Emotet — Office (OOXML) malware analysis

Static analysis result for SHA-256 7435cc93517f4d81…

MALICIOUS

Office (OOXML)

133.7 KB Created: 2020-01-22 19:44:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2020-05-25
MD5: 8133aeaa649c22ca853fe39954f98620 SHA-1: 84720c9b9a40f9776b749e9fc245cec81628a3d9 SHA-256: 7435cc93517f4d811949bb602de4fa486d27ee61ba1fd2ec7e19bfa3453c4b4c
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is identified as malicious by ClamAV with a signature indicating it is a dropper for the Emotet family. The presence of a Document_Open macro and the associated VBA code strongly suggests that the macro is designed to execute obfuscated commands, likely to download and run a secondary payload. The ClamAV detection name directly points to Emotet.

Heuristics 6

  • ClamAV: Doc.Dropper.Emotet-7557732-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Emotet-7557732-0
  • 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) 10505 bytes
SHA-256: ddb7d7b0c5fff173e2ba1a4f42cdc9e06b0251603ca5c07a0600849c8266c0ef
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Giqtgcabkzovu"
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()
Zyeiehlpz.Lugqscezyfv
End Sub

Attribute VB_Name = "Kfcjehxnktni"
Attribute VB_Base = "0{41506D99-C548-415E-A7D2-2D3548E10EFE}{E737D015-1D3C-43B9-9D29-627EF16ABCA4}"
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 = "Guygrsdi"
Attribute VB_Base = "0{ADAE43F0-01A0-432A-B229-6465575481CA}{15D7DDDD-8694-4DF5-87EB-FAB99B0AC36D}"
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 = "Ieknhvmxmjg"
Attribute VB_Base = "0{2178EE91-FDE7-434B-8CA8-EC20471FB614}{1DC3D04C-3B4A-4BA7-A15B-C93C755456E8}"
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 = "Nmvjbgzza"
Attribute VB_Base = "0{72D22BE2-FC6C-438A-B7FF-4CDEFBDE0D10}{4BF38329-69EE-438F-ADBC-56B2888C96ED}"
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 = "Eczjfqvgbvuvu"
Attribute VB_Base = "0{A1BD2E4F-CCAB-4A3F-B95C-0FAEDE91FEA2}{126A9124-E383-46A4-BED6-09013735A71D}"
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 = "Xyvbguool"
Attribute VB_Base = "0{18F23E2F-448E-4099-A124-58A411D28A03}{0CDCE63F-DFBF-4E45-86F0-0CCF5E516B89}"
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 = "Iccnoiimifwds"
Attribute VB_Base = "0{E55D09FC-D112-46CD-9C70-0488F9D71C53}{3ECB41AB-9E96-414F-BD06-85CBE0DEB2D3}"
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 = "Zqksqbdviae"
Attribute VB_Base = "0{30F594B4-6A02-44DC-8F33-FEE9A9ECB49F}{38A7A2F3-F3E7-4C00-A5AE-363DAA854AE2}"
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 = "Dqonpjhsenh"
Attribute VB_Base = "0{C1764000-8F85-4352-B54E-6A153739E8B7}{F02E8DBB-A859-46E3-9461-12E2F6C558C3}"
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 = "Hwabvdfsvyd"
Attribute VB_Base = "0{19D8FA3D-96C2-4AE3-8C1F-91CC38EE0944}{68A88E49-0E86-4B2D-86C7-615AB7A882BF}"
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 = "Ufhumjjt"
Attribute VB_Base = "0{A1034F69-B636-4AC1-8090-4590EB726C67}{C5BA01DA-8CC3-4822-B6EC-C422DBFFF23D}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = F
... (truncated)
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 98304 bytes
SHA-256: e16f18cb5f5898a4fbb18a76183fc7fadd93709d396dd32e848ad08352d67c8b
Detection
ClamAV: Doc.Dropper.Emotet-7557732-0
Obfuscation or payload: unlikely

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