Emotet — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 2f3d0aff6f35dff6…

MALICIOUS

Office (OOXML) / .DOC

88.0 KB Created: 2021-12-08 18:15:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: abb2c49e4857452b79ce9c1f4f00ba6e SHA-1: bc9477c6a442213f6a5afed05e53e903314da093 SHA-256: 2f3d0aff6f35dff6502af75f678a40b0705e64926d8b0c57b927a8046c0048dd
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is identified as malicious by ClamAV with a signature indicating it is a downloader for Emotet. The VBA macro contains an AutoOpen function that uses CreateObject to execute a command. The script reconstructs the command to 'c:\windows\explorer ' followed by a string derived from the document's keywords property, which is likely a URL or command to download and execute a payload. The macro also saves the document with a name derived from the keywords, potentially to disguise the malicious nature.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetUpdate122100-9914334-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetUpdate122100-9914334-1
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
6e4f93812039cf64e10654cb78bbdca7b322d048ef2bcc5c8fc81c980e694fae		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 965 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
57ceca64e49ef79baf41ad34f052023e96765cac021990bf407259c00c1d3ebc		 vba-project OOXML VBA project: word/vbaProject.bin 14336 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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