Emotet — Office (OOXML) malware analysis

Static analysis result for SHA-256 472bee8efbfde981…

MALICIOUS

Office (OOXML)

135.2 KB Created: 2020-01-23 21:44:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2020-08-25
MD5: 980d5d881a6c93be678415239eca8a48 SHA-1: 8a44550c049425b28cbed9bac9f7099c7720949c SHA-256: 472bee8efbfde9813b5c2dae531d63324a5be70c794a9efed42b3aa4528e45e1
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV with the signature 'Doc.Dropper.Emotet-7560803-0', indicating it functions as a dropper. The presence of a 'Document_Open' macro and a 'GetObject' call strongly suggests that the VBA code is designed to execute automatically when the document is opened. This macro likely downloads and executes a secondary payload, a common Emotet tactic.

Heuristics 6

  • ClamAV: Doc.Dropper.Emotet-7560803-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-7560803-0
  • VBA project inside OOXML medium 3 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordml/cexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2018/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 15189 bytes
SHA-256: 0120ae0f258457865b39b390b760a85e9a3fcd8556a30967d32478b5b53d07b2
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Riuffuom"
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
Private Sub Document_open()
Txoinpzt.Dbavtlna (s)
End Sub

Attribute VB_Name = "Yvuantprpxck"
Attribute VB_Base = "0{34598C98-0347-444E-BCB6-5A2D5BB038D4}{1746AAB0-A769-4A69-8359-2DD341CB9122}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Libjcfsl"
Attribute VB_Base = "0{568D85D5-1EFF-454D-A155-DAA414AB695E}{ECF11205-2AA5-4DE6-962E-3C30FD0B8F3A}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Nhnsespmdaf"
Attribute VB_Base = "0{297785D6-549D-42F3-A8B6-AE2C3FD8FF1E}{01C33210-CF28-4C7A-8787-2CB925502FE8}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Vuxzqzvoe"
Attribute VB_Base = "0{1CDDBE1B-50AD-4511-9F9D-D10A12BC1C2F}{7D562876-56FC-445A-A9E0-8F2474FCFFB2}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Zjyzdqxwltd"
Attribute VB_Base = "0{4338F56F-A376-4F5E-A4F4-7B643431DB54}{B580317D-9ABD-4182-A6F0-7C288A519311}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Ppkthsmyicfo"
Attribute VB_Base = "0{287924BB-0675-4C78-8A3C-1E3517378BCF}{2685122D-7D06-41C5-8C71-5572CFC5CB45}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Cmwcjwxsu"
Attribute VB_Base = "0{D4FAD385-A275-47B5-AE8C-9C8731D47A1C}{5A0C0F36-1445-4A9D-A31B-AA2E599C73FC}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Incirlrmcka"
Attribute VB_Base = "0{911DDFFC-CA15-4DC5-A12C-D9AA945985A6}{2DD79FE3-C5E4-4210-8F7B-7C66BDC6897F}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Hlyrrhtk"
Attribute VB_Base = "0{13C566EA-AAB4-4FAB-B7DD-D2C5C0719AA6}{CE9AC1CD-749F-4CD1-9B89-A60645561432}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Vkpqtmwxuq"
Attribute VB_Base = "0{EBC379D1-BA73-4252-BF14-A207AC8058F3}{EBECA5E7-03CC-4B15-A39C-11A9D62416A1}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Fjpqrncducyuv"
Attribute VB_Base = "0{40577E0A-9B82-4E83-B940-1103707BF6EA}{654BF218-7FF7-46AD-8031-D14CD3E81B96}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
A
... (truncated)
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 116224 bytes
SHA-256: add701379f68c819ffa7572fb19620c027af876d22e1aac5f3fd85594c5ca43c
Detection
ClamAV: Doc.Dropper.Emotet-7560803-0
Obfuscation or payload: unlikely

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