Emotet — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 8e3c3e30a1582d6e…

MALICIOUS

Office (OOXML) / .DOC

139.9 KB Created: 2019-09-16 12:22:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: fee8c1a550bcdb319b7cac1c45a7547a SHA-1: 0ff9eeefd3d389d8e4b6d5d4b6caff47755b2b64 SHA-256: 8e3c3e30a1582d6ec6ebd6a35334c4295e46aba8225fdeeb7d019acbc7d69350
320 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

This OOXML document contains VBA macros, including an AutoOpen macro, which is a strong indicator of malicious intent. The critical heuristic firing for OLE_VBA_WMI_PROCESS_CREATE indicates that the macro attempts to execute a payload using WMI's Win32_Process.Create method. ClamAV detections further confirm this as Emotet, a known downloader family. The primary function appears to be downloading and executing a second-stage payload.

Heuristics 8

  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • ClamAV: Doc.Downloader.Emotet-7163043-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7163043-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2016/wordml/cid
    • 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
b15b3c2d045e88f5efef3eb0342eb07cdb6336e516c74aed68f6101d7e60f8e9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 9509 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 40 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
54bf30582a92ab1adc4fa20446773b8cf2589ba6bf4512107005b569be2daece		 vba-project OOXML VBA project: word/vbaProject.bin 48128 bytes
Detection
ClamAV: Doc.Downloader.Emotet-7163043-0
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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