Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    20-06-2022 11:29

General

  • Target

    2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5.exe

  • Size

    313KB

  • MD5

    2ef63c72b793d5a7646e9ccf528f502c

  • SHA1

    571541e8e638f4d464c38c0410b3e29e8710e992

  • SHA256

    2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5

  • SHA512

    de0e7bb0a7580edab9327b9cd9cd85b85d5261a5a9d0d4678159bb44ac13774c7332de0fa4a2db16285a90362c9bd5ef18ac384857d541c1c3eb8dee646ce903

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5.exe
    "C:\Users\Admin\AppData\Local\Temp\2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1888
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\riviekul\
      2⤵
        PID:3924
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\etdhuvk.exe" C:\Windows\SysWOW64\riviekul\
        2⤵
          PID:3956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create riviekul binPath= "C:\Windows\SysWOW64\riviekul\etdhuvk.exe /d\"C:\Users\Admin\AppData\Local\Temp\2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description riviekul "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start riviekul
          2⤵
          • Launches sc.exe
          PID:864
        • 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:1628
      • C:\Windows\SysWOW64\riviekul\etdhuvk.exe
        C:\Windows\SysWOW64\riviekul\etdhuvk.exe /d"C:\Users\Admin\AppData\Local\Temp\2fed0edd61ada35d4cc3d8c18e47f52e845dbb668b91ec0518c0dee12e3313b5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2304
        • 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:2008
          • 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:2260

      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\etdhuvk.exe
        Filesize

        14.7MB

        MD5

        a69a12b873a64e927da36c6dacfc13fe

        SHA1

        f1e192ef2a6b5d48f0a919eac2bd418c0a41512a

        SHA256

        884c3bab839b1ffcb454cbbe1427409d44f8dc2231d9618ac1586b33f97fd6c3

        SHA512

        383f96221a64d211cd8987ba887d27d45492618913ba3832657d7fa788c12a5b732dd4ea297e6ea31b22a676b567fe71c5ccb1a0762598515c6d55daabb75688

      • C:\Windows\SysWOW64\riviekul\etdhuvk.exe
        Filesize

        14.7MB

        MD5

        a69a12b873a64e927da36c6dacfc13fe

        SHA1

        f1e192ef2a6b5d48f0a919eac2bd418c0a41512a

        SHA256

        884c3bab839b1ffcb454cbbe1427409d44f8dc2231d9618ac1586b33f97fd6c3

        SHA512

        383f96221a64d211cd8987ba887d27d45492618913ba3832657d7fa788c12a5b732dd4ea297e6ea31b22a676b567fe71c5ccb1a0762598515c6d55daabb75688

      • memory/864-206-0x0000000000000000-mapping.dmp
      • memory/960-189-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-190-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-188-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-184-0x0000000000000000-mapping.dmp
      • memory/960-187-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-185-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-186-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1628-240-0x0000000000000000-mapping.dmp
      • memory/1764-195-0x0000000000000000-mapping.dmp
      • memory/1888-162-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-167-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-133-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-134-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-135-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-136-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-137-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-138-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-139-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-140-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-141-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-143-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-144-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-145-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-146-0x0000000002C70000-0x0000000002D1E000-memory.dmp
        Filesize

        696KB

      • memory/1888-147-0x00000000049B0000-0x00000000049C3000-memory.dmp
        Filesize

        76KB

      • memory/1888-148-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-149-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-151-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-150-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-152-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-154-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-155-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-156-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-153-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-157-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-158-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-159-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-160-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-161-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-119-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-163-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-164-0x0000000000400000-0x0000000002C6D000-memory.dmp
        Filesize

        40.4MB

      • memory/1888-165-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-166-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-132-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-168-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-169-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-170-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-246-0x0000000000400000-0x0000000002C6D000-memory.dmp
        Filesize

        40.4MB

      • memory/1888-120-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-242-0x00000000049B0000-0x00000000049C3000-memory.dmp
        Filesize

        76KB

      • memory/1888-121-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-122-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-123-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-124-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-125-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-126-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-131-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-127-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-128-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-129-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1888-130-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/2008-490-0x0000000000320000-0x0000000000335000-memory.dmp
        Filesize

        84KB

      • memory/2008-414-0x0000000000320000-0x0000000000335000-memory.dmp
        Filesize

        84KB

      • memory/2008-340-0x0000000000329A6B-mapping.dmp
      • memory/2260-516-0x000000000069259C-mapping.dmp
      • memory/2304-331-0x0000000002D80000-0x0000000002ECA000-memory.dmp
        Filesize

        1.3MB

      • memory/2304-353-0x0000000000400000-0x0000000002C6D000-memory.dmp
        Filesize

        40.4MB

      • memory/2304-333-0x0000000002D80000-0x0000000002ECA000-memory.dmp
        Filesize

        1.3MB

      • memory/3924-173-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-174-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-171-0x0000000000000000-mapping.dmp
      • memory/3924-172-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-175-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-176-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-177-0x0000000000000000-mapping.dmp
      • memory/3956-178-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-182-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-180-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-181-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-179-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB