Analysis

  • max time kernel
    151s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    12/11/2020, 18:48

General

  • Target
    document-1822227617.xlsb
  • Size 292KB
  • Sample201112-bfdc6xvxbx
  • SHA256 ae9d33113befb8fdfe7dfdcdb1da86cc9593f087b2af1c5c446dcb8b87da33f3
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • smokeloader

Version
  • 2020

C2
  • http://we11wdsgd.com/

rc4.i32
rc4.i32

Signatures

  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 764 IoCs
  • Suspicious behavior: MapViewOfSection 31 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 74 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\document-1822227617.xlsb
    1⤵
    • Loads dropped DLL
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\ghohtj\npnppr\gwqxfoii.exe
      "C:\ghohtj\npnppr\gwqxfoii.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      PID:268
  • C:\Windows\SysWOW64\explorer.exe
    C:\Windows\SysWOW64\explorer.exe
    1⤵
      PID:1056
    • C:\Windows\explorer.exe
      C:\Windows\explorer.exe
      1⤵
        PID:1072
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        1⤵
          PID:268
        • C:\Windows\SysWOW64\explorer.exe
          C:\Windows\SysWOW64\explorer.exe
          1⤵
            PID:1540
          • C:\Windows\SysWOW64\explorer.exe
            C:\Windows\SysWOW64\explorer.exe
            1⤵
              PID:2020
            • C:\Windows\explorer.exe
              C:\Windows\explorer.exe
              1⤵
                PID:1792
              • C:\Windows\SysWOW64\explorer.exe
                C:\Windows\SysWOW64\explorer.exe
                1⤵
                  PID:1964
                • C:\Windows\explorer.exe
                  C:\Windows\explorer.exe
                  1⤵
                    PID:752
                  • C:\Windows\SysWOW64\explorer.exe
                    C:\Windows\SysWOW64\explorer.exe
                    1⤵
                      PID:1052
                    • C:\Windows\explorer.exe
                      C:\Windows\explorer.exe
                      1⤵
                        PID:1216
                      • C:\Windows\SysWOW64\explorer.exe
                        C:\Windows\SysWOW64\explorer.exe
                        1⤵
                          PID:1088
                        • C:\Windows\SysWOW64\explorer.exe
                          C:\Windows\SysWOW64\explorer.exe
                          1⤵
                            PID:1712
                          • C:\Windows\SysWOW64\explorer.exe
                            C:\Windows\SysWOW64\explorer.exe
                            1⤵
                              PID:1140
                            • C:\Windows\explorer.exe
                              C:\Windows\explorer.exe
                              1⤵
                                PID:1968
                              • C:\Windows\SysWOW64\explorer.exe
                                C:\Windows\SysWOW64\explorer.exe
                                1⤵
                                  PID:1328

                                Network

                                      MITRE ATT&CK Enterprise v6

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      memory/268-60-0x0000000000320000-0x0000000000324000-memory.dmp

                                      memory/268-5-0x000000000059B000-0x000000000059C000-memory.dmp

                                      memory/268-6-0x0000000001F90000-0x0000000001FA1000-memory.dmp

                                      memory/268-59-0x0000000000310000-0x0000000000319000-memory.dmp

                                      memory/752-611-0x00000000000F0000-0x00000000000F6000-memory.dmp

                                      memory/752-610-0x00000000000E0000-0x00000000000EC000-memory.dmp

                                      memory/1052-756-0x0000000000310000-0x0000000000319000-memory.dmp

                                      memory/1052-757-0x0000000000320000-0x0000000000324000-memory.dmp

                                      memory/1056-17-0x0000000000080000-0x00000000000EB000-memory.dmp

                                      memory/1056-19-0x00000000001D0000-0x0000000000245000-memory.dmp

                                      memory/1072-48-0x00000000000E0000-0x00000000000EC000-memory.dmp

                                      memory/1072-49-0x00000000000F0000-0x00000000000F7000-memory.dmp

                                      memory/1088-1060-0x00000000003A0000-0x00000000003C2000-memory.dmp

                                      memory/1088-1059-0x0000000000370000-0x0000000000397000-memory.dmp

                                      memory/1140-1190-0x0000000000390000-0x000000000039B000-memory.dmp

                                      memory/1140-1191-0x00000000003A0000-0x00000000003A6000-memory.dmp

                                      memory/1216-907-0x0000000000070000-0x0000000000075000-memory.dmp

                                      memory/1216-906-0x0000000000060000-0x0000000000069000-memory.dmp

                                      memory/1244-1411-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1417-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1440-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1445-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-607-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-608-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-465-0x00000000026B0000-0x00000000026B9000-memory.dmp

                                      memory/1244-1444-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1443-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-753-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1442-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-327-0x00000000026B0000-0x00000000026BB000-memory.dmp

                                      memory/1244-1441-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-904-0x00000000026B0000-0x00000000026B4000-memory.dmp

                                      memory/1244-1434-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1439-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1438-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-982-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-983-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-984-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-986-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-985-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-990-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-989-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-988-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-987-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-991-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-992-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-993-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-994-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-996-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-995-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-997-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-998-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1000-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-999-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1007-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1016-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1015-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1014-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1013-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1012-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1011-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1010-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1009-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1008-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1006-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1005-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1004-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1003-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1002-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1001-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1437-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-126-0x00000000026B0000-0x00000000026B4000-memory.dmp

                                      memory/1244-1436-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1140-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-1435-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1433-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1188-0x00000000026B0000-0x00000000026B5000-memory.dmp

                                      memory/1244-127-0x00000000026B0000-0x00000000026B4000-memory.dmp

                                      memory/1244-56-0x00000000026B0000-0x00000000026B7000-memory.dmp

                                      memory/1244-8-0x0000000002CC0000-0x0000000002CD5000-memory.dmp

                                      memory/1244-1432-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1431-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1430-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1429-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1428-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1427-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1406-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1407-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1408-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1409-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1410-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1426-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1412-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1414-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1413-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1415-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1416-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1425-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1418-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1419-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1421-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1420-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1422-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1423-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1244-1424-0x00000000026B0000-0x00000000026B6000-memory.dmp

                                      memory/1328-1322-0x0000000000360000-0x0000000000368000-memory.dmp

                                      memory/1328-1320-0x0000000000350000-0x000000000035B000-memory.dmp

                                      memory/1540-129-0x0000000000390000-0x000000000039B000-memory.dmp

                                      memory/1540-130-0x00000000003A0000-0x00000000003AA000-memory.dmp

                                      memory/1712-1142-0x0000000000310000-0x0000000000319000-memory.dmp

                                      memory/1792-330-0x0000000000060000-0x000000000006E000-memory.dmp

                                      memory/1792-331-0x0000000000070000-0x0000000000079000-memory.dmp

                                      memory/1876-0-0x000007FEF5D50000-0x000007FEF5FCA000-memory.dmp

                                      memory/1964-468-0x0000000000310000-0x0000000000319000-memory.dmp

                                      memory/1964-469-0x0000000000320000-0x0000000000325000-memory.dmp

                                      memory/1968-1259-0x0000000000070000-0x0000000000077000-memory.dmp

                                      memory/1968-1256-0x0000000000060000-0x000000000006D000-memory.dmp

                                      memory/2020-192-0x0000000000320000-0x0000000000327000-memory.dmp

                                      memory/2020-189-0x0000000000310000-0x000000000031B000-memory.dmp