Analysis

  • max time kernel
    186s
  • max time network
    193s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    08-10-2023 02:04

General

  • Target

    37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0.exe

  • Size

    293KB

  • MD5

    a178fe15ebf9a19326d91ed3ad96e9d0

  • SHA1

    8b1f3fffdbf5bf5e790b08a64880596b15b590c1

  • SHA256

    37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0

  • SHA512

    252eaa46ea80b0ca08471c7e73a34060f990cc1b33f35f762c1fb7358fd156c053e16a07339483fe0be5f5c94af1e49df042d6f9ff85da504c0653b351dbbbfe

  • SSDEEP

    3072:zqZwkRFuZlLi8x0CIBg3Lip5umjTWz+UFb0DRh1T8k5MU:2NRERi8d0MLaTWzZb0JM

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).

  • GoLang User-Agent 1 IoCs

    Uses default user-agent string defined by GoLang HTTP packages.

  • 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\37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0.exe
    "C:\Users\Admin\AppData\Local\Temp\37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1688
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cagdsvob\
      2⤵
        PID:2756
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vpusnqnp.exe" C:\Windows\SysWOW64\cagdsvob\
        2⤵
          PID:1924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create cagdsvob binPath= "C:\Windows\SysWOW64\cagdsvob\vpusnqnp.exe /d\"C:\Users\Admin\AppData\Local\Temp\37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0.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 cagdsvob "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2628
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start cagdsvob
          2⤵
          • Launches sc.exe
          PID:2796
        • 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:2512
      • C:\Windows\SysWOW64\cagdsvob\vpusnqnp.exe
        C:\Windows\SysWOW64\cagdsvob\vpusnqnp.exe /d"C:\Users\Admin\AppData\Local\Temp\37a05f0402fb0ec7ef73e94924e06af497d80d79d9ec01824e4aa2a14d7cc0e0.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3040
        • 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:1964
          • 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:2032

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.0MB

        MD5

        dbff277673323f16ac510e5bcb62c3af

        SHA1

        a5a16d036d05e050cc35c8e77df255fdfe02da8c

        SHA256

        727d9253ed25890ea79b2df1ff00c42bb8468c79c3b240a2b9038dd5a660bc6b

        SHA512

        0be7194e05b30d2c5336e3de65e0a2f8b4b5187d229df3a4a008ad8cb1938a03924f4157736ae2889355ad044e21d544b594f88ad8dec5c677af695e4bfe8bb8

      • C:\Windows\SysWOW64\cagdsvob\vpusnqnp.exe

        Filesize

        14.0MB

        MD5

        dbff277673323f16ac510e5bcb62c3af

        SHA1

        a5a16d036d05e050cc35c8e77df255fdfe02da8c

        SHA256

        727d9253ed25890ea79b2df1ff00c42bb8468c79c3b240a2b9038dd5a660bc6b

        SHA512

        0be7194e05b30d2c5336e3de65e0a2f8b4b5187d229df3a4a008ad8cb1938a03924f4157736ae2889355ad044e21d544b594f88ad8dec5c677af695e4bfe8bb8

      • memory/1688-1-0x0000000002330000-0x0000000002430000-memory.dmp

        Filesize

        1024KB

      • memory/1688-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1688-4-0x0000000000400000-0x000000000228F000-memory.dmp

        Filesize

        30.6MB

      • memory/1688-6-0x0000000000400000-0x000000000228F000-memory.dmp

        Filesize

        30.6MB

      • memory/1688-7-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1964-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1964-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1964-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1964-59-0x0000000000170000-0x0000000000177000-memory.dmp

        Filesize

        28KB

      • memory/1964-58-0x0000000005810000-0x0000000005C1B000-memory.dmp

        Filesize

        4.0MB

      • memory/1964-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1964-24-0x0000000001900000-0x0000000001B0F000-memory.dmp

        Filesize

        2.1MB

      • memory/1964-27-0x0000000001900000-0x0000000001B0F000-memory.dmp

        Filesize

        2.1MB

      • memory/1964-28-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/1964-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1964-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1964-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-49-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-50-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1964-51-0x0000000000160000-0x0000000000165000-memory.dmp

        Filesize

        20KB

      • memory/1964-54-0x0000000000160000-0x0000000000165000-memory.dmp

        Filesize

        20KB

      • memory/1964-55-0x0000000005810000-0x0000000005C1B000-memory.dmp

        Filesize

        4.0MB

      • memory/2032-64-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-63-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-73-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-72-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-74-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-75-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-76-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-77-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/2032-78-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/3040-11-0x0000000000400000-0x000000000228F000-memory.dmp

        Filesize

        30.6MB

      • memory/3040-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB

      • memory/3040-16-0x0000000000400000-0x000000000228F000-memory.dmp

        Filesize

        30.6MB