Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 df91a1ac4a5bd0b2…

MALICIOUS

Office (OLE)

261.5 KB Created: 2019-10-15 12:30:00 Authoring application: Microsoft Office Word First seen: 2019-11-20
MD5: cba7a3314890b227872cbe445cd87253 SHA-1: 09eb3fc6993dbe02d46745fef5462dbda62c5aff SHA-256: df91a1ac4a5bd0b217a595df36604a3fe138f48d993d13cdd63001ed9a7b1d21
290 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a critical heuristic for an obfuscated auto-exec VBA loader, specifically an AutoOpen macro that uses GetObject for execution. ClamAV identifies this as Emotet. The VBA script contains numerous commented-out URLs, suggesting it is designed to download and execute a second-stage payload. The presence of VBA macros and the AutoOpen function strongly indicate a malicious document, likely delivered via spearphishing.

Heuristics 9

  • ClamAV: Doc.Downloader.Emotet-10019714-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-10019714-0
  • 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
  • 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.
  • 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://jazmyne.com/licensed/tasty-frozen-fish In document text (OLE body)
    • http://benjamin.com/toys-baby--toys/developerIn document text (OLE body)
    • https://pablo.net/californiaIn document text (OLE body)
    • http://jose.biz/street/matrixIn document text (OLE body)
    • http://hubert.net/rusticIn document text (OLE body)
    • https://neha.com/right-sizedIn document text (OLE body)
    • https://ciara.name/bandwidth/facilitator/enableIn document text (OLE body)
    • http://jarrell.org/coherent/bottom-line/profit-focusedIn document text (OLE body)
    • http://roselyn.name/envisioneerIn document text (OLE body)
    • https://ozella.com/workforce/consultant/burgIn document text (OLE body)
    • https://greta.org/transmitting/valley/jbodIn document text (OLE body)
    • https://rhoda.name/olive/generating/leverageIn document text (OLE body)
    • https://macy.biz/rustic-plastic-tableIn document text (OLE body)
    • https://sarah.com/content-based/vortals/jeweleryIn document text (OLE body)
    • http://vicky.name/synthesizeIn document text (OLE body)
    • https://dallin.com/savings-account/portals/demand-driven0In document text (OLE body)
    • https://meredith.name/mauritius-rupee/ergonomic-concrete-bacon/babyIn document text (OLE body)
    • https://chelsey.name/program/orchestrationIn document text (OLE body)
    • https://cornell.info/limeIn document text (OLE body)
    • https://berry.org/methodologies/architect/vision-oriented�In document text (OLE body)
    • http://aletha.org/executive/mission/paradigmIn document text (OLE body)
    • http://allene.info/homeIn document text (OLE body)
    • https://adrain.net/withdrawal/deposit/smsIn document text (OLE body)
    • https://peggie.name/unbranded-frozen-saladIn document text (OLE body)
    • http://lindsey.name/generating/electronicsIn document text (OLE body)
    • http://jennie.org/microchipIn document text (OLE body)
    • http://cordelia.biz/target/orchestratorIn document text (OLE body)
    • http://jayne.biz/function/plastic/corporate�In document text (OLE body)
    • https://jeffrey.biz/calculate/factors/initiativesIn document text (OLE body)
    • http://dane.name/transmitting/nationalIn document text (OLE body)
    • https://skyla.net/dynamic/cottonIn document text (OLE body)
    • https://dee.net/licensed/moroccan-dirham/goIn document text (OLE body)
    • https://caterina.net/slovenia/cambridgeshire/driverIn document text (OLE body)
    • http://makayla.org/port�In document text (OLE body)
    • http://scot.net/north-korean-won/cliffsIn document text (OLE body)
    • https://samir.name/cyan/fresh/books--electronicsIn document text (OLE body)
    • http://katarina.org/cross-platformIn document text (OLE body)
    • https://garry.org/personal-loan-account/louisiana/personal-loan-accountIn document text (OLE body)
    • https://louie.com/inletIn document text (OLE body)
    • http://bridgette.com/invoice/international/gorgeous-steel-ballIn document text (OLE body)
    • http://sadie.biz/engage/small-concrete-pants/re-contextualizedIn document text (OLE body)
    • https://aliyah.net/migration�In document text (OLE body)
    • http://hershel.info/compellingIn document text (OLE body)
    • https://elvera.biz/deposit/investment-accountIn document text (OLE body)
    • http://carrie.com/internal/automotiveIn document text (OLE body)
    • https://howell.name/infomediaries/multi-byteIn document text (OLE body)
    • https://beau.name/analyst/sas/handcraftedIn document text (OLE body)
    • http://henry.name/sports-jewelery--jewelery/squareIn document text (OLE body)
    • http://christine.name/fantasticIn document text (OLE body)
    • https://aric.net/feed/agent�In document text (OLE body)
    +2042 more URL(s)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 169751 bytes
SHA-256: e71c02f3ac08f6aa9fcda8fd9d100d456a4ca29d89b2506f0f61813c25b20964
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "IADXBkBkGAZ"
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 = "BQUQxkAwGUcU, 0, 0, MSForms, TextBox"
Attribute VB_Control = "IwDGQoxAADADZ, 1, 1, MSForms, TextBox"
Attribute VB_Control = "H4AoA4AAkZA, 2, 2, MSForms, TextBox"
Attribute VB_Control = "WDDUAc_A, 3, 3, MSForms, TextBox"
Attribute VB_Control = "UAGcABUCUD, 4, 4, MSForms, TextBox"
Attribute VB_Control = "QUw1AQZD1, 5, 5, MSForms, TextBox"

Attribute VB_Name = "DAAGAZxD_"
Function TkDAoQ1AD()
On Error Resume Next
   Rem https://adrain.net/withdrawal/deposit/sms https://peggie.name/unbranded-frozen-salad
Rem http://lindsey.name/generating/electronics http://jennie.org/microchip
Rem http://cordelia.biz/target/orchestrator http://jayne.biz/function/plastic/corporate
Rem https://jeffrey.biz/calculate/factors/initiatives http://dane.name/transmitting/national
Rem https://skyla.net/dynamic/cotton https://dee.net/licensed/moroccan-dirham/gorgeous-frozen-towels
Rem https://jazmyne.com/licensed/tasty-frozen-fish http://benjamin.com/toys-baby--toys/developer
Rem https://pablo.net/california http://jose.biz/street/matrix
Rem http://hubert.net/rustic https://neha.com/right-sized
Rem https://ciara.name/bandwidth/facilitator/enable http://jarrell.org/coherent/bottom-line/profit-focused
Rem http://roselyn.name/envisioneer https://ozella.com/workforce/consultant/burg
Rem https://greta.org/transmitting/valley/jbod https://rhoda.name/olive/generating/leverage
Rem https://macy.biz/rustic-plastic-table https://sarah.com/content-based/vortals/jewelery
Rem http://vicky.name/synthesize https://dallin.com/savings-account/portals/demand-driven
Rem https://meredith.name/mauritius-rupee/ergonomic-concrete-bacon/baby https://chelsey.name/program/orchestration
Rem https://cornell.info/lime https://berry.org/methodologies/architect/vision-oriented
Rem http://aletha.org/executive/mission/paradigm http://allene.info/home-loan-account/designer
Rem https://caterina.net/slovenia/cambridgeshire/driver http://makayla.org/port
Rem http://scot.net/north-korean-won/cliffs https://samir.name/cyan/fresh/books--electronics
Rem http://katarina.org/cross-platform https://garry.org/personal-loan-account/louisiana/personal-loan-account
Rem https://louie.com/inlet http://bridgette.com/invoice/international/gorgeous-steel-ball
Rem http://sadie.biz/engage/small-concrete-pants/re-contextualized https://aliyah.net/migration
Rem http://hershel.info/compelling https://elvera.biz/deposit/investment-account
Rem http://carrie.com/internal/automotive https://howell.name/infomediaries/multi-byte
Rem https://beau.name/analyst/sas/handcrafted http://henry.name/sports-jewelery--jewelery/square
Rem http://christine.name/fantastic https://aric.net/feed/agent
   Rem https://bulah.info/redundant/tanzanian-shilling/ergonomic-wooden-table https://aditya.org/personal-loan-account/ivory
Rem https://anabelle.biz/direct/generating http://ressie.org/montana/national
Rem http://kay.com/cotton http://ramiro.info/iterate/mobile
Rem http://foster.com/innovate https://janis.org/arkansas/attitude-oriented/calculating
Rem https://flossie.biz/square/metrics/deposit https://kaleb.com/capacitor
Rem https://norris.net/national/rubber http://carol.net/checking-account
Rem https://jett.name/reboot/ergonomic-rubber-bike http://reymundo.org/assistant
Rem https://katelin.info/reduced/practical http://marielle.info/olive
Rem http://providenci.org/planner/invoice https://merl.name/consultant/massachusetts/optical
Rem https://damon.name/zero-administration/cross-platform/gorgeous http://giles.com/scsi/mint-green/frozen
Rem https://edythe.org/leverage/generate http://augustus.info/connect/sensor
Rem http://davon.biz/multi-byte/hong-kong https://ferne.biz/bypassing
Rem http://electa.name/expressway/hawaii/course https://murray.com/orchestrate/avon/sports--music
Rem ht
... (truncated)

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