa5066834e5ad566d295643705c825e1b7a28d0f453
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "CUAoYJGkiocz"
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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