Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 02:49

General

  • Target

    7415b020bf2eed9fa0ff3a319f2d3e40_NeikiAnalytics.exe

  • Size

    212KB

  • MD5

    7415b020bf2eed9fa0ff3a319f2d3e40

  • SHA1

    9cf2dec0942555db1cc77be982e7e4484bca4d8c

  • SHA256

    a67b07be04fb143a3162c1aa6c7e9588c1fd0faef334dc16cc6fcf49bd2b780e

  • SHA512

    457dc5ff9689dee4fe5936f21394cd5668e8f9f7d5b0fca370bdfe25e0bb3f1ef804c97f634831c11f4552306faf19b798619bec48a8e7155f490338bd0d51e0

  • SSDEEP

    3072:Ds3v1H4kITXM+w4oH+WseM7wxs69r3v0zR5qwO3Vw0blXmr4ibpIgIo6e:6vsjzw3HzFfAR5JOFw0ZCVpvIo

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7415b020bf2eed9fa0ff3a319f2d3e40_NeikiAnalytics.exe
    "C:\Users\Admin\AppData\Local\Temp\7415b020bf2eed9fa0ff3a319f2d3e40_NeikiAnalytics.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4828
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vzbbxwr\
      2⤵
        PID:1324
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vhxkyxpt.exe" C:\Windows\SysWOW64\vzbbxwr\
        2⤵
          PID:836
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vzbbxwr binPath= "C:\Windows\SysWOW64\vzbbxwr\vhxkyxpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\7415b020bf2eed9fa0ff3a319f2d3e40_NeikiAnalytics.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1192
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vzbbxwr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:452
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vzbbxwr
          2⤵
          • Launches sc.exe
          PID:2368
        • 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:5008
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4828 -s 572
          2⤵
          • Program crash
          PID:4796
      • C:\Windows\SysWOW64\vzbbxwr\vhxkyxpt.exe
        C:\Windows\SysWOW64\vzbbxwr\vhxkyxpt.exe /d"C:\Users\Admin\AppData\Local\Temp\7415b020bf2eed9fa0ff3a319f2d3e40_NeikiAnalytics.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1776
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:4488
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1776 -s 516
          2⤵
          • Program crash
          PID:2688
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4828 -ip 4828
        1⤵
          PID:4448
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1776 -ip 1776
          1⤵
            PID:2640

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            11.6MB

            MD5

            d40afc8d3273c0e84a015f1ab65f06d3

            SHA1

            99fe35eeeba234e1a69cb96e13d4d277e3b7fa74

            SHA256

            afa84828e1c3bffd4fe8d1198e6dddba07c876439cbb028d9623860bcde49054

            SHA512

            39499fd4470211f32e21c4ab05383a28e52252adde929c63d215266db5f9a6a312366cc4cb5e2f687e2262125ad6ec20f3a705ac08ee8b1290675c5a91125a3b

          • memory/1776-12-0x0000000000400000-0x0000000002C94000-memory.dmp

            Filesize

            40.6MB

          • memory/4488-42-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-14-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

          • memory/4488-8-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

          • memory/4488-51-0x00000000027D0000-0x00000000027D7000-memory.dmp

            Filesize

            28KB

          • memory/4488-19-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

          • memory/4488-23-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-13-0x0000000000390000-0x00000000003A5000-memory.dmp

            Filesize

            84KB

          • memory/4488-40-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-41-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-39-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-17-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

          • memory/4488-20-0x0000000001950000-0x0000000001956000-memory.dmp

            Filesize

            24KB

          • memory/4488-47-0x0000000007180000-0x000000000758B000-memory.dmp

            Filesize

            4.0MB

          • memory/4488-50-0x0000000007180000-0x000000000758B000-memory.dmp

            Filesize

            4.0MB

          • memory/4488-46-0x00000000019F0000-0x00000000019F5000-memory.dmp

            Filesize

            20KB

          • memory/4488-43-0x00000000019F0000-0x00000000019F5000-memory.dmp

            Filesize

            20KB

          • memory/4488-26-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-27-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-28-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-38-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-37-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-36-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-35-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-34-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-33-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-32-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-31-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-30-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4488-29-0x0000000001960000-0x0000000001970000-memory.dmp

            Filesize

            64KB

          • memory/4828-2-0x0000000002D20000-0x0000000002D33000-memory.dmp

            Filesize

            76KB

          • memory/4828-10-0x0000000000400000-0x0000000002C94000-memory.dmp

            Filesize

            40.6MB

          • memory/4828-3-0x0000000000400000-0x0000000000415000-memory.dmp

            Filesize

            84KB

          • memory/4828-1-0x0000000002F20000-0x0000000003020000-memory.dmp

            Filesize

            1024KB

          • memory/4828-11-0x0000000000400000-0x0000000000415000-memory.dmp

            Filesize

            84KB