Analysis

  • max time kernel
    150s
  • max time network
    163s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    22-10-2023 17:04

General

  • Target

    206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5.exe

  • Size

    254KB

  • MD5

    400d83c136d4003e1137471d3900f267

  • SHA1

    c26b5043bea1c3176d9d605b782010542ef7d26e

  • SHA256

    206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5

  • SHA512

    907cfcaa1b90d79261cbd84d3876a79d34de120ab4d6b34afef20aeef916efa1ce098967e9a568e57c476ab3f8af9ed19aa4541f91741299288cfbc881cccdd3

  • SSDEEP

    3072:WyBNUf2KxA+GRKv3XgAYUzBefFzGdrgRiyVHhoLA48vQX:9FMA+KKvHgn4tIiyVHqL

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 7 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\206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5.exe
    "C:\Users\Admin\AppData\Local\Temp\206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hbzcljpv\
      2⤵
        PID:2220
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zttloyco.exe" C:\Windows\SysWOW64\hbzcljpv\
        2⤵
          PID:2652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hbzcljpv binPath= "C:\Windows\SysWOW64\hbzcljpv\zttloyco.exe /d\"C:\Users\Admin\AppData\Local\Temp\206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2976
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hbzcljpv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2848
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hbzcljpv
          2⤵
          • Launches sc.exe
          PID:2820
        • 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:2864
      • C:\Windows\SysWOW64\hbzcljpv\zttloyco.exe
        C:\Windows\SysWOW64\hbzcljpv\zttloyco.exe /d"C:\Users\Admin\AppData\Local\Temp\206ca3f88f29ee80ca16649e17efcce1ee750c45ce1a6762f96f6d6d049993e5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2744
        • 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:2344
          • 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:804

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.0MB

        MD5

        635bce55825b8fd41b57f19ae0df93f3

        SHA1

        b882655e192ca1e5fb4c89a5bf7bacbede7c44e9

        SHA256

        c0bc5afee044c0216799d37c4f786fa67fceff76a62c153d3c1b20db98362a5a

        SHA512

        649d7a5e2809628695779d92653f251b05aab2d23fa5c82ff4474339366a4e2c5b85fc18eb3ae91d0098c3204ca7e882a4f24654c3d66f19cefbc8135cc07a03

      • C:\Windows\SysWOW64\hbzcljpv\zttloyco.exe

        Filesize

        12.0MB

        MD5

        635bce55825b8fd41b57f19ae0df93f3

        SHA1

        b882655e192ca1e5fb4c89a5bf7bacbede7c44e9

        SHA256

        c0bc5afee044c0216799d37c4f786fa67fceff76a62c153d3c1b20db98362a5a

        SHA512

        649d7a5e2809628695779d92653f251b05aab2d23fa5c82ff4474339366a4e2c5b85fc18eb3ae91d0098c3204ca7e882a4f24654c3d66f19cefbc8135cc07a03

      • memory/804-73-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-78-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-77-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-76-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-75-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-74-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-65-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/804-63-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/2096-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/2096-6-0x0000000000400000-0x00000000007C9000-memory.dmp

        Filesize

        3.8MB

      • memory/2096-7-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/2096-1-0x0000000000840000-0x0000000000940000-memory.dmp

        Filesize

        1024KB

      • memory/2096-4-0x0000000000400000-0x00000000007C9000-memory.dmp

        Filesize

        3.8MB

      • memory/2344-38-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-46-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-27-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2344-28-0x0000000000210000-0x0000000000216000-memory.dmp

        Filesize

        24KB

      • memory/2344-31-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-34-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-35-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-37-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-36-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2344-39-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-40-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-41-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-43-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-42-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-44-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-45-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-24-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2344-47-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-48-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-49-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-50-0x0000000000230000-0x0000000000240000-memory.dmp

        Filesize

        64KB

      • memory/2344-51-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2344-54-0x0000000000240000-0x0000000000245000-memory.dmp

        Filesize

        20KB

      • memory/2344-55-0x0000000005480000-0x000000000588B000-memory.dmp

        Filesize

        4.0MB

      • memory/2344-58-0x0000000005480000-0x000000000588B000-memory.dmp

        Filesize

        4.0MB

      • memory/2344-59-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2344-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2344-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2344-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2344-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2344-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2744-11-0x0000000000400000-0x00000000007C9000-memory.dmp

        Filesize

        3.8MB

      • memory/2744-17-0x0000000000400000-0x00000000007C9000-memory.dmp

        Filesize

        3.8MB

      • memory/2744-10-0x00000000009A0000-0x0000000000AA0000-memory.dmp

        Filesize

        1024KB